Side by side

12 V RGB vs 5 V ARGB motherboard lighting headers

On MSI’s documented boards, JRGB is 12 V/4-pin and JRAINBOW is 5 V/3-pin. Connecting a 5 V strip to the 12 V header can cause hardware damage.

Computer-generated illustration, not a photograph. — P347 · Connector12 V four-pin motherboard RGB header (MSI JRGB)

How they differ

MSI’s JRGB and JRAINBOW are different lighting families with different documented voltage and contact conventions.

The cited MSI JRGB is non-addressable lighting; JRAINBOW is the addressable-lighting connection. S458 · S458
The JRAINBOW diagram intentionally leaves a position absent in its span. Read the manual’s alignment rather than forcing a superficially similar plug. S591
Lighting leads are distinct from the system-fan connection in MSI’s diagram. S591

What this comparison does not establish: MSI warns of damage from connecting the lower-voltage strip to JRGB and requires shutdown/disconnection before changes. S458 · S591

Choose the next check

Match exact board labels and accessory voltage/role, then follow the board maker’s handling instructions.

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At a glance

Source-scoped form facts; counts, variants and unknowns are distinct
Field	12 V four-pin motherboard RGB header (MSI JRGB)	5 V addressable RGB header (MSI JRAINBOW)
Type	Connector	Connector
Family	PC internal	PC internal
Shape	led header	led header
Nominal contacts	4 (MSI JRGB)S458Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.	3 (MSI JRAINBOW)S458Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.
Positions / cavity span	4 (Claim C347C); 4 (MSI B550-A PRO JRGB1)S591 · S757Separate exact examples; retain each value’s source, role, axis and part scope. V142: named MSI B550-A PRO manual version 6.0 (2024/02) or explicitly identified Noctua family only. Role/recognition evidence, not generic wiring, safe mating, pinout approval, dimensions or installed-device certification.	4 (Claim C348D); 4 (MSI B550-A PRO four-position span, position 3 absent); 4 (MSI B550-A PRO JRAINBOW1–2)S591 · S757Separate exact examples; retain each value’s source, role, axis and part scope. V142: named MSI B550-A PRO manual version 6.0 (2024/02) or explicitly identified Noctua family only. Role/recognition evidence, not generic wiring, safe mating, pinout approval, dimensions or installed-device certification. Exact named example MSI B550-A PRO JRAINBOW1–2: Device-specific5V addressable RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No universalARGBpitch, wire-sideview or specimenmarkings inferred.
Contact rows	1 (MSI B550-A PRO JRGB1)S757Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example MSI B550-A PRO JRGB1: Device-specific12V RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No2.54mmpitch inferred. Reference designator in diagram is not evidence of physical specimen markings.	1 (MSI B550-A PRO JRAINBOW1–2)S757Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example MSI B550-A PRO JRAINBOW1–2: Device-specific5V addressable RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No universalARGBpitch, wire-sideview or specimenmarkings inferred.
Connector role	header (MSI JRGB)S458Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.	header (MSI JRAINBOW)S458Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.
Key distinction	Connecting a five-volt addressable LED accessory to a twelve-volt RGB header can damage the accessory.	Voltage and signaling class are more important than a superficial resemblance between small lighting headers.

Full evidence ledger and sources ↓

Illustrations are computer-generated with prior AI visual review; independent technical and rights review pending. A comparison is not a compatibility verdict.

This comparison stays within one evidence layer.

All selected records are Connector records. Similar layer does not mean compatible, interchangeable or safe to mate.

Families represented: PC internal

The reference ledger

Read the same question across.

2 selected records · 15 fields
No score. No compatibility verdict.

On a narrow screen, scroll the table sideways or open the field-by-field reading view below. Illustrations are not a size comparison.

Comparison of selected field notes; source links accompany each documented specification
What you are comparing	P347 / Connector12 V four-pin motherboard RGB header (MSI JRGB) Identification schematic · not to scale · drawing review pending	P348 / Connector5 V addressable RGB header (MSI JRAINBOW) Identification schematic · not to scale · drawing review pending
Layer	Connector	Connector
Key distinction	Connecting a five-volt addressable LED accessory to a twelve-volt RGB header can damage the accessory.	Voltage and signaling class are more important than a superficial resemblance between small lighting headers.
Nominal contacts	4 (MSI JRGB)S458Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.	3 (MSI JRAINBOW)S458Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.
Positions / cavity span	4 (Claim C347C); 4 (MSI B550-A PRO JRGB1)S591 · S757Separate exact examples; retain each value’s source, role, axis and part scope. V142: named MSI B550-A PRO manual version 6.0 (2024/02) or explicitly identified Noctua family only. Role/recognition evidence, not generic wiring, safe mating, pinout approval, dimensions or installed-device certification.	4 (Claim C348D); 4 (MSI B550-A PRO four-position span, position 3 absent); 4 (MSI B550-A PRO JRAINBOW1–2)S591 · S757Separate exact examples; retain each value’s source, role, axis and part scope. V142: named MSI B550-A PRO manual version 6.0 (2024/02) or explicitly identified Noctua family only. Role/recognition evidence, not generic wiring, safe mating, pinout approval, dimensions or installed-device certification. Exact named example MSI B550-A PRO JRAINBOW1–2: Device-specific5V addressable RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No universalARGBpitch, wire-sideview or specimenmarkings inferred.
Populated contacts	4 (MSI JRGB); 4 (MSI B550-A PRO JRGB1)S458 · S757Separate exact examples; retain each value’s source, role, axis and part scope. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval. Exact named example MSI B550-A PRO JRGB1: Device-specific12V RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No2.54mmpitch inferred. Reference designator in diagram is not evidence of physical specimen markings.	3 (MSI JRAINBOW, positions 1/2/4); 3 (MSI B550-A PRO JRAINBOW1–2)S458 · S757Separate exact examples; retain each value’s source, role, axis and part scope. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval. Exact named example MSI B550-A PRO JRAINBOW1–2: Device-specific5V addressable RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No universalARGBpitch, wire-sideview or specimenmarkings inferred.
Contact rows	1 (MSI B550-A PRO JRGB1)S757Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example MSI B550-A PRO JRGB1: Device-specific12V RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No2.54mmpitch inferred. Reference designator in diagram is not evidence of physical specimen markings.	1 (MSI B550-A PRO JRAINBOW1–2)S757Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example MSI B550-A PRO JRAINBOW1–2: Device-specific5V addressable RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No universalARGBpitch, wire-sideview or specimenmarkings inferred.
Contact pitch	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Dimensions / axis	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Connector role	header (MSI JRGB)S458Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.	header (MSI JRAINBOW)S458Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.
Coupling / latch	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Keying / polarization	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	absent position 3 (MSI B550-A PRO JRAINBOW)S591Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V142: named MSI B550-A PRO manual version 6.0 (2024/02) or explicitly identified Noctua family only. Role/recognition evidence, not generic wiring, safe mating, pinout approval, dimensions or installed-device certification.
Documented MSI JRGB form	Four contacts; 12 V lighting category — not a universal wiring mapC347A	Not an equivalent field
Role and recognition scope	Board header — MSI B550-A PRO JRGB1. Original qualitative study only; no wiring or fit approval.C347C · C347D · C347E	Board header — MSI B550-A PRO JRAINBOW1–2. Original qualitative study only; no wiring or fit approval.C348C · C348D · C348E
Documented MSI JRAINBOW form	Not an equivalent field	Three contacts; 5 V addressable lighting category — model check requiredC348A
Evidence	C347A,C347B,C347C,C347D,C347E → Independent review pending	C348A,C348B,C348C,C348D,C348E → Independent review pending

Read field by field — no sideways scrolling

The same selected records, fields, values and source links as the table. Missing fields remain non-equivalent; no values are merged.

Layer

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: Connector
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: Connector

Key distinction

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: Connecting a five-volt addressable LED accessory to a twelve-volt RGB header can damage the accessory.
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: Voltage and signaling class are more important than a superficial resemblance between small lighting headers.

Nominal contacts

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: 4 (MSI JRGB)S458Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: 3 (MSI JRAINBOW)S458Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.

Positions / cavity span

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: 4 (Claim C347C); 4 (MSI B550-A PRO JRGB1)S591 · S757Separate exact examples; retain each value’s source, role, axis and part scope. V142: named MSI B550-A PRO manual version 6.0 (2024/02) or explicitly identified Noctua family only. Role/recognition evidence, not generic wiring, safe mating, pinout approval, dimensions or installed-device certification.
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: 4 (Claim C348D); 4 (MSI B550-A PRO four-position span, position 3 absent); 4 (MSI B550-A PRO JRAINBOW1–2)S591 · S757Separate exact examples; retain each value’s source, role, axis and part scope. V142: named MSI B550-A PRO manual version 6.0 (2024/02) or explicitly identified Noctua family only. Role/recognition evidence, not generic wiring, safe mating, pinout approval, dimensions or installed-device certification. Exact named example MSI B550-A PRO JRAINBOW1–2: Device-specific5V addressable RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No universalARGBpitch, wire-sideview or specimenmarkings inferred.

Populated contacts

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: 4 (MSI JRGB); 4 (MSI B550-A PRO JRGB1)S458 · S757Separate exact examples; retain each value’s source, role, axis and part scope. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval. Exact named example MSI B550-A PRO JRGB1: Device-specific12V RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No2.54mmpitch inferred. Reference designator in diagram is not evidence of physical specimen markings.
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: 3 (MSI JRAINBOW, positions 1/2/4); 3 (MSI B550-A PRO JRAINBOW1–2)S458 · S757Separate exact examples; retain each value’s source, role, axis and part scope. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval. Exact named example MSI B550-A PRO JRAINBOW1–2: Device-specific5V addressable RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No universalARGBpitch, wire-sideview or specimenmarkings inferred.

Contact rows

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: 1 (MSI B550-A PRO JRGB1)S757Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example MSI B550-A PRO JRGB1: Device-specific12V RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No2.54mmpitch inferred. Reference designator in diagram is not evidence of physical specimen markings.
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: 1 (MSI B550-A PRO JRAINBOW1–2)S757Separate exact examples; retain each value’s source, role, axis and part scope. Exact named example MSI B550-A PRO JRAINBOW1–2: Device-specific5V addressable RGB header. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No universalARGBpitch, wire-sideview or specimenmarkings inferred.

Contact pitch

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Dimensions / axis

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Connector role

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: header (MSI JRGB)S458Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: header (MSI JRAINBOW)S458Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.

Coupling / latch

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Keying / polarization

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: absent position 3 (MSI B550-A PRO JRAINBOW)S591Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. V142: named MSI B550-A PRO manual version 6.0 (2024/02) or explicitly identified Noctua family only. Role/recognition evidence, not generic wiring, safe mating, pinout approval, dimensions or installed-device certification.

Documented MSI JRGB form

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: Four contacts; 12 V lighting category — not a universal wiring mapC347A
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: Not an equivalent field

Role and recognition scope

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: Board header — MSI B550-A PRO JRGB1. Original qualitative study only; no wiring or fit approval.C347C · C347D · C347E
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: Board header — MSI B550-A PRO JRAINBOW1–2. Original qualitative study only; no wiring or fit approval.C348C · C348D · C348E

Documented MSI JRAINBOW form

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: Not an equivalent field
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: Three contacts; 5 V addressable lighting category — model check requiredC348A

Evidence

12 V four-pin motherboard RGB header (MSI JRGB)P347 / Connector: C347A,C347B,C347C,C347D,C347E →
Independent review pending
5 V addressable RGB header (MSI JRAINBOW)P348 / Connector: C348A,C348B,C348C,C348D,C348E →
Independent review pending

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Open the field notes Read source-linked facts and limitations.Compare another pair Start from a common confusion.Check a connection A comparison is not a compatibility verdict.

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Evidence behind this page

Scope first. Source second. Approval separate.

2 linked sources · 10 scoped claims · 0 sources with inspection/access flags.

Page scope: Evidence behind the compared records; the editorial comparison still needs separate review.

Assessment 2026-10-22 · earliest scheduled source review 2027-01-07. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 2 source scopes, access limits and dates

S458 · Installation method for JRGB and JRAINBOW connectors on MSI motherboards

MSI · Unclassified publisher domain · inspected 2026-10-09 · due 2027-01-07

Within inspection window

Scoped support: Manufacturer-specific 12V 4-pin JRGB and 5V 3-pin JRAINBOW distinction, power-off and damage warning.

Not established / limitations: Other LED headers and proprietary variants exist. No universal header assignment or exact LED current assumption.

Locator: JRGB connector; JRAINBOW connector; warning on voltage mismatch; motherboard manual check

S591 · MSI B550-A PRO User Guide, version 6.0 (2024/02)

MSI · Unclassified publisher domain · inspected 2026-10-13 · due 2027-01-11

Within inspection window

Scoped support: Named B550-A PRO board header identities, diagram-level contact/key arrangements, control modes and RGB mismatch warnings.

Not established / limitations: Observed document is not a real-hardware inspection, installed-device approval, wiring guide, current revision guarantee or manufacturing specification.

Locator: PDF pp.33, 36–38, 40–41; p.59 / printed ix revision history. Source diagrams visually inspected at zero-based pages 32,35,36,37,39,40,58.

Trace 10 claims to their source records

C347A · P347

MSI identifies JRGB as a 12 V, four-pin motherboard lighting header.

Claim scope: Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.

Source links: S458 · Evidence trail → (private workspace)

C347B · P347

MSI warns that connecting a five-volt LED strip to its twelve-volt JRGB header causes damage.

Claim scope: Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.

Source links: S458 · Evidence trail → (private workspace)

C347C · P347

B550-A PRO describes JRGB1 as a four-position 12V 5050 RGB-strip connection.

Claim scope: V142: named MSI B550-A PRO manual version 6.0 (2024/02) or explicitly identified Noctua family only. Role/recognition evidence, not generic wiring, safe mating, pinout approval, dimensions or installed-device certification.

Source links: S591 · Evidence trail → (private workspace)

C347D · P347

MSI’s RGB-fan diagram separates the lighting lead from the system-fan connection.

Source links: S591 · Evidence trail → (private workspace)

C347E · P347

MSI warns that connecting a 5V LED strip to JRGB can damage the strip.

Source links: S591 · Evidence trail → (private workspace)

C348A · P348

MSI identifies JRAINBOW as a five-volt, three-pin addressable-RGB motherboard header.

Claim scope: Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.

Source links: S458 · Evidence trail → (private workspace)

C348B · P348

MSI directs users to turn off power, check model-specific manuals, and warns that mixing five-volt strips with twelve-volt JRGB damages equipment.

Claim scope: Manufacturer-specific family/physical identification only. No inferred device wiring, mating verification or installation approval.

Source links: S458 · Evidence trail → (private workspace)

C348C · P348

B550-A PRO describes JRAINBOW1–2 as 5V WS2812B addressable-LED connections.

Source links: S591 · Evidence trail → (private workspace)

C348D · P348

The JRAINBOW source diagram leaves position 3 absent within a four-position span.

Source links: S591 · Evidence trail → (private workspace)

C348E · P348

MSI requires power-supply shutdown and disconnection from the outlet before LED-strip changes.

Source links: S591 · Evidence trail → (private workspace)

Prepare this page for review →Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.