VOGONS


MS-5169 4:0 caps values

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First post, by Mamba

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Hello!
I am searching for help in identifying the correct values of caps for this board.
4.0 is mandatory as they differs between revisions.
Can someone help?

Reply 1 of 23, by Mamba

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Anyone?

Reply 2 of 23, by TELVM

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Ciao!

Clarification please: Are you asking for the OEM cap values, or for guidance on replacement cap values?

Let the air flow!

Reply 3 of 23, by rasz_pl

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I wouldnt stress too much over values. Pick sizes that fit your footprint and values similar to other contemporary boards.
470-1000uF 6.3V 105°C for the 5V rails
2200-3300uF 16V 105°C for ones in front of SMPS
1000-2200uF 6.3V 105°C for ones on CPU Vcore rail around CPU socket
ANY cheap lowesr brand will do, you wont be running this board 24/7 for 10 years after all.

https://github.com/raszpl/sigrok-disk FM/MFM/RLL decoder
https://github.com/raszpl/FIC-486-GAC-2-Cache-Module (AT&T Globalyst)
https://github.com/raszpl/386RC-16 ram board
https://github.com/raszpl/Zenith_ZBIOS Zenith Z-386 MFM-300 ZBIOS disassembly

Reply 4 of 23, by Mamba

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Thanks, specifically need caps values around AGP slot.

Reply 5 of 23, by TELVM

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Rare pic of a MS-5169 taken at just the right angle to show the values on most of the caps:

file.php?mode=view&id=246471

^ From what I've seen, in some boards they put 8mm 6.3V 1000uF In the spots A, B & C (instead of 100uF).

Let the air flow!

Reply 6 of 23, by MikeSG

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Low cost Electrolytic caps need 2x the voltage for the rail they're on. Eg 10v+ for 5v rail.

Polymer caps only need to be slightly above. EG. 6.3v for 5v rail.

You can go to a larger capacitance with low ESR Polymer caps. Or copy what's there on the later revisions.

Reply 7 of 23, by TELVM

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MikeSG wrote on 2026-07-29, 16:29:

Low cost Electrolytic caps need 2x the voltage for the rail they're on. Eg 10v+ for 5v rail ...

Good lytic caps rated at 6.3V are perfectly fine for +5V circuits.

If "2x" was a "need", 25V caps would be mandatory on +12V circuits. That is not the case.

.

Low cost lytic caps should be avoided like the plague they are ...

ChongX Capacitor test - Aliexpress JUNK - Buyer Beware!

Let the air flow!

Reply 8 of 23, by Mamba

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TELVM wrote on 2026-07-29, 16:15:
Rare pic of a MS-5169 taken at just the right angle to show the values on most of the caps: […]
Show full quote

Rare pic of a MS-5169 taken at just the right angle to show the values on most of the caps:

file.php?mode=view&id=246471

^ From what I've seen, in some boards they put 8mm 6.3V 1000uF In the spots A, B & C (instead of 100uF).

Hello thank you so much, but I think it is not the 4.0.
The 4.0 has the cap south of AGP bigger than the others.

Reply 9 of 23, by shevalier

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100*16v d6.3mm (for any small diameter and capacity)
680-1000*6.3v 8mm
1500-2200*6.3v 10mm
Any cheap general use polymer capacitor
For example, Kemet or Wurst
This rule is more than enough for any motherboard, including Socket 370. They don't have 12V power circuits.
Don't overcomplicate it.

Aopen MX3S, PIII-S Tualatin 1133, Radeon 9800Pro@XT BIOS, Audigy 4 SB0610
JetWay K8T8AS, Athlon DH-E6 3000+, Radeon HD2600Pro AGP, Audigy 2 Value SB0400
Gigabyte Ga-k8n51gmf, Turion64 ML-30@2.2GHz , Radeon X800GTO PL16, Diamond monster sound MX300

Reply 10 of 23, by TELVM

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Mamba wrote on 2026-07-29, 18:09:

... The 4.0 has the cap south of AGP bigger than the others.

Yep, on the 4.0 they put a fatter one in that spot:

file.php?mode=view&id=246476

Can't read its value in any web pic, but it is 10mm diameter and not tall, probably 16mm height.

My best guess is that it is a 10x16mm 6.3V 1200~1800uF.

Let the air flow!

Reply 11 of 23, by ciacara

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Hello everyone,
I think I’ve worked out Mamba’s problem: his motherboard no longer has its original capacitors, otherwise it would read the values automatically, and he’d like to restore it to its original condition and appearance.

The MSI MS5169 AL9 has a different layout for each revision.

MSI MS5169 AL9 VER:1

The attachment MSI-MS-5169-ver-1.jpg is no longer available

MSI MS5169 AL9 VER:2

The attachment MSI-MS-5169-ver-2.jpg is no longer available

MSI MS5169 AL9 VER:2.1

The attachment MSI-MS-5169-ver-2.1.jpg is no longer available

MSI MS5169 AL9 VER:4.0

The attachment MSI-MS-5169-ver-4.jpg is no longer available

As you can see from the photos, version 4.0 has capacitors with different diameters and values compared to the other versions.

I hope that someone who owns a version 4 motherboard with the original capacitors – or who has replaced them but with capacitors of the same value – could please post a photo or give you the exact values.

I don’t own this motherboard, so I can’t help you.

My passion for the world of computers starts with the Commodore.
3DFX and Amiga, the two Phoenixes!!!

Reply 12 of 23, by Karbist

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The retro web photo was submitted by vegge and he is a member of this forum, maybe send him a message and see if he still has the board.

Reply 13 of 23, by ciacara

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The MSI MS5169 AL9 VER:3.0 has also been found

The attachment MSI-MS-5169-ver-3.jpg is no longer available

It’s different from the others as always, but the AGP area appears to be identical to version 4.

My passion for the world of computers starts with the Commodore.
3DFX and Amiga, the two Phoenixes!!!

Reply 14 of 23, by TELVM

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^ Nice clarification on the different versions Ciacara, bravo! 👍

Let the air flow!

Reply 16 of 23, by ciacara

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TELVM wrote on 2026-07-30, 04:21:

^ Nice clarification on the different versions Ciacara, bravo! 👍

Thank you. Once I get stuck in, I don’t stop until I’ve finished...😉

Whilst browsing, I found the solution:
Rohde & Schwarz AMIQ Modulation Generator

The Rohde & Schwarz AMIQ is an electronics laboratory instrument.

It is used to generate complex digital radio signals, such as those used by mobile phones and Wi-Fi, for testing other equipment.

I’m telling you about this piece of equipment because an electronics enthusiast, Tom Verbeure, amongst the many projects you can see at this address: https://tomverbeure.github.io/
has restored a device that houses a little treasure inside:
https://tomverbeure.github.io/2026/06/28/Rohd … tem-Repair.html

an MSI MS-5169 AL9 VER:4.0 Socket 7 motherboard:

The attachment a.jpg is no longer available
The attachment a1.jpg is no longer available
The attachment a2.jpg is no longer available
The attachment a5.jpg is no longer available

Among the work he carried out to fully restore the equipment was a complete replacement of all the capacitors, with an almost complete BOM listing their values and a shopping list ready for purchase on Mouser:

The attachment a6.jpg is no longer available

I think this answers Mamba’s questions about the capacitors near the AGP slot: the larger one is a 1000uF 6.3v/10v with a diameter of 10x16mm, whilst the other is also a 1000uF 6.3v/10v with a diameter of 8x16mm.

What struck me most about this restoration was discovering that such a piece of equipment was powered by a Socket 7 motherboard.

This isn’t meant to be an invitation to go on a hunt for the lost treasure – not least because this piece of kit is usually very expensive – but I wanted to share my discovery with you.

However, there is currently one available, non-functional, on eBay for $99...😉 😁

My passion for the world of computers starts with the Commodore.
3DFX and Amiga, the two Phoenixes!!!

Reply 17 of 23, by TELVM

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ciacara wrote on 2026-07-30, 11:52:

^ Wow, amazing stuff! An interesting read, thanks for sharing 👍 . And he gives wise advice on motherboard recapping.

On such a rare and expensive piece of lab equipment, I would have gone full jap poly-mod.

Let the air flow!

Reply 18 of 23, by ciacara

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TELVM wrote on 2026-07-30, 14:27:
ciacara wrote on 2026-07-30, 11:52:

On such a rare and expensive piece of lab equipment, I would have gone full jap poly-mod.

Yes, actually I agree with you 😉

My passion for the world of computers starts with the Commodore.
3DFX and Amiga, the two Phoenixes!!!

Reply 19 of 23, by rasz_pl

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TELVM wrote on 2026-07-30, 14:27:

On such a rare and expensive piece of lab equipment

Did you meant obsolete and unsupported? Its 25 years old and was build to help debug original 11Mbit 802.11b wifi, 2G GSM and DECT. Today you can do everything and more with a $500 KiwiSDR

https://github.com/raszpl/sigrok-disk FM/MFM/RLL decoder
https://github.com/raszpl/FIC-486-GAC-2-Cache-Module (AT&T Globalyst)
https://github.com/raszpl/386RC-16 ram board
https://github.com/raszpl/Zenith_ZBIOS Zenith Z-386 MFM-300 ZBIOS disassembly