You've selected DDR RAM when your motherboard takes SDR RAM. This is a little harder to find and a little more expensive. 256MB will be plenty for Windows 98 games and if you keep it to one stick that limits your chances of errors.

The Compaq board may have proprietary front panel headers, so make sure the case has individual pins for the various buttons and LEDs.

If the PSU goes it will be hard to track down another. If you had a retail 370 board then you could use any modern power supply for this build but the board would be a lot more expensive. It does seem to be quite weak but it's the sort of system it would have powered originally...

The graphics card will be fine and is a sensible cheap option. It may struggle to run later games (2001) at max settings and high resolutions and frame rates, especially if it had a 64bit memory bus not 128bit.

What is the model number for the Live? Some OEM ones need specific drivers, people have the most success with 0060 and 0100.

DOS support is... Interesting. Give it a try and see what you think, you may decide an ISA system will be needed.

The board will probably not support tualitin CPUs so you're limited to 1000MHz ish. Given the (sensible) budget nature of the PC this in practice may be more like 800MHz. Perfectly functional for Windows 98 gaming.

Once the RAM is swapped it seems like a sensible first Windows 98 PC. It will play games (well) to 2001 or so

Almoststew1990 wrote on 2020-10-22, 11:11:

You've selected DDR RAM when your motherboard takes SDR RAM. This is a little harder to find and a little more expensive. 256MB […]
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You've selected DDR RAM when your motherboard takes SDR RAM. This is a little harder to find and a little more expensive. 256MB will be plenty for Windows 98 games and if you keep it to one stick that limits your chances of errors.

The Compaq board may have proprietary front panel headers, so make sure the case has individual pins for the various buttons and LEDs.

If the PSU goes it will be hard to track down another. If you had a retail 370 board then you could use any modern power supply for this build but the board would be a lot more expensive. It does seem to be quite weak but it's the sort of system it would have powered originally...

The graphics card will be fine and is a sensible cheap option. It may struggle to run later games (2001) at max settings and high resolutions and frame rates, especially if it had a 64bit memory bus not 128bit.

What is the model number for the Live? Some OEM ones need specific drivers, people have the most success with 0060 and 0100.

DOS support is... Interesting. Give it a try and see what you think, you may decide an ISA system will be needed.

The board will probably not support tualitin CPUs so you're limited to 1000MHz ish. Given the (sensible) budget nature of the PC this in practice may be more like 800MHz. Perfectly functional for Windows 98 gaming.

Once the RAM is swapped it seems like a sensible first Windows 98 PC. It will play games (well) to 2001 or so

Thanks for reply.

I already have many parts.
Like:
GPU: Nvidia FX5500 256MB
Ram: 512 SDR RAM (not DDR400 RAM)
Audio: Creative Labs Sound Blaster Live! 5.1 (Model: SB0220)
Compaq 187498-001 Socket 370 Motherboard and case that was original compaq case that this MB used.

So this PSU: Compaq PS-6151-6C 145W will work with my system? Because it's already on it's way (bought i from ebay)
Or i need to order more powerful?

Maybe this will be better psu for my build?

https://www.ebay.com/itm/HP-Compaq-573943-001 … ly/153788468454

I'm not sure I can give a definitive yes or no answer. If it was brand new, yes probably. At this age I would be a bit nervous, but what other options do you have? It's a Compaq board and needs a Compaq PSU and any you buy will likely be similar watts and a similar age. It may be "powerful" enough in theory but at this age its efficiency might be less than advertised.

I would probably try it but without any drives and soundcard attached, but it is your system and money and risk so it's up to you!

JanisD wrote on 2020-10-22, 12:43:

Maybe this will be better psu for my build?

https://www.ebay.com/itm/HP-Compaq-573943-001 … ly/153788468454

If the pin out for the ATX connector matches your board that would give you a little more headroom yeah.

Almoststew1990 wrote on 2020-10-22, 12:45:

JanisD wrote on 2020-10-22, 12:43:

Maybe this will be better psu for my build?

https://www.ebay.com/itm/HP-Compaq-573943-001 … ly/153788468454

If the pin out for the ATX connector matches your board that would give you a little more headroom yeah.

i already blew up one of these 145w Psu today 😒 and ordered another
Now i canceled order of the 145w psu
The problem is that the most of the psu doesnt fit in this case
and i want to order new one, but i can't find any that fits
Actual case:
https://imgur.com/SmZSmtb

Okey, did a little research
Used this 5V/3.3V Rail Current to get some knowledge

Which one would you pick?

https://www.ebay.com/itm/SEASONIC-ORIGINAL-30 … pAAAOSwCRVfjeVR
Or
https://www.ebay.com/itm/ENERMAX-300-Watt-Pow … zUwAAOSwcnpTrB7~

What's the exact modeal of the Compaq? google of the M/B I'm thinking its a Deskpro EN SFF however on the case itself you should have something like
Deskpro EN ENL/P800/10e/6/128c
(which also tells you how it started life if your interested) , in this case a P3 800, 10GB HDD, 128MB ram if my memory is correct.

I thought I ran one of these with standard PSU back in the day. As you say it didn't fit in the case but was just a temporary setup.
This page has few of the non standard pinouts anyway
https://pinouts.ru/Power/#Compaq