One thing I would be careful of is to check that the PSU has 20+4 ATX power connector. If it is 24 pin then it most likely won't fit your motherboard. Increasingly I am finding modern PSUs don't support 20 pin power.

RetroPCCupboard wrote on 2025-06-08, 08:10:

One thing I would be careful of is to check that the PSU has 20+4 ATX power connector. If it is 24 pin then it most likely won't fit your motherboard. Increasingly I am finding modern PSUs don't support 20 pin power.

I think this Motherboard has a 24 pin connector and a 4 pin P4

Fredelicious wrote on 2025-06-08, 08:14:

I think this Motherboard has a 24 pin connector and a 4 pin P4

Ah, I looked on the gigabyte website before I posted and it looked like 20 pin. I see now that there is a plug in the last 4 pins:

Even on a 24pin connector, 4 pins tend to be removable (20+4 pin), so it goes into a 20-pin on mainboard.

Ydee wrote on 2025-06-08, 10:21:

Even on a 24pin connector, 4 pins tend to be removable (20+4 pin), so it goes into a 20-pin on mainboard.

If it says 20+4 then yes, for sure. But if it just says 24 pin, I wouldn't bet on it

Then:

I like to try to double the power available to the power required. If you're system could draw 350W, than I'd use a 700W PSU. It's a little overkill, but you won't need to worry if you upgrade any of the components later.

You could go with 650W as well, but I don't see a lot of price difference between the two in my market for good quality brands.

fosterwj03 wrote on 2025-06-08, 13:10:

I like to try to double the power available to the power required. If you're system could draw 350W, than I'd use a 700W PSU. It's a little overkill, but you won't need to worry if you upgrade any of the components later.

You could go with 650W as well, but I don't see a lot of price difference between the two in my market for good quality brands.

When I did the online calculator, it said a 350w would be about 50-60% of the capacity. I don't know if that seems low or I put in the wrong info. Or if that's just 2006 stuff.

I'll have a look again.

Fredelicious wrote on 2025-06-08, 16:24:

fosterwj03 wrote on 2025-06-08, 13:10:

I like to try to double the power available to the power required. If you're system could draw 350W, than I'd use a 700W PSU. It's a little overkill, but you won't need to worry if you upgrade any of the components later.

You could go with 650W as well, but I don't see a lot of price difference between the two in my market for good quality brands.

When I did the online calculator, it said a 350w would be about 50-60% of the capacity. I don't know if that seems low or I put in the wrong info. Or if that's just 2006 stuff.

I'll have a look again.

Given the components, 300W of possible power draw sounds about right. You'll want a PSU with a bit more power to handle transient power spikes.

Qoltec ATX SilentLine PSUs are nice for retro PCs.