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What PSU for retro computer on 775Dual-880Pro motherboard?

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14 hours ago, The Great Sephiroth said:

only PCI-Express generation 1 GPUs work.

In practice, I myself ran an MSI Twin Frozer GTS250 1GB on a board with the 1.0 PCI-e version. The board was Fujitsu Siemens D2317-A1, made in 2005-2006 or so.

It had the 1.0 PCI-e version only.

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You might be right. I read somewhere that those first PCI-E 2.0 cards (like 8800 GT) have different/worse PCI-E 2.0 implementation and can't fully go back to PCI-E gen 1. Later GPUs may have different/better PCI-E 2.0 implementation and may go down to gen 1. So I read. Would have to test this.

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On 6/14/2023 at 12:57 PM, jaclaz said:

30*3.3+30*5+40*12=99+150+480=729 Watts, so a 750 W would be more suitable



By the laws of physics, the voltage always drops. So any *good* and *new* PSU is only 82%, at best. Some expensive declare 85% efficiency, so these calculations are for a mediocre 500-550W PSU.

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