johnvosh wrote on 2021-05-02, 20:16:
What would you recommend for a good S939 board? I found a Gigabyte GA-K8N51GMF-9 for a decent price, is it any good? I also found an ASUS A8N-VM CSM and an ASUS A8N5X
I haven't used those exact boards but I have an A8N-SLI. Based on problems I had with it, I believe that it cannot reliably support cards that draw the maximum amount of power from the video card slot (75W I believe).
Pretty much in any generation of cards, there will be one model that sits near that threshold, being the most powerful card that doesn't require auxiliary power connectors.
I was trying to run my A8N-SLI with a GT240-GDDR5, which is one of those type of cards. The motherboard was prone to abruptly power off when Minecraft was running. I don't know about other games, that's all anybody was playing on it at the time.
It was not the PSU switching off, it was the motherboard because it could easily be restarted by just pushing the power button. I tried watching temperatures in Speedfan and saw no sign of overheating to explain it.
I remember fiddling with the SLI card-thingy and believe I tried both Express x16 slots but had the same problem. I know I also had the extra 4-pin Molex plugged into the motherboard at least part of the time (even though it should be redundant with the "P4" connector).
Once I swapped the GT240 to a GT520 the problem was fixed.
I have not tried any higher powered card that uses auxiliary power connectors, but I'm guessing those would work better since they probably don't max out the 75W budget on the slot.
I don't know if the A8N-variants you listed above would share the same problem.