Hi! I got a hold of an X850 XT Platinum Edition GPU. I'm using an Asus P5PKL-AM/PS motherboard with a Pentium dual core CPU.
Initially I had a 450W PSU with 4 leads - 1st lead is 20+4 connector, 2nd is a 4-pin connector, and leads 3 and 4 each have a SATA and a molex connector. I tried only testing the GPU first without any other IDE/SATA connections, so I plugged in leads 1 and 2, and plugged molex connectors from leads 3 & 4 into the GPU's dual molex to 6 pin connector (see here: https://i.ebayimg.com/images/g/YccAAOSw93JlQNp8/s-l1600.jpg). The GPU was artifacting heavily. A couple of times the POST screen didn't show up, and booting into a live linux usb caused complete screen corruption.
Then I tried a second PSU (250W) with 4 leads - 1st is a 20 pin connector (that I plugged into the mobo's 24 pin slot), 2nd a 4 pin connector, lead 3 has 2 molex, and lead 4 has 2 molex plus a floppy connector pin. Now with this, the GPU worked just fine - even completed the 3dmark01 SE test end-to-end. I tried 2 sound cards in this config, with one sound card, there was a single instance of artifacting on the post screen. Immediately I switched off and replaced with a second sound card - and in this config it's completely stable and no artifacts, even though lead 4 is connected to both the GPU and an IDE hard drive.
Here are specs of the two PSUs (first one is the problematic one, 2nd is stable):
Hope that gives a good enough context. I've seen two issues - in Everest I can see the GPU temperature is around 75-77 deg C range. Is that normal or should I do something about it?
Second issue is: how do I decide what's a proper PSU configuration? How many leads, what kind of connectors, and what voltage/current/power specs should it have (subject to the constraint that at least one floppy connector and 3 molex connectors should be there)?
Please let me know if any more info needed from my end
Initially I had a 450W PSU with 4 leads - 1st lead is 20+4 connector, 2nd is a 4-pin connector, and leads 3 and 4 each have a SATA and a molex connector. I tried only testing the GPU first without any other IDE/SATA connections, so I plugged in leads 1 and 2, and plugged molex connectors from leads 3 & 4 into the GPU's dual molex to 6 pin connector (see here: https://i.ebayimg.com/images/g/YccAAOSw93JlQNp8/s-l1600.jpg). The GPU was artifacting heavily. A couple of times the POST screen didn't show up, and booting into a live linux usb caused complete screen corruption.
Then I tried a second PSU (250W) with 4 leads - 1st is a 20 pin connector (that I plugged into the mobo's 24 pin slot), 2nd a 4 pin connector, lead 3 has 2 molex, and lead 4 has 2 molex plus a floppy connector pin. Now with this, the GPU worked just fine - even completed the 3dmark01 SE test end-to-end. I tried 2 sound cards in this config, with one sound card, there was a single instance of artifacting on the post screen. Immediately I switched off and replaced with a second sound card - and in this config it's completely stable and no artifacts, even though lead 4 is connected to both the GPU and an IDE hard drive.
Here are specs of the two PSUs (first one is the problematic one, 2nd is stable):
Hope that gives a good enough context. I've seen two issues - in Everest I can see the GPU temperature is around 75-77 deg C range. Is that normal or should I do something about it?
Second issue is: how do I decide what's a proper PSU configuration? How many leads, what kind of connectors, and what voltage/current/power specs should it have (subject to the constraint that at least one floppy connector and 3 molex connectors should be there)?
Please let me know if any more info needed from my end