Artifacting/lockup only under load

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Dark Shade

[H]ard|Gawd
Joined
May 2, 2006
Messages
1,872
Okay, I've done a rather exhaustive search on Google and various forums including this one on this question:

Is there a difference between power usage and consumption between a PCI-E video card that uses a single molex power connection, and those who use a 6-pin PCI-E power connector? I've been having so many issues with my video card and one of the things I haven't been able to test with it is the power availability to the card. It uses a 4-pin style molex as the power injector. I'm pretty sure that the 4-pin molex have two grounds, a +12v rail and a +5v rail, and the PCI-E connector uses three +12v and three grounds.

auxpowerpciemolex.jpg


My video card problem is this: It runs fine when using the computer for menial tasks like browsing and stuff, but the moment it goes under load from a 3D game it will artifact, lines and all, within a matter of seconds. I haven't totally ruled out heat but the nVidia control panel AND speedfan both say the core doesn't reach over 60C, whether they are correct or not I cannot be certain, but evidence suggests heat isn't an issue. My other idea is power... maybe my molex isn't supplying enough power? If I bought a PCI-E to molex adapter (not the other way around) would I be supplying more power to my card?
 
An addition:

I just ran UT2004 for a little bit and it froze and artifacted to a lockup, and I logged my temps via speedfan

CPU - all four cores 50C (with the 15 degree addition)
GPU - 75C

75C is pretty standard for a GPU under load. Why am I freezing?
 
75C is...well, it's not BAD - some recent video cards push mid-80s with no issue (pretty much anything from ATI, actually), but...

I think the power supply would be a bigger question. What PSU are you running, and what is the amperage on the +12v line running to the video card?

Also - specifically, what card are you referring to? The 7800GT in your sig, or...???
 
dderidex said:
75C is...well, it's not BAD - some recent video cards push mid-80s with no issue (pretty much anything from ATI, actually), but...

I think the power supply would be a bigger question. What PSU are you running, and what is the amperage on the +12v line running to the video card?

Also - specifically, what card are you referring to? The 7800GT in your sig, or...???
Click to expand...

I'm running an OCZ 600W GameXSteam PSU, bought it a few weeks ago. It has four +12v rails with 18a each

Yeah I am referring to my 7800GT, which has the molex connector.
 
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