Corsair 750TX + 9800GX2 problem

[rypter]

Hi there,

I have what I believe is a defective video card or a powersupply that cant support the system. I am currently experiencing constant crashing, bsods (nv4disp errors), multiple games that are crashing,major artifacting, refreshing problems. I am running a dual boot XP/XP 64. I have used numerous Nvidia drivers in both OSes with the same result. Every time I have used driver cleaner pro to remove the remnants of previous drivers. To verify that it was the video card I used a few methods. I ran fully memory check over 24 hours using memtest. I have run prime 95 and orthos to verify that the system is stable. FYI this is NOT overclocked. I have also tried various driver tweaks, hard setting multi threading and changing to a single gpu. To verify it wasnt a conflict I disabled onboard devices such as audio and network with no change.Once I swapped out the video card to and older model 7800GT the system hasnt reproduced any problems. Then i started thinking it may be the power supply.

After looking at the power supply output and the video card recommendations I am having a hard time determining if its a power supply issue or a defective graphics card. I am at my whits end and would really like to hear if someone is using a comparable system with out any problems. If someone with alot of knowledge on the subject of power supplies could answer I would really appreciate it. From the manufactures websites the specs required to run the 9800gx2 is 40 AMPs and the power supply has the current ratings of +3.3V@30A,+5V@28A,+12V@60A,-12V@0.8A,+5VSB@3.0A. Is this enough? system specs are in the SIG.

Thanks alot

 

[Quiksilver]

Sounds like defective card to me.

 

[rypter]

Well I have more to add. I have a buddy that has the same graphics card and his system works fine. I brought mine over to test and no issues at all. So it not a graphics card issue. That basically leaves a few things it could be. Power supply, bad ground or possibly cabling. I do have a case that uses a removable motherboard tray so maybe a grounding problem? I just replaced the power cord and changed upses. If anyone has any better ideas please let me know.

Thanks,
rypter

 

[Zap]

Welcome to the forums, rypter.

Have you tried to run it without the UPS in place?

 

[rypter]

Originally posted by: Zap
Welcome to the forums, rypter.

Have you tried to run it without the UPS in place?

Actually I just replaced the power cord and switched to a regular surge protector. Ill let you know the outcome.

 

[rypter]

Well, I have good news. I took the system off of UPS power and havent had a problem since. It seems something this simple was causing such deceptive behavior. I guess this should remind everyone to keep it simple then look at more advanced techniques. Thanks all that responded.

 

[Yellowbeard]

Glad to hear it was a simple solution. If you need to use a UPS, you'll need to use a high quality unit with a true sine wave output as opposed to a "stepped" or simulated sine wave.