Power supply effecting graphic card performance

[silvan415]

I'm running a system using a Gigabyte GA-X58-USB 3, using an Intel Core i7 950 3.06ghz, using DDR3 8gb 1333Mhz ram. So here's the problem;
running a few programs, SecondLife and World of Warcraft, I get flickering rendering errors.

So here's the fix; I thought it had something to do with a new video card that I just purchased. It was a Geforce GTX 450. Talked to a tech support rep who suggested I send it back. Went out and bought an ATI Radeon HD 5770 - experience the same problem. The flickering happens only with Second Life, although I've seen rendering problems in World of Warcraft. Any ideas?

 

[rolli59]

What PSU?
Can be settings problem as well!

 

[dokk2]

Similar problem ,, different video cards check psu GTX 450 should have at least 600w psu [??]...I use OCZ Stealth X Stream because they can deliver 700w even though they are rated at 600w, check the review at Hardwaresecrets.com...

 

[rolli59]

Similar problem ,, different video cards check psu GTX 450 should have at least 600w psu [??]...I use OCZ Stealth X Stream because they can deliver 700w even though they are rated at 600w, check the review at Hardwaresecrets.com...

Post facts with statements like that! The below is borrowed from EVGA for GTS450 it is total available system power req.
"Requirements
Minimum of a 400 Watt power supply.
(Minimum recommended power supply with +12 Volt current rating of 22 Amps.) "
http://www.evga.com/products/moreinfo.asp?pn=01G-P3-1450-TR&pwindow=specs&family=&sw=
Total system load with GTS450 running Furmark 270watt http://www.anandtech.com/show/4221/nvidias-gtx-550-ti-coming-up-short-at-150/16