posted on Dec, 13 2011 @ 05:20 AM
reply to post by shiman
From what your describing it does sound like it could be a power supply issue. You said you have a 750watt power supply. However in my experience alot
of the cheaper low end brands have low amperage ratings for the 12v rail. Something you may want to check into is how many amps in can provide on the
12v rail (PCI-E 6 Pin or 6+2 Pin Connection). I myself have a MSI Geforce GTX 560TI Twin Frozr II that requires a minimum of a 500watt PSU, capable of
at least 40 amps on the 12v rail. This card hits around 350 watts under full load by itself.
Looking up the card your using I found the following for requirements:
"PCI Express based workstation with available x16 lane graphics slot
Connection to the system power supply (adapter included)
450-Watt power supply or greater (assumes fully loaded system)"
I have in the past with both Nvidia and ATI cards seen artifacting or incorrect characters displayed during post. Some were caused due to cheap and
inefficient power supplies that claimed high wattage but when load tested are actually much much less. Others were due to dirty pci-e slots or
overheating, and in one case of a 6870 radeon recently, it was discovered that the PCI-e interconnect was actually missing an entire contact, which
caused some weird effects on the screen during boot clear through OS load.
What brand/model of power supply are you using, and do you know what the 12v rail amperage rating is? Granted as I stated before my personal video
card is a gaming card and as such requires a hefty power supply, but even these workstation type cards can draw alot. You stated it worked fine in
another system. What were the PSU specs on it, do you know?
I build custom gaming and 3D gaming design/programming systems for people all the time. Been doing it for about 12 years now. I've seen this sort of
thing happen many times. Just really sounds like a PSU issue to me. And even if you do have a nice psu with good amperage on the 12v rail, its still
possible it may have some type of problem on the 12v PCI-E power connector rail itself. If you have another PSU you could test with, I would
recommend trying that first.
Will continue to follow this post.