Sometime this past May (2013) I purchased a Sapphire Radeon HD 7770 GHz Edition 1GB Vapor-X for my rig. I tried overclocking it pretty much immediately and the boost I was seeing was less than satisfactory, but I didn't know any better so I stuck it at 1200/1400 and left it that way.
Since then I've replaced my motherboard and processor and the max OC on the card has actually decreased. I can no longer play games stably at those clocks. If I was to try and play a game right now with those old clocks I'm quite sure it would crash in minutes if not seconds, regardless of the maxed 1.300V set in Trixx. After checking HWMonitor, the card doesn't even hit that voltage. It sits still at 1.275. I've had problems with vdroop in the past (same PSU, two different motherboards) and I've still been able to overclock both CPU's just fine with some fine tuning and load line control. Can vdroop also affect GPUs?
The PSU I'm using seems to be generic but last I checked it was rated at 500W. One final note... The PSU was taken from another build. It was taken from my Dad's old gaming computer... My Dad is 50 now... He had an ATI GPU in there with an AGP connection. I'm not sure how old that could make this thing but I'm more than willing to accept that it needs to be replaced.
Since then I've replaced my motherboard and processor and the max OC on the card has actually decreased. I can no longer play games stably at those clocks. If I was to try and play a game right now with those old clocks I'm quite sure it would crash in minutes if not seconds, regardless of the maxed 1.300V set in Trixx. After checking HWMonitor, the card doesn't even hit that voltage. It sits still at 1.275. I've had problems with vdroop in the past (same PSU, two different motherboards) and I've still been able to overclock both CPU's just fine with some fine tuning and load line control. Can vdroop also affect GPUs?
The PSU I'm using seems to be generic but last I checked it was rated at 500W. One final note... The PSU was taken from another build. It was taken from my Dad's old gaming computer... My Dad is 50 now... He had an ATI GPU in there with an AGP connection. I'm not sure how old that could make this thing but I'm more than willing to accept that it needs to be replaced.
Facebook
Twitter
Instagram