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Not happy with SAPPHIRE Vapor-X 100352VXSR Radeon HD 7950 3GB thus far - Page 2

post #11 of 12
Well score doesnt take into account the resolution, graphics settings, etc.. so consider that. Higher resolution -> lower score.
post #12 of 12
Thread Starter 
Quote:
Originally Posted by glina View Post

Oh ok I see.

First of all - did you increase the power limit to +20%?
Second - which BIOS do you run ? The vapor-x has a switch on the pcb. The boost ios (blue LED on) is voltage locked. The other bios is not.
and third - do not go to 1.25V straight away. Work your way in small steps. Disable overdrive in Catalyst, reset the setting in Trixx, increase power limit to +20 and find your max core oc with this. Do not touch the memory clocks just yet. From that point increase the voltage in 25mV steps and OC. Typically each step will allow you ~25MHz more but this may vary.

Always monitor your temperatures in GPU-Z under load. In idle the card indeed runs 0.8V so this is allright.
Be careful with VRM temperatures - they increase a lot with increased core voltage.

You can use Furmark to quickly check for throttling and maximum temps. VRM temps of 100C in Furmark mean you will get ~85C peak in gaming and this is a good moment to stop overvolting any further.

Well, I was able to bring it up 1100/1500 with 1.15v playing Crysis 3, and haven't taken it any further yet. Temps look good and I think I got a bit ahead of myself by pushing the voltage a bit too much without verifying the stability of the core and memory clocks. Also brought my CPU to 4.3 so I don't know if that helped a bit. Trixx allows to change the voltage but doesn't keep the setting for long, are you experiencing this also? It seems afterburner allows the voltage to cap at your discretion and goes to the stock 0.8v at idle. I'm going to keep OCing and run more benchmarks.
Hillary
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Hillary
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Overclock.net › Forums › Graphics Cards › AMD/ATI › Not happy with SAPPHIRE Vapor-X 100352VXSR Radeon HD 7950 3GB thus far