Message boards :
Number crunching :
2 or 3 WU's On A GTX 470
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Author | Message |
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Saaby900T Send message Joined: 24 Dec 10 Posts: 76 Credit: 4,971,171 RAC: 0 |
What is the number of WU to run to max out RAC? Also I've tried the search button so none of that crap plz. I couldn't find a thread that gave a solid answer. |
-= Vyper =- Send message Joined: 5 Sep 99 Posts: 1652 Credit: 1,065,191,981 RAC: 2,537 |
There is no definite answer to this one. But we can presume this would be the most accurate, run 2 WU's if you run the card at stock clocks and if you OC your graphics card you can try to run 3 Wu's. What you can test if you are into OC'ing is to see if PCI-E speed has a remarkable impact on crunching speed. For instance if you run three WU's at once in a OC configuration on the 470 you would perhaps get around 23 to 24 minutes for a bunch of 0.4x AR wu's.. Then go to the bios and try to set PCI-E speed to 110 Mhz instead of 100 (Don't set it much higher than that) and see if you lower your times to perhaps 22,3 - 23,3 minutes for the same 0.4x AR wu's.. If the difference is negliable then set it back to 100 because then you've made a proof of concept test that shows that setting the PCI-E speed gives you a speed boost to the GPU operations or perhaps not. Hope you get some ideas of direction for a better throughput. Kind regards Vyper _________________________________________________________________________ Addicted to SETI crunching! Founder of GPU Users Group |
Saaby900T Send message Joined: 24 Dec 10 Posts: 76 Credit: 4,971,171 RAC: 0 |
There is no definite answer to this one. Well I have a pretty Good OC going on it. 780/1560/1780 core/shader/Mem. I've never thought about adjusting the PCI-E bandwidth. Thanks for that hint. Well right now 2 wu seems to be a 7.5min a WU and 3 seem to at 7.6 min a WU but I've only be running 3 for an hour or 2. |
Kevin Olley Send message Joined: 3 Aug 99 Posts: 906 Credit: 261,085,289 RAC: 572 |
What is the number of WU to run to max out RAC? The last time that I checked I was crunching more WU's over a fixed period of time when running 3 WU's per card, drivers can also have an affect on processing speed. What I have not checked but have noticed that since upgrading this machine the speed of my CPU WU's has been affected, my CPU is processing less work because of increased demand from GPU's. Kevin Kevin |
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