Alright was able to Overclock the 4x 680 Classifieds. Out of the 4 I had 1 Golden one that went at or above 1300mhz. The rest of them are close but not close enough lol.
I OC'd each card to see what the capability of each card is and then ran QUAD SLI OC's to see if the single OC's were stable enough.
Reason being the CrossOVer Monitors I have are 2560x1440p. It's more demand in games then using the normal 1920x1080 monitors.
All test are done with PCI-E 3.0 enabled using nvidia's program that forces it.
Programs Used:
Precision-X
GPU-Z
Heaven Benchmark DX11.
In each OC 1 test is done in windowed mode using 800x600 resolution. This is to clear Heaven Benchmark to make sure there's no tearing or driver crashes. The next test is then done in Full screen using 2560x1440 resolution.
AA is also set to 4x for all these test. Necessarily running at 2560x1440 it is recommended to have AA OFF. I would definitely see a performance increase and probably lose nothing via quality if AA was off due to the sheer pixel density of the monitor. To the trained eyes we always see the minor differences when things are on or off. So I basically kept it minimal and enabled AA at the lowest option. New games will have FXAA and MXAA but for games that still run AA, 4x is enough.
1st GTX 680 Classified
Voltage: 1175
Power Target: 131
GPU Offset: +100
Mem Offset: +500
GPU Clock: 1254
Mem Clock: 3506
Idle Temp: 25c
Max Temp: 34c
Power Consumption: 80-90%
Windowed: (To view this at a larger size Right Click and select View Image)
Full Screen: (To view this at a larger size Right Click and select View Image)
2nd GTX 680 Classified
Voltage: 1175
Power Target: 131
GPU Offset: +100
Mem Offset: +500
GPU Clock: 1254
Mem Clock: 3506
Idle Temp: 26c
Max Temp: 34c
Power Consumption: 80-90%
Windowed: (To view this at a larger size Right Click and select View Image)
Full screen: (To view this at a larger size Right Click and select View Image)
3rd GTX 680 Classified
Voltage: 1175
Power Target: 131
GPU Offset: +100
Mem Offset: +500
GPU Clock: 1306
Mem Clock: 3506
Idle Temp: 27c
Max Temp: 37c
Power Consumption: 80-90%
Windowed: (To view this at a larger size Right Click and select View Image)
Full Screen: (To view this at a larger size Right Click and select View Image)
4th GTX 680 Classified
Voltage: 1175
Power Target: 131
GPU Offset: +90
Mem Offset: +500
GPU Clock: 1267
Mem Clock: 3506
Idle Temp: 25c
Max Temp: 35c
Power Consumption: 80-90%
Windowed: (To view this at a larger size Right Click and select View Image)
Full Screen: (To view this at a larger size Right Click and select View Image)
Now with SLI enabled for all the cards, I kept running into driver crashes with the above settings for each OC'd card. To get everything running smoothly I had to drop the GPU offset by 10 for 3 cards. Once I did that and Heaven ran all the way through.
4x SLI Enabled GTX 680 Classified's
Voltage: 1175
Power Target: 131
GPU Offset: +90
Mem Offset: +500
GPU Clock: 1241, 1241, 1297, 1261
Mem Clock: 3506, 3506, 3506, 3506
Idle Temp: 25c , 26c, 27c, 28c
Max Temp: 38c, 38c, 39c, 38c
Power Consumption: 60-80%
Windowed: (To view this at a larger size Right Click and select View Image)
Full Screen: (To view this at a larger size Right Click and select View Image)
That's it for now. The CPu and now GPU are OCed. I can still OC the classifieds with trhe evbot and achieve 1300mhz across the board. I definitely have the room for it due to such low temps for the gpus even on 100% load. I'll OC them for benchmark sake but for 24/7 gaming/operation the 1175V OC is good enough. Unless the OC is incredible which in my terms you start hitting LN2 land, the increase is too minimal to stress the cards and decrease life expectancy. Still debating but I will see what temps are like when I go over the 1175 mark.
Hope this helps other OCer's out there. I got 1 golden card out of the 4. Just gotta remember not all cards are made the same.
post edited by Cloudz00x - 2013/01/14 02:38:15
