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a problem that's been bothering me about my 670

post #1 of 7
Thread Starter 
im using a 670ftw with a custom bios (letting me to increase my voltage to 1.212 and changing my default clocks and i changed from a lot of different bios's and the one im currently using is the best from me. most of you are familiar with these stuff probably more then me but im writing everything with detail as much as i can remember ^^. on with my point) from evga as my gpu precx 4.0 and heaven 4.0 as my benchmarking and overclocking software. my question is: my default clock is 1202 from the bios. my kepler boost is 143 if it matters or not im not sure. when i set my gpu clock offset to +47 for example i should get a clock speed of 1202+42=1244 but suprisingly i got 1241 i taught this was something to do with the weird kepler stuf and left it as it is. but later i wanted to go further so i started increasing and started crashing i said well i need to go slowly and started to increase my offset +2 at a time. so i did +44 but the problem starts now. my clock is supposed to be 1246 but it didnt it stayed 1241. my benchmark score was the same. by going 2 by 2 i went up to 50 but i still keep getting 1241 and the same score, why am i stuck at 1241 i dont understand. to test if this was a problem i went on and set my offset to +62 i got something higher then 1241 that crashed in the benchmark but i saw that i can go higher then 1241 at least. why am i stuck at 1241.
then i kept increasing 2 by 2 sometimes 1 and got to a point where i still got 1241 with 52 offset and 1254 with 53 offset which crashed in benchmark btw but with 53 offset i should get 1255 but instead i get 1254. anyone know anything about these kepler stuff pls let me know. and sorry for the block of text

TL;DR at some point my gpu clock doesnt change even if i increase my offset. why and how to fix this.
post #2 of 7
This is an error within PrecisionX. I've noticed that GPU-z ALWAYS shows correct clocks.

BTW, Your 670 will work with the unlocked gigabyte wf3 BIOS. I've noticed that it is more stable and I use it for both my wf3 and my ftw.
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post #3 of 7
Thread Starter 
thanks i will try that out. and also the bios
post #4 of 7
Thread Starter 
but the problem is when i increased my offset 2 by 2 before i got the 1254 clock while i was still getting 1241 i got the exact same benchmark score so if its a bug and if it just shows wrong and the actual gpu clock changes shouldnt the benchmark score also change
post #5 of 7
This called a "13 Mhz" margin of NVIDIA Driver. For example, now I run my card at 1280 Mhz with offset +132 (this must be a 1282) but it's only 1280, even I increase the offset into +137 (which is 1287), my core is still at 1280 BECAUSE It still didn't met the 13 Mhz margin. (my boost clock is only 1150 Mhz).

I must increase to +145 to get 1293 (+13 Mhz margin).

So this is a driver related, don't worry about it though, If you are worried TOO MUCH about it, then rollback to an old driver ( I recommended a 306.97 ) maybe your best choice though.

Hope you understand what I meant.
Edited by Sharchaster - 3/31/13 at 11:46am
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post #6 of 7
Thread Starter 
thank you for explaining this thing. i needed this ^_^ so i have to go up 13 by 13 xD. and erhm..... what happens when i rollback to an older driver. how does this fix the 13 thing
post #7 of 7
when you rollback to an old driver, you will get a better "core offset" control. For my card, if I set the offset into +132, my core will be 1282, I increase +2 will be 1284, etc...
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