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Gflops lower than expected?

post #1 of 15
Thread Starter 
I have recently been testing out some clocks on my sig rig with Linx and Intelburn test. I was inspired by this thread http://www.overclock.net/intel-cpus/...-2-prizes.html but unfortunately my findings have been a little dissapointing.

So far I have found that I am getting about 10 Gflops less than people with identical clock speeds (I know in real world performance this is negligable but it is still no fun to find your chip is performing less than others).

At 4.7Ghz mine is pulling around 95 Gflops but as you can see in the thread mentioned above people are achieving around 105 Gflops with the same clock speed. It is the same story when running with only 4 threads active or at different clock speeds. I seem to achieve 10 Gflops less than others.



Here is a bit info about what I am running and what I have tried:

Most components are only a couple of months old and I have hardly done any overclocking to this rig. Briefly had it at 5Ghz @ about 1.42 volts to see if it could do it. And it could. After that I backed it back down to 4.4Ghz @ 1.32 volts and its been there ever since.

I am using the latest LinX with AVX and I am running windows 7 64bit with service pack 1.

My overclock is stable with 20 runs of LinX.

I have tried disabling and shutting down everything I possibly can like disabling my internet and all uneccessary programs and services through task manager.

I have recently formatted and reinstalled windows so all drivers and windows its self is up to date. Latest BIOS as well.

I haven't messed with the RAM much but from what I can gather, higher RAM speed produces better results (correct me if I'm wrong). I am running at stock 1866Mhz and most people that have posted are running at 1600Mhz so I wouldnt have thought that was an issue. The better scores seem to have higher RAM speeds. Could be coincidence though.


I feel the chip its self is solid little processor. Not the best clocker but certainly not the worst. I just found it a little bit surprising to be lagging behind a bit. I am certainly no expert at this stuff so if anyone has any thoughts or suggestions then please let me know. Thanks.
Tevatron K
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Tevatron K
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post #2 of 15
Lower GFlops happened to me when I needed a little bit more vcore (happened especially on higher RAM amount)
Also unstable RAM makes it to score low GFlops.
Have you tried loosening timings or run it at 1600 to see how it scores?
Or give a bit more dram voltage and/or VTT(VCCIO) voltage?
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post #3 of 15
Thread Starter 
My overclock seems pretty stable but never the less I will try your suggestions.

Won't be tonight but I will get back to you with my findings tomorrow. Thanks.

Edit: I couldn't wait untill tomorrow.

I have up'd the vcore to 1.4v (If it was stable at 1.34v then this should be overkill). I have also loosened the timings slightly and lowered the speed to 1600mhz. Unfortunately this has made it worse. I am now getting 89 Gflops.
Edited by Jokah - 7/19/11 at 3:41pm
Tevatron K
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Tevatron K
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2600K @ 4.8ghz Z77 Sabertooth R9 290 8GB Samsung 30nm @ 1866mhz 
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M500 240GB SSD 3x 3TB HDD's Sony DRU-V200S Custom water cooling 
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post #4 of 15
Have you tried without HT?
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post #5 of 15
Thread Starter 
Yes I have. At 4.7Ghz I am getting about 115 Gflops with HT off. Fully disabled in the BIOS. Same result when with 8 threads and only 4 active in Linx.

Thats more like 15Gflops less than what people are getting. I have no idea what is causing this. I will continue my quest for a solution tomorrow. Thanks so far and keep them coming.
Edited by Jokah - 7/19/11 at 4:26pm
Tevatron K
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2600K @ 4.8ghz Z77 Sabertooth R9 290 8GB Samsung 30nm @ 1866mhz 
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M500 240GB SSD 3x 3TB HDD's Sony DRU-V200S Custom water cooling 
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Tevatron K
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CPUMotherboardGraphicsRAM
2600K @ 4.8ghz Z77 Sabertooth R9 290 8GB Samsung 30nm @ 1866mhz 
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M500 240GB SSD 3x 3TB HDD's Sony DRU-V200S Custom water cooling 
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post #6 of 15
Running 8 threads lowers the GFlops because it forces each core to process twice the amount of data.
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post #7 of 15
I also have system device's disabled like the serial ports, Hard drive ports you dont need, firewire, onboard sound and so on.

Disable all device's you dont need and try again.

@ 4,7ghz i get 106GFlops

You have 1,35Vcore on 4,7ghz... That seems a little bit lower then most people though not unheard. I need 1.39Vcore to make 4,7ghz run stable. Up you Vcore 1 or 2 steps and see if the GFlops increase
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post #8 of 15
thats weird for you guys. i get 124gflops with 4.5ghz and 1600 ram speed!
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post #9 of 15
Quote:
Originally Posted by soulxp View Post
thats weird for you guys. i get 124gflops with 4.5ghz and 1600 ram speed!
It's because you lack Hyperthreading
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The Wtfer
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post #10 of 15
thats true but just turn it off and you'll get gflops like mine
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My System
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