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Gflops lower than expected? - Page 2

post #11 of 15
Quote:
Originally Posted by soulxp View Post
thats true but just turn it off and you'll get gflops like mine
Defeats the purpose of paying the extra $100 or so
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The Wtfer
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post #12 of 15
oops double post
Edited by j.col - 7/20/11 at 2:38am
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post #13 of 15
you will get higher gflops if you enter a custom amount of ram

to run intel burn test (or Linx) properly. close down ALL running programs inc. antivirus, internet, etc..

before running, open task manager and see the amount of 'free' ram under the performance tab.
for example i have 2550mb free ram so in IBT i enter a custom amount of 2500. (just below the free amount)
then i change the threads from auto to 4 (quad core), i have a quad core.
now every run i make i always get around 40-42 gflops. (consistent) (sorry glflops are a good indicator on how fast your cpu is running, i can get around 40gflops, but in a test if i was getting only 20 then the test is not running properly)

" I would choose 'free' memory as available memory will also make use of cache memory which must be storing data for other applications aswell. Windows may free up some physical memory from the cached memory during testing but not totally and i think the rest will be the virtual memory as a compensation.

Available = Free + (Cached - Modified)"

running just free memory will help you get higher gflops, as its just using free ram and not cached ram
this should also have 4 or 2 cores running at 100%"

this will give you more consistent gflops score, but will also make your temps higher, as more gflops, the more the cpu is stressed"

full details here http://www.overclock.net/intel-cpus/...test-linx.html

also make sure you have windows 7 sp1 installed to take advantage of AVX
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post #14 of 15
Thread Starter 
First of all I would like to thank everyone for there advice. I have found a solution to my problem but I dont fully understand why it has helped. I will explain below and maybe someone can shed some light on the situation.

My previous tests were run with 4gb of memory installed in my rig. I have now added another 4gb to bring the total up to 8gb and I am now achieveing the results I was after. I now get roughly 107 gflops at 4.7ghz.

What I didn't make clear initially was that the test has to be run with 3072mb to enter the competition previously mentioned in my first post. There are two catagories. 8 thread test and 4 thread test. I am trying for 8 thread as 4 thread has stiff competition. I have service pack 1, I have the correct Linx and my overclock is rock solid at 4.7ghz with 1.34v. I tried 1.4v as people suggested just incase but made no difference. I upped dram volts as well just to be sure but no difference.

Now when I ran with just 4gb I did as people suggested and shut down, disabled and turned off every single component and software in the BIOS and OS that I wasnt using. Hard drives, disk drives, Ethernet controlers, anti-virus, spyware internet, you name it. If it wasn't in use, it wasn't on. I went through task manger and did the same with processes and services.

Now in task manager, before performing the Linx run with 3072mb, I could see that I had about 3200mb of free mem. Do you think I was been hindered by what J.col said.

Quote:
Windows may free up some physical memory from the cached memory during testing but not totally and i think the rest will be the virtual memory as a compensation.

Available = Free + (Cached - Modified)
To me this would seem like the case but what seems strange is how other people were able to achieve good results at 3072mb with just 4gb installed and I needed to install 8gb?

I am happy my problem is solved but I would just like to have a better understanding of why most people were getting 10 gflops more than me with just 4gb of memory installed while running Linx with 3072mb of memory? Thanks again everyone.
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Tevatron K
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post #15 of 15
Quote:
Originally Posted by Jokah View Post
First of all I would like to thank everyone for there advice. I have found a solution to my problem but I dont fully understand why it has helped. I will explain below and maybe someone can shed some light on the situation.

My previous tests were run with 4gb of memory installed in my rig. I have now added another 4gb to bring the total up to 8gb and I am now achieveing the results I was after. I now get roughly 107 gflops at 4.7ghz.

What I didn't make clear initially was that the test has to be run with 3072mb to enter the competition previously mentioned in my first post. There are two catagories. 8 thread test and 4 thread test. I am trying for 8 thread as 4 thread has stiff competition. I have service pack 1, I have the correct Linx and my overclock is rock solid at 4.7ghz with 1.34v. I tried 1.4v as people suggested just incase but made no difference. I upped dram volts as well just to be sure but no difference.

Now when I ran with just 4gb I did as people suggested and shut down, disabled and turned off every single component and software in the BIOS and OS that I wasnt using. Hard drives, disk drives, Ethernet controlers, anti-virus, spyware internet, you name it. If it wasn't in use, it wasn't on. I went through task manger and did the same with processes and services.

Now in task manager, before performing the Linx run with 3072mb, I could see that I had about 3200mb of free mem. Do you think I was been hindered by what J.col said.



To me this would seem like the case but what seems strange is how other people were able to achieve good results at 3072mb with just 4gb installed and I needed to install 8gb?

I am happy my problem is solved but I would just like to have a better understanding of why most people were getting 10 gflops more than me with just 4gb of memory installed while running Linx with 3072mb of memory? Thanks again everyone.


I noticed the same way also when running linpack with Magnycours 6173 x 2 and 24GB of RAM I am only getting 165-170. But I When added more RAM total of 32GB I am getting 180-185 Gflops.
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Athena
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