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post #21 of 32
Quote:
Originally Posted by xyeLz View Post
So how should I know my limits? Should I stick to what most people have and go for like 2200? Or is that even too much? Or should I go for 2400? Help!!!
look for the performance drop. best will be with some score with benchmarks. for test, set for 2k, check score, set for 2100, check score, do that until you will get lower result then last time. then you will find your limit.
post #22 of 32
You should push your RAM as far as it can go. You can't damage it. Chances are you haven't tested it enough. 50,000 iterations are the suggested number, so give this a go:

"MemtestCL.exe" 768 50000

And be sure to run it concurrently on both GPUs.
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post #23 of 32
Thread Starter 
Quote:
Originally Posted by mymlan View Post
You should push your RAM as far as it can go. You can't damage it. Chances are you haven't tested it enough. 50,000 iterations are the suggested number, so give this a go:

"MemtestCL.exe" 768 50000

And be sure to run it concurrently on both GPUs.
I'm not quite sure how to test it for 50000 iterations. I just kinda open them both up and follow the instructions which basically say which GPU, 1 or 0, and then can they share the results, N or Y.
post #24 of 32
You need to run it with the command-line switch as I posted before:

"MemtestCL.exe" 768 50000

This will run 50000 iterations utilizing 768mb (exactly half) of your GDDR memory.
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post #25 of 32
Thread Starter 
How do I do that?

Sorry. <--- stupid.
post #26 of 32
Create a shortcut to the MemtestCL.exe. Right click, select properties. Go to the "Shortcut" tab and in the "Target" field is should list the install directory. At the end you should add "768 50000". If done correctly the target field should something look like this:

"C:/Program Files (x86)/memtestCL-1.00-windows/memtestCL.exe" 768 50000

The '768' represents the amount of RAM (in mb) that you want to test. I've found the GPU to reject the program if it takes more than 50%. The '50000' is obviously the number of iterations to run. I usually find any unstable memory to reveal itself after a few thousand iterations, but the official F@H site recommends 50k.
Edited by mymlan - 3/1/11 at 4:45pm
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post #27 of 32
Quote:
Originally Posted by mymlan View Post
You should push your RAM as far as it can go. You can't damage it. Chances are you haven't tested it enough. 50,000 iterations are the suggested number, so give this a go:

"MemtestCL.exe" 768 50000

And be sure to run it concurrently on both GPUs.
What you been smoking? Don't know about actual damage, but run it high too long it can start artifacting, & it may not do the same clocks error free again.
I have a couple cards with screwed up memory that weren't even modded...
    
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post #28 of 32
Quote:
Originally Posted by xyeLz View Post
How do I do that?

Sorry. <--- stupid.
You're only stupid, if you max it out like he said
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post #29 of 32
Huh, never had any problems with RAM clocking, but I've only gone through a few. Not to threadjack, but how is it that RAM can be damaged with unstable clocks? Assuming stock voltage, won't it just fail out and clear when it's powered down?

Another question, can this damage be suffered by CPUs and ordinary DRAM when clocked high even at safe voltages? You've got me worried now!
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post #30 of 32
Thread Starter 
Does anyone know if 2200mhz is too much?
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