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First OC'ing attempt underway, critique me please!

post #1 of 9
Thread Starter 
I read over the great starting Ultimate Overclocking Guide by DeathoNator (thanks for providing that) and decided to start my first OC'ing attempt using the guide. So far, I basically just finished the first step of determining the max FSB on my mobo (i think). I was just wondering if I have done everything correctly so far, if the results make sense, and if I am ready to move on to the memory.

I started by bumping up the CPU Frequency setting in the BIOS and got up to 300Mhz before the system wouldn't boot into the OS. 299Mhz allowed me to boot into the OS but with errors. 295Mhz allowed it to boot fine, but gave errors after running Prime95 for 1 minute. I kept successively backing it down, but would get errors after up to 2 1/2 hours of torture testing.

Finally when I got down to 280Mhz I was able to run the torture test for 13 hours error free overnight. Chipset voltage was set at 1.6v (only other option is 1.5v) and I set CPU multiplier at 5x. I didnt change anything with the memory settings (memclock index value 400mhz and memory timing at 2T). Everything is basically set at default or auto value.

Does 280Mhz seem like a good value? I was planning on test the range between 280-284 as I made the jump down from there when 285Mhz gave an error after 2hr 5min of torture testing.

Next step I guess is to work with the memory. I was unsure though exactly which setting in the BIOS does the 'CPU/memory ratio' as specified in the guide.

Sorry for the long post. I am excited to start my first OCing experience though, and any help is appreciate. Thank you

-LC
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post #2 of 9
Thread Starter 
One other question, does it matter what setting I run the torture test on? I started running the 'Blended' test, but switched to the 'In-Place Large FTT's' as I assumed I am not testing memory at this point.
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post #3 of 9
Now it's time to look at OCing your RAM
Cut yout CPU multiplyer back by 2 or 3 so it won effect your RAM OCing ...
Find the stable RAM OC and with the two stable max OCs you will find the max of the 2 youw will be on the road to sucess!

Using the "Quick" method with memtest86 adds expediance to the process.
On on the memtest...check at the botton of the page on that
http://www.overclock.net/faqs/38169-...roduction.html
    
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post #4 of 9
Thread Starter 
Thanks for the tip. Now to make sure I understand you, when you say cut back the multiplier, am I actually going to want to increase it (to 8 or so), or decrease it further down than 5x (2-3)?
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post #5 of 9
nonono, keep your mutli at like 7x. raise the ram until you can't be stable anymore (which i think is what you were trying to do). 280 is just fine make sure you run enough voltage to your memory. now you want to start playing with your cpu, so lower your HTT down to 200 again, raise your cpu multi all the way up and start craking up on the HTT (set a ram divider so it doesn't mess w/ your CPU overclock). after you finish, find out where your CPU is stable and go to town.

I.E. my memory is stable running 270 HTT @ 1:1 ratio. but my proc is only stable running at 2.6 GHz, so i just have to take the bit of a loss and run @ 260 x 10 = 2.6 Ghz w/ DDR520 memory...ain't tooooo shabby. get it? equal medium of both proc and ram.
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post #6 of 9
Thread Starter 
I think I got it, thanks! I will do some more tweaking and see what I get!
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post #7 of 9
Thread Starter 
I am new to this, so I apologize for the ignorance. I am a little confused on the topic of the 'ram divider'. I assumed it was the ratio between the ram speed and the MB speed. However, I noticed my ram speed starts at 400Mhz default (I assume it is 2x 200mhz since it is dual channel) and goes up in 33Mhz increments. I was unable to find a separate ram divider or CPU/memory ratio as refered to in the guide.

I started the previous recommendation and only was able to get the MB speed up to 216Mhz without a reset or error in Prime95 occuring within the first minute. I also set the memory timings to 2-2-2-6 (down from 2.5-3-3-6 default) as well as upped the ram voltage to 2.8v

One other thing I noticed in my bios, is the memory settings (which are on a different page then the MB and CPU settings) seem to get set back to the AUTO mode when I make any changes to the MB/CPU page. Odd?

Thanks again for everyones help.
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post #8 of 9
raise your ram timings up. i don't know what yours run at @ stock speed, but there's only a few of them that'll go that low. try 2.5-3-3-7.

also its 2 x 200 because its DDR, not dual channel.

and you're on the right track on the dividers, but it should go down as well as up. it should go like 133, 166, 200, 216, 233, etc etc etc etc etc blah.... set it down to like 166 or even 133 when you're trying to find your max processor overclock.
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post #9 of 9
Thread Starter 
I seemed to have encountered an issue with my bios. It seems like when I set my memory settings to manual and make changes, my chipset settings will be set to auto. Even if I put them on manual, it appears that only one of these areas (memory or cpu/mobo) can be on manual. Also, if I make changes to my memory speed, it automatically sets my timings and I can't override them. Is this a limitation with the board (Asus A8N-SLI Premium), or is there some way to overide this.

I cranked my memory speed up to 466Mhz (and the bios overrides my manual settings on my chipset and automatically sets my FSB at 233Mhz) and was able to run stable in Prime95 for almost 7 hours. The next memory speed setting i can do is 500Mhz (266Mhz FSB) and the system quits after 1 minute of torture testing. Does this seem right? I cant refine the memory speed any further than that?

Thanks again for everyones help!
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