AMD 6400+ Overclocking HELP, got Pictures of my BIOS.

telefanatic

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Jan 10, 2008
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In need of your guys help in OC'ing my CPU , i have a AMD X2 6400+ Black Edition and im also using Thermalright Ultra 120 Extreme with a TT Armor case with ASUS M2N32 SLI Deluxe mobo . Whenever i try to OC the system i get a blue screen saying "System Service Exception" ? I have read the guides but still cant figure out what the problem might be. Can some one guide me by those pictures im including in the link ? Any help will be greatly apreciated ! Here is the link http://s273.photobucket.com/al...40/telefanatic_andrey/


Edit: Im also using 4 Gig of Mushkin pc2-6400 800mhz ram and Windows Vista Ultimate 64bit and i have a 850W PSU.
 

Sylvanas

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Jan 20, 2004
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Well for starters you want to make sure all your voltages are in check if you are getting instability. Your memory should be running at its rated voltage- depending on what it is that can change, for instance Crucial Ballistix has 2.2v rated voltage so thats what you should be running it at, if you are running at 1.9v 800mhz+ as one of your pics suggests then you might want to change that. Additionally if you are Overclocking by raising the HTT then you will also need to raise the HT link voltage (should be in BIOS) and if it is going above 1000mhz (HTT frequency x HT multiplier- yours is set to auto most likely 5x) you will likely get some instability, its best to keep this between 800-100mhz. I am not familiar with the standard Vcore for OC's on the 6400 BE as I think its a 90nm based CPU and my 5000+ BE is 65nm so they have different Vcore's however I've seen that 1.4v-1.5v has been fine as long as your load temps are in check (with a TR120E I'd say they should be around 50c tops?).

Given that you have a Black edition if you haven't already the best way to go about it is to start at stock settings, raise memory voltage, set cas timings manually, then just simply raise the multiplier- load windows, run Prime 95 and if its fine raise multiplier again rinse and repeat until you hit instability then simply raise the Vcore. This way you are not stressing the HT bus by going above 1000mhz (a cause for possible problems) and keeping the memory at its rated speeds so you eliminate 2 factors that lead to instability, and all that remains is the CPU which would just require a higher Vcore.
 

telefanatic

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Jan 10, 2008
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My multiplier is set to 16X ? Why is that ? If i go any lower say 15X my system runs at 3.0Ghz ? Also is there a way for my to unlink my RAM from CPU ?
 

Sylvanas

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Jan 20, 2004
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Originally posted by: telefanatic
My multiplier is set to 16X ? Why is that ? If i go any lower say 15X my system runs at 3.0Ghz ? Also is there a way for my to unlink my RAM from CPU ?

Download CPU-Z frome here and that will tell you your multiplier and other valuable info. The multiplier is set in the bios and if in your case it's set to 16 then that means 16xHT frequency= core speed. So for instance if your HT frequency is 200, then thats 16x200= 3200mhz. So yes dropping your CPU multiplier to 15 would result in 3ghz (200x15=3000).

And no your Ram always runs in a certain ratio to what your CPU is. A64's are quite different when it comes to this, there are many 'dividers' that are used to determine RAM frequency. These are explained here and can be seen in more depth here.
 

Sylvanas

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Jan 20, 2004
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Originally posted by: telefanatic
Also i just check the site for the right voltage of my ram it says its 1.8V ? Dont know why my mobo has it at 1.9V ? Should i change it ? http://www.newegg.com/Product/...x?Item=N82E16820146118 thats the link to the description of the ram.

It's Generally accepted that it's okay to run DDR2 @ 2.1v however in some cases that can void your warranty so you'll have to check with your manufacturer, in this case Mushkin (your memory should be on their site). All DDR2 is rated to be operational at 1.8v however some require more than that to reach their rated speeds (as most DDR2 built today is just factory overclocked from the 1.8v standard).
 

telefanatic

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Jan 10, 2008
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By raising the FSB and Vcore ? Since the multiplier is at 16X ? Also by looking at my BIOS i cant seem to find the Vcore voltage is it CPU Voltage ?
 

Sylvanas

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Jan 20, 2004
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Vcore is the CPU voltage, yes. I'd start at stock which means going into bios and 'Load optimized defaults'. After you load windows, note what CPU-Z tells you your multiplier, Ht frequency, CPU Vcore and memory speed are then go back into the BIOS- set Memory to 2.1v depending on what the max the Manufacturer rates it at (note overlcocking at your own expense) set memory ratio to 1:2 make sure HT frequency is 200 and then raise the CPU multiplier by 1, enter windows run Prime95- if its stable 2 hours go back into bios and raise the multiplier again etc. When you hit a wall its time to Increase CPU voltage.
 

Sylvanas

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Jan 20, 2004
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Link doesn't work, google some 6400+ results I think most people are getting around 3.4ghz.