overclocking and voltages

sureshkhirwadka

sureshkhirwadka

sureshkhirwadka

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Joined
4 Jan 2005
Posts
105
Hi guys, I'm fairly new to overclocking and want to O/C my CPU. Currently my setup is

Athlon 64 3000+
Abit AV8 3rd eye s939
1024 mb PC 4000 DDR RAM (unkown manufacturer)
Corsair water cooling for CPU

Basically, I want to O/C my CPU to its full potential, I'd hope for somewhere around a 3600+ speed or more, but I don't really know about upping voltages etc, when to do it, which voltages to up, and how much by - any help would be appreciated!

Oh yeah, current results so far are:
FSB 210, multiplier x9 (1890mhz) no voltage change
FSB 215, multiplier x8.5 (1827.5 mhz) no voltage change
FSB 220, multiplier x8.5 (1870 mhz) CPU voltage 1.45v

Thats about all I can seem to get without changing other voltages, or upping CPU even more.

Can anyone help me please?
 
yeah, i meant 3500+ sorry. Anyway, as far as BIOS options goes, it seems fairly limited (which is surprising considering its supposed to be a good overclocker!?). There doesn't seem to be an option to change HTT multipliers, and I can't seem to unlock the memory frequency either, only the timings.
 
ok, so i was being stupid, I just didn't see the options. HTT is under "LDT", and the DRAM clock thing was confusing me, I've got it sorted now. Just successfully loaded up windows at 230FSB x 8.5, HTTx4, DDR@333.

My next question is, how can I tell what speeds the DDR is actually running at, as it doesn't tell me actual speeds of the memory, it just says DDR 333. Is there some complication calculation between FSB and DDR speed? e.g FSB x 2 /(400/333)? which would make about 382.5mhz at the moment with the above speeds?
 
ok, so i was being stupid, I just didn't see the options. HTT is under "LDT", and the DRAM clock thing was confusing me, I've got it sorted now. Just successfully loaded up windows at 230FSB x 8.5, HTTx4, DDR@333.

My next question is, how can I tell what speeds the DDR is actually running at, as it doesn't tell me actual speeds of the memory, it just says DDR 333. Is there some complication calculation between FSB and DDR speed? e.g FSB x 2 /(400/333)? which would make about 382.5mhz at the moment with the above speeds?

Also, I haven't uped the cpu voltage yet, and its reading at around 1.4v still on my guru clock. How can you tell when you need to up the voltage to the components?
 
ok cool. well i've got a beefy corsair water cooling kit cooling it, and temps at load are usually around 48c, now currently at 43c idle, on 255fsb 8.5 multiplier. I'll try upping the multi to 9, see what happens.

cheers for all the help guys.
 
ok, an update. I have successfully booted and ran sisoft sandra cpu benchmarks successfully with:
FSB 300mhz
Multiplier x9 = 2700mhz effective (FX57 is 2.8ghz!)
HTT x3
CPU voltage 1.45v
DDR@266 (just under 390mhz effective), normal voltage.
Idle temp ~40c, load temp ~47c

If I keep upping the CPU voltage (within reason), should I expect to see the speed creep up to 3ghz? that would really impress me!

Also, as my ram chips are rated up to 250mhz (500mhz effective), if I up the ram voltages slightly, could I push more speed out of them and up the divider to 333? For some reason, once the ram chips go past 400mhz, the system won't boot, could this be insufficient voltage?

thanks for all your help guys
 
ok. well i was going to wait till the weekend till i have more time, and seriously stress test the CPU using all the benchmarking software i've got, just to check its all stable.

thanks for all the help guys, very much appreciated. I'll let you all know final results.
 
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