Low o'c

Geoff

Geoff

VIP Member
After getting my new system, i was able to get my cpu from 2ghz to 2.25Ghz (originally a 3200+). If I go higher than that, then the computer shows a black screen for 10 seconds, restarts, and the cpu speed is reset to stock. I tried raising the voltage from stock to 1.425, and also at 1.450 and i wasnt able to oc any higher. I also lowered my ram to DDR333 thinking that that was why, but same problem. And my cpu is running around 20C idle. Im also running an IDE hard drive, w/ no PCI cards and a PCI-E gfx card, but the PCI-E bus is locked.

Im thinking its the PSU since its only 20-pin and my mobo is a 24-pin, and its a cheapo 500W +12V@18A PSU. Im getting my Aspire 520W +12V@36A 24pin psu in a few days.

So do you think its because of the PSU? (the voltages are +/-.30V for everything). Or its the max my mobo can O'c?
 
Im thinking its the PSU since its only 20-pin and my mobo is a 24-pin, and its a cheapo 500W +12V@18A PSU. Im getting my Aspire 520W +12V@36A 24pin psu in a few days.
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I think your dead right
 
The PSU is a problem, but so could board. If you still cant get higher the board is probably the problem. Maybe you just have a crappy chip lol, like mine, but I would check those 2 things out first.

By the way have you try'd CPU startup value? Does the board even have a chance to POST? If not that might help because its the voltage applied before POST.
 
34erd said:
By the way have you try'd CPU startup value? Does the board even have a chance to POST? If not that might help because its the voltage applied before POST.
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Once i turn the computer on, the monitor stays black and the power L.E.D on my case flashes, then about 5-10seconds later it restarts and i hear a beep, and the cpu fsb is reset.
 
Have you made sure you lowered the HTT also? I think you are smart enough to have remembered to do that but I just wanted to make sure. HTTs are terrible things to overclock and can cause a lot of problems with overclocking. At any overclock below 260 mhz FSB you should lower the HTT multiplier to 4x. When you go above 260 FSB you should set it down to 3x multi. Your HTT is only made to run at 1000mhz at its max and it cant go much higher.
 
Actually i didnt even think of that, since i just moved to A64 i never had to deal with it. When i get home i'll try it, thanks!
 
Okay well i went into bios and set it to 4x, and didnt help, then set it at 3x and still didnt work. Im just giongn to wait till i get my new psu and see if thats the problem.
 
Well as i said before, i lowered my ram to DDR333, and since i overclocked it, the ram was around DDR385, but it still didnt work. And the guy who bought the same ram as me said he got his up to DDR520 without changing the voltage or timings.
 
you cant claim that a 3200+ is a 3500+... theyre physically different chips that process at different speeds, aside from the bus speeds.
a 3200+ at 2.2ghz doesnt run as fast (or cool) as a 3500+ at original clock speeds.
also, try lowering to ddr333, htt x4, and turn the ddr timings up until you try the overclock. dont raise the voltage TOO much because it creates alot of heat.
 
fade2green514 said:
you cant claim that a 3200+ is a 3500+... theyre physically different chips that process at different speeds, aside from the bus speeds.
a 3200+ at 2.2ghz doesnt run as fast (or cool) as a 3500+ at original clock speeds.
also, try lowering to ddr333, htt x4, and turn the ddr timings up until you try the overclock. dont raise the voltage TOO much because it creates alot of heat.
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Actually, it performs better since the bus is running faster than a 3500+ stock, and they have the same exact specs as a 3500+ Venice. And my cpu idles at 23C. my friends 3500+ idles at 32C.

I lowered the ram to DDR333 and the HTT to 3x, and it didnt work. Im just giong to wait until tomorrow when i get my new psu.
 
Actually, it performs better since the bus is running faster than a 3500+ stock, and they have the same exact specs as a 3500+ Venice
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Very true, my 3200 is at 2.6Ghz and mine is slightly ahead of the FX-55 in the Sandra arithmatic test but slightly lags in the multimeida test prolly due to the lower cache. I just love my SI-120 earlier today, it was really cold in my room and my SI-120 and Panaflo fan got my case temp down to 19C and CPU temp to 21C!!! This is idle of course.
 
gamerman4 said:
Very true, my 3200 is at 2.6Ghz and mine is slightly ahead of the FX-55 in the Sandra arithmatic test but slightly lags in the multimeida test prolly due to the lower cache. I just love my SI-120 earlier today, it was really cold in my room and my SI-120 and Panaflo fan got my case temp down to 19C and CPU temp to 21C!!! This is idle of course.
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Nice! Is your power supply 20-pin or 24-pin?
 
I have a 24 pin PSU with 15A and 14A on both 12V rails. 29A in all. It was about $70 at Circuit City. It is the Antec Smartpower 2.0 400Watt. I have overclocked all the way to 2.8Ghz but the temps were pretty high...
 
Ok, well i got my new PSU but i still cant o'c any higher. :( I got a new update for my BIOS and im about to flash it and see if that makes a difference, if it doesnt work then either the motherboard just wasnt meant to overclock that high, or the ram is pretty crappy.
 
Ok, well i did a BIOS flash and it allows me to get the cpu up to 2.3Ghz, but it wont load windows. And when i try to go back into the BIOS it always locks up, any suggestions?
 
You have 1GB of DDR440 and it wont overclock any higher than that? Try this, Lower HTT to 4x multi. Raise CPU FSB to 240(set TO this, nothing else yet). Set your memory divider to 166(333)Mhz (only this). Up your CPU voltage +.5V and RAM voltage just a tad higher than its stock. Keep your CPU multiplier at 10. Do NOT change any of the settings i've told you. If you do the calculation, the 240FSB and 10 multiplier on your CPU will put your RAM right at 200mhz (400mhz DDR). This should be perfect settings that should easily work if all goes well.

Your RAM might be the problem but I don't know why because I have crappy ValueRAM OCd to 433Mhz DDR with my CPU at 260 FSB with CPU voltage at 1.425. Maybe it is the motherboard though... I like getting from ASUS and Abit, very high quality mobos and no major problems from either.
 
Well i already did everything you said at once except i had the FSB at 230, so the memory was around 383. Im not positive on the stock memory voltage, but the lowes my mobo can go is 2.7, so i might try 2.8.

But it seems that whenever i touch the memory it doesnt go to post... we'll i'll try whta you said and check back soon. And the valueselect is better than what i have, i was about to get my fsb up to 253 on my sempron 2800+ with valueselect.
 
Ok well i did what you said, and i was able to overclock it and it showed 2.4Ghz in POST, but once the POST ended, it kept restarting. I guess this is the max i can do on my board w/ the ram i have. Once i get enough money im going to buy 2GB of XMS, hopefully that will allow me to overclock higher.
 
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