Trying to overclock but computer keeps freezing

khare

khare

khare

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26 Aug 2010
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South UK
As title. I keep trying to overclock by fine tuning CPU voltage and FSB, but whenever I clock, after some usage the computer will freeze (even though the numbers on my sidebar CPU meter will still be moving). I'm pretty convinced this is RAM related.

CPU-Z shows a FSB : DRAM ratio of 3:10, is that what's causing it to freeze? It freezes even if I use the default 7% overclock option rather than manually.

DRAM Frequency currently running at 669.7 MHz, this is all with the standard numbers.

AMD Athlon II X4 635
ASUS M4N68T mobo
4GB RAM 1333MHz

Khare
 
It just froze again, even though it's running standard setup...


Do you think it could be faulty RAM or a faulty graphics card?
 
PSU is EZcool Tornado 700W. The system is completely brand new NO LINKING TO COMPETITORS. Not overheating as temperatures are about 35C at idle and 63C at full load. System temp shows 26C. CPU is running 1.365 volts which is the standard amount.
 
GPU temperature is 36C at idle. I can't remember what it was at full load but it was reasonably low as well.

Card is XFX ATI Radeon HD 5770 1gb.
 
PSU is a crap el-cheapo brand, but i think it should be enough for whats in there.
I would take a stab at thats what is limiting your overclocking, but t shouldnt be freezing on stock.

what program are you using to fully load it? make a memtest CD and test the ram. If all goes well, download prime95 and run that for a few hours. Lets see what we're working with here.
 
Use memtest and prime95 to put load on it. When running prime95 on small FFT's it's fine and doesn't freeze, but when I run Blend test, it usually does freeze. Memtest found no problems, although I didn't run it for very long (about half an hour).

I've now lowered the FSB : DRAM ratio to 1:2 and upped the FSB to 215 keeping the voltage the same. Seems fine but I haven't ran any tests yet or any gaming.

DRAM Frequency is 430MHz at the moment, I don't really understand RAM so I don't know what it should be (dinopc said it was 1333MHz).

NB frequency is 2152MHZ, again I don't know what northbridge is or what it should be running at, but I read that cooling it helps although I'm not sure where on my motherboard NB is (there is one ASUS branded heatsink in what I think is the southbridge), it's just underneath the graphics card so I can't put a small fan on it or a bigger HS.
 
Something else I just noticed.

The HT Link is sitting at 1076MHz, and on other screenshots of CPU-Z of the same processor running standard values it's showing 2000MHz.
 
Hello khare,

You need to adjust the memory multiplier down from [10:3] to [8:3] otherwise when you overclock the Ht ref.Clock you will be pushing the memory frequency beyond its rated speed which it probably doesn't like! :)

200MHz HT Ref.Clock x 14.5 = 2900MHz Processor Frequency
200MHz HT Ref.Clock x 10/3 = 666MHz (DDR3-1333)


207MHz HT Ref.Clock x 14.5 = 3001.5MHz Processor Frequency
207MHz HT Ref.Clock x 10/3 = 690MHz (DDR3-1380)

am3stockmemory.gif


AMD® Athlon™ II Overclocking Thread
 
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Ok I'm on the laptop now, so I'm in desktop bios and Under memory timming and voltage I have memory clock mode [manual], memclock value [400MHz], DRAM timing mode [auto] and memory over voltage[auto]. Can't see any multiplier. Under CPU ration and voltage I have processor frequency multiplier which is set at 14.5, cpu/nb frequency [auto], HT over voltage[auto], cpu over voltage[auto], VDDNB over voltage [auto], loadline calibration[auto]....Not sure where the ram multiplier is...
 
got it in my hand now but doesn't show much info to be honest. Says all the options taht each thing gives me, but that shows up in the side of the bios anyway.
 
lowered memclock value to 400....You saying it should be 533 for it to be correct ratio??
I'm worried about NB frequency, should I lower CPU:NB frequency to x9?
 
I'm slowly understanding now haha. It's just a big game of mathematics that's what!

Ok,, so my question now is about NB frequency and about HT link speed. HT is 1000, there is no option on setting it, how do people change it to 2000 which is what it should be so I read...And NB frequency, what is something reasonable?
 
khare, I would just make a cup of tea/coffee and have a kit-kat (i.e slow down) :D

Just take your time and adjust one setting at a time and become familar with the BIOS and what the various settings do . . .

I've only ever clocked AMD® Athlon™ II using an AMD® chipset therefore I am unfamilar with your specific nVidia® motherboard. . .

Normally on a modern AMD® chipset the HT-Link is 2.0GHz (200x10) and the CPU-NB is 2.0GHz (200x10) . . . looking at a .pdf of your specific board I cannot see an adjustment for the HT-Link but thats ok as this will be adjusted down when you adjust down the CPU-NB . . . if you want to concentrate on just your CPU clock then lower the CPU-NB down to [x8] for the moment as this will allow you to raise the HT ref.Clock up to 250MHz without overclocking either the HT-Link/CPU-NB.
 
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:) Thanks Wayne. Right now I'm running 220 FSB with 1098 HT Link and 2195mhz NB, I'll keep playing with FSB for a while and lower the CPU-NB don to 8x :). I'll report back when I find more stuff. You've been awesome :D
 
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