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New to overclocking, need some help and tips...

R

RTN3000

Junior Member
Hi, I'm basically a noob to overclocking, but I think I'm getting the hang of it...

I've OC'ed my system to 2457 mhz, ran prime95 torture test, got 4-5 mins, failed...

My system seems fine, runs 44c idle, 57c max underload, what should I do now...?


For some reason, after overclocking, my computer seems quieter and cooler then when it wasn't OC'ed...

Weird?
 
read Zebos overclocking guide. Since you failed prime95 in under 5 minutes...according to Zebo, you should now multiply that speed by .95 and try again. so 2457 * .95 = 2334. See if that is stable for ya. Also, you need to check out your ram to make sure you arn't overclocking it to something it can't handle.
 
Yeah I was using Zebo's guide to guide me, I got Prime95 to fail at 14 mins now at 2425 mhz...

So should I bring it down 2337 and Prime95 it again?

I haven't gotten into any other overclocking but the cpu, no ram OC'ing yet...

 
I ran Prime95 at 2425 mhz again, ran for 32 mins, errored on test 1 560000, 10k fft...

It seems stable, can anyone give any tips to overclock memory?
 
You might need more voltage, Newcastles (and any 130nm chip) need more voltage than 90nm chips.

The Hypertransport/LDT multiplier is the Hypertransport frequency divided by 200 (ie. 800/200 is 4). At 220 HTT/cpu clock you should set your hypertransport multiplier to 3 or so just to stay within AMD's socket 754 spec.

Your memory divider is set by the DRAM frequency setting in the bios. It could also be the DRAM:FSB(or HTT) ratio. Basically you need to try to keep your ram running within a few MHz from it's original spec. One last thing, try overclocking with less ram (use the 1GB module by itself or one of the 512MBs, for example) to see if that's what's holding you back.
 
Originally posted by: RTN3000
CPU volt is at 1.55v

Memory divider?
HT multiplier?
Click to expand...


If you don't know what a memory divider is, then your overclocking your memory and that value stuff can't handle it. Find the memory divider settings on your board, they usually are labeled "mem frequency" or something like that, and the settings should be like 200,166,133,100. Set it to 166.

HT multiplier settings are 1x,2x,3x,4x,5x. 5x is the default and you want to lower this to 4x, unless you get HTT over 250mhz then drop it to 3x.


These two settings are very important to successfull overclocking, read up some more.
 
Overclocking is pretty much one large experiment, so many variables. You should attempt to minimize the effects of changing one variable. While the cpu, might run, quite stable at any given overclocked frequency, memory, or the Hypertransport, may not.
The basics of overclocking have not really changed. More speed, usually means a kick higher in voltage. More memory modules, produce more load and more reflections on the memory bus, and hence the chance of more errors when OCing. Unmatched memory types, have the greatest POTENTIAL for errors, not always the case in practice. I have always backed off memory timings, very conservative, when trying to determine just what clock speed the cpu was stable at. Even though your temp readings appear OK, cooler is pretty much always better. Cases, with better EMI and RF shielding, also contribute to more stable, and higher OC's. Always experiment with the minimal of peripherals. Keep exstensive notes. Never install an Operating System while the CPU is Oced, install the OS at standard speed. Make small adjustments. My 2 cents, certain others have other opinions.
 
Some reason, my bios doesn't show my HT multiplier...
I know where its supposed to be, but none...

My memory is at stock, my bios shows its freq is only about 110 mhz, i'm using 3 sticks, 2x512 and 1x1024, should i remove one of the sticks, if so which one...

For the memory clocking, the settings it has is memory clock, and the timings. Memory clocking goes as low as 200mhz, what should I do...

Thankyou for the replies...
 
Does it show the HT Frequency? Check under CPU options, that's where mine is and I'm running the premium version of that board. If I'm not mistaken (and I may be) HT multi and HT Freq are the same things on these mobos.
 
Probably...

My father's machine, which is almost identical to mine has a HT ratio, mines doesn't, he has a 3700+ with same mobo...

I'm running prime95 at 2420 with upped volts to 1.6v, ran 10 tests straight, about 30 mins now...

Does a a8n-sli have a mem divider?
 
Remember, the memory controller sits on the cpu on AMD systems, (somebody tell me if they moved it recently). What this means is that the HyperTransport speed, does not have to be tied to memory. Different mobos, clock the HT at different speeds. Memory timings are there to be played with, as is the amount and type of memory you have installed. Their used to be a value called 'drive strength', or something similar for memory, which when you increased it allowed better memory access for multi-stick configs. Other than the now infamous RAMBUS, memory is left without any terminators, which allows reflections and generally cr@ppy signals on the bus. Mix in a fan, or other component generating/radiating some form of Electrical Noise and you have errors. When mobo makers change BIOS's sometimes they do this to fix problems, other times it allows manufacturing to procure cheaper parts which usually don't perform quite as well, but slight changes in the BIOS allow for timing adjustments, making the cheaper parts work just fine.
 
confusingcomputers- (or anyone else!) I read your reply at the top of the page.I'm new to overclocking too,so I'll be using that advice.I was just wondering.As far as the prime95, doesnt that shut everything down before anything bad happens? like it's fail safe? or do you have to watch temps and such. Also as far as temps, what's too high? I'm working with an A64 3000+ in an Abit AV8 mobo with a gig of ram.2 gigs when my roomate lets me steal his! haha.Thanks in advance for any responses!
 
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