overclocking advice for noob :)

samscales

samscales

samscales

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26 Sep 2005
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This is my first attempt at overclocking.
My chip = AMD 3700+ San diago 2.2mhz

I have run 2 tests so far.
Test1, I got up to FSB/HTT of 315mhz with multiplyer of X5. = 1575mhz
Test2, I got up to FSB/HTT of 233mhz with multiplyer of X11. = 2563mhz

Obviously test 2 overclocks fasted, but on most forums they advise using a slightly lower multiplyer Why? when in my test the higher multiplyer is best.
 
samscales said:
This is my first attempt at overclocking.
My chip = AMD 3700+ San diago 2.2mhz

I have run 2 tests so far.
Test1, I got up to FSB/HTT of 315mhz with multiplyer of X5. = 1575mhz
Test2, I got up to FSB/HTT of 233mhz with multiplyer of X11. = 2563mhz

Obviously test 2 overclocks fasted, but on most forums they advise using a slightly lower multiplyer Why? when in my test the higher multiplyer is best.
Click to expand...

A lower multi used to be best on XPs and pentiums as it increases bandwith, but on A64s keep it highest as they dont need the bandwith as much.

If the HTT is lower there isnt as much stress on the cpu and mobo so the clock should be more stable.

As for your tests, with the first one it is your mobo that is the limiting factor, as with test 2 the limiing factor is your cpu (limiting factor = componnent that gives up first) assuming youve changed all the other required vairiables
 
Thanks for help.
I now have basic idea for overclocking the cpu but the memory is really doing my head in. I have read loads of forum posts and just don't get it. Hopfully if I post all my settings somone can give me some pointers.

FSB/HTT = 233mhz
multiplyer = X11
Cpu = 2563mhz
HT = X4

Memory is cheap GEIL 2mb pc3200 400mhz (2X1mb)
memlock = 333mhz (was 400mhz but was informed to turn it down, should I put it back to 400?)
1T/2T = 1T (was 2T)
CAS latency (TCL) = 3
Min RAS (TRAS) = 8T
RAS to CAS (TRCD) = 4T
Row pre charge (TRP) = 4
Row cycle (TRC) = 11T
Row cyc (TRFC) = 14T
Read write (TRWT) = 5T
Write recover (TWR) = 3T

Not sure if any other info is needed.

Thanks
 
Last edited:
What speed is the memory currently running at, CPU Z will tell you? Change it back to 1T, I assume the memory is underclocked at the moment so you will be able to tighten up the timings, your current timings are very loose at 3-4-4-8, you should be able to change these to 2.5-3-3-7 with your memory, remember to run memtest from the floppy/cd before you boot into windows.
 
Yes your memory (DDR400) is designed to run at 200mhz (400 effective), as you say it is currently running at 182, this is under 200. You have various options, you can try and overclock further which will in turn up your memory speed, you can use a different divider, this probably wont work unless you have a DFI board as they have more dividers, dont use the 200 divider as your memory will have to run at 233 at very loose timings. Alternatively you can equal the same overclock of 2563mhz using 244*10.5 , this will make your memory run at 197mhz.
 
:) Fantastic :)

I have set mem @ 2.5-3-3-7
I changed over to 244*10.5 , which makes memory run at 197mhz.

just running Prime95 as I type.

I have 1 last question (promise). What was the maths used to get at 244X10.5 197mhz?
 
oops :confused:

System just failed prime95 test after 10mins.

Probably a memory hitch, but would like to turn the fsb/htt down 1 or 2mhz first or will this mess other settings?

A64MemFreq - very handy.....
 
Mikey1280 said:
What speed is the memory currently running at, CPU Z will tell you? Change it back to 1T, I assume the memory is underclocked at the moment so you will be able to tighten up the timings, your current timings are very loose at 3-4-4-8, you should be able to change these to 2.5-3-3-7 with your memory, remember to run memtest from the floppy/cd before you boot into windows.
Click to expand...

Hi there, what does this mean 2.5-3-3-7, what does it correspond to in the memory timings? I take it 2.5 is the CAS latency, but what are the others?

Sorry if this is a thread hijack, but this thread is helping me with my own overclock.
 
Thanks for your help mikey1280 & hi 2bullish :)

I have just put fsb/htt down to 242 and running primatest

As you requested my volts are stock. cpu = 1.4 mem = 2.6
 
Mikey1280 said:
2.5 is the CAS latency
3 is the RAS to CAS delay
3 is the RAS precharge
7 is the cycle time (Tras)

These are from CPU Z
Click to expand...

Are the other timings important such as "Bank cycle time" and "DRAM idle time"?

Hi Sam, hope im asking questions that help u also
 
If you dont pass prime again then wack the voltage up a little, to 1.425, if it still doesnt pass go 1.45, what cooler do you have? On good air you can go upto 1.55v.
 
Mikey1280 - I am just on fan that came with cpu, but temps are looking good at 48ish under load. hay starting to sound not so noobish.

2bullish - those mem settings might be asus specific as I cant see them on my friends board, but will be worth finding out at some point.
 
48 is alright but I wouldnt like my chip going that high with stock volts. You should invest in a new cooler, an arctic cooling freezer 64 pro or a scythe ninja if you have the money would be an excellent choice.
Those timings arent Asus specific as I dont have an asus board, manufacturers sometimes give them different names though.
 
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