Cant get x2 3800 to 2.5ghz.

Jimbo · 10 May 2006 at 14:24

I am quite new at overclocking but following help from another member of these forums I have managed to get a small oc out of my cpu. Its set at the following at the moment:

overclock mode - cpu, pci Asynch
cpu volts - 1.350v
mem clock - 133mhz (ddr 266)
cpu nb link speed - 800mhz
cpu freq 220 mhz

It runs fine at that, but I cant get it stable at 240 or 250 HTT in the bios, I have tried upping the volts to 1.4v.. any ideas?

melchy · 10 May 2006 at 14:27

You'll need more than 1.4v, mines at 1.475v i think. Make sure your cooling is good though

*edit* Noticed that its the Asrock, which limits your voltage options

Which bios are you using ?

Jimbo · 10 May 2006 at 14:33

Hi mate Im using the latest 1.80 bios which is supposed to be a good overclocking bios. I just re enabled the 1T command in the bios so maybe this is causing probs too? it passed memtest for 30 mins and prime 95 / super pi though, although that was @ HTT 220.

The system is crashing though when I try a HTT of 240 or 250 even at 1.4v. Its rock stable on 220 HTT and defualt volts.

My cooling is a freezer 64 and it seems to be doing a good job, the most I have seen is 45c full load.

keef · 10 May 2006 at 14:47

there are volt mods available for the asrock boards, they are easy, im new here so i dont know if they have been discussed before, i will try to dig you out a link. my asrock was stable to 270mhz after that there can be probs on some revision boards. try lowering your link speed as well.

keef · 10 May 2006 at 14:50

oh, and asrock boards dont like 1t! they can be pretty funny with memory!

Jimbo · 10 May 2006 at 15:11

Cheers guys, I will try lowering the link speed to 600mhz, and maybe try disabling 1T too.

keef · 10 May 2006 at 15:18

yeah, i would, let us know how it goes!,

sablabra · 10 May 2006 at 15:34

Disable c&q, it won't let you increase volt then. 2.5ghz on stock volt isn't something you can expect to be stable... Even though mine is

Jimbo · 10 May 2006 at 15:45

sablabra said:
Disable c&q, it won't let you increase volt then. 2.5ghz on stock volt isn't something you can expect to be stable... Even though mine is

Sorry but whats c&q?? I know 2.5ghz was prolly unrealistic at stock volts, but its still a no go at 1.4v so Im a bit dissapointed really.

A.N.Other · 10 May 2006 at 15:59

c&q = Cool'n'Quiet
AMD's auto temp control rubbish. There should be an option for it in the BIOS, and it should be disabled.

Some CPU's just wont go to 2500 without more than 1.4V. Mine does

but many don't ... look here. Have a read through of that thread. It's pretty long now, but you may find someone with a similar set-up in there.

Townlea · 10 May 2006 at 16:01

Air is safe for 1.55v with good cooling ... (F64 can handle my CPU at 2.8ghz fine and a lot of 3ghz opterons) so your ok for cooling... wack the volts to 1.45 and see how it goes

A.N.Other · 10 May 2006 at 16:07

Townlea said:
Air is safe for 1.55v with good cooling ... (F64 can handle my CPU at 2.8ghz fine and a lot of 3ghz opterons) so your ok for cooling... wack the volts to 1.45 and see how it goes

I wouldn't personally put much more than ~1.5V through mine without watercooling. You certainly shouldn't need 1.5 + to get to 2500 MHz - don't just bump it up.

Foehammer2003 · 10 May 2006 at 16:21

Jimbo said:
Cheers guys, I will try lowering the link speed to 600mhz, and maybe try disabling 1T too.

Hey dude i know naff all about OC'in too! But i did read a thread that the link speed shouldn't be higher than 600 unless your HTT is 250 or more, on our mobo! Using a x2 3800... so same situation! And you should not need more than 1.4v anyway, as someone above said (soz forgot name lol)

Jimbo · 10 May 2006 at 16:26

Yeah I was told 800mhz if freq is under 250 and 600mhz if its over 250, I have treid both to no avail.

A.N.Other · 10 May 2006 at 16:36

Jimbo said:
Yeah I was told 800mhz if freq is under 250 and 600mhz if its over 250, I have treid both to no avail.

That is what it should be. As a rule ...

HT Multi x FSB speed <= 1000

Obvious question but you are changing the right multiplier aren't you? It should be called the HT Multiplier or the LDT Multiplier.

Jimbo · 10 May 2006 at 16:48

Its just called the cpu frequency (MHZ) on my board, and I change it from 200 which is the default for my board to 220 for a overclock of 200 mhz and thats fine on default volts.

Anyway I disabled cool and quiet (was anyway) set cpu freq at 250, put cpu nb link at 600mhz, put mem at 2T and cpu volts at 1.4v

Still I get a crash in prime 95 telling me a hardware failure occured and it aborts the torture test. This is followed by a blue screen crash, irq_less_nor_eqaul and something about NV4_mini.sys

Maybe my cpu is a bad overclocker and 200mhz is all im going to get out of it.

This is what I have at the mo...

Anything above this and it crashes.

lee87 · 10 May 2006 at 17:02

Try lowering the NB-SB link speed to 600mhz aswell.

edit: doing this might affect performance, so i'd run some benchmarks if you overclock further to see if it's going slower than it was before.

Jimbo · 10 May 2006 at 17:12

I treid lowering the nb link speed to 600mhz mate. Thanks for the suggestion though.

Edit: oh sorry you said NB SB link speed.. thanks I'll try it.

keef · 10 May 2006 at 17:22

your htt setting is not the cpu frequency, you can adjust the htt on that board, it is in a different menu to all the other overclocking options though. i think that it is in cpu or memory config menu, it is on the left of the main bios. 3 options down or something, forgive me if i am wrong, im goin from memory here!