X2 Overclock advice?

strelly · 4 Jul 2007 at 23:46

Hey, i have recently upgraded from a A64 3200+(Venice) to a X2 3800+ (Toledo).

I been researching and experimenting with overclocking the new chip having never overclocked the previous ones.

That is my attempt so far, i would like to push it to around 2500 MHz, but it has been unstable when trying.

At 2320MHz its perfectly stable, and have had no problems in the last 24 hours of use(including an hour of Orthos).

What would be a good route to take as increasing the Bus speed any more seems to lead to instability!

Spec:

X2 3800+
A8N-SLI Deluxe
2 x Crucial 512MB DDR 400MHz/PC3200 CL3 2.5V
6600gt

Idle temp of CPU is around 27-32 degrees

Thanks

Charlie

Mattus · 4 Jul 2007 at 23:48

Increase CPU vCore to 1.45v and try again.

If your HTT multiplier is set to 5x (1000MHz) then you need to lower it to 4x.
(edit) Forget that, can see from screenie that it's on 4x.

strelly · 5 Jul 2007 at 00:04

Thanks for that, Have upped the vcore to 1.45.

Core temp states its now 1.35v

Cpuz states it is 1.472v

Now the voltage is up can i resume increasing the FSB?

Thanks again

helmutcheese · 5 Jul 2007 at 00:07

CPUZ read my volts and many others users wrong.

Mattus · 5 Jul 2007 at 00:11

strelly said:
Now the voltage is up can i resume increasing the FSB?

Yup. CPU-Z's generally pretty accurate with voltage on AMD CPUs.

Core Temp is giving your VID, which is like the base CPU vCore - not always the same as your actual voltage as some mobos raise the volts by adding a certain amount to the VID, ie. 1.35v + 0.1v.

strelly · 5 Jul 2007 at 00:32

Mattus said:
Yup. CPU-Z's generally pretty accurate with voltage on AMD CPUs.

Core Temp is giving your VID, which is like the base CPU vCore - not always the same as your actual voltage as some mobos raise the volts by adding a certain amount to the VID, ie. 1.35v + 0.1v.

Excellent!

Windows booted up fine with 2500mhz, but Orthos stopped after a minute with an error.

Now at 2400mhz to play it safe, seems fine so far. Will see how it goes overnight.

Thanks for all the help!

Modjo · 5 Jul 2007 at 01:38

Lot of ppl buying the 939 +3800 recently..is it the bargain due to the bargain price of around £40 at the mo....?

Got good clocking off my +3800. Has been clocked to 2700 but it didn't like the Orthos test! :eek:

jaykay · 5 Jul 2007 at 11:23

Ive justr got mine, booted straight into 2.3ghz. Ill be pushing this much higher.
Edit at 2.6ghz with stock volts.
Edit at 2.7ghz with 1.392 volts.

El Jimben · 5 Jul 2007 at 21:56

strelly said:
Excellent!

Windows booted up fine with 2500mhz, but Orthos stopped after a minute with an error.

Now at 2400mhz to play it safe, seems fine so far. Will see how it goes overnight.

Thanks for all the help!

What RAM have you got mate? You might be overclocking that too hence Orthos failing after not very long. Post a pic of the SPD tab from CPUZ if u can. I would also say that 1.45v is probably too much for only a 400MHz overclock unless you have a really bad stepping chip. I'd try lowering it and then go higher if you need to, not the other way around.

strelly · 5 Jul 2007 at 23:43

El Jimben said:
What RAM have you got mate? You might be overclocking that too hence Orthos failing after not very long. Post a pic of the SPD tab from CPUZ if u can. I would also say that 1.45v is probably too much for only a 400MHz overclock unless you have a really bad stepping chip. I'd try lowering it and then go higher if you need to, not the other way around.

Screenie:

RAM is Crucial 512MB DDR 400MHz/PC3200 CL3 2.5V, bought it about 2.5 years ago.

The only thing i havent got my head around is the RAM timings etc..

I do agree its the ram causing the poor overclock.

The ram is set at 2.6v on bios, havent changed anything else on the ram.

Sorry to be a noob, but could you tell more about the stepping chip?

I am tempted to buy new/more/better RAM soon, as that is quite basic!

Cheers guys!

Amonlym · 7 Jul 2007 at 02:52

that rams probably based on 5B-F or 5B-D (single sided) or 5B-G (double sided) chips, can you take a shot of the sticks themselfs with clear view of writing on the mem chips?

if it is one of the above, drop the cas rating to 3 and it should do atleast 250mhz if you feed 2.7 to 2.8v. but will run hot.

if it turns out to be 5B-G you might manage 2.5-2-2-6 @2.8v @ 250mhz (if your lucky)

all the above are the same chips as on the ballistix line, and its known to pop up on all the crucial moduals from time to time

strelly · 7 Jul 2007 at 08:49

Amonlym said:
that rams probably based on 5B-F or 5B-D (single sided) or 5B-G (double sided) chips, can you take a shot of the sticks themselfs with clear view of writing on the mem chips?

if it is one of the above, drop the cas rating to 3 and it should do atleast 250mhz if you feed 2.7 to 2.8v. but will run hot.

if it turns out to be 5B-G you might manage 2.5-2-2-6 @2.8v @ 250mhz (if your lucky)

all the above are the same chips as on the ballistix line, and its known to pop up on all the crucial moduals from time to time

If that is the wrong pic then its no problem taking more!

cheers!

paradigm · 7 Jul 2007 at 10:01

Need to see the text thats actually on one of the individual chips

Will help in determining what type of chips they are

El Jimben · 7 Jul 2007 at 11:22

Amonlym said:
that rams probably based on 5B-F or 5B-D (single sided) or 5B-G (double sided) chips, can you take a shot of the sticks themselfs with clear view of writing on the mem chips?

if it is one of the above, drop the cas rating to 3 and it should do atleast 250mhz if you feed 2.7 to 2.8v. but will run hot.

if it turns out to be 5B-G you might manage 2.5-2-2-6 @2.8v @ 250mhz (if your lucky)

all the above are the same chips as on the ballistix line, and its known to pop up on all the crucial moduals from time to time

His RAM is already running @ CAS 3. Don't worry too much about the timings, you just need to pur your RAM on a 166 divider, that way you won't be overclocking your RAM so much and you should be able to go higher with your CPU. You should be able to up the command rate of the RAM to 1T too hopefully. Make sure you test for stability along the way too, Orthos/Prime for only an hour isn't enough, most consider 8 hours to be "stable".

Amonlym · 7 Jul 2007 at 12:06

sorry i looked at jaykay's cpuz not OP's :$

do what he says (points at El Jimben)

Delvis · 7 Jul 2007 at 16:17

Hey guys, sorry to hijack, but im clocking my 4400+ (once again) And was wondering whats a safe temperature for the chipset temp going by the readings on Smartguardian?

I've clocked the chip to just under 2.5ghz currently, and the chipset is reporting temps of 45c, and cpu is at 45/46c. This is with Orthos running the cpu stress test.

Thanks in advance

Ah yes forgot to mention, my motherboard is the A8n-SLI premium, so its passively cooled. Thats why im asking mainly.

Tee Hee Johnson · 7 Jul 2007 at 20:27

mines is at 2.8 the now, solid as a rock!

keep going with your oc

strelly · 7 Jul 2007 at 23:24

craig_kennedy83 said:
mines is at 2.8 the now, solid as a rock!

keep going with your oc

Good work, is that with air cooling?

If so what temps/cooler you got?

Also... will post some pics of the chips tmw!

thanks!

strelly · 8 Jul 2007 at 11:03

Amonlym · 8 Jul 2007 at 12:58

5B-D (nice pic btw, good camera?)

Should be good for crazy mhz (280ish for a good stick 250-260 for average) @ 3-3-3-8 1T then. avoid going over 2.8v for the ram tho.
so in theory shouldnt be holding you back just yet (unless its a poor batch of chips)

good luck going further,
did you pass 2400 stres testing?

you might get further by dropping ram to the 166mhz setting, or upping the ram voltage a bit. im not to familier with your board tho, so cant say for sure, sorry!