Problem with Opteron 165 in OC

[aminel1358]

Hello everybody,
I have an Opteron 165 and I have heard about opty's potential of OC, but unfortunately I still could not go anything above 1926 Mhz(9x214) with a little raise of voltage (about 0.1) offcourse I had my ram work at 333Mhz and HT at 4x
My MB is Asus A8NE. My RAM is Apacer DDR400(2x1mb) VGA Leadtek 7950 256Mb
with this MB and an AMD Athlon64 3200+ (my previous CPU) and a pair of 512Mb DDR400 Kingstone I have reached 2600 Mhz ,but now I can not go any further
What do you think is my problem :?:

 

[ethel]

Hello everybody,
I have an Opteron 165 and I have heard about opty's potential of OC, but unfortunately I still could not go anything above 1926 Mhz(9x214) with a little raise of voltage (about 0.1) offcourse I had my ram work at 333Mhz and HT at 4x
My MB is Asus A8NE. My RAM is Apacer DDR400(2x1mb) VGA Leadtek 7950 256Mb
with this MB and an AMD Athlon64 3200+ (my previous CPU) and a pair of 512Mb DDR400 Kingstone I have reached 2600 Mhz ,but now I can not go any further
What do you think is my problem :?:

Well, there are only 4 things that can be the limit really:
1) CPU
2) RAM
3) HT Bus
4) FSB

If you're sure it's not (2) or (3), then it must either be your CPU or your board - is the BIOS up to date?

 

[Ninjaz7]

Try using a ratio in your ram,try some diffrent ram(borrow from a buddy),just a couple of suggestions...no HT over 1000 gl

 

[aminel1358]

yes I have the latest BIOS installed.
Do you know the exact voltage tolerance of my CPU?
Maybe upper voltage will help :?

 

[funkee1]

When you say you raised the voltage by .01, what exactly do you mean, ram, or cpu?

And it is possible you either got a defective cpu, or you could have damaged it by static electricity. Were you grounded while handling your cpu?

 

[funkee1]

i know it can get past 1.5v easily.

 

[aminel1358]

I have raised the CPU voltage.
but do you know how far the RAM can go?

 

[funkee1]

No, but just use the memory ratios to keep it under or at ddr400. Then you absolutely know your ram is not holding you back. And either way, on an AMD system, unless you have some uber overclocking ram, your gonna get the best performance by using it at ddr400 at lowest possible timings.

Hope this helps!

 

[funkee1]

got my sig, holla!

 

[merc14]

What stepping is your CPU?

 

[aminel1358]

this is what cpu-z shows
Stepping 2 Revision JH9-E6

 

[funkee1]

Unfortunately, you actually have to look at the CPU itself to find the stepping we're referring to. Its gonna say something like ccbbe0615, or something similar.

 

[merc14]

No it is on th top of the CPU itself, on the IHS. Regardless, ad some Vcore, set the RAm on a divider and set HT to 4X.My old Opte 165 (stepping CCBBE) ran at 3004MHz 1.49v Vcore for refernce pruposes. Without watercooling you'll probably be limited to 2.8GHz due to heat.

 

[ethel]

yes I have the latest BIOS installed.
Do you know the exact voltage tolerance of my CPU?
Maybe upper voltage will help :?

.2V above the standard voltage is safe, anything higher is regarded as risky.

It's an amazingly poor overclock for a 165 - are you sure the CPU is not overheating?

 

[meadowlands]

I have the EXACT same specs (different brand ram) and cannot get above what the original poster listed. I have:

-Updated BIOS
-No Overheating (50c on full load 40 idle)
-I reduced the MHZ on the RAM too

I cannot get above 1945 MHZ, the comp will just loop and the monitor gives me the no signal stuff...

I had my athlon 64 3200 at 2500 MHZ before this...and it was stable with good temps.

 

[merc14]

- Set FSB to 245 (2205MHz on CPU)
- Set CPU voltage (Vcore) to 1.41v
- Set memclock to DDR333 (5:4 divider), leave RAM and Vdimm alone.
- Set HT to 4x

See if it will boot. Watch the temps as 50c is slightly high for a below 2000MHz overclock. As I said, a good stepping 165 can do 3000Mhz on 1.5v, give or take .02v either way, on water or peltier cooling. Expect 2800MHz-2900Mhz max on air.

Also, the A8N-E and A8N SLI boards have RAM problems above 240 FSB so you may have to got to 2T timing. Iwould recommend you get a nice used A8N32 SLI board with 8 phase power. They are cheap now and great overclockers.

 

[meadowlands]

50c even on full load?

 

[merc14]

Yes I'd say that 50c at 1926MHz is slightly high considering what the tope end of a good 165 is. Add some volts and raise the frequency and you will be at 60c very quickly. 60c is the warning temp for me on the A64 chips. Just watch it is all. It may hang at 50c for awhile and won't be a problem or it could be at 60c before you hit 2400MHz.

 

[illicitsc]

lock pci bus to 33mhz

 

[meadowlands]

Could my 420W power supply not be giving enough juice?

 

[funkee1]

No it is on th top of the CPU itself, on the IHS.

Well duh did you really think I meant the die?

 

[merc14]

Yes it could depending on its quality and the amps on the 12v rail.

 

[funkee1]

- Iwould recommend you get a nice used A8N32 SLI board with 8 phase power. They are cheap now and great overclockers.

Or you could be a real overclocker and get a DFI Lanparty DR.

And btw, on that board, and with the right stepping, you will break 3.0ghz on air. Peace.

 

[merc14]

No it is on th top of the CPU itself, on the IHS.

Well duh did you really think I meant the die?

Hey funkee, I was typing at the same time as you and didn't even see your post. Chill out mate. :roll:

 

[meadowlands]

It is one that came with the case, but it served me well for over 4 years. It also lacks the 24 pin connecter in which I had to buy an adapter for it.

I was toying with getting a new PS but I hate to toss one that is working..

Anyway, the OP and I seem to have the same issue, we both were able to OC our A64's with no prob but now are having problems.