Problems with opty 165 overclocking

Senture · 17 Jul 2007 at 21:23

Hi every one, I've run into a brick wall with overclocking my opteron 165. the chip its self is a bad overclocker (can grab the CPU stepping code if needed), but the problem isn't the CPU, it's the motherboard. This is the setup I have:

DFI Lanparty UT SLI-DR Expert (with latest BIOS)
Opteron 165
2x 1GB Ballistix DDR500
Zalman 9500
Tagan 700W

I've locked the CPU's vcore down to 1.35V, the memory at 2.71V, the LDT at 1.2V and the chipset at 1.59V (default 1.52V). I've also used the deviders and multiplyers to keep the RAM just below 200Mhz, the HT below 1000Mhz and the CPU below 1800Mhz. The system runs fine on 250FSB, but 260FSB is where the problems start. with 1.59V chipset it fails orthos blend after 2 mins, increasing the chipset to 1.62V causes windows to crash and 1.67V stops the PC booting.

I've also tryed adjusting the CPU voltage, the memory voltage, the LTD voltage (only by 0.1V) and the memory timings, all to no avail. Can any one give me some sugestions on this problem please, I was expecting to get a bit further with this.

Cheers
Senture

luismenendez · 17 Jul 2007 at 23:55

if you have the stepping would be easier to help

About the mobo, I am afraid don't know much

Senture · 18 Jul 2007 at 00:00

CCBWE 0551

kitfit1 · 18 Jul 2007 at 11:28

First off, a CCBWE 0551 is unlikely to do more than 2.7g on air when clocked properly. So if you eventualy get to that point, trying for any more would be a bit futile. Reading your post it seems to me that A64 clocking might be a new experience for you ? Add to that the fact that you are trying to do it with an Expert, you will be in for a very steep learning curve. The best advice i could give would be to go here and have a very good read of the overclocking guides. Also to get you going a bit quicker have a look at the 939 overclocking database. Look for rigs with the same mobo, ram and cpu as yourself. You could then use there ram and voltage settings to get to a stable position.

Senture · 18 Jul 2007 at 12:05

Cheers for the info

. I had another try last night at seeing if I could get arround the problem. I remembered reading about some one who had problems with certian FSB frequencies, but higher ones worked. The board is ok with 290-315 FSB, but any higher is a no go. It's my first time with an AMD chip since the XP 2100+ came out.

The chip is running at 2.6Ghz stable (290x9 1.55v) but any higher won't happen, it will boot but failes orthos small FTT within seconds, even with 1.6v (was verry worried at that). I'm going to leave it at 2.6 anyways, it's had 11 hours on orthos and that's fine for me

kitfit1 · 18 Jul 2007 at 12:32

Yes, 1.6v on air is really a no-go area. But the Expert will run much higher than 315, even my Ultra-D does 335-340. When you were trying for 315+, did you drop the LDT multi to 3 ? Also when your at about 310 you should raise the LDT voltage up 1 notch, in my case it would be to 1.3v from 1.2v. Also sometimes only certain dividers will play ball at a given HTT. So it's worth dropping down the dividers until you find one that will allow you to boot. Most peeps at "The Street" will tell you that 99% of the problem getting a DFI to run nice and fast is ram related. That's my experience as well, get the ram right and everything else drops into place nicely.

Senture · 18 Jul 2007 at 14:58

When i was testing the max FSB of the board, as soon as I hit 260FSB I droped the LDT multi to 3x to keep the HTT speed below 1000Mhz. It ran fine (using orthos blend test for 30 mins) so then tryed 270, thats where the problems started. Increased the chipset voltage from 1.59v to 1.62v and it failed to get into windows, tryed 1.67v but then it wouldn't post. During all the testing I keps the ram below 200Mhz, although the stock is rated at 250Mhz.

I'll give the LDT voltage increase a try and see if I can get into Windows on 9x300Mhz

kitfit1 · 18 Jul 2007 at 15:06

Senture said:
I'll give the LDT voltage increase a try and see if I can get into Windows on 9x300Mhz

What divider are you going to use at 9x300 ? As i said, the LDT voltage dos'nt need to be increased until you are at 310. Increasing the chipset voltage has no effect unless you are running your PCI frequencey out off spec.

Senture · 18 Jul 2007 at 15:15

The memory devider reported by CPU-Z 1.40 is CPU/11 which with the FSB at 290Mhz results in 237.3Mhz RAM

EDIT: BIOS shows 5:6 (RAM:FSB)