X2 4800+ @2.8Ghz but now getting errors

[skubidoobie]

Everything is fine stressing cpu only, but using cpu/ram stress I get "FATAL ERROR: Rounding was 0.5, expected less than 0.4" occurs after about 2 minutes, says look in txt file but there isn't one lol. Memory is OCZ Platinum XTC DDR400 1GB X 2, have it at 2.95v 3-4-4-8 2T timings (motherboard A8N32-SLI Deluxe only allows up to 3 for CAS), memclock is at 216mhz, cpu-z gives me 255.3 mhz for a frequency. 12X234=2.808Ghz cpu speed. CPU temps are about the same at 2.8 as 2.7, 47c during Orthos. Will try changing memclock back to 200mhz on my mobo, options are 200, 216, 233, and 250mhz. Still reads at about 233 on cpu-z @ 200mhz mobo and same errors. Has my memory hit the wall? Any input is greatly appreciated!

 

[GuitarDaddy]

Your ram overclocks with the HTT/FSB so with a memclock of 200 and HTT of 234 CPU-Z is correct with the 233 reading. Your board should have memory settings less than 200?
Set it at 166 and that will give you just under stock on the ram and should solve your problems.

 

[skubidoobie]

Good call, tried it at 183 and going good so far, 10 minutes of Orthos and counting. Don't understand why at 2.7 I could run my memory at 216 memclock and get a 245.5 frequency but @ 2.8 couldn't run it at 200 for a 234 frequency.

 

[myocardia]

That's because the memory controller isn't on the motherboard, it's on the cpu, and the faster your cpu is running over it's stock speed, the harder it is on the memory controller.

edit: And some memory controllers are much "stronger" than others.

 

[skubidoobie]

Trying to get to 3Ghz, can get there but absolutely no stability even with the ram at 166. 12 x 250= 3Ghz ram=200 but instant errors with Orthos/Prime95. It's too bad, temps aren't even an issue.

 

[aigomorla]

ummm you failed to list voltage on CPU.

And maybe your CPU is capped at 2.6.


AHHHHHHHHHHHHH i miss my opty. I sold her to someone that wanted to go for a WR on LN. Bah... 3.08ghz on 1.31V owned.


Anyhow tell me your voltage b4 i can advise you anymore. You may need to bump up cpu voltage.


Also if possible, your steppings would be nice. That can also guessimate your max OC.


Example: My Opty was CCBBE 0617 EPMW.
Cry... I so miss her :[

Oh wellz my E6600 at 3.6ghz will pwn the living hell out of her tho.

 

[skubidoobie]

1.5v cpu 3.0v ram(max within warranty). Well it's same Toledo core, revision, stepping, model, etc as your opty, as far as that CCBBE whatever I have no clue lol. Max stable I can get her right now is 2.82 with memclock at 183 3-3-3-6 2T timings. Anything faster seems to be a wash, unless I just need to tweak more stuff. At 2.9 right now, idle 34c but still getting errors.

 

[aigomorla]

OKEY. You seriously need to check out the steppings.

CCBBE 0617 EPMW DOES NOT LIKE VOLTAGE from 1.4-1.55V

My baby would not POST at 3.0ghz at voltages in that ragne. It was extremely wierd.

Im assuming your on AIR so 1.5V is dangerous for you even. I dont care what kind of air cooler you have, 1.5V is seriously asking for it, if your comp is on 24/7


My initial recomendations, although it may sound funny, is drop your voltage to around 1.4V See if she does it on that voltage.


And about the ram issues, i had the same problem. Also i would recomend running the ram at 1T timings. and also drop the voltage there too. If i remember correctly, that ram does better at 2.85V then 2.95V.

 

[skubidoobie]

"FATAL ERROR: Rounding was 0.498004012, expected less than 0.4" was the error after applying the settings above @3Ghz. My pc is air cooled, I just installed my Ultra 120 this weekend and retired my old XP-120. I run a total of 10 fans in my case so it has plenty of air movement. It never runs 24 hours straight, ok maybe once in a while, but a very rare occasion. It's only on while checking e-mail, on forums, or gaming my brains out, usually the latter.

 

[aigomorla]

hmmmmm.....


last thing ican think of is your HyperTransport.

You are keeping your hypertransport value less then 1000mhz correct? The value where your suposed to match your FSB with the HTT x ?

Stock multi should be 5x. If you want 250, you should be at 4x. Anything higher then 250, you'lll need to drop that value one more to 3x.

 

[skubidoobie]

stock multi is 12X, I have it 12 X 235= 2.82Ghz = Max stable clock so far. HT is at 705. Memclock at 183, frequency about 217, 3-3-3-6 1T. Up to 9430 on 3DMark06 http://service.futuremark.com/compare?3dm06=1489548 but I'd like to be able to hit the 3.0Ghz mark. Idles about 34c right now, full load after an hour of Orthos is about 47-48c. Will lowering the multi help me any? Is that taking stress of my ram and relying more on my fsb?

 

[myocardia]

At 235x12, using the 183 Mhz memory divider, your RAM is running 201 Mhz. At 250x12, your RAM will be running @ 214 Mhz, and should easily do it @ 2.5-3-2-5 timings. And the maximum vdimm that RAM should ever be given is 2.8v, not 3.0v. If you can't run at 250x12, it's because you aren't giving your cpu enough vcore. Of course, hardly any 4800's will do 3.0 Ghz, no matter how much vcore you give them.