AMD Phenom II X3 700 Series OC Club - Page 13 - Overclock.net

Bitey · 03-23-09

Quick question....

I have a X3 720 (0904EPAW model), that I was able to unlock and use the fourth core. The 4th core ran fine and was able to perform Prime95 operations for many hours. Was detected as a Phenom II X4 20.

Gaining confidence in my overclocking prowess, I decided to start upping the multipler in the BIOS. As soon as I moved to x16 (3.2 GHZ) and restarted the machine, the fourth core disappeared from view. CPUZ reported X3 720 (with 3 physical cores). Going back to the BIOS, I made sure that ACC (Advanced Clock Cal) was still activitated. It was. Going back to 2.8GHZ (Auto multipler) changed nothing. The fourth core seems to have disappered.

Anyone have this problem? (x3 720, GIGABYTE GA-MA790GP-UD4H, 4gb 1066, GTX 260 Core 216) Should I clear the CMOS and see if that fixes anything? Should use AMD Overdrive next time.....

Cheers

elito · 03-23-09

definitely clear the cmos, im also starting to think that the GX boards have a higher % of stabilizing the 4th core, cus im using ud4P with F2B bios which enables ACC/ unlocks the core, but..can't be stable no matter what. either that, or i just have a bad chip. i'd need 2 setups inorder to test this theory ofcourse, but..i dont have that type of funds. har.

elito · 03-23-09

sorry OP, my latest update on my status is..everything's the same, except the NB frequency, currently hitting 2.4ghz! ^ ^. ya i think we should include a NB colum too..

idk if there are any REAL world helps with the NB being high, but atleast in everest, it increases mem/cache reads/writes/ in all categories.. :P

Bitey · 03-23-09

I was of the impression that the board mattered very little as long as you have a 750 southbridge.

The CPU seem to be hit-or-miss depending on the manifacturing time. Some X4s clearly went to X3 production without error (to either fufill x3 demand or due over-cautionous behavior from AMD). Other X3s have defective cores in someway or another- accurately picked up by AMD testing.

mxthunder · 03-23-09

Quote:

Originally Posted by elito

your NB defaults @ 1.3? mine was only 1.1 on this board...and its awlays fine to just push a notch up in volts.

it defaults to 1.1 or 1.2 I cant remember, but I was just wondering how it affects temps by pushing it up to 1.4. I am pushing the limits of my AC freezer64 and am debating the upgrade to a Sunbeam CCF.

On the other hand, my system will pass prime95 small FFTs 4+ hrs, but will fail after 1.5hrs with the blend test. Is this a sign that I should up my NB voltage?

elito · 03-23-09

Quote:

Originally Posted by mxthunder

it defaults to 1.1 or 1.2 I cant remember, but I was just wondering how it affects temps by pushing it up to 1.4. I am pushing the limits of my AC freezer64 and am debating the upgrade to a Sunbeam CCF.

On the other hand, my system will pass prime95 small FFTs 4+ hrs, but will fail after 1.5hrs with the blend test. Is this a sign that I should up my NB voltage?

its a sign that somethings not right with ur memory setting. i think small fft's are cpu and large is mem...so blend is both. so if youre having 0 issues with small..that means is most liekly mem related. whats ur mem currently running at? you should NOT touch the nb and ht volts yet, because they're not getting OC if they're ~>2000. going above 2100+ then you should up a notch..

and you can't recieve PM's???

mxthunder · 03-23-09

Interesting. My memory is not OC'd at all. I will have to check into that and run some type of memory diagnostic.

I recieved one a few weeks back, why did you try to send one?

Altimax98 · 03-23-09

Ive got a problem with my memory and I cant figure it out. I cannot pass any stability tests that include mem tests. Ill pass a Low Batch test in OCCT and a stability test in amd overdrive fine and 3dmark06. But That mem test kills me everytime. Im running a DDR3 board with corsair 1333mhz mem OC'able to 1600. Im running at 401mhz and i still fail tests that include mem. I dont get it, what should I do???

Settings: FSB - 200, Multi - 18, CPU-V - 1.450

elito · 03-23-09

Quote:

Originally Posted by mxthunder

Interesting. My memory is not OC'd at all. I will have to check into that and run some type of memory diagnostic.

I recieved one a few weeks back, why did you try to send one?

Quote:

Originally Posted by Altimax98

Ive got a problem with my memory and I cant figure it out. I cannot pass any stability tests that include mem tests. Ill pass a Low Batch test in OCCT and a stability test in amd overdrive fine and 3dmark06. But That mem test kills me everytime. Im running a DDR3 board with corsair 1333mhz mem OC'able to 1600. Im running at 401mhz and i still fail tests that include mem. I dont get it, what should I do???

Settings: FSB - 200, Multi - 18, CPU-V - 1.450

if its not a problem with the mem, then its definitely voltage. maybe your chip needs more than 1.45 for 18X multi...

PsikyoJebus · 03-23-09

I'm noticing some of the overclocks here have the HT at 1000Mhz even though their FSB hasn't been touched. Does a lower HT help stabilize an overclock even if the mobo can support the FSB at 2Ghz, or is this just because the northbridge clock is really low?

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AMD Phenom II X3 700 Series OC Club

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