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A64 4000 San Diego - Good overclocker?

Heatsinked

Heatsinked

Heatsinked

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Exact details listed below:

Version 4.1
Stepping 1
Revision SH-E4
Model 7.2
Generation 15.0
Process Technology: 0.09 micron
Date: April 4 2005

I'm not entirely sure what some of this means but I know certain CPU batches (is that the right term) overclock better than others.

Can anyone tell me or help me find out if my CPU has the potential to be a good overclocker? As so far I'm not having much luck with it... but that could be something else which I don't want to discuss here.

Thanks for reading :)
 
Try to find the stepping code, its the second line of numbers and letters printed on the cpu. But from the date you have mentioned yours seems fairly old, so not sure of its overclocking ability. For example my 4000 reads KAB1E 0626FPMW on the second line and can do 3.1ghz with just 1.39vcore.
 
Aye, tis what I was thought...

Not having much luck with mine you see. Temps are fine, running RAM at stock speeds and the HT is slightly underclocked.

Not sure what's holding me back but that's for another thread in the Overclocking forum I guess.

Thanks for your help guys. I don't really want to take my heatsink off the cpu again to look for the code... was hoping some software would know!
 
I got mine @ 3.0Ghz on 1.37V coretemp reading 28-30C idle and 38ish Load.
Mine is also from the later batch of OEM OCuK stock.

I did read that the earlier steppings needed lots of juice just to push them a little bit. Your stepping is really important, I have found you a list of steppings for some of the older ones:

1. CABNE 0528/0530
2. CABYE 0540 FPBW
3. CABYE 0540 FPMW
4. CABYE 0540 FPAW
5. CABNE 0540 / CABYE 05xx (not 0540)
6. CAB2E
7. CABGE
=============
1. is best
7 is worst

If yours isn't on the list google is your friend!

Good Luck.
 
gunner said:
1. CABNE 0528/0530
2. CABYE 0540 FPBW
3. CABYE 0540 FPMW
4. CABYE 0540 FPAW
5. CABNE 0540 / CABYE 05xx (not 0540)
6. CAB2E
7. CABGE
=============
1. is best
7 is worst
Click to expand...

Those are all opteron steppings iirc, the 4000+s have KABxx steppings (atleast recent ones have tended too).
 
Thanks for that gunner, my 4000 definitely likes more juice!

Running at 2.7Ghz on 1.55v... don't really want to push it any further, although I understand these 4000's can take 1.65v if really needed.

I will see how it goes. I had to increase the volts on the nVidia chipset to make the overclock stable... it's a bit toasty but that will be sorted once my new chipset cooler arrived.

Again, thanks for all the help. 2.7Ghz for a CPU that doesn't clock too well is OK in my book :D

niteflite01:

What volts and other settings are you using? Would you mind sharing?
 
Sorry I got those steppings mixed up here is whar you need:

KAB1E - Relatively new stepping, reasonable air overclocker. Expect ~ 2.8GHz
KAB2E – Comes in 2 varieties. The older KAB2E’s from mid-late 2005 are decent overclockers which overclock to around 2.9GHz. The newer 2006 KAB2E’s are overclocking like gems at the moment. An example of this is Crash’s and Krunk Kracker’s, which overclock to around 3-3.1GHz. In general KAB2E’s require a lot of voltage to reach the higher overclocks.
KAB3E - A better overclocker and much rarer stepping than the older KAB2E’s. They still require larger Vcore’s to reach the higher speeds but expect ~ 3GHz.
KABNE – An unusual stepping which is hard to get hold of. It performs similarly to the KAB3E so is capable of ~ 3Ghz.
KABYE – Again a rare 3700+ stepping which performs well. Expect ~ 2.9-3GHz
KABQE – As with the KABNE and KABYE, the KABQE is a scarce 3700+ stepping but actually overclocks better the 2 aforementioned steppings. A typical overclock would be just over 3GHz with low Vcore.
KACAE - Possibly the best chip for air cooling and can reach very high speeds with low voltage. Most KACAE’s will achieve >3GHz, but some steppings (i.e. the 0602GPMW) are capable of 3.2GHz! Unlike the KAB2E’s they do not seem to scale well with Vcore and tend to perform best when at a lower Vcore.
CCBWE - This is and example of an E6 revision 3700+ and is commonly thought of as a Toledo core CPU with one core disabled. A CCBWE will not perform too well on air cooling (around 2.8GHz) but will do very well on sub-zero cooling such as Phase-Change cooling.
CABGE - Old stepping which is not as common lately. Just like the Opteron 146 CABGE they are in general bad overclockers which will usually only reach 2.6GHz-2.7GHz. Fear the cabbage!
KABGE – Similar the cabbage above. They do slightly better and overclock to around ~2.7GHz but still don’t come close to the superior later steppings.
 
Excellent effort, many thanks mate!

Is there anyway to find out the stepping without having to remove the cooler? Not that I am lazy or anything... :rolleyes:
 
CPU - 255MHz
FID - x11
HT - x4

DDR - 2.6v
CPU - 1.425v
Chipset - 1.5v

My RAM is cheapo Crucial so I have it running on a divider to keep it at stock speed.

I use air cooling, my CPU idles at 28, and gets up to about 41-45 when pushed :)
 
So is looking at the CPU directly the only way of finding out the stepping? Or does anyone know of a really useful application that can do that for me? ;)
 
gunner said:
Sorry I got those steppings mixed up here is whar you need:

KAB1E - Relatively new stepping, reasonable air overclocker. Expect ~ 2.8GHz
KAB2E – Comes in 2 varieties. The older KAB2E’s from mid-late 2005 are decent overclockers which overclock to around 2.9GHz. The newer 2006 KAB2E’s are overclocking like gems at the moment. An example of this is Crash’s and Krunk Kracker’s, which overclock to around 3-3.1GHz. In general KAB2E’s require a lot of voltage to reach the higher overclocks.
KAB3E - A better overclocker and much rarer stepping than the older KAB2E’s. They still require larger Vcore’s to reach the higher speeds but expect ~ 3GHz.
KABNE – An unusual stepping which is hard to get hold of. It performs similarly to the KAB3E so is capable of ~ 3Ghz.
KABYE – Again a rare 3700+ stepping which performs well. Expect ~ 2.9-3GHz
KABQE – As with the KABNE and KABYE, the KABQE is a scarce 3700+ stepping but actually overclocks better the 2 aforementioned steppings. A typical overclock would be just over 3GHz with low Vcore.
KACAE - Possibly the best chip for air cooling and can reach very high speeds with low voltage. Most KACAE’s will achieve >3GHz, but some steppings (i.e. the 0602GPMW) are capable of 3.2GHz! Unlike the KAB2E’s they do not seem to scale well with Vcore and tend to perform best when at a lower Vcore.
CCBWE - This is and example of an E6 revision 3700+ and is commonly thought of as a Toledo core CPU with one core disabled. A CCBWE will not perform too well on air cooling (around 2.8GHz) but will do very well on sub-zero cooling such as Phase-Change cooling.
CABGE - Old stepping which is not as common lately. Just like the Opteron 146 CABGE they are in general bad overclockers which will usually only reach 2.6GHz-2.7GHz. Fear the cabbage!
KABGE – Similar the cabbage above. They do slightly better and overclock to around ~2.7GHz but still don’t come close to the superior later steppings.
Click to expand...


don't know where you got that from ....but the 4000+ KAB1E's do 3ghz on air in their sleep.

look @ my sig
 
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