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AMD Motherboards & CPUs Questions or comments on AMD products?


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  #1 (permalink)  
Old 18th July, 2006, 05:21 PM
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Question 1)OC? 2)Stepping?

Ok I am planning to order the Proc for my project soon, within the next 3 weeks. I have a new 939 motherboard so it will be a 939 and I expect it will also be an X2. I am leaning towards a 3800+ X2 at the moment But I thought I would wait a bit to see if the prices would indeed come down as predicted. (currently $197 is the lowest 3800 X2 I have seen) So I have two questions:

1) What kind of overclock can I expect with watercooling, nice ram and a good motherboard? 3Ghz? More?

2) What does stepping mean? I have seen it mentioned in several threads but I am not sure I understand.
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Last edited by BobRoss; 18th July, 2006 at 06:15 PM. Reason: formatting
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Old 18th July, 2006, 05:59 PM
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ON your cpu ya got a bunch of numbers.

OSA170DAA6CD
CCB1E 0609FPAW
xxx956xx0204

the first line is the cpuid programmed into the chip. In this case, Opteron 170. the meanings of each letter of this line is well documented...and too much for me too type out.
CCB1E is the actual mask revison for this cpu.

The first "C" denotes final production.
The second "C" denotes that the mask was dual-core. "B" is singlecore
"B1" is the memory controller revison.
"E" is the cpu revison.

0609FPAW denotes the week, year, day of the week, and "lot" #.

Last line is serial number, denoting the actual slice the cpu came from, and the last four numbers denote where on that slice it came from.

There is other specific data programmed into the cpu, like TDP, tCASEmax, Juction offset, etc, but these are hidden within the coded matrix at the bottom.
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Old 18th July, 2006, 06:25 PM
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Then it is the last line that I am concerned with?
That is what is meant by stepping?
So which slice do I want the cpu to come from? And where on that slice do I want it to come from?
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Old 18th July, 2006, 09:10 PM
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Knowing where they come from isn't material to your needs. What you want is a stepping that others are having excellent or at lest good results with.

" 0609FPAW denotes the week, year, day of the week, and "lot" #. "

In this case I don't know what that might be. But some one will be along who does.

Good to see you again Bob! ":O}
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Old 18th July, 2006, 11:12 PM
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Quote:
Knowing where they come from isn't material to your needs. What you want is a stepping that others are having excellent or at lest good results with.

" 0609FPAW denotes the week, year, day of the week, and "lot" #.
I think it's more a concern about the 'lot #' rather than anything else. If people are reporting excellent o/c's with a certain 'lot stepping', try and find a CPU that comes from the same lot.

As Danny said, someone will come here to explain all the funky stuff. I'm not too familiar with stepping, myself.
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Old 19th July, 2006, 04:08 AM
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Well, it's actually the stepping mask that is important, the "CCB1E", combined with the "0609FPAW". The "B1" denotes one of the best cpu's for air/water cooling there is right now, and they come in Opteron 165 and 170 badging most often(for 2mb daulcores, that is). This particular mask is well know to run certain ram dividers well with high HTT.

Once those two are looked after(simply look for people with high cpu speeds and the "stepping" and "date code" they have, as generally almost all cpu's will perform the same from a given mask...)once they are taken care of, the last 4 digits of the serial number are most important. the lower teh number(eg 0067 vs 4582) the closer to the middle of the slice, and the better the cpu will perform when compared with others of the same mask revison and date code.


BUT..................

This is only for IHS-LESS CPU's...given the same cooling...if you don't pop the top, then it's luck of the draw. Typically the higher the thermal offset, the worse it will perform, once again compared to other cpu's of the same stepping and date code.
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Old 19th July, 2006, 04:09 PM
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I'm sorry for my ignorance but what is IHS-LESS and what do you mean by "pop the top"?
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Old 19th July, 2006, 04:16 PM
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Remove the integrated heatsink that is on the cpu...the nickel-plated chunk of metal.
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Old 19th July, 2006, 06:46 PM
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Is it adviseable to use some type of shim to stabalize the waterblock over the core once the heat spreader is gone?
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Alienware 7700 Laptop P4 HT 2.4ghz 1G ram 17"screen

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Old 19th July, 2006, 06:58 PM
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depends on the core. I ahve chipped a few myself, but it was purely due to carelessness, and not from tightening my block...venice core is very small, so easy to not crush core, but crush the surrounding SMD's. The Manchester is large enough that this is not really a concern. The toledo cores seem to be fine, but a Sandiego is still quite fragile.

It also depends on the mount...and how you put your block on. As long as you are careful, and the case does not move often, no concern is ever there, IMHO. If you are not careful, and the case moves lots, or goes to LANs, then I'd definately take precautions.

Kepp in mind tho...i never said you had to leave the IHS off...
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