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Zipzoomfly sent me a C0 rev 3400+ ClawHammer =(

M

mgsvr

Member
I ordered a 3400+ Clawhammer, and it's a C0 revision. I want a CG revision one though.

I'm not going to oclock my stuff, so should I just use the C0 revision? Or should I send it back, and buy it from Newegg hoping for a CG revision?

Help! this is the CPU number:

ADA3400AEP5AP
CAATC 0409WPMW
9564914C40110
 
You might want to toss it into your computer and see how high you can take it. Clawhammers in general are no slouches. I assume you're going to overclock it because to the lay person, C0 vs CG makes no difference.
 
Hi, I don't know what to do right now. Should I RMA it back to Zipzoomfly (bought it for 228 bucks) and get the one from Newegg for 35 bucks instead? I heard that C0 is not as good as CG version, and C0 also have problem with memory controller (or something like that). And no, I'm not going to O'C any component in my system either. Please help me decide. =(

By the way, I got all my component already. All I need is to put it all together this week (my first build). Now the CPU..... *cry*
 
He already said he's not going ot overclock, so that isn't an issue.

I don't see why you would send it back. There will not be a big difference if any difference at all between the two.
 
So I should keep it? I don't know, I have searched through google about C0 vs CG clawhammer, and people say C0 is crap, and CG is good and stuff like that. So I come here and ask you pros instead.

No oclocking. I just want to do pure gamming using stock speed.
 
My bet is that the ones saying C0 sucks are extreme overclocking nutcases. It has been shown that the newer steppings are better at overclocking which is directly attributable to process improvements. But since you are not overclocking then this is a non-issue. Now, I have 2 questions for you:

1. How do you know that your chip is C0 stepping?
2. Have any links to back up the issues you mentioned above? I've never heard that before.
 
Originally posted by: Theguynextdoor
What's teh difference between c0 and CG? I know one is clawhammer.
Click to expand...

Making CPUs isn't quite as static as stamping out license plates. Yields (or the quality) of the CPUs produced can vary from batch to batch, the those yields affect how fast those CPUs can clock.

When AMD bumps up their clock speeds, they often refine their process, and thus revise their CPU codes. CG CPUs are newer steppings than C0s, and are known to overclock higher.

At stock speeds, there is no difference, though.
 
In the future try excaliburpc if you want a specific stepping. Since you're not overclocking it shouldn't be a problem.
 
Sure, if you want to get nailed with a 15% restock fee plus shipping and get no better performance out of the Newegg chip, plus wait an extra amount of time ... 😛

Honestly, what kind of stupid question is this?

- M4H
 
Originally posted by: modedepe
Originally posted by: Megatomic
1. How do you know that your chip is C0 stepping?
Click to expand...

ADA3400AEP5AP
AP is C0 stepping. AR is CG.
Click to expand...
Thanks, I'm going to check my chip when I get home. I have a 3400+ Clawhammer, too. But I got mine from FuturePowerPC.com not ZZF.
 
oh riight, thanks guy for all the advice. I'm going to keep the C0 revision then. Btw, what is the Memory Controller problem that I heard from people in other board? They said C0 has trouble with newer memory controller...

I don't know
 
I have no idea about the memory controller problem. The memory controller is on the CPU now in A64 systems. If there was a problem with this then I'm sure there'd be alot of hooplah regarding the issue. To date I've heard nothing....
 
There is absolutely nothing wrong with the C0 Revision cpu's. On the CG revision, AMD changed alittle bit of the placement of certain transistors or something like that, to help the core run a TAD cooler and made it to where Command Rate will default to CMD1 instead of CMD2. There is almost ALWAYS a selection in the bios available to override Command Rate to change it to 1 or 2 if you want too. That is about the only thing different between the C0 and CG cores. I of course could be wrong but I think I am fairly close 🙂 Definitely do NOT RMA the cpu because of being C0. There is no performance difference between the C0 and CG unless the command rates are different. And maybe 1% difference if the C0 is using CMD2 and CG using CMD1.


Jason
 
Thank you guys, very helpful. Hey formulav8, when I install everything together (OS and stuff), is it wise to go into the BIOS to change the C0 rev into CMD1 instead of CMD2 for cooler CPU as you said? Or I should just leave it by default.
 
I ALWAYS overide the CMD to make sure it is set to 1. Some say (I have not researched) that A64's get probably the single biggest boost with Command Rate being set to 1 over the cas settings and the other ram settings. But I haven't checked to see if that is true or not.

EDIT: Some memory doesn't like CMD1, so you may be stuck with CMD2. But every stick I have had would do CMD1 perfectly 🙂

I do know that A64 does like to have its memory with low latency's. I forgot where I saw it, but they benched the A64 and P4 with high and low timings. The A64's gained the most with low timings over high timings. The A64 gained a average of 5%! with low timings over high timings. That is almost a similar boost that the next higher cpu speed grade would give you. So, if you can afford it and want every last ounce of performance you can get, low timing memory will give you that extra umphhh. Sorry I got carried away alittle 🙂


Jason
 
Ok, but if I change the default C0 rev CMD2 into 1, will it damage the chip, not being stable, or anything like that? Can I install my OS and programs first, then change the CMD2 into 1 later in the BIOS? Or do you think I should force CMD2 into 1 first before install OS/program?

Thanks
 
Hi, don't worry about damaging anything 🙂 The worst that could happen is your comp could become unstable.

It won't matter when you install your OS and apps. The CMD Rate has nothing to do with software. It is between your Cpu and Memory Controller 🙂



Jason
 
Thanks a lot formulav8. I haven't build my system yet, probably done by the end of this week. Once I'm set with installing OS/Program, I will come back to this board to ask for CMD change or not as the final decision. Once again, thanks!
 
Well, it turns out that my chip is a C0 also. I had figured it was but I know for sure now. This doesn't change anything for me though, my system is so sweet.
 
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