Author: Aaron Gordon
Date: 22:33:33 02/18/03
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>AMD doesn't guarantee 2.3 GHz out of any of their chips. As I recall, you had a >particularly bad one recently... > >Anyway, if AMD doesn't define the limit of stability, who does? Some P4s >overclock to 4 GHz now, don't they? > >-Matt Yeah, I got a JIUHB 0301, The TbredBJ's (J being JIUHB) are the $50 chips that do 2.0 to 2.3GHz, I got 2.15GHz, I wasn't happy so I sent it back. TbredBA's are much better (A being AIUHB). They WILL do 2.3GHz to 2.6GHz. Get any AIUHB 0242 (week 42 of 2002) or newer and you will be guaranteed to hit 2.3GHz. How do you know which chip you're getting? Well, on excaliberpc.com they guarantee you get a 2100+ AIUHB 0304 (week 4 of 2003) TbredBA. Also, yes, some P4's have been hitting 4Ghz but thats with freon. An XP 2.5GHz is compariable in speed to a P4-4GHz and you can get the XP to 2.5 on just air. With Freon they'll go up to over 3GHz. From what I've seen/heard AMD/Intel just make chips on a few lines. AIUHB's for example. Once they hit a better chip consistantly overall or add something new (like AXIA vs AYHJA, running 20% cooler) they'll add another stepping. Also I figure they both do this.. lets say AMD is producing all it's highest quality cores (as both AMD/Intel are doing constantly) and AMD chips can do 2.3-2.6GHz. This means they can guarantee any of those chips to run 2.3GHz and lower, hence you get the 2800+ (2.25GHz). I figure once they start producing chips that do a minimum of 2.4GHz, 2.5Ghz, etc (Maybe future AIUHB 0320's or perhaps some new stepping alltogether) then they'll be able to release faster chips and guarantee them at that speed. So what I'm trying to say is as long as there is a chance they won't do such & such speed, they won't mark them as such. Some chips can, however. Enricos AIUHB 0246 for example runs 2525MHz at 1.92v air-cooled without problems. My chip does 2440MHz (will be getting it up a little higher later on, but you get my point). It is possible if AMD wanted to they could produce an X number of chips and test them all (too time consuming) and only get the ones that run 2.6GHz, then they could release those in a limited quantity. Of course then everyone would get those chips instead and AMD would start losing money on the chips they made previously where they could have waited and sold an X ammount of slower chips. I'm not sure I'm explaining it right but I think you'll understand what I'm talking about.
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