Author: Matt Taylor
Date: 22:45:52 02/18/03
Go up one level in this thread
On February 19, 2003 at 01:33:33, Aaron Gordon wrote: > >>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. That is pretty much what I said, but it is a different perspective. My point is that some chips -can't-. There is no point in stating that a particular processor can reach a specific nps because I can't simply go buy that processor. I can buy what AMD will sell me. If somebody runs their AthlonXP at 3 GHz under freon and reports their numbers, how does that help me? Likewise if somebody overclocks higher than I can, how does that help me either? >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. I do. It is still a gamble according to what you say. -Matt
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