Author: Robert Hyatt
Date: 09:17:18 12/02/02
Go up one level in this thread
On December 02, 2002 at 10:18:42, Aaron Gordon wrote: >You can find out where the chip was made, when it was made and what stepping the >CPU is. For example.. if someone walked up to you with three Thunderbird cpus. >One was an AFFA stepping, one was a BXHA stepping and the other was an AXIA.. >which would you choose? No idea? Only by LOOKING at the top of the cpu can you >figure out which particular chip it is (I'm not talking about just the cpuid >stepping info). Someone that knows what they're doing would choose the AXIA. It >has a 1.5GHz core (doesn't matter what it's marked) and can run 1.5GHz without >problems. BXHA can't do over 1.2GHz and an AFFA has problems hitting 1GHz. How >about on the line below the stepping? There are two possibilities.. one will >start with a number, the other with a letter. Any idea which one to choose? The >CPU w/ a letter (usually a 'Y') can run a good 50MHz faster. If you don't like >overclocking you can always drop the voltage and leave the chip at it's current >clock speed. An AFFA Tbird at 1GHz would need 1.75v at the least. A 1GHz AXIA >could run 1.3v. Thats going from 54.3 watts to 29.96 watts. If you get an AYHJA >you can just do watts * 0.80. You are answering your own query. I look at the specs. I order the product. If it doesn't meet its specifications, back it goes. Regardless of stepping, revision, manufacture date, fab plant id, or anything else... Numbers on the top of the chip don't mean a thing without an encyclopedia from the vendor explaining the differences between various steppings. The write-up generally explains what the chip being discussed does, which is the important bit of data... your VIN on your auto contains a _lot_ of info. Do you use it? I don't. My insurance company does of course... but not me... > >How about this one.. an AYHJA core. These run 20% cooler than standard Tbird >cores. How do you know if you've got one? LOOK AT THE CHIP. Totally wrong example. We are not looking "at the chip" since we don't have it in our hands. We are looking at a picture that goes along with a long article that discusses the specific chip. That's a _big_ difference... > >Look at the AMD and Intel datasheets on their CPUs. Look at the information >on where it was made, the area where it shows the date (what week of the year) >it was made, etc. Another example.. Week 25 and newer Celeron 366's came with a >550MHz core. Every single one could do 550 at default voltage without problems >at all. I wonder how you could tell? Hrm.. perhaps by LOOKING AT THE CPU. :) So, >lets go back over this. By looking at the CPU you can figure out where it was >made (has an effect sometimes on overclockability), what stepping the CPU is and >you can possibly get a cooler running CPU. Yeah, looking at the CPU is useless. >Good one Hyatt, very amusing. :) Didn't say "looking at the CPU is useless". So your comment _is_ very amusing. We are talking about a _photograph_ of a chip we won't every have in our hands, along with a review of the chip that we can read to make conclusions... I don't see why that is so hard to understand...
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.