ed stroglio at overclockers did an article about it, <A HREF="http://www.overclockers.com/tips00323/" target="_new">here</A>, and he said the patent stems from 1999 (when it was first applied for), when intel was blamed for selling overclocked chips or something like that, or perhaps it was retailers who were being blamed. in any case they wanted to prevent anything like that from going on and were trying to create a way to safeguard a chip's frequency. intel's problems have changed over the years though, so i'm not sure they're concerned with this problem at the moment.
check out ed's article
amd has to pay them royalties to build cpus don't they?
I don't know.
All I do know is AMD has been a thorn in Intel's side ever since the 8086 + 8087 days.
IIRC, Intel contracted AMD to supplement Intel's chip production in order to meet demand. AMD took advantage of the contract and continued to clone Intel chips for years. They figured as long as Intel was still using x87 FP code AMD still had a right to clone the chips, even the revised ones, 80286, 80386, and i486.
Somewhere Intel got smart and started patenting technologies which AMD could not clone.
Lawsuits went on for years. I don't know how they ended (if they ended).
Well, that's the way I think things went.
<b>99% is great, unless you are talking about system stability</b><P ID="edit"><FONT SIZE=-1><EM>Edited by phsstpok on 03/27/03 11:01 PM.</EM></FONT></P>
Yeah, there was a big fuss a few years back. Certain retailers were selling overclocked chips in prebuilt (or custom built, whatever)PCs. At that time intel started doing research to combat it. AMD, while certainly not pleased at customers being taken advantage of, seemed to be almost proud of the fact that in most cases, it was their chips that were so easily being overclocked.
I wonder how often that sort of cheating goes on today.
AMD also added anti-overclocking by locking the multipliers but this only stopped the casual, would-be, overclocker. People who weren't afraid to take out their CPU and paint or pencil the bridges could easily (relatively) overclock. This mostly would only be enthusiastists but I suppose unscrupulous VARs could still overclock.
I wonder what percentage of AMD powered PCs are overclocked today? For that matter what percentage of the do-it-yourself PCs are overclocked? It would be interesting to know the answers.
<b>99% is great, unless you are talking about system stability</b>