>Only the unregistered/registered part will make a
>difference there now, won't it?
For the FX, probably not, though I did read about a new stepping being launched with s939 that would increase SSE2 and/or memory performance as well. Probably noting major on its own, but since we are talking about cpu's that perform within a few percent of each other, every little bit helps.. We'll see soon enough though.
>So the benefit must lie in the very few percentage points
>from unbuffered RAM. I gave you my guestimate, time will prove me right or wrong.
I dug up some numbers for you. Have a look here:
<A HREF="http://www.x86-secret.com/articles/cpu/a64_3000/a64_3000-3.htm/" target="_new">http://www.x86-secret.com/articles/cpu/a64_3000/a64_3000-3.htm/</A>
THe biggest difference is going from ECC to non ECC, but if you compare registered+ecc to non registered+non ecc, differences can get a as big as 10% in both latency and throughput. THey only test one game bench (unreal) and with no detailed info and surprisingly low framerates, its a bit guessing, but that 3% delta in FPS actually correspond roughly with a speedgrade difference when I look at Tom's UT benches.
>P4 chipsets in general are old, but LGA775 and DDR2
>platforms with PCI-E will be brand-spanking new
New doesnt mean faster; just look at prescott. Like I said, neither PCI-E nor DDRII will give a performance boost IMHO.
>A64 will scale well, but Prescott's scaling is still very
>much a mistery. And even so, some parts will be "Manually
>scaled", like FSB and memory, within the next few months.
Correct, but memory will also be "scaled manually" for the A64. Prescotts fsb increase will probably help it not loosing too much from A64 as clockspeeds increase though, I agree with that. Especially as its FSB will be increased more than its clock.
>Intel sometimes surprises us
Oh yeah. Like with willamette, rdram, prescott

Seriously though, the only real rabbit I can see them pull out their hat is fixing whatever they messed up with prescott in the first place. And I'm guessing Prescott was supposed to have dynamic multithreading, which allows multithreading single threaded apps, and would make a lot of sense on such a deep pipelined cpu, BUT I'm ALSO guessing that is complex enough not to be able to fix it with just a stepping. Tejas might be interesting, but I wouldnt hold my breath for Prescott. Given the extreme low ammount of hype even intel is producing for Prescott or its new instruction, I think they gave up on it and now concentrate on a 64 bit DHT Tejas instead. Seems like DHT might be nice btw, and have a serious potential.
>Read: AMD still has a shrink to do, not only to take
>advantage of. It still has to be done,
Yes, which was my point; they may not even require it to keep at least parity with intel this year. AMD also seems very confident on and happy with their 90nm process, I'm not too worried.
> By then, Intel will have had time to update the prescott
>core for further scaling and upgrade their manufacturing
>techs.
I think there is nothing wrong with intel's 90nm process. Dothan will give us certainty, but I think everything that sucks about Prescott, is because of prescott, not the 90nm process.
= The views stated herein are my personal views, and not necessarily the views of my wife. =