On Thu, 2006-06-29 at 11:22 +0200, Jean-Lin Pacherie wrote:
As far as I read on web, the new "Core 2 Duo" introduces tremendous changes related to performance, heating and price. That's the reasons why I'm still waiting for the release. Well, I suppose if you compare Core 2 Duo (Pentium-M derived, from the looks of it) with the current Xeon (Pentium-4 based), the improvements are certainly significant. I think the Pentium-M is the best Intel has, far far better than anything based on the Pentium-4 core. Sure, the huge clock speeds do help for some things, but for most uses, and especially servers that do many different things, I find even the entry level AMD chips to perform far better. Two examples:
I set up ISPconfig on two machines. One a dual Xeon 3ghz, 1mb cache each server, proper Intel server board, 2gb ram, the other a desktop class box, VIA based mini-atx board with a 1.6ghz Sempron (the 64bit version, although I didn't know this when I installed so I loaded 32bit), with 1gb RAM. Guess what? The Sempron was a good 5 minutes quicker (both machines had websites and mail on, roughly the same load). The other example to me proves that the Pentium-3 really is a better multitasking chip than anything based on Pentium-4. A client has a Windows terminal server, and around 20 linux destops that are really just there for rdesktop. The terminal server is a dual 2ghz HT Xeon, 1mb cache per CPU, 2gb ram. The box didn't cope, load was almost permanently at 100%. They thought there was something wrong with the box, so they replaced it with another server that had completely different, but similar spec hardware. No joy. Someone sold them two secondhand dell servers, dual 1.1ghz P-3 with 1gb ram each. They replaced the terminal server with these two Dells, set them up identically, and put half of the clients on each. This worked great, with around 20% load on each. After a few months, the one server's motherboard failed, so the users on it were moved to the other server. So now we have all the users on *one* dual P-3. Guess what? It's coping marvellously. It shows around 60% CPU usage at the heaviest of times. The stuff that the clients use are MS Office, MS Great Plains, and two locally designed accounting packages, one of which tends to make the most modern desktops feel sluggish. Anyway, to end my ramble, I think that the P-4 based CPUs have never been the best option on the mark for any server work. I still continue to see Pentium-3 based boxes run circles around P-4 ones when the load gets heavy, not to mention the AMDs. I am really glad that Intel is finally moving the server chips over to the Pentium-M based design. It's far more powerful, and far more cool and quiet.
And if the promises and pre-benchmarks were too optimistic, then at least I will benefit from the new prices of the AMD processors :) The only ones I've seen use Intel supplied boxes, using pre-release chips, and the testers couldn't really fiddle with the box. I'm interested to see how they compare once the hardware sites can test with off-the-shelf kit.
Hans