Xeon?

[Henry Rollins II]

Is this cpu just a version of the P4? It is availble at the same speeds and at about the same price...and only with mobos that cost like $900.

regards,
Henry.

[rogerdugans]

I am just starting on the learning curve so I am not yet(!) a Xeon wizard, but they are not the same: Xeon's have more on-die cache I believe, and better performance- especially in SMP systems- Duallie/ Quad etc.

They are released later than the "consumer" chips, like P3, P4 and at slower clock speeds initially, but they are based on the same core usually I believe.

[donny_paycheck]

The P4 Xeons are the same as regular P4s, cache and all. They go in a different socket (603) but otherwise are identical under a microscope. P2 and P3 Xeons go in a slot 2 board and can have larger L2 caches (off chip) all the way up to 2mb! They start at 512kb I think, but go all the way up to 2mb! The big cache makes them annihilate in SMP setups. They are also scalable up to 8 processors.

I don't know why the P4 Xeons aren't anything special really. The Athlon MPs mutilate them in performance, a relationship analogous to a regular P4 vs. an Athlon XP.

[Henry Rollins II]

Originally posted by donny_paycheck
The P4 Xeons are the same as regular P4s, cache and all. They go in a different socket (603) but otherwise are identical under a microscope. P2 and P3 Xeons go in a slot 2 board and can have larger L2 caches (off chip) all the way up to 2mb! They start at 512kb I think, but go all the way up to 2mb! The big cache makes them annihilate in SMP setups. They are also scalable up to 8 processors.

I don't know why the P4 Xeons aren't anything special really. The Athlon MPs mutilate them in performance, a relationship analogous to a regular P4 vs. an Athlon XP.

Man u got Xeon! 2 mb version....didn´t they cost like $1500 each?!?

regards,
Henry.

[donny_paycheck]

Originally posted by Henry Rollins II


Man u got Xeon! 2 mb version....didn´t they cost like $1500 each?!?

regards,
Henry.

Nah, I got 'em for free from a friend but the P2 versions only go for $100 max on ebay usually, the 2mb versions too. A P3 Xeon at 1ghz with a 2mb cache will run you $1500 though!

[SP]

P4 Xeons support SMP whereas regular P4s do not contrary to any rumors you may have heard. Whether or not future regular P4s will support SMP, I don't know. Also the latest Prestonia Xeons support SMT or hyperthreading. Foster Xeons and regular P4s (both Willamete and Northwood) do not support Hyperhtreading. The flags inside the processors on those chips are set to indicate Hyperhtreading support but only one logical processor per Physical processor thus there is no real Hyperhtreading support as there is with Prestonia Xeons and Xeon MPs.

Xeon MPs feature L3 cache of upto 2MB I beleive in addition to the L2 cache and they support at least 4-way SMP (and perhaps higher) whereas the Xeons I mentioned in the Previous paragraph only support 2-way SMP. Xeon MPs should be available by now or very soon but they are rare and expensive. I'm not sure about exact prices for Xeon MPs but I know they start in the 4 digit range.

[donny_paycheck]

Originally posted by SP
Xeon MPs feature L3 cache of upto 2MB I beleive in addition to the L2 cache and they support at least 4-way SMP (and perhaps higher) whereas the Xeons I mentioned in the Previous paragraph only support 2-way SMP. Xeon MPs should be available by now or very soon but they are rare and expensive. I'm not sure about exact prices for Xeon MPs but I know they start in the 4 digit range.

Is the Xeon MP a socket 603 CPU? I haven't ever seen these but I was suspicious of the P4 Xeons, I didn't think Intel would abandon the monster caches of the past so easily.

[Henry Rollins II]

A local supplier has about a dozen versions of the xeon´s, here is a few price examples of these:

XEON 700MHz 1Mb: $1700
XEON 1700MHz/1.7GHz 256Kb: $370
XEON 2000MHz/2.0GHz 256Kb : $730

Prices assume that 1 $ = 10 sek.

regards,
Henry.