Pentium 4 630 or 570, which is better?

I've been thinking of upgrading my z81sp from a 630 @ 3.0ghz to the 570 @ 3.8ghz (the 670 is a rip-off). What are the differences between the chips? Will having the faster clock speed benefit me in CPU intensive games like the upcoming Crysis (it's gonna have a hardcore physics system), or would I be better off just spending the money on more RAM?

 

The Difference between the two chips is...

P4 570: 3.8GHz, 1MB L2 Cache, no speedstep, no EM64T
P4 630: 3.0GHz, 2MB L2 Cache, speedstep, EM64T

they're both have 90nm, HTT, 800MHz FSB, execute disable bit

So really,

1. I don't think Crysis will utilize 64bit, and EM64T is emulated 64bit, not like AMD's native x64 support, so I'd buy a 570 to replace your 630.
2. You're losing 1MB of L2 cache by going 630 to 570, but you're getting a 800MHz increase in frequency, which will give you more performance than a 3.0GHz w/ 2MB l2 cache.
3. speedstep is not necessary unless you really want to save extra power by throttling down when you're idle. But really, how much $ do u actually save if you had speedstep to throttle down the cpu when you're not using it?? If power consumption matters that much, why not just upgrade to a Core 2 Duo. I'd say, buy the 570 to replace the 630.
4. the 630 has 64 bit, the 570 doesn't. SO what. Vista runs best on x64, but really, the EM64T on Pentium 4 is EMULATED. It's not like the native x64 on AMD processors. You won't benefit from EM64T w/ gaming.

So those are my 4 reasons why to get a 570 to replace the newer 630 with a lower clock speed.

Even better, why not overclock the 630 to 3.8GHz and it'll become a 670? I mean, the 630 has all the latest features for the Pentium 4, and it's only lacking in the frequency, so just oc the 670 to 3.8GHz and you pay nothing.

Hope that helps.

 

570 will be far too hot.

 

I would attempt an overclock first!

 

The Z81SP can handle the heat from both processors so I wouldn't worry about that. I would suggest getting a cooling pad with that notebook though.

The 2MB vs. 1MB cache doesn't make much of a difference in the Pentium 4 as far as I know, and there is certainly no way that it nor any other features of the 630 can make up for the 800MHz clockspeed gap between it and the 570. If you want to "upgrade", go for the 570. A lot of stuff these days requires more than a 3.0GHz Pentium 4 (or at least, it is recommended that you have a 3.0GHz+ CPU).

 

The 570 will be hot because it uses the Prescott core, I would look at a 651, as that uses the much cooler Cedar Mill core.

 

I don't think Crysis will utilize 64bit,

According to the wiki article on Crysis, Crytek will be releasing a 64bit version that they promise will see performance gains of 10-15% per thread when running in 64bit mode.

EM64T is emulated 64bit, not like AMD's native x64 support

All of the articles that I have read said that intel basically ripped off the amd64 architecture and that their are few differences

P4 570: 3.8GHz, 1MB L2 Cache, no speedstep, no EM64T


Uh, actually the 500 series was the first 64bit intel architecture

http://www.xbitlabs.com/news/cpu/display/20050506032247.html