p4 2.5 or 2.8

watts3000

Senior member
Aug 8, 2001
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I would like to know is there a huge difference in the 2.5 p4 and the 2.8 p4. Is the 2.8 a lot faster or is it something you will not notice with the natural eye.
 

sharkeeper

Lifer
Jan 13, 2001
10,886
2
0
Your wallet will feel a lot lighter if you buy the 2.8!

I got the 2.53 and run it at 2850. :)

Cheers!
 

dullard

Elite Member
May 21, 2001
26,078
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One question: were you talking about the 2.5 GHz P4 on a 400 MHz fsb, or the 2.53 GHz P4 on a 533 MHz fsb?

Most people cannot notice a speed difference unless chips are at least 10% apart. The 2.8 GHz P4 is just about 10% faster than the 2.53 GHz P4 on a 533 MHz fsb. So you may or may not be able to sense a tiny speed difference. In that case, due to the extreme price difference, I'd get the 2.53 GHz P4 (Actually I'd get the 2.4 GHz P4 on a 533 MHz fsb and upgrade later, but that is since I'm really cheap).

The 2.5 GHz P4 on a 400 MHz fsb is beginning to be held back by its slower fsb speed. In that case, I think you would definately notice a small speed difference between it and the 2.8 GHz P4. Plus your upgrade path would be blocked since I don't think Intel will go much farther with the 400 MHz fsb chips.
 

halkebul

Senior member
Aug 26, 2002
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The 2.8 (533MHz FSB) cost too much and the 2.5 (400MHz FSB) is a risky overclocker, that is to say, it is unacceptably possible that you will end up with a FSB significantly less than the now common 533MHz FSB. The best choice would neither be the 2.8 nor the 2.5 but rather the 2.53 (533MHz FSB) as you can easily obtain 2.8GHz+ and 533MHz+ FSB on stock cooling. In either case overclocking will save you big $$$. And Intel can't tell if ya overclocked the cpu. In other words, don't worry about voiding your warranty by overclocking.


2.53 (533MHz FSB) $241 at googleGear.com
2.8 (533MHz FSB) $477 at googleGear.com
2.5 (400MHz FSB) $256 at newegg.com
 

Alptraum

Golden Member
Sep 18, 2002
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2.53 (533MHz FSB) $394 at googleGear.com
2.8 (533MHz FSB) $486 at googleGear.com
2.5 (400MHz FSB) $242 at googleGear.com



Your prices are off. the 533FSB 2.5 is 242. the 400FSB 2.6 is 394.
 

BDawg

Lifer
Oct 31, 2000
11,631
2
0
So, it's better to get a 533MHz chip and try to push it to 533+ than to get a 400MHz chip and try to push it to 533?
 

Alptraum

Golden Member
Sep 18, 2002
1,078
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So, it's better to get a 533MHz chip and try to push it to 533+ than to get a 400MHz chip and try to push it to 533?

Yep. The 533FSB 2.5 is I think the best bang for the buck in the P4 world right now. It was even down to 232 at googlegear last week. Back up to 242 though :( heh
 

Rankor

Golden Member
Jul 10, 2000
1,667
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I would get the the 2.53 (533) as it can be had for $250 US in some places; 2.5 (400) if you're motherboard doesn't support the 533 fsb.

The only difference between 2.5x and 2.8 is the price premium, ~300Mhz difference in speed, and (depending on w/c 2.5x proc you may get) the 400/533 fsb.

I (personally) cannot justify purchasing a proc for ~half a grand after tax; some can.
 

oldfart

Lifer
Dec 2, 1999
10,207
0
0
Best bang for the $$ is the 2.4B 533 FSB for under $200. Its 1/2 the price of the 2.53 for a tiny decrease in performance.
 

Alptraum

Golden Member
Sep 18, 2002
1,078
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Best bang for the $$ is the 2.4B 533 FSB for under $200. Its 1/2 the price of the 2.53 for a tiny decrease in performance.

I agree that the 2.4 isnt a bad deal but its only $50 less not half the price. Prices as of this morning at googlegear are $242 for the 2.53 533FSB and $192 for the 2.4 533FSB. I think the $50 is not that big of a deal to go one step further up the chain. But thats me :)
 

halkebul

Senior member
Aug 26, 2002
320
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"Best bang for the $$ is the 2.4B 533 FSB for under $200. Its 1/2 the price of the 2.53 for a tiny decrease in performance"

Good suggestion, but if your looking purely at bang-for-your-buck-northwoods, the 1.8A ($140 at newEgg.com) is still the champ. By getting a 1.8A and increasing the FSB from 100MHz (400Mhz quad-pumped) to 133Mhz (533Mhz quad-pumped), you can obtain a processor virtually identical to the 2.4B - saving ~$50 in the process.;)
 

oldfart

Lifer
Dec 2, 1999
10,207
0
0
Yeah, I know. I run a 1.6A @ 2.4 GHz DDR400 myself. The things is, not everyone overclocks. For a stock clock speed setup, the 2.4B is the best value @ $200.
 

Alptraum

Golden Member
Sep 18, 2002
1,078
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Yeah, I know. I run a 1.6A @ 2.4 GHz DDR400 myself. The things is, not everyone overclocks. For a stock clock speed setup, the 2.4B is the best value @ $200.

Yeah, for me overclocking isnt worth my time. I used to a few years ago. But now after spending the last few years working on network hardware/software and servers all day the LAST thing I want to do is come home and tinker with my own crap, lol. For me its worth spending a couple hundred bucks to have the fastest or nearly fastest CPU right out of the box without doing anything to it. I still think the 2.5 is a good deal at only $50 more then the 2.4 but the 2.4 is a good deal also.
 

oldfart

Lifer
Dec 2, 1999
10,207
0
0
I'd still take a 2.4B over a 2.5 if you are not overclocking.
2.4B = 533 FSB
2.5 = 400 FSB

When Ibought my 1.6A, there were no 533 FSB CPU's available. The best (and very $$$) CPU was the 2.2 which also is a 400 FSB part. For less $$ I got a 2.4 GHz, 600 FSB setup running DDR400 that was not available at any price at that time.
 

BFG10K

Lifer
Aug 14, 2000
22,709
3,004
126
Buy the fastest you can afford and stay away from 400 MHz FSB CPUs if you don't plan to overclock.
 

MIGhunter

Senior member
Aug 16, 2002
305
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I have a 2.8. If you take stock in benchmarks, the difference between my 2.8 and someone elses 2.53 in 3dmark2001, is nothing. Everyone had identical 15000 scores. Of course I couldn't find one that specifically said they weren't overclocking anything. But you could probably spend a little less and get the 2.53 and be just as happy.
 

NOX

Diamond Member
Oct 11, 1999
4,077
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Man I'm VERY happy with my 2.26GHz. It is very fast if you ask me, even faster when your RAM is running at DDR356, and using RAID0. :D