Celeron D; The new Prime95 CPU of choice?
 

[url]http://www.newegg.com/app/ViewProductDesc.asp?description=19-112-196&depa=0[/url]

This is the only Prescott i would recommend. It's cheap and apparently it does well with Prime95. The 256kB L2 cashe really does make a difference.

[QUOTE]Picked up a 2.66 Celeron D processor today and here are the benchmarks:

Intel(R) Celeron(R) CPU 2.66GHz
CPU speed: 2679.43 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2
L1 cache size: unknown
L2 cache size: 256 KB
L1 cache line size: unknown
L2 cache line size: 128 bytes
TLBS: 64
Prime95 version 23.4, RdtscTiming=1
Best time for 384K FFT length: 15.177 ms.
Best time for 448K FFT length: 18.420 ms.
Best time for 512K FFT length: 20.806 ms.
Best time for 640K FFT length: 24.767 ms.
Best time for 768K FFT length: 30.446 ms.
Best time for 896K FFT length: 37.686 ms.
Best time for 1024K FFT length: 40.710 ms.
Best time for 1280K FFT length: 54.671 ms.
Best time for 1536K FFT length: 68.034 ms.
Best time for 1792K FFT length: 82.818 ms.
Best time for 2048K FFT length: 91.397 ms.

On a dual channel Gigabyte 865 board.
[/QUOTE]

Here is a similar clocked northwood P4 with 512kB of L2

[QUOTE]
Intel(R) Pentium(R) 4 CPU 2.66GHz
CPU speed: 2651.82 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2
L1 cache size: 8 KB
L2 cache size: 512 KB
L1 cache line size: 64 bytes
L2 cache line size: 128 bytes
TLBS: 64
Prime95 version 23.4, RdtscTiming=1
Best time for 384K FFT length: 13.435 ms.
Best time for 448K FFT length: 15.856 ms.
Best time for 512K FFT length: 18.088 ms.
Best time for 640K FFT length: 21.716 ms.
Best time for 768K FFT length: 26.450 ms.
Best time for 896K FFT length: 31.368 ms.
Best time for 1024K FFT length: 35.274 ms.
Best time for 1280K FFT length: 46.212 ms.
Best time for 1536K FFT length: 56.942 ms.
Best time for 1792K FFT length: 67.556 ms.
[/QUOTE]

nice that helps thanks. begins to skeim about modding a comp to be neat just for looks mabey run some p95 muhahaha.

I think the P4 3.2 GHz Prescott could still compete with the Celeron D. I'm guessing the Prescott is around 27% faster than the Celeron D 2.66 GHz. Although the Prescott processor is 140% more expensive than the Celeron D, the whole system might be less than 27% more expensive.

This is especially true if you take the cost of the electricity into account. The breakpoint for the prices I would pay is 15 months of continuous use. After that the P4 Prescott is cheaper (assuming each taking around 120 W).

Of course, getting hold of a Northwood to the same price as the Prescott would be much better than any of those alternatives.

Edit: Here I considered the 478-pin Prescott, for which one could find a cheaper motherboard.

I think the Celeron D will use less power than the Prescott P4. If I am reading this page right then the Celeron D uses 94W max whereas the 3.2 P4 uses 127W max (both socket 478 versions). [url]http://www.sandpile.org/impl/p4.htm[/url] I don't know how this compares to real world usage though, especially once both systems are overclocked and running Prime95.

Here are some more promising results from the celeron D!

"Stock speed is 2.4GHz which I found useless to bench.
FSB=194@3.5GHz mem samsung ddr400 2.5/6/3/3"

Intel(R) Celeron(R) CPU 2.40GHz
CPU speed: 3501.12 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2
L1 cache size: unknown
L2 cache size: 256 KB
L1 cache line size: unknown
L2 cache line size: 128 bytes
TLBS: 64
Prime95 version 23.8, RdtscTiming=1
Best time for 384K FFT length: 11.475 ms.
Best time for 448K FFT length: 13.919 ms.
Best time for 512K FFT length: 15.758 ms.
Best time for 640K FFT length: 18.768 ms.
Best time for 768K FFT length: 23.007 ms.
Best time for 896K FFT length: 28.482 ms.
Best time for 1024K FFT length: 31.008 ms.
Best time for 1280K FFT length: 41.125 ms.
Best time for 1536K FFT length: 51.148 ms.
Best time for 1792K FFT length: 62.748 ms.
Best time for 2048K FFT length: 69.811 ms.

Here are results from a similar Northwood P4:

Intel(R) Pentium(R) 4 CPU 3.00GHz
CPU speed: 3449.81 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2
L1 cache size: 8 KB
L2 cache size: 512 KB
L1 cache line size: 64 bytes
L2 cache line size: 128 bytes
TLBS: 64
Prime95 version 23.8, RdtscTiming=1
Best time for 384K FFT length: 10.352 ms.
Best time for 448K FFT length: 12.340 ms.
Best time for 512K FFT length: 14.083 ms.
Best time for 640K FFT length: 16.868 ms.
Best time for 768K FFT length: 20.582 ms.
Best time for 896K FFT length: 24.329 ms.
Best time for 1024K FFT length: 27.112 ms.
Best time for 1280K FFT length: 35.460 ms.
Best time for 1536K FFT length: 43.761 ms.
Best time for 1792K FFT length: 51.946 ms.
Best time for 2048K FFT length: 58.560 ms.

I'm surprised how well these chips are overclocking. I've just recieved another report of a 2.4ghz Celeron D Prime95 stable at 3.4ghz on the stock cooler. I'm also in contact with someone that is willing to put a Celeron D on Vaporchill! That is going to be interesting...

Please put "FullBench=1" in prime.ini before you run the benchmark...

Here's an O/C'd P4c .. has been running stable at this speed for over six months .. even through our very hot summer up here ..

Intel(R) Pentium(R) 4 CPU 2.60GHz
CPU speed: 3120.87 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2
L1 cache size: 8 KB
L2 cache size: 512 KB
L1 cache line size: 64 bytes
L2 cache line size: 128 bytes
TLBS: 64
Prime95 version 23.8, RdtscTiming=1
Best time for 384K FFT length: 12.167 ms.
Best time for 448K FFT length: 14.564 ms.
Best time for 512K FFT length: 16.662 ms.
Best time for 640K FFT length: 19.886 ms.
Best time for 768K FFT length: 24.254 ms.
Best time for 896K FFT length: 28.519 ms.
Best time for 1024K FFT length: 32.008 ms.
Best time for 1280K FFT length: 41.999 ms.
Best time for 1536K FFT length: 51.563 ms.
Best time for 1792K FFT length: 61.364 ms.
Best time for 2048K FFT length: 69.719 ms.
Best time for 2560K FFT length: 89.573 ms.
Best time for 3072K FFT length: 108.989 ms.
Best time for 3584K FFT length: 135.199 ms.
Best time for 4096K FFT length: 152.498 ms.

Overclocking a Celeron D to some 3.x GHz shouldn't cause too much trouble, since these chips come from the same wafers as the 3.x GHz Prescotts using the same die. Possible reasons for that they became a "Celeron D" are cache defects, a too high individual max. TDP at clockspeeds needed for a Prescott or just market requirements. You surely remember the "50 mio. HT enabled P4s sold" news just some weeks ago. This means, that most CPUs sold by Intel (70%-80%) are Celerons.

A Celeron D overclocker should hope, that it's not the second given reason (TDP), which made his die a Celeron :wink: The production variances (e.g. leakage, max. TDP) are high at 90nm.

I just compared some prices again and browsed through the forums for benchmarks. It seems that the Celeron D may compete after all with the P4 Prescott. (The Northwood isn't available here anymore, except for the extreme edition with L3 cache.)

It is the new Celeron D 345 3.06 GHz that seems to be best for my systems. But the P4 Prescott 3.20 GHz is almost as good.

The per-iteration prices are finally coming down to the levels that Northwood had when they stopped selling it after the summer.
[CODE][SIZE=2]2004-12-22 CPU other Iteration time Cost
Item price costs Total 1536K 768K 1536K 768K
Socket 478 CPU:s (SEK) (SEK) (SEK) (ms) (ms) (micro-SEK/iteration)
Celeron D 315 2.26 GHz 533 MHz 571 5207 5778 80 ? 35.5 ? 4.9 2.2
Celeron D 320 2.40 GHz 533 MHz 611 5207 5818 75 33.5 4.6 2.1
Celeron D 325 2.53 GHz 533 MHz 760 5207 5967 72 ? 32 ? 4.5 2.0
Celeron D 330 2.66 GHz 533 MHz 798 5207 6005 68 30.5 @ dual ch 4.3 1.9
Celeron D 335 2.80 GHz 533 MHz 989 5207 6196 65 ? 29 ? 4.3 1.9
Celeron D 340 2.93 GHz 533 MHz 1125 5207 6332 62 ? 27.5 ? 4.1 1.8
Celeron D 345 3.06 GHz 533 MHz 1240 5207 6447 59 ? 26.5 ? 4.0 1.8
P4 Prescott 2.80 533 MHz 1576 5207 6783 59 28 4.2 2.0
P4 Prescott 2.80 800 MHz 1550 5207 6757 61 28.5 4.4 2.0
P4 Prescott 3.00 800 MHz 1600 5207 6807 57 26.5 4.1 1.9
P4 Prescott 3.20 800 MHz 1932 5207 7139 53 ? 25 ? 4.0 1.9
Socket 775 CPU:s
Celeron D 325J 2.53 GHz 533 MHz 706 5399 6105 72 ? 32 ? 4.6 2.1
Celeron D 330J 2.66 GHz 533 MHz 741 5399 6140 68 ? 30 ? 4.4 1.9
Celeron D 335J 2.80 GHz 533 MHz 919 5399 6318 65 ? 28.5 ? 4.3 1.9
Celeron D 340J 2.93 GHz 533 MHz 1125 5399 6524 62 ? 27 ? 4.3 1.9
P4 Prescott 520 2.80 800 MHz FC-LGA 1423 5399 6822 61 ? 28.5 ? 4.4 2.1
P4 Prescott 520J 2.80 800 MHz FC-LGA 1436 5399 6835 61 ? 28.5 ? 4.4 2.1
P4 Prescott 530 3.00 800 MHz FC-LGA 1606 5399 7005 57 26.5 4.2 2.0
P4 Prescott 530J 3.00 800 MHz FC-LGA 1611 5399 7010 57 ? 26.5 ? 4.2 2.0
P4 Prescott 540 3.20 800 MHz FC-LGA 1940 5399 7339 54 25 4.2 1.9
P4 Prescott 540J 3.20 800 MHz FC-LGA 1945 5399 7344 53 ? 25 ? 4.1 1.9
P4 Prescott 550 3.40 800 MHz FC-LGA 2443 5399 7842 50 23.5 4.1 1.9
P4 Prescott 550J 3.40 800 MHz FC-LGA 2464 5399 7863 50 ? 23.5 ? 4.2 2.0
P4 Prescott 560 3.60 800 MHz FC-LGA 3643 5399 9042 48 ? 22 ? 4.6 2.1
P4 Prescott 560J 3.60 800 MHz FC-LGA 3686 5399 9085 48 ? 22 ? 4.6 2.1
P4 Prescott 570 3.80 800 MHz FC-LGA 5565 5399 10964 45 ? 21 ? 5.2 2.4
Other costs
Kingston 256 MB PC3200 CAS 2.5 434 ? = calculated from other CPU speed
Maxtor, DiamondMax Plus 8 40GB 389
Compucase Miditower CI-6A21 300W 750
Papst case fan 120 mm 169
ASUS P4S800 (if S478) 585
ASUS P5P800 (if S775) 777
Electricity 3yrs at 120W at SEK 0.9125/kWh 2880
[/SIZE][/CODE]

celeron d 330 and 330j
 

What's the difference between these two?

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[url]http://www.ebuyer.com/customer/products/index.html?rb=4602347988&action=c2hvd19wcm9kdWN0X292ZXJ2aWV3&product_uid=77751[/url]

Thanks for any help.