benchmarks of o/c'd prescott and NW?

[gregs45s]

Has anyone compared sidebyside benchmarks of an overclocked prescott and northwood, at the same clock speed to see which scores faster? Ive heard the prescott runs away over 3.6ghz, but want to see proof.

 

[batboy]

Default speed Northwood 2.8C vs. default speed Prescott 2.8E

Sandra CPU ALU:
2.8C=8768, 2.8E=8170

Sandra CPU FPU:
2.8C=2425/5283, 2.8E=2292/4807

Sandra memory bandwidth:
2.8C=4890/4859, 2.8E=4961/4964

PCmark2002 CPU
2.8C=6920, 2.8E=5930

PCmark2002 memory
2.8C=9488, 2.8E=11016

PCmark2002 HDD
2.8C=1281, 2.8E=1270

PCmark2004
2.8C=4416, 2.8E=4383

3Dmark2001 (Radeon 9700 Pro at default speed and settings)
2.8C=16047, 2.8E=16017


COMPARISON OF 2.8C VS. 2.8E BOTH OVERCLOCKED TO 3.4 GIG

Sandra CPU ALU:
2.8C/3.4=10363, 2.8E/3.4=9998

Sandra CPU FPU:
2.8C/3.4=2947/6469, 2.8E/3.4=2783/5864

Sandra memory bandwidth:
2.8C/3.4=5876/5791, 2.8E/3.4=5919/5919

PCmark2002 CPU
2.8C/3.4=8437, 2.8E/3.4=7190

PCmark2002 memory
2.8C/3.4=10955, 2.8E/3.4=12549

PCmark2002 HDD
2.8C/3.4=1299, 2.8E/3.4=1279

PCmark2004
2.8C/3.4=5259, 2.8E/3.4=5222

3Dmark2001 (Radeon 9700 Pro at default speed and settings)
2.8C/3.4=17138, 2.8E/3.4=17129


NOTE: used the same exact system and settings with the only change being the CPU

 

[gregs45s]

Pretty close on some benchmarks I guess. Wonder what it would look like at a higher clock. Were you able to hit 3.6?

 

[batboy]

My 2.8C will only go to 3.5 gig, so I didn't run a comparison at 3.6 gig. I did benchmark the 2.8E at 3.8 gig though.

Prescott benchies for 3.8 gig.

Sandra CPU ALU: 11193

Sandra CPU FPU: 3121/6557

Sandra memory bandwidth: 6062/6044

PCmark2002 CPU: 8041

PCmark2002 memory: 13413

PCmark2002 HDD: 1329

3Dmark2001 (Radeon 9700 Pro at default speed and settings): 17705

Note: The first two sets of benchmarks were with PC4000 RAM using the 1:1 ratio. The benchmarks ran at 3.8 gig was used with Mushkin PC3500 RAM with the 5:4 ratio.

The Prescott is starting to come alive more and more as the speed scales up. If you are seriously considering the Prescott, be aware they run lots hotter. The new and improved stepping will be released in May. I recommend waiting for the new stepping.

 

[Edge386]

Ive gotten good results with my 2.8c D1 as well, just about what Batboy posted, guess what, THIS IS MY 100th POST!!! Woopity Dee!

 

[gregs45s]

Yeah it does look like it comes alive at higher clocks. Im thinking about going prescott eventually, before it leaves the 478 socket. Figure I may go H2O cooling, but may keep air. My core voltages are more stable since I added the dps2 to my board, and it has a fan to cool the extra power supply. I figure it will handle the demand better then some of the other boards with the mosfets totally on the board. Curious if anyone else has loaded a pres-hott on a gigabyte board with dps2 yet?

 

[GST-97]

Batboy: I am questioning your Sandra numbers a little bit.

For that 2.8E @ 3.4, you say the prescott scored 9998 Mips and your FPU scores were 2783/5864?

my 2.8E @ 3.5 gets around 9250 for Mips, but the FPU is 4045/7330

How could there be such a huge difference? Do you have an old version of Sandra or something?

My PCmark2k2 score is right about where yours is, its at 7320, which is probably about right for 100 Mhz more clockspeed.

Just curious

-Chris

 

[batboy]

Yeah you are right, I was using Sandra 2003 for those tests. I have since installed Sandra 2004, but I'm too lazy to repeat the tests. However, since my results are using the same components and same software, the comparisons are still quite valid.

I have my Prescott rig completely tore down right now. Just got a "new used" IC7-G that I'm installing mosfet heatsinks and modding the N/B cooling. Was hoping to finish work on it this weekend before going out of town for work next week, but yard work is slowing me down.

 

[GST-97]

Batboy: I agree, the comparison is still valid.... now at least I know why the numbers were so different from mine though

Is better cooling on the NB's important? even running at 3.5 on a 250 FSB, I have never seen my NB temp go over 26C (at least.. as stated by Abit EQ on my AI7)

-Chris

 

[batboy]

Stock N/B cooling is perfectly fine for up to 250 FSB. But, I have a 2.4C that can run nearly 300 FSB and my 2.8E prescott will go above 280 FSB, so it's nice to have better N/B cooling at those higher FSB speeds.

 

[Lancelot]

Batboy: I am questioning your Sandra numbers a little bit.

For that 2.8E @ 3.4, you say the prescott scored 9998 Mips and your FPU scores were 2783/5864?

my 2.8E @ 3.5 gets around 9250 for Mips, but the FPU is 4045/7330

How could there be such a huge difference? Do you have an old version of Sandra or something?

My PCmark2k2 score is right about where yours is, its at 7320, which is probably about right for 100 Mhz more clockspeed.

Just curious

-Chris

I guess it all depends on the combination of memory amount, timings, and the divider used. My 2.8E @3.4 scores 10.008 MIPS but memory timings are lower due to a 5:4 divider (195Mhz)

 

[danman81]

I agree that the prescott is great at overclocking if you have at least water cooling becuase they are designed from the ground up for higher clock speeds, at least 3.6 and higher. i am waiting for the new stepping to come out hopefully very soon READ THIS THREAD ITS AWESOME:

http://www.ocforums.com/showthread.php?s=&threadid=293795