Prescott 3.0E Overclocking Update (now with screenshot)

Neurorelay

Platinum Member
Jul 21, 2004
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My Original System Post


So I have had the system now for around three months. I think I found the sweet spot for overclocking it on air. I am running at 3455 mhz (230 x 15) with ram at 5:4 divider. Sisoft reports a 9730 for the cpu, with 4550 on ram. In 3Dmark 05, I receive a 4993 score on my 6800GT at 410/1100.

The tricky part was discovering that the board undervolts my cpu, so I had to compensate with a higher core voltage of 1.475v with an actual of 1.424v. DDR runs at 2.8v with agp at 1.6v.

I was able to attain 3775 (250 x 15), however, it would crash once in windows, a sure sign I need more advanced cooling. However, the gains to get to that speed would be minimal considering the cost.

Right now, considering the ABIT board reports temps higher then actual, I receive about 55c idle, and 75c load. Case temp stats between 25c idle, 30c load. And PWM 45c idle, 50c load.

So there you go, any comments suggestions or observations would be greatly appreciated and most assuredly welcomed.


Screenie Here
 

Budman

Lifer
Oct 9, 1999
10,980
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:cookie::wine:


I know wine & cookies don't go well together but we have no milk icon.
 

LTC8K6

Lifer
Mar 10, 2004
28,520
1,575
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But Prescott is a flame thrower......it's so hot you can't even cool it on air.......you shouldn't even bother buying one...... :D
 

phillyman36

Golden Member
Jun 28, 2004
1,789
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Hey Aristo Ive been debating on Northwood vs Prescott. What is this Do stepping and how can you tell if the cpu you want to buy has it (why does this make Prescott run cooler)
 

Nedder

Member
Oct 5, 2004
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Here's my results with a similar setup.

3.0e @3.3ghz (220fsb)
1:1 ram 2.5-3-3-8
Asus P4C800
2x512 OCZ pc3200 enhanced latency edition

idle - 49c
load - 62c
motherboard - 27c idle / 29c load
stock HSF
vcore 1.36

Sisoft Sandra

CPU:
9632 Dhrystone
3801 Whetstone / 6862 iSSE2

Mem:
5262mb/sec Int Buff
5299mb/sec Float Buff

I tried at 3.45ghz with vcore at 1.45v but prime95 gets SUMOUT errors after a few minutes. The Sisoft CPU was something like 10300 and mem jumped to 5600mb/sec. I'll need a better heatsink. The load temp was as high as 67c.
 

Neurorelay

Platinum Member
Jul 21, 2004
2,195
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Originally posted by: Nedder
Here's my results with a similar setup.

3.0e @3.3ghz (220fsb)
1:1 ram 2.5-3-3-8
Asus P4C800
2x512 OCZ pc3200 enhanced latency edition

idle - 49c
load - 62c
motherboard - 27c idle / 29c load
stock HSF
vcore 1.36

Sisoft Sandra

CPU:
9632 Dhrystone
3801 Whetstone / 6862 iSSE2

Mem:
5262mb/sec Int Buff
5299mb/sec Float Buff

I tried at 3.45ghz with vcore at 1.45v but prime95 gets SUMOUT errors after a few minutes. The Sisoft CPU was something like 10300 and mem jumped to 5600mb/sec. I'll need a better heatsink. The load temp was as high as 67c.

Yeah, that is about what I can get with a 1:1 ram ratio. I found that with the 5:4...I could get lower ram latencies and actually, bandwidth improved! Still though, would love to get some 6000+ results in bandwidth.

 

AristoV300

Golden Member
May 29, 2004
1,380
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Originally posted by: phillyman36
Hey Aristo Ive been debating on Northwood vs Prescott. What is this Do stepping and how can you tell if the cpu you want to buy has it (why does this make Prescott run cooler)


The D0 stepping is a newer revision of the chip that makes it overclock better and run cooler. Eventually they will be putting out an E0 stepping as well. 3.2e d0's tend hit 4ghz on on stock vcore. My northwood 3.0c would hit 3.6 on stock vcore. After 3.6 prescotts perform much better than northwoods.
 

Brutuscan

Member
Jun 11, 2003
36
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Nice OC ....

I have a 3.0e running on an Asus P4P800. I just built this system and have installed the Asus AiBooster, which using presets can adjust FSB by 20% to achieve a clock speed of ~ 3.6 gig.

Has anyone else used the AiBooster and just left the voltages as is?

My temperatures seem to stay pretty low, at stock setting I run around 41 deg c, max 47 deg C. Right now I am running at 219.98 FSB and an overall cpu speed of 3203.18 MHz, with the same temperatures. The CPU voltage is 1.42v.

As this is my first time OCing anything, it just seems a bit too easy.

Any thoughts?
 

IsaacInsoll

Junior Member
Jul 4, 2001
14
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How do you tell if it's a D0 stepping? Is there anything on the packaging or a way to check before you buy?
 

Nedder

Member
Oct 5, 2004
37
0
0
Brutuscan:

I find the Ai overclocking rather worthless. It gets impressive sounding cpu speeds but it clobbers memory performance.

E.g - When you set to 20% O/C in the Asus Ai option, it adjusts the ram to 3:2. Mem scores tumble of course. So you get a nice looking
cpu speed but it chokes the memory section. When I saw that I went and manually tweaked all the options to what they are now so
I could retain 1:1 with decent timings and a decent cpu O/C.
 

AristoV300

Golden Member
May 29, 2004
1,380
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Originally posted by: IsaacInsoll
How do you tell if it's a D0 stepping? Is there anything on the packaging or a way to check before you buy?

The SSpec code which is the last 5 digits on the retail box. The code is also on the heatspreader of the chip. You can match the steppings to SSpec code from here.