Finally OCed my 2.6C, heres the results (question about temp)

[SpeedFreak03]

I have a P4 2.6C (SL6WS MALAY if that means anything), Asus P4P800 Deluxe, Intel Retail HSF, Artic Silver 5 (on HSF and northbridge cooler) and 1GB kit (2x512MB) of PC3200 running in dual channel. Anyway, I finally got around to o/cing this monster. I used the AI Tuner feature in the BIOS, and set it for a 10% O/C, along with Turbo mode (turbo wont boot with stock settings), and memory acceleration enabled. I booted up and started CPU-Z, and found the following:
CPU Tab:
Voltage - 1.552 v
Core Speed - 2859 MHz
Multiplier - x 13.0
FSB - 220 MHz
Bus Speed - 880 MHz

Memory Tab:
Size - 1024 MBytes
Performance Mode - Disabled
Channels # - Dual
Frequency - 146 MHz (need to make this higher lol)
FSB: DRAM - 3:2 (want 5:4)
CAS Latency - 2.5 Clocks

Currently at 100% load (using Prime95, SETI@HOME, 17orbust, and chessbrain to stress it), and CPU temp (MBM5) is 44C. So how does it look? I want to run it at 5:4 but I cant find the ratio setting in the BIOS (if any P4P800 owners know how to run the memory at 5:4 please tell me!
Using this info, im gonna go into the BIOS and set it all up manually myself (the AI Tuner does it automatically so the settings are a suprise), then Im gonna shoot higher.

Cliffnotes:

1. Is 44C full load an ok temp? It seems stable but I dont wanna kill anything.
2. How do you set up the P4P800 to use the 5:4 memory divider?

-Josh

 

[Corporate Thug]

my full load temps get in the mid 50's so 44 is great

 

[SpeedFreak03]

I just ran SiSoft Sandra 2004 Standard, and I did the CPU Arithmetic Benchmark, and scored Dhrystone 8150MIPS, and Whetstone FPU/iSSE2 3242/6146 MFLOPS. I did the compare thing, and a P4 3.2C only gets 7869MIPS and 2365/4325 MFLOPS! Now at pretty much idle (like 5% load) my temp is 29~32C (fluctuates). What number/benchmark are people talking about when they say "I scored xxx in Sandra"? So far im pretty happy with this box!

-Josh

 

[SpeedFreak03]

Originally posted by: shady06
my full load temps get in the mid 50's so 44 is great

Thats good to hear then. I thought that you were supposed to stay under 40 though? In that case its time to crank up the FSB!

-Josh

 

[Corporate Thug]

that the number they are referring to (the MFLOPS)

 

[Corporate Thug]

Originally posted by: SpeedFreak03

Originally posted by: shady06
my full load temps get in the mid 50's so 44 is great

Thats good to hear then. I thought that you were supposed to stay under 40 though? In that case its time to crank up the FSB!

-Josh

i would think anyone who stays under 40C under full on air cooling has faulty temp sensors

 

[SpeedFreak03]

Whoa something is going on with the CPU voltage. I ran CPU-Z to look at something, and the voltage said 1.600! Why did it change? I didnt touch anything yet (not even AI Tuner)! And for sandra, then I would say "I scored 3242/6146 on sandra" or just "I scored 6146? lol im not gonna brag or nothing I just wanna be able to compare mine with other systems.

 

[SpeedFreak03]

Originally posted by: shady06

Originally posted by: SpeedFreak03

Originally posted by: shady06
my full load temps get in the mid 50's so 44 is great

Thats good to hear then. I thought that you were supposed to stay under 40 though? In that case its time to crank up the FSB!

-Josh

i would think anyone who stays under 40C under full on air cooling has faulty temp sensors

Thats a relief then, cause I thought my new CPU was burnin' up! Im gonna go crank up the FSB (and try to find 5:4 divider) and report back.

-Josh

 

[SpeedFreak03]

OK, I played around a little, and Im at 2990MHz (230x13). But the real accomplishment was that I got the ram up to 184MHz, 5:4 divider! I started my little stress testing thing (same as in first post), and its been about 5 minutes, with the temp at 44C still. I will let it go a little longer before I go any higher (3GHz is all I wanted out of this setup and im there)! But I have a question about the CPU voltage. In the BIOS I set it to 1.550V, but in CPU-Z it flucuates between 1.568~1.600! I read that over 1.6V is too much, so which should I pay attention to? CPU-Z or BIOS?

-Josh

 

[SpeedFreak03]

I just got back on, and im at 47C, but its still stable as ever! Im gonna go higher now....wish me luck lol

-Josh

 

[SpeedFreak03]

OK im at 3120MHz, 240FSB, 192MHz memory frequency (5:4), and 1.5625V in the BIOS, but it still says 1.600V in CPU-Z. Full load is 47C, and stable (knock on wood)! Im gonna take a little break now and then im gonna go for 250FSB! So yea I would recommend this combo . Im gonna benchmark with Sandra again in like 10 minutes and ill report back.

-Josh

PS If anyone else is wondering how to set up the memory divider, for "DRAM Frequency", there is 400MHz, 320MHz, and 266MHz (and Auto). 400MHz = 1:1, 320MHz = 5:4, and 266MHz = 3:2. I don't know what the MHz has to do with the memory frequency, but I have tested and confirmed that those are correct.

 

[SpeedFreak03]

OK im back, still same speeds, but I was letting my stress test programs go, and the temp actually dropped to 45C about 5 minutes into the tests! And it stayed at 45C the rest of the time! Now at idle for about 2 minutes, its 34C. Anyway, I benchmarked again (im still at 240FSB, 3.12GHz), and im very pleased with the results. 9201 MIPS and 3879/6996 MFLOPS! Thats over 1000 MIPs more than when I was at 2.859GHz, and 600/900 MFLOPs more than before (its prolly cause of the higher memory frequency - that was back when I was at 3:2 and stuff). Im gonna go for 250FSB now, and if its stable, then im leaving it, and ill prolly get a new HSF later on (the stock is a little loud for my tastes).

-Josh

 

[MLJGTI]

More power More Power

 

[SpeedFreak03]

ok, I put the FSB to 250 (mem at 200) and it failed P95. Then I upped the voltage to 1.575 and it failed again, so then I did 1.875, and u guessed it, it failed. Reluctantly, I upped it to 1.6, and it still failed. So Im gonna put it back down to 245FSB and 1.575 and see what happens.

-Josh

 

[SpeedFreak03]

This is weird. I lowered the FSB by only 3MHz (247MHz now) and lowered the voltage to 1.575V, and it stable so far (20 minutes, but P95 failed less than 5 minutes each time before). Just for sh!ts and giggles im gonna up the FSB to 248 and 249 while keeping the voltage at 1.575 and see what happens. But I got 3.21GHz and 197MHz memory frequency, so im happy with this O/C, but im gonna try anyway. And then im gonna start lowering the voltage till it becomes unstable, then ill up it again (so i dont take too much life away from my cpu lol).

-Josh

 

[SpeedFreak03]

I played around more, and I finally found the "sweet spot". I am at 247FSB, 1.5875V, 3.21GHz! It is stable (been stress testing for like 1 and a half hours), and fast. It is 26-30C completely idle, 32-35 moderate load (IE6, Winamp) and 41-45C (the highest it has been at is 47C) full 100% load (with Prime95, Seti@home, SuperPi at 32M, 17 or bust, and Chessbrain all running at the same time, along with MBM5 to monitor temp). Here are my Sandra 2004 results:

10036 MIPs (Dhrystone)
3991/7123 MFLOPS (Whetstone)

I looked at the reference CPUs, and the fastest there is a P4 3.2C "2-SMT" (I think it means dual processors because the non-SMT P4 3.2C is much lower, but im not sure), and it gets 9858 MIPs and 4062/7139 MFLOPs, so its pretty much the same speed. Im gonna write down all my current settings and put it back to stock and take some benchies, so ill be back soon.

-Josh

 

[Duvie]

Remember what you are seeing are the infamous characteristitcs of asus mobos....Overvolting and sweet looking temps....

Many report when 1.525v is set in bios 1.57-1.58v is actual....I have seen from my tsting on several cpus now that once you hit 1.6v actual you really only go a few more fsb (2-3fsb) before you hit the no cross line of 1.65v actual...At 1.575v set bios you were likely running 1.62-1.63v actual and probably were hitting that wall....

The temps are sweet but asus since back early with the i845d chipset have reported friendly temps...On the othr hand I have an abit mobo that goes the other way....

I report on average an idle temp 0f 42-43c and loads 58c...Pretty much not going to stop swings like that no matter the case cooling as at the speeds some are hitting (I am at 3.5ghz) we are producing a lot of watts of heat and the best HSF o the market only dissipates .17c/watt so at 100watts in which I am likley producing at 3.5ghz it means the best I can do will still show a 17c swing from idle to load....Now my hsf probably is rated like .19-.20 with the fan I have so I am doing a little better then expected but that may be do to my case cooling which is keeping my case temps at 27c max full load....


If you had that same chip on this abit mobo you likely can add 10c to both your idle and load.....

Temperature is not going to kill this chip it would be the voltage that does a more lethal job.....

 

[SpeedFreak03]

Well to update, 247FSB was NOT stable, I finally got P95 to crash. I lowered it down to 245FSB, and I forget what I set the voltage to in the BIOS (maybe 1.5250) but CPU-Z reports it as 1.568 (and sometimes 1.552 - WTF?). I really noticed the overvolting when I was playing around with voltages. Like if I set it to 1.5750V in the BIOS, it would say 1.6V in CPU-Z, but if I set it anywhere from 1.5750V to 1.600V (only had 1.6 for like 5 min cause P95 crashed anyway), CPU-Z would report it as 1.668V! I knew this was way too much so I lowered it to the lowest available setting and its 1.568V (in CPU-Z) now. It has been running P95, ChessBrain, SETI@Home, 17 or Bust, and MBM5 all night and its still running well. As for temps, its at 47C, but I had a temp monitor in there (it died though somehow), and it was usually only 1-3C higher than MBMs temp, so its pretty accurate. I would say Im at 50C full load (never higher than 47C on MBM tho), and 26-32C under 10% load.

-Josh

BTW my case temps are 23-25 due (idle or full load) to my 2 huge 120mm fans (but they are still quiet)!