Need Help OCing P4P800 Deluxe 2.8C

[elmer2000]

Hi, guys

Any tips to boosting my OCing? I have a P4P800 Deluxe, Pentium4 2.8C with Geil PC4200 DDR (2X256), Stock Heatsink and Fan. Have Bios Updated to 1014..... Using Aspire 500W PSU

Setups are:
FSB = 252
Ratio = 1:1

Vcore = 1.6 (PC Probe reads 1.7 at idle sometimes)
VDimm = 2.85
Memory Times = 2.5, 4, 4, 8
MAM = Enabled
Performance = Standard
DRAM Idle Timer = Auto
DRAM Refresh Rate = Auto

Spread Spectrum = Disable (seems slow when running programs disabled... and Prime95 wont pass without error or gets lockups if enabled??)
USB Legacy Support = Disable
AGP/PCI = 66/33
AGP = 1.5

CPU Temp idle = Around 30ishC
CPU Temp Load = 48-52C
+12V rail = 12ish-11.855 (once in a while 11.75???)
+5V rail = 5ish (never drops below 5)

Prime95 and MemTest passed for 6 hours on this setting. I cant seem to get any more out of my computer no matter what I do. What do you guys think? Any suggestions? I have notice that when I set my Vcore to 1.62-1.65 it will not boot windows for some reason on 252fsb. Funny thing is I can set 260fsb to Vcore 1.6 and it boots windows but will lock at Prime95 torture test. Same goes for the Vcore on that setting as well. Weird thing is setting it at 1.7 I can boot windows......Looks like 1.62-1.65 Vcore is broke?

[batboy]

That's a great O/C. You are about maxed out, probably. Maybe try tweaking your RAM timings for a little more performance.

[caboob]

Good OC. That's probably as get as it gets short of going to phase-change cooling.What's the stepping code of the chip?

[elmer2000]

SL6Z5...... M0...... was hoping for more out of this chip.....

[texasfit]

That's a nice oc and is most likely pretty close to max. There could be a few more Mhz in it if you went with extreame cooling instead of stock.

[Grandpa Dan]

Check the cpu database...thats right it the heart of the pack. m0 or not thats a nice oc. Be thankful.

[texasfit]

Originally posted by Grandpa Dan
Check the cpu database...thats right it the heart of the pack. m0 or not thats a nice oc. Be thankful.
Only problem with the CPU Database is that there are only a couple of the MO stepping cpu's listed and they are both over 3.6Ghz. ;)

I just picked up a SL6Z5 myself and will be putting it in my sig rig this evening. Wish me luck. It's a 3346. If I can get it to run 262 like my 2.6C, I would just :drool: with pleasure.

[Grandpa Dan]

Contrary to popular belief all the m0's are not "wonder chips". Some do seem to be quite a bit better, but I know several people who have under achievers. M0 or not a 3.7 chip is still the exception not the rule. Perhaps the people w/ m0's that only do 3.3ghz haven't yet put their #'s in the database because they're still hoping for more. Expectations should always remain realistic when ocing, it's one thing to hope and another to expect.



I do wish you luck.
GD

[batboy]

I'm guilty about only putting my best overclockers in the CPU database. I think lots of people do that.

[texasfit]

Originally posted by Grandpa Dan
Contrary to popular belief all the m0's are not "wonder chips". Some do seem to be quite a bit better, but I know several people who have under achievers. M0 or not a 3.7 chip is still the exception not the rule. Perhaps the people w/ m0's that only do 3.3ghz haven't yet put their #'s in the database because they're still hoping for more. Expectations should always remain realistic when ocing, it's one thing to hope and another to expect.
I do wish you luck.
GD
Thanks for the wishes. :)

I would disagree partially with you on the MO stepping vs the D1 stepping chips, however. True that no chip is a "wonder chip" and any stepping could be good or bad ( luck of the draw, as they say). The MO stepping IMHO would have a higher probability of reaching the best Ghz speed vs the D1 due to the fact that it is a multi-vid that is designed to run at it's rated speed using only 1.425v instead of the 1.525v of the D1. This was proven back when the multi-vid chips such as the 2.53Ghz 533fsb were such good overclockers at what was presumed to be default vcore but in reality were overvolted from the start.

Just my 2 cents. I will report back on my particular chip later this evening, since I am shutting down now to find if this is a golden child. Going to be using air, so I am not expecting above 3.6Ghz but I am hoping for it. Using a Tt SP-94 with Panflo 57.6cfm and AS5 which is about as good as it gets with air cooling. :beer:

[Grandpa Dan]

I wasn't trying to compare the d1 or any other really. It would seem that the m0's do have more potential than past cpu's.

It seems lately that alot of people are getting m0's and "expecting" 3.6 minimum from a 2.4. My point is more that along with the good comes the average and the poor. While overall more 2.4 m0's may hit 3.5 or above there will be a good number that have trouble hitting a 250 fsb.

[texasfit]

Originally posted by Grandpa Dan
I wasn't trying to compare the d1 or any other really. It would seem that the m0's do have more potential than past cpu's.

It seems lately that alot of people are getting m0's and "expecting" 3.6 minimum from a 2.4. My point is more that along with the good comes the average and the poor. While overall more 2.4 m0's may hit 3.5 or above there will be a good number that have trouble hitting a 250 fsb.
I agree with you completely on that. I am going to start a new thread on my chip. I feel that I have got this away from elmer2000's topic. I will say that I just booted my SL6Z5 @ stock and was taken back by the fact that when BIOS vcore is set to auto it reads 1.440-1.456v with an occasional 1.472v and that is verified to be correct by CPU_Z and Asus Probe.

[Propilot]

My 2.8c D1 chip does the same thing on Vcore.
It runs flawlessly on 1.6v, but will not boot on 1.625 or 1.65 and locks up on 1.7.
Is it the P4P800 or the 2.8c.
I have heard of others with this same issue.

[elmer2000]

I think it's the P4P800 Deluxe.....I have motherboard REV. 2.00 :confused:

[Propilot]

Mine is rev. 1.xx
So apparently doesn't matter.

[elmer2000]

Do you know if other motherboard do the same?

[batboy]

It's not the motherboard, it's the newer CPUs that just plain don't like to be overvolted. I have two Abit IC7 mobos and the CPUs start crapping out at 1.65v to 1.7v.

[texasfit]

Originally posted by batboy
It's not the motherboard, it's the newer CPUs that just plain don't like to be overvolted. I have two Abit IC7 mobos and the CPUs start crapping out at 1.65v to 1.7v.
My P4C800-Dlx is also the same way with the MO stepping chip.
It actually gets unstable using higher vcore above 1.60v on mine.
I have mine set to 1.5625v in the BIOS which reads as shown in the link for MBM, Asus Probe and CPU_Z.

Highest stable on air is 3673Mhz 262fsb (1.488v load) (1.536v Idle) (http://home.earthlink.net/~jthites/images/262fsb_3673Mhz.jpg)

You might also want to try these settings in you BIOS:
DRAM Idle Timer = Infinite (instead of Auto)
DRAM Refresh Rate = 64uSec (instead of Auto)
and increase you vagp to 1.7v

[elmer2000]

-Texasfit-
Isnt Vagp 1.7 a little high?

[texasfit]

Originally posted by elmer2000
-Texasfit-
Isnt Vagp 1.7 a little high?
I found that on my board as many others have found that the overall stability of the system is better using 1.7v on the agp. I have not had any problems with heat on my AIW 9700 Pro with that voltage and it has been running there since April 03.

[Grandpa Dan]

My agp is at 1.7v. also. It's an increase to the northbridge.