Some results with P4C800-D and P4 3.0c

[Major]

I've had it up and going for a couple of days now so I thought I'd give a little run down or results.

First If I had known anything about Intel P4's I would have saved some money and gone with the 2.4 or 2.6 instead of the 3.0 ! hehe

Second until I find a Vdimm mod for the P4C800 I cant run 1:1 at any real OC, the highest I could obtain with 2.85v was 232 fsb/mem @ 3480. I'm hopeing that with 3v or more on Vdimm I can get to 240mhz fsb/mem which should rock !

So far I can do 248mhz stable with the 5:4 divider for a 3720 OC, this is with my WC. I've run into a wall beyond that regardless of Vcore. I think that my TruePower 550w is at a breaking point as my 12v rail and Vcore are all over the place. Very unstable readings if you can beleive them. :( My PC P&C should be back from RMA next week and maybe that will improve the situation some.

P4's are alot more Vcore sensitive than AMD from what I've seen so it was alittle slow going for me at first.

[Major]

I think if I can't find a Vdimm mod in the next week or so I'm either going to pick up a 2.4c so I can run at higher fsb or a MSI 875P Neo so I can run 1:1 with this 3.0c.

and some more pics:

[Amoeba Assassin]

are using a pelt cooling system?

[Vatt]

Hi Major :D

Your CPU-Z screenshot says your vcore is 1.728
Your sig says 1.68

What is the real vcore? Both in BIOS and what MBM says?

Could you look at your box and tell me the FPO/BATCH code please?

If have a P4 3.0(800) also and my code is: L310A586

This one needs over 1.725 for 3.9 Ghz . That is in a Prometeia by the way. I think people need to be very lucky to get to the 4.0 Ghz without too much voltage.

[aLpHaEv7]

the P4C800 overvolts by quite a bit.

my P4C800, with 1.6vcore set in bios, displays 1.6448 real.

[shogan191]

Thanks for the update. I take it you are still glad you went with the P4C 875 instead of the P4P 865.
I'm still holding to get some kind of read on which to go with.
I am only going to be on air so would I be better off with the 2.8 or the 3.0. Thanks.

[Major]

Hey Vatt thanks for pointing that out to me about the vcore, mbm shows 1.68-1.7v don't know why cpu-Z was reading high ? I have it set to 1.7 in bios

Batch # for my processor is L311A762

[Major]

Originally posted by Amoeba Assassin
are using a pelt cooling system?

No I'm water cooled with MCW5000, MCW50-T, Eheim 1260, 2x Dtek hc and a bunch of 165cfm 120mm fans. I have the nb on a seperate loop with Eheim 1250, Swifitech MCW50, Swiftech 676 radiator.

I'm putting a pelt on the cpu in a week or so.

I really really really need a Vmod for dimm, if you guys come across one please let me know !

[charlie]

Major,
Let me tell you a bit about using the cpu pelt...
I've got the MCW5000PT and hit 193fsb.
When I was aircooled BUT running VERY cold air I hit 183fsb.
I mean like 1C air! My idle temps were like 5c-7c.
So, the extra 10 or so degrees that I gained with the pelt, (ice chilled water too) was worth 10mhz fsb or in my case 200mHz!!
So I will BET you that with sub-zero cooling (chilled water) you will do 250-260fsb screenshots and run 3dmk all day long at 250mhz (wel maybe not ALL day long ;))
Don't be depressed with your 3.0C...remember the 2.4 is near useless, as even 300mHz fsb is only 3600mHz, and OC'ing the 2.6 and 2.8 requires the 3:2 divider on the top end. Keep on top of your 3.0C and see what it'll do!
C

[Major]

yea charlie this P4 stuff is all new to me, If I had thought it through I think I would have got a board with higher Vdimm so I could run 1:1 like I hoped too, or a 2.4 or 2.6 so I could run the fsb up.

I've got a meanwell psu and MCW5000-PT ordered and should have it here late next week so I hope that your right. I'm not expecting 4gig but say 3.8 or so 24/7 would be great.

[charlie]

Here's my take on the MCW5000PT. If your looking for superlow temps I don't think they're that great. Like when I run a 2C reservoir with 5 gallons of iced water, I idle at like -1 to maybe
-3C. But under a load the temps JUMP up. OTOH, when my water in the res' get's warm...I mean real warm like bath water...my idle and light desktop temps are 6-9C. Soooo...I think in a closed case like yours with a big rad, you'll be suprised how good the temps are...I guess my problem was thinking that a pelt could hold or attain -10C or -20C. I'm about to bust out the VISA card in July for a Mach II.
C

[Creative]

Very nice overclocks Major :)

Im glad that your change to Intel has been that of a successfull one. :toast:

I myself have just made the hourney back after using AMD for a few months...and Im LOVING it!!!! :banana:

[Major]

Everytime I think I'm ready to get a promie something comes up and it doesn't happen. :(

[Creative]

It must be a sign ;)

Hang in there, just keep putting some dosh away every week that will be dedicated to that prommy and then before you know it......she will be yours :banana:

[CodeRed]

Originally posted by Major Slaughter
Everytime I think I'm ready to get a promie something comes up and it doesn't happen. :(

Dont worry buddy it'll happen eventually.

You could always sell a kidney :cool:

[Major]

Can't sell a Kidney ! they are the only organs that I have left that still work !!!

[aLpHaEv7]

major: now that you've found the vdimm mod, do it and let me know the results ;)

wat bios are you using btw?

[BrainStorm]

So Major, where are your results now that you have the vDIMM mod? We wanna see you kicking some butt and taking names! ;)


EDIT: beat to the punch by a split second! :D

[aLpHaEv7]

Originally posted by BrainStorm
So Major, where are your results now that you have the vDIMM mod? We wanna see you kicking some butt and taking names! ;)


EDIT: beat to the punch by a split second! :D

we are all eager to know, arent we BrainStorm? ;)

[BrainStorm]

Originally posted by aLpHaEv7
we are all eager to know, arent we BrainStorm? ;)

I hope nothing's gone wrong as I would have expected to see a post from Major by now.

[Blue078]

Yea Major you got me scared to try it now:)
This is a long copula hours.

[Major]

Sorry !!! I had to do the Memorial day thing with my family.

Well to make a long story short. I'm back at 5:4 for now.

I was able to get a 238mhz fsb at 1:1 with my ram at 2-7-3-3, but beyond that Prime would not run past the first torture test.

I think I'm at the limit of the NB now !:(

macci do you know the Vdd mod for the NB ??????? please !

Anyway I'm still playing with it, but I think its the nb.

[Major]

I wanted to get back to 248 mhz 1:1 on the cpu fsb if possible, Its not my memory, my memory will pass memtest up to about 244 mhz b4 I get errors, and everything seems to be running fine up to 240, it just wont pass prime95 torture test so something else is up. I've tried dissabling PAT and HT but no change.

I really think its the nb needing a little more juice. Opp said that his P4P800 topped out at 238 1:1 too I think.

[Blue078]

238mhz for 2 512mb sticks is still not shabby at all.

2X256mb sticks might get you to were you wont to go.

[Blue078]

Humm?? with out the vdimm mod the best my Twinmos has done so far is 224mhz

Thats 280fsb 5:4 but after an hour or so of gaming I'll get a crash.

[Major]

I just check the thread Opp said his MSI toped out at 235 fsb 1:1, I'm sure that its the nb, he has had his HyperX up to over 250mhz.

[Blue078]

So I guess next up is a vdd mod:)

Well I'm off to do the vdim mod, Thanks Major, and Macci

[Major]

hehe ! yep

[aLpHaEv7]

chainbolt on OCAU got his 8KNXP to 246FSB 1:1 with his Twinmos. I don't think the NB is crapping out as yet. Try lower timings? This was done on 2.5-4-4-8.



http://www2.gol.com/users/postbox//PC3700/PC3700-6.jpg

http://www2.gol.com/users/postbox//PC3700/PC3700-2.jpg

[Major]

Yea I tried all the different timings, memory is fine, something else is going on.

[Major]

Here is the best I could squeeze out stable after doing Vdimm mod, this is 1:1 @ 240mhz 2.5-8-4-4

[Major]

and sandra cpu, down 120 points from 248 5:4 @3720 so I think I like it at 1:1 so far.

[aLpHaEv7]

Tried the new beta 1007.006 bios yet major? it's sweeet :toast:

http://www.netspace.net.au/~alphaev7/ocau/277-1007.JPG :banana:

[Major]

Yep, they have it tuned up pretty nice !

[Blue078]

I'm haveing a problem with my ram and the 5:4 ratio.

At 270fsb 5:4 I can compleat 3D Mark 03, but not at 275fsb 5:4 {224mhz mem} not even with 3.2vdimm.

But the memory will compleat 3DM03 at 240mhz 1:1 ??

I've ran prime95 for 26hrs at 285fsb 3:2

Any one else experence this????
Thanks

[Major]

The only thing that I've noticed Blue078 is that my chip requries more voltage at 5:4 divider than at the 1:1. I know this sounds backwards but its whats happening

If I set the fsb to 240 and try at both 1:1 and 5:4 for the same OC, I can run prime stable at 1.6v with the 1:1 but it takes 1.675 at 5:4. ??? maybe its a Vcore issue with your results too ?

[Creative]

Originally posted by Major Slaughter
The only thing that I've noticed Blue078 is that my chip requries more voltage at 5:4 divider than at the 1:1. I know this sounds backwards but its whats happening

maybe not as backwards as you think ;)

With my old 533fsb chips, I used to have to run more volts to the cpu to get it stable at the *same* cpu mhz, but different ram ratio.....eg it needed more for 3:4 ratio than it did for 4:5 or 1:1 :confused:

So your not alone Major :D
heheheh
ps
havnt tried with 800fsb chip. Only testing I did with 1:1 was up to 228 stable and then proceeded to test 5:4 cos it would get more cpu mhz :p

[Major]

Thats reasureing Creative, I know with the NF2 I had a simular issue with fsb and the cpu needing more Vcore even for the same OC with lower multi. So I guess its pretty much the same thing with the P4.

[BrainStorm]

Originally posted by Blue078
I'm haveing a problem with my ram and the 5:4 ratio.

At 270fsb 5:4 I can compleat 3D Mark 03, but not at 275fsb 5:4 {224mhz mem} not even with 3.2vdimm.

But the memory will compleat 3DM03 at 240mhz 1:1 ??

I've ran prime95 for 26hrs at 285fsb 3:2

Any one else experence this????
Thanks

I think 3dMark is just more stressful on the NB/Memory than Prime in some respects. I have a very similar experience with my Epox 8RDA with the NF2 chipset. I've always been able to run the FSB higher prime stable than 3dMark stable. By several mhz - though not a difference as high as 15. However, I was also not running my FSB at 270-285 :D

[Ewok]

also remember when testing with prime you have to go all the way down to the 160k test before you know its stable as sometimes only a specific test will cause it to fail.

ive had failures on 160k, 512k, 768k during testing different fsb's but all of them could run the earlier tests over and over without failing.

[Major]

I agree BrainStorm, I think 3Dmark stresses just about the entire cpu/mem/agp/nb loop, where prime is more cpu intensive.

[Blue078]

OK thanks that gives me something to think about. Because it's all ways 3D MArk 03's CPU test where it fails at??

It's puzzled me why staying at the same CPU Mhz, but lowering the mem ratio let it pass a CPU test. :)

I will apply more vcore and see what gives

[BrainStorm]

Major, I've been reading up some here on the dark side and I'm wondering why don't you sell the 3.0 and buy a 2.8 (or maybe even a 2.6) instead? Or have you thought about pelting the 3.0? Just curious.

[Major]

I've got a MCW5000-PT on the way with a meanwell psu for the pelt. next week or so, that was my initial plan. I'm gonna miss out on all of this high fsb stuff though. but maybe 4 gig is in reach ? who knows !

If I were going to stay with water, I think the 2.6 would be they way to go for best overal performance with fsb/oc

[BrainStorm]

Yeah, I'm thinking the 2.8 with a pelt might get you where you want to go better than the 3.0.

[Major]

yea, I had already ordered the 3.0c from a local vender (they advertise with me) so I stuck with the decsion. I made it prematurely before I saw what the results where from everybodys OC's, If I had to do it over I would have saved the $150 and got the 2.8 instead. Live and learn ! hehe

Now if I had a r404 promie !

[BrainStorm]

Yeah, so when are you gonna get that promie? ;)

[Major]

hehe, I'm going to be broke for atleast another 4 weeks until I get my next comission check afer buying the P4C and 3.0c + MCW5000pt and meanwell psu. :( more than I planned on spending really.

I had my last commision ck earmarked for a prommie with my NF7-S and 2700+, but I decided to go this route.

[Blue078]

No luck with this 2.4C chip, 270 5:4 is stable, 272 is not. I gave it as much as 1.75vcore.

287 3:2 is stable at 1.585vcore, 290 is not, even with 1.7vcore.

Still baffels me that the memory will run 240mhz no prob 1:1, and the cpu will do 287 3:2

At any rate this chip is going back, 287fsb for 3444mhz is still a down grade for me from my 2.53 that is happy at 3.6Ghz on 1.62vcore.

I'm starting to think like BrainStorm that the 2.8 might be the best bet:)

[Creative]

Major, I rekon you would love a 2.8C......put mine in the vapo about 20 mins ago and it has been priming at 3600MHz, default volts for the past 8 mins so far, up to Test 27 of the 1024K tests.....Im stoked!!!! :banana:


Ewok, how far into prime are the 160k, 512k, 768k tests? Im about to go to subway and leave her priming. I should be about 30 mins, hopefully it might be up to those tests by then :):)