Attention, PIV C1 users

[stroligo]

If you haven't been able to reach 3GHz so far with a C1, please indicate if you've done the following:

Run your memory settings conservatively (i.e., CAS 2.5 or 3) at a 1:1 ratio.

I suspect some of the problems may be getting caused by RAM not quite up to it.

If you haven't done this, try it, and report back on this thread to see if it helps or not.

Thanks!

[Silversinksam]

Bump to get Ed some answers.

[jdmcnudgent]

sorry, i dont have a c1 yet.:(

[method().man]

2.4 C1 Costa Rica Chip:

Will get into windows at 3006 mhz but will crash in 3DMark--even with 1:1 memory ratio and relaxed memory settings. Runs stable at 2950, 3:4 memory ratio with aggressive settings.

[method().man]

btw, are you also interested in cooling, voltage, etc.?

[gakkuken]

here is a first one for you to help me out with.

i got a 1.8a c1 (from dell 2300 series), and i can run the chip at 1.675v at 18x161 2.91ghz, but that's about it. i thought i just wasn't as lucky as some other people that are reporting 3ghz+ speed.

i tried the 1:1 ratio, but i can also run stable at 3:4 w/ 2-6-2-2 at 2.7v setting.

if u need any other info, let me know.
i got my 3dmark score below, not sure if this is a good score or not.

Update:
i use enermax 430w ps, and vantec aeroflow for cooling

[Buzzdog]

gakkuken, what week is your chip???

[gakkuken]

Originally posted by Buzzdog
gakkuken, what week is your chip???

sh*t... didn't write it down... is there a way i can check that info w/o taking the chip out?

[method().man]

Update:

Ok, I just changed power supplies (went from a 330 w to a 431 w; also, this power supply is much newer). Computer booted fine into windows @ 3028 mhz and I am stress testing with Prime as I type this.

1.58 v
28 c idle, 30 full load
Water cooled.

[anomaly]

My 2.4 C1 will go to 2790. Anything above 156 FSB and I can't restart from Windows or boot out of the bios. I can cold boot fine.

I have the Iwill P4HT, and tried two different PSUs: Enermax 431 watts, and Antec 400Watts.
All voltage rails are slightly above at load with the Enermax. The 12v on the Antec dropped to 11.63 periodically.

I tested with memory at 1:1 conservative timings using 256mb Twinmos PC3200 with Winbond BH-5 chips. One stick, two sticks, different slots.

I'd like to see an investigation of the 845PE chipsets power regulation. I've seen several Iwill P4HT users, a couple Epox 4PEA+ users, and an Albatron user who hit the wall at around 165FSB with various CPUs. I know Brett did an amazing test of the Iwill and Albatron, but something doesn't seem right. Or, we are all just coincidentally hitting the same max of our CPUs. All of us have warm boot problems, but can cold boot.

I know someone who volt modded his P4HT at 1.7v which allowed him to rise above 166fsb to 170+ FSB. He said from 166 fsb and up the voltage in the bios would reset to default from whatever he had it set to.

[method().man]

Originally posted by anomaly
My 2.4 C1 will go to 2790. Anything above 156 FSB and I can't restart from Windows or boot out of the bios. I can cold boot fine.

I have the Iwill P4HT, and tried two different PSUs: Enermax 431 watts, and Antec 400Watts.
All voltage rails are slightly above at load with the Enermax. The 12v on the Antec dropped to 11.63 periodically.

I tested with memory at 1:1 conservative timings using 256mb Twinmos PC3200 with Winbond BH-5 chips. One stick, two sticks, different slots.

I'd like to see an investigation of the 845PE chipsets power regulation. I've seen several Iwill P4HT users, a couple Epox 4PEA+ users, and an Albatron user who hit the wall at around 165FSB with various CPUs. I know Brett did an amazing test of the Iwill and Albatron, but something doesn't seem right. Or, we are all just coincidentally hitting the same max of our CPUs.

I know someone who volt modded his P4HT at 1.7v which allowed him to rise above 166fsb to 170+ FSB. He said from 166 fsb and up the voltage in the bios would reset to default from whatever he had it set to.

I have an ASUS P4PE and I agree with you here. When I try going north of 165, I start running into strange problems: sometimes I'll boot fine and can run Prime for over an hour, however, after a few restarts I get blue screens, random restarts, and an inability to boot out of BIOS. Going up to a 431 watt PSU (from a 330) helped a bit, but I still got strange behavior. The instability I've been getting is, shall I say, rather odd. I know how CPUs that have clocked too high act, this phenomena seems different to me somehow.

[stroligo]

Originally posted by anomaly


I'd like to see an investigation of the 845PE chipsets power regulation. I've seen several Iwill P4HT users, a couple Epox 4PEA+ users, and an Albatron user who hit the wall at around 165FSB with various CPUs. I know Brett did an amazing test of the Iwill and Albatron, but something doesn't seem right. Or, we are all just coincidentally hitting the same max of our CPUs. All of us have warm boot problems, but can cold boot.



I have also noticed that coincidence; that's why I put up this thread and wrote today's article. I listed a number of factors to see if they are or aren't causing these problems. If they're not, then we need to look into other things.

BTW, I just got a barebones Albatron 845PE. I went out looking today for a late week C1, but didn't find one, and probably won't try again until after the New Year (computer show).

I do have a 1.6A which at least used to be able to get a little over 166MHz on an 845E board, so I should be able to experiment a bit with that.

[stroligo]

Originally posted by method().man
btw, are you also interested in cooling, voltage, etc.?

I'm a bit more interested to see if these changes would in and of itself improve whatever setup people had, but knowing this wouldn't hurt. Thanks!

[Buzzdog]

I have a 2.4 c1. Info is as follows.

fpo/batch 3236a104 pack date 10/10.

I can run prime stable at 160fsb. I can boot into windows at 167fsb but not stable. Can run 3dmark2001se, but not prime. Also games will crash at 167fsb. I am currently using an Antec True Power 430 watt PSU. Temps are not an issue. I am using an Abit IT7-Max (original) with the 845e chipset. This would seem to rule out the pe chipset being the stumbling block. I can try it with an Antec True Power 550 PSU that I have for a new system that I am in the process of building but I am skeptical if that will help. It is my theory that the week seems to be meaningful here. I have seen several week 36 chips that have not performed as well as hoped for, meaning 3+Ghz. What does seem to be the case, you either have a gem or not. The c1's do seem to handle temperature better then the b0's.

I have tested my system using 1:1 and loose timings. This has had no effect on the overclocking potential. I have seem to have hit the limit for my particular chip. I will have a 1.8 c1 hopefully after the new year from a Dell system. This will more then likely be a mid to late week 40 chip. I will copy the fpo/batch info down when I do the transplant. I have already found a tentative buyer for my 2.4. I will have to take a hit on what I payed for it but it will go towards a GB board. Also, I am not buying a Dell just to get a 1.8 c1. I lucked out and found someone that was in need of a new machine. I suggested a Dell, and asked if I could swap out the CPU's.

stroligo,

You may want to add to the criteria and ask for the fpo/batch info. I think this might shed some light as well.

[anomaly]

Originally posted by stroligo


I have also noticed that coincidence; that's why I put up this thread and wrote today's article. I listed a number of factors to see if they are or aren't causing these problems. If they're not, then we need to look into other things.

BTW, I just got a barebones Albatron 845PE. I went out looking today for a late week C1, but didn't find one, and probably won't try again until after the New Year (computer show).

I do have a 1.6A which at least used to be able to get a little over 166MHz on an 845E board, so I should be able to experiment a bit with that.

I'm glad to see you, with the reach of your site, looking into this. Thank you.

I was thinking of trying the Albatron board as well, just for testing my cpu. But maybe I should try something entirely different from the latest intel chipsets. This is my first Intel rig, so I'm not up to date on what else will allow high FSB's while keeping pci and agp in spec. Maybe the SIS648 or 645DX. I'll look into it, because I definitely want to find out if it's my chip or board.

I bought my C1 at a computer show here in L.A. about 5 weeks ago. 2 of the first 10 vendors had 2.4's. I stopped at that point and bought one. 2 weeks ago I went back looking for another, but didn't find one. I went through about 30 vendors and found nothing.

My chips codes:
2.40ghz/512/533/1.525v
SL6EF PHILIPPINES
7236A353-1708

Packdate is 10/7/02

[tuzzi]

Have a C-1 2.53. Here is the spec:
http://processorfinder.intel.com/scripts/details.asp?sSpec=SL6DW&ProcFam=483&PkgType=ALL&SysBusSpd=ALL&CorSpd=ALL

Am able to run 160fsb on my Asus P4PE for 3.04 with ease. Runs at stock voltage 1.525 (Shows as 1.616 in Asus Probe) Heres my set-up:

Asus P4PE
Corsair XMS3200 Cas2 ( Set to speed in bios)
Alpha 8942 with Panaflo H1 fan
P4 2.53@3.04

[Mike360000]

Originally posted by tuzzi
Have a C-1 2.53. Here is the spec:
http://processorfinder.intel.com/scripts/details.asp?sSpec=SL6DW&ProcFam=483&PkgType=ALL&SysBusSpd=ALL&CorSpd=ALL

Am able to run 160fsb on my Asus P4PE for 3.04 with ease. Runs at stock voltage 1.525 (Shows as 1.616 in Asus Probe) Heres my set-up:

Asus P4PE
Corsair XMS3200 Cas2 ( Set to speed in bios)
Alpha 8942 with Panaflo H1 fan
P4 2.53@3.04

About the same here. P4 2.53 C1, on a Asus P4PE.
Right now running at 3.04, 160 fsb.
But my voltage had to be set higher. Running vcore at 1.625 in BIOS.

I can go to 163 fsb but will eventually crash in WinXP.

I also tried this same cpu in a Abit BE7 mobo. I could NOT oc past 159 with it, regardless what I done!

Using Alpha 8942 heatsink with the variable YS Tech fan.
Temps cpu idle 31c load max 42c
system idle 26c load max 36c
But I am also using filtered forced air cooling, by blower.(Not AC'ed and no case fans.)

Cheers,
Mike

[tuzzi]

Good stuff Mike360000, forgot to mention my temps. They are:

CPU temp 34c idle 41-43 full load
MB temp 26c idle to 32c load

This is a good chip. I could go higher but I like the voltage. Gonna tighten up my memory timmings 2, 2, 2, 2, 6.
:D

[jdmcnudgent]

bignuttz has a b0 2.4b chip (pre-shrink) that does between 167 and 170fsb easily on a asus p4pe mobo.

[SBeaver]

My 2.4B C1 gets into windows at close to 3Gig but it is only prime stable at 2736MHz
Running 1:1 wont make it any better.
I have tried up to 1.725v on it and it is still the same, wont go higher on the voltage since I really can't afford another burnt chip the last one was not very nice.

[laja]

I have an RDRAM system that ran at 150 Mhz FSB for months (and some VERY hot months). Now, with my C1 2 Ghz, I just can't go above 141 Mhz FSB (2810 Mhz) stable. Every other system component worked flawlessly at the same settings at 150 Mhz FSB, so the CPU is definitely the weak point.

[anomaly]

Originally posted by SBeaver
My 2.4B C1 gets into windows at close to 3Gig but it is only prime stable at 2736MHz
Running 1:1 wont make it any better.
I have tried up to 1.725v on it and it is still the same, wont go higher on the voltage since I really can't afford another burnt chip the last one was not very nice.

That's just about exactly my situation. Everything else is stable almost to 2.9: games, 3DMark, but not prime.

I just ordered the Albatron 845PEV-Pro, with the hopes it will do better. But I see that is what you are using. Is yours the PEV or the PEV-Pro? There are 4 different versions. The PEV does not come with Lan, the PEV-Pro does.

[SBeaver]

Originally posted by anomaly


That's just about exactly my situation. Everything else is stable almost to 2.9: games, 3DMark, but not prime.

I just ordered the Albatron 845PEV-Pro, with the hopes it will do better. But I see that is what you are using. Is yours the PEV or the PEV-Pro? There are 4 different versions. The PEV does not come with Lan, the PEV-Pro does.

It's the cheap PEV I got, it does what I need and I allready have a lot of NICs.
A vdimm voltage mod for it would be nice though, I can't get my mem up ti the speeds I had on my XP333