How far will my 800E go?

[paulcs]

I have a jumper for tweaking the I/O voltage on my i815EP board. Even thought I was a little tipsy, I actually had the presence of mind to check. Whether or not it works is another story.

One bad thing about the motherboard is it appears you *have* to get to get to 133 MHz for the 1/4 PCI divider to kick in. With the VIA Apollo Pro 133A, and even BX boards, you could run the FSB at 124 MHz and clock the PCI bus down to 31 MHz. I suspect Paul (Pace) might be facing the same thing with his Abit board, because it may be a limitation of the chipsets. It's the same thing with the AGP divider. The higher dividers seem to automatically kick in at 133 MHz, and there's no flexibility at lower clocks.

Paul
paulcs@flashcom.net

[This message has been edited by paulcs (edited 01 January 2001).]

[Bohrn]

I ran my 800 Cb0 stepping P3 at 112fsb and it worked fine except for some texture corruption in 3Dmark. Temps were in the low 40's and all else was well, but the G400 (AGP bus probs?) had a hissy fit. So 8x110 is the best for me I guess?

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AsusP3B-F,P3 880 Slot1, 256mgsPC133,G40032megSH, Diamond MX300,13.5gigs of HD's,52X CDrom,WinME, PD 5.41 w/ 6.10ICD,Altec Lansing ATP3Subwoofer,
Envision 17",Terrayon Cable modem w/D-Link nic,1 grey cat,1 black cat & 1 calico

[Manex]

Pace, congrats on the new hardware!!! I just got an SL4MA myself. I slapped an Alpha PAL6035 with Arctic Silver on it and immediately got to 960 with no effort at all, except tweaking the voltage to 1.85 volts. I wasn't satisfied with this, so I built an 80mm fan adapter for the Alpha, but still wasn't able to go any higher. I can provide plans for the adapter, if anyone is interested. I read Overclockers.com regularly, and it looks as if the mid-to-high 900s are the limit for air-cooling one of these babies.

I just ordered a Swiftech MC371 peltier unit that should be here next week, so I'll be able to report my results then. You can check out the MC371 here: http://www.swiftnets.com/MC371.htm
Swiftech makes the best quality heatsinks around IMHO, and I bet DuRaNgO will back me up on that.

Good luck with your new toys!

Cheers,

Eric

[This message has been edited by Manex (edited 01 January 2001).]

[yepitsme]

Here is something about overclocking,
check CPU-database.
http://www.overclockers.com/

P3 800@896 (slot1) + TitanMajesty2
AOpen ax6bc
G450 DDR32 @ 140.66/176MHz
192Mb PC-133
etc.



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clatto verata nectKRHMM...

[Pace]

(my replies are aimed at your individual comments - but please, anyone reply )

PaulCS: So then - is 1.75V the max for stock cooling?

Hard drive is IBM 75GXP. Though I've got a Maxtor 20GB which sometimes finds it's way into my machine.

And Happy New Year back

Pauly: It's a single 256/133 DIMM. And it's an SA6R - the KT7 was a last weeks 'thought' - but, I did read that it'll fit ok on my board - am I right?

Pauly/Jim: My choices of heatsinks are roughly as follows (taken from UK supplier OcUK):

<ul>[*]<a href="http://www.overclockers.co.uk/acatalog/Online_Catalogue_Alpha_CPU_Coolers_28.html">Alpha' s</a><ul>[*]PEP66U</li>[*]FC-PAL35U</li>[*]FC-PAL6035MUC</li>[/list]</li>[*]<a href="http://www.overclockers.co.uk/acatalog/Online_Catalogue_CPU_Coolers_2.html">GlobalWin's</a><ul>[*]FOP32-1</li>[*]FOP38</li>[*]CPM25603-32</li>[/list]</li>[*]<a href="http://www.overclockers.co.uk/acatalog/Online_Catalogue_Other_CPU_and_System_Coolers_18.h tml">Other's</a><ul>[*]Hedgehog 238M</li>[*]OcUK Super Hedgehog 238M</li>[/list]</li>[/list]

OcUK have also got Arctic Silver. Any other UK suppliers for OCing stuff?

I can choose between the dividers - the 3 options are as follows, with the 'normal' usage for them:
3:3:1 (100 FSB/RAM, 33 PCI)
4:3:1 (133FSB, 100RAM, 33PCI)
4:4:1 (133 FSB/RAM, 33 PCI)

Also, under Intel's specs for the SL4MA, they have this as a note: "Requires a motherboard with a split plane for the Vcc"

What does that mean?

And I can't actually remember seeing Spread Spec. Mod. - I'll change it if I see it (I presume it should be there).

Thanks once more,

Paul.

[paulcs]

I was just being prudent. Since this is not an exact science, I guess one gets away with what one gets away with.

1.74 volts was Intel's maximum recommended voltage for the PIII 933 and 1 GHz before they started sneaking up the voltage with the new steppings.

http://support.intel.com/support/pro...ii/voltreq.htm

I say, "better safe than sorry." The more you increase voltage, the hotter your CPU should get. I've seen the difference a good heatsink and fan with some silver based grease can do. As many of the people here know, I recently had a good heatsink cut my CPU temperature *in half.*

Just as an aside, I'm more skeptical about the cC0 stepping than most people. If the CPU requires more voltage to run at spec (1.70 vs. 1.65), why would it be more overclockable? I just seems to me like Intel's yields weren't as good as they expected, so they're upping the spec voltage so they could use the chips that weren't quite making the grade at 1.65 volts.

If what we've heard in this forum is true, Intel will be upping the voltages again on the cD0 stepping.

I'm just thinking out loud. I'm curious about what others think about this.

Paul
paulcs@flashcom.net

[This message has been edited by paulcs (edited 02 January 2001).]

[ALBPM]

The 256 MB Dimm will be fine. You may run into some problems if you ever try to go above 133 MHz FSB. The CAS to RAS may need to be set to 3 for that.

As far as the heat sink/fans go the Hedgehog, PEP66U and PAL35U are the best,in the order listed.

Paul

[paulcs]

Paul (ALBPM), do you think the Sunon fan is sufficient with the Hedgehog? I find Delta fans to be very loud. My office sounds like the runway at SFO.

Paul
paulcs@flashcom.net

[paulcs]

Oh man! I could kiss you (but I won't). I think Paul just "accidently" fixed a nagging problem I've been having with my newest system.

I was nosing around Inflow's site, looking at the Hedgehog, and I came across some interesting information about Delta fans and potential problems with plugging them directly into the motherboard.

Paul
paulcs@flashcom.net

[ALBPM]

Ok, the Y.S. TECH fan which is 27 CFM would be a better choice than the Sunon 23 CFM fan with any of the Alpha or Hedgehog heat sinks.

Ya, "NEVER" plug a 38 CFM Delta fan on a motherboard header. The Delta draws almost 4 Amps and will burn out the mobo headers. You need to use a 3 pin to 4 pin adapter with the Delta 38 CFM fan and connect it to a power supply 4 pin plug.

A Hedgehog with a 27 CFM Y.S. TECH fan will out perform a PAL35U and PEP66U with Delta 38 CFM fans. I also reccomend getting a copper shim for your P3 if you want to use the Hedgehog. It does not have the plastic feet that the Alpha heat sinks have to keep the heat sink level.

The Sunon 23 CFM fan is very quiet. It will outperform the PAL35U with a 27 CFM Y.S. TECH fan and perform as well as a PEP66U with the Y.S. TECH fan.

The Hedgehog needs at least a 27 CFM fan to really make it perform. It is not as efficiently designed as the Alpha heat sinks. The advantage the Hedgehog has is it's high thermal conductance(copper) and its mass(~470 gms)

Paul




[This message has been edited by ALBPM (edited 02 January 2001).]

[paulcs]

I am such an idiot. I should have figured this one out a week ago. I have an adapter too.

Excuse me. I have to go kick myself in the ass.

Paul
paulcs@flashcom.net

[This message has been edited by paulcs (edited 02 January 2001).]

[superfly]

I think that pretty much all of the latest steppings are using 1.70v regardless of actual cpu speeds.

My bros cpu is an 800 p3 and the stock voltage is 1.70v

In the cdo stepping the spec is being pushed to 1.75v and they're adding a metal cap(like the older celerons had),to increase surface contact between the cpu and heatsink.

My question is why do this now if the p3 is supposed to go for it's 0.13 micron die shrink very soon(tualatin core),which will probably allow the p3 to reach 1.3ghz or better.

I can understand the use of the new core(tualatin 0.13 micron)for use mostly in notebooks(for power and heat reasons),and will probably use them on low budget desktops later on.

Unless they still intend to release faster versions still based on the 0.18 micron core and needs those modifications in order to acheive it,after all intel won't convert all their fabs to 0.13 overnight.

Hummmmmmm.........

[paulcs]

I have a cB0 PIII 800, which runs at 1.65V.

Here's where it gets weird. I also have a cB0 PIII 933 (S-spec SL49J). My motherboard autodetects it at 1.65V and it says 1.65 on the box. However, on Intel's S-spec page, it claims the CPU should be running at 1.70V. Either that's a typo or they changed their minds.

http://support.intel.com/support/pro.../sspec/p3p.htm

On the voltage requirement page, they have the Slot 1 933 at 1.70 and the Flip Chip at 1.65.

Paul
paulcs@flashcom.net

[Brian R.]

My gaming computer has an 800E Slot 1 cB0(see signature below). Will run for a while at 124 MHz fsb (1.80 V) but eventually locks up. No voltage change or other heatsink (Used Alpha - no difference) had any effect on this behavior. As stated in sig, perfectly stable.

(Just bought a PIII 850E for another BE6 MB - hope it does as well)

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800e PIII @ 960 MHz (1.70 V) w/Tennmax P3 TF heatsink, ABIT BE6, (256 + 128 MB) Crucial PC133 + ASUS V7700 GTS DDR and Millenium G200 PCI, CL SB Live, 3COM 3C905C-TX NIC to ZyXEL Prestige 314 Router, IBM Deskstar 34GXP (13 GB, 7200 rpm ATA66 W2K) HD, Adaptec AHA2940 w/uw SCSI, IBM Ultrastar 9ZX 9.1GB 10K UW SCSI HD (WinME), WD Enterprise 4360 4.3GB 7.2k UW SCSI HD, Pioneer 303s SCSI DVD, Plexwriter 8/4/32A, Win2K all in a modified Supermicro SC750A case, also Sennheiser HD-600 headphones, Sennheiser DSP360 Dolby processor, and a Shure FP22 headphone amplifier.


[This message has been edited by Brian R. (edited 02 January 2001).]

[ALBPM]

Brian, try putting the Dimms in slots 1 and 3 if they aren't already.And then try swapping the position of the 256 and the 128MB DIMMs.
ABIT boards are sensitive when it comes to the placement of DIMM modules sometimes.

Also another factor is the extra electrical noise from having fans plugged into the mobo headers. I plug my fans on the power supply directly with 3 pin to 4 pin adaptors regardless of size.

Paul