View Full Version : OC P-3 700MHz
700 to 903MHz - 1.65v Run real nice :)
933MHz - 1.65v to 1.95v not stable in game :(
What is going on? Just only 33MHz increasing.
I tried different memory , graphic card, HDs, and bios setting.
Abit BX6r2
MSI 6905 v2.3
CoolerMaster 6H51
Micron 256MB SDRAM
Geforce2 Ultra
Sound Blaster Live MP3+
Creative 5x DVD drive
Plexter 16x10x40x
Matrox HD 7200rpm
case power 250w
EtherFast 10/100 LAN Card
Can you run prime95 or seti for 3/4 of an hour at 933?
What temp is your cpu running at 933?
Pci bus at 1/4?
Placid (May 29, 2001 12:22 a.m.):
Can you run prime95 or seti for 3/4 of an hour at 933?
What temp is your cpu running at 933?
Pci bus at 1/4?
No I can't.
The temp is 37c
Pci at 1/4
Sounds like your cpu isnt a good overclocker.
37c is pretty warm for that cpu thou, maybe try to get it cooler.
Is that 39c under load or just idle?
If its idle then its really warm for that cpu.
37c when i use 3Dmark2001.
Look like no go for 933MHz
thanks
Yes when a cpu wont go any higher thats it.
If the cpu is newer maybe try again in a month or so.
Robert, if you can run 900 @ 1.65 volts then it's probably not the CPU holding you back. I'd be suspicious of that Ethernet card, they don't always like to be overclocked too far out of spec. Another thing to think about is what speed RAM are you using? PC-100 memory might not cut it. Maybe try more case cooling and northbridge chip cooling.
batboy,
The bx6 R2 has 133 fsb with a 1/4 divider, so I believe he would have the PCI right on spec at 133 fsb, so that should cause no problems for anything but the memory and the agp.
Perhaps Robert should try setting the latency to 3, 3, 3 and see if that helps the 133 fsb stability. If so, look for some good pc133 Cas2 memory.
If not, it might be extra cooling or live with it. I would bet that if he lowered that load temp to under 30, it would stabilize, but you can't get under ambient temperature with fans or water alone.
I don't know that it is significant, Robert, what is your RT1 (system) temp?
anvil
Hi
I'm sorry. I have Micron PC-133 256MB SDRAM CL2 now. I tried the latency to 3, 3, 3 already.
my system run at 39c when i use 903MHz. If I go for 933MHz the temp will stay at 41-43c. Is that a problem? How to cool it down?
I used to run c566@850MHz the temp on RT1 is about 42-43c too.
thanks
Allan Nielsen
05-29-01, 12:35 PM
Robert (May 29, 2001 12:07 p.m.):
How to cool it down?
Start by trying to remove the sides on the case, and see if that helps. What cooling do you have on the cpu? You will need better cooling than the stock intel hsf combo supplied with the cpu. Look into Alphas or Global Win - do yourself a favor, and stay away from the golden orb. You ARE using thermal grease, right? (Only a paper-thin layer)
Allan Nielsen
05-29-01, 12:42 PM
Oh yeah, I almost forgot, what stepping is your CPU?
(Stepping = version. There is a number (S-spec) directly on the CPU. Mine says 'SL45Y', and I go to this table http://support.intel.com/support/processors/sspec/p3p.htm to see that mine is cB0. What is your called? cC0 is best, cB0 is ok, and cA2 sucks)
I have my 'cB0' P3-700 doing 1050MHz this instant, instead of the 966 I've been on for a while. Shows how great the Alpha PEP66 performs, imho.
[OC]_SR20DE
05-29-01, 12:58 PM
If the Robert's CPU default voltage is 1.65Vcore, then his might be cB0.. but yah.. like what Allan Nielson said, find out what stepping.. :)
sifu quoc
05-29-01, 01:11 PM
if you have more than 1 stick of ram in there... try just 1... this helped my oc my p3 700 from 910 to currently 945...
i took out 1 stick of 128 mushkin rev 2.... at close to default voltage
I have one of these running fine on a friend's PC with an intel stock HSF 1.90v at 933mhz.
I never bothered with the stepping because it overclocked so well. I burned this in for 16 hours and would not run stable below 1.90v without the burn-in.
These processors are real picky, I think you have reached your max without additional cooling being taken into consideration... the above was probably a cC0 step, only one of these chips could do so well with no additional cooling.
My CPU s-code: SL3XX cB0
Version: A44328-001 Date: 01/11/2001
CoolerMaster 6H51 (a heatsink w/ fan)
Robert (May 29, 2001 02:01 p.m.):
My CPU s-code: SL3XX cB0
Version: A44328-001 Date: 01/11/2001
CoolerMaster 6H51 (a heatsink w/ fan)
Oops! Coolermaster is subpar at best for serious cooling, and the cB0 is going to hold you back (unsure of the SL3XX meaning), but your stepping is very tough to OC. Not impossible, but requires an extra investment in cooling aparatus that will almost offset the cost of buying a 933 P3.
Robert,
Try the case side removal and just set up a common house fan blowing on the cpu. If it brings the temp down a few degrees and you still aren't getting there with stability, then you might start thinking about an expensive low temp solution or new chip.
anvil
I still think Robert has a good CPU if he can run 900 at 1.65v, that's pretty good. Also, there is nothing wrong with the P-III 700 cB0 stepping. True, the cC0 stepping (on the average) will overclock a little better. BUT, after he posted temps and type of CPU cooler, I am now convinced it's a heat related problem. Did you use a good quality thermal paste when installing the heatsink?
No, I don't have thermal paste. i use just the heatsink compounds
What is System Temp RT1 means?
It means CPU temp or Motherboard temp
Robert,
On the Abit bx6 R2 there are two temperatures reported in the bios (and in the "Hardware Doctor" monitor program that I believe was supplied on the utilities disk with the motherboard and runs on your desktop).
The RT1 temp gives the temperature of the motherboard itself and is part of the motherboard circuitry. It is NOT the cpu temperature.
The RT2 temp gives the temperature of the cpu specifically. It is NOT a part of the circuitry directly, but given by a sensor cable that must be connected to a terminal on your motherboard. The sensor cable must then be attached to the under side of your heat sink near the processor. Look for a loose cable near the ISA slots if you haven't attached it.
If you have not attached the sensor to the heat sink, then you do not know your cpu temperature.
anvil
Mr. Potatoehead
05-30-01, 02:35 PM
If you only have 1 stick of memory, try moving it to another bank.
zPacKRat
05-30-01, 02:56 PM
try setting your inline queue depth to 1 from 8, and you may see an improvement in stablility, but your memory perf will go down. I have a be6 II v2 and it won't run my 700 at 933 with the inline queue depth set to 8 stable at all.
However my bh6 will run the chip all day long at 933 and it's memory setting is 8 and cannot be changed.
Go Figure.
OK, This week I will get OCZ Gladiator w/ 38cfm fan + OCZ thermal silver paste and try to OC again.
batboy-- I do believe this CPU is good one, too.
Mr. Potatoehead and sifu quoc-- I had already move my memory around. I only have 1 of 256MB memory Thanks. :)
sifu quoc
05-30-01, 11:42 PM
no... indepth queue to 8 is for memory performance... 1 is for stability... but memory benches suck then....
i think it might be cooling... goto radio shack and get some thermal paste....
I'm sorry, i have no idea where is indepth queue. in the bios? I have BX6-r2 not BH6.
Thanks everyone :)
I learned something today, my BX6r2 board is not very good for overclock. This motherboard have the limit about 900 or up to 966MHz.
I know this because right now my P-3 700@903MHz ONLY use 1.55v , very stable.
When I look at the database I saw that most of CPU that use BX6r2 borad will not go over 900 or 933 or 966MHz.
I'm think about getting BX133-RAID or BE6-II V2.0 maybe BF6
Robert,
The bx6 R2 has been a very good board for overclocking in general.
With a really good processor and the latest bios upgrade, QR, it provides an fsb speed of 153 mhz which will get a 700 up to 1071 - 1073 mhz overall. The QR bios fsb speeds go up in increments of 5 mhz which should give you several opportunities to overclock above 133 fsb.
anvil
RC_Monet
06-04-01, 09:35 AM
Robert,
Try burn it in. My P700 can't even boot up with 933MHz at 1.95v when I first got it. after 4 hours burn in (100FSB at 1.95v), it's now running stably with 133 FSB at 1.95v. also cooling is important, I used EP5 6I11 with a further case fan up right to it, got 39C while burn in.
I tried to remove all cards from my board, tried different graphic cards, tried a lot of settings that I can think of in BIOS, moved memory around. Hard drive didn't lock up at all when I oc to 933 to 966MHz.
If I can run 903MHz at 1.55 rock stable, why isn't it run 933MHz at 1.6v - 1.7v (both game and windows)? It might be over heat. Why when I tried 143mhz and I got only 956MHz not 1GHz and motherboard stop working after I see Pentium iii 956MHz on the screen? Look like that the is limit.
I'm understand that this good motherboard and support up to X9 and 153mhz. But, will it very support that high? BX6r2 support 3.3v but BE6-IIV2.0 support 3.5v(more stable)
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