View Full Version : P3 Overclocking
03-18-2001, 03:31 AM
How good are P3's @ overclocking? I have a 650 and would like to overclock it. How high can I run it w/o frying the chip?
03-18-2001, 01:26 PM
depends what type of P3 you have...if it is a 100MHZ bus speed one, you should be able to fire it up at 133 FSB or better, no sweat.
03-18-2001, 07:36 PM
Ok. I have the following system configuration.
P3 650/100 Processor
Abit VH6 MB
The motherboard supports 133 MHZ FSB, so I want to overclock my chip to that. How do I go about setting the FSB up to 133? Will I need more cooling? (I just have a regular old processor fan)
If I set the FSB to 133, Does that mean I will have a speed of 6.5*133=864.5 MHZ?
04-01-2001, 03:41 PM
I have a CbO 650/100 chip. I have no problems at 866/133 @default voltage. 897/138 requires me to goto 1.70 volts
"How do I go about setting the FSB up to 133?" This should be done in the bios colinfield. Its likely you'll bump up the voltage as cruelpupet had to do.
"Will I need more cooling? (I just have a regular old processor fan)" Maybe. I have a PIII 600e that does 800 Mhz with the regular cooler.
"If I set the FSB to 133, Does that mean I will have a speed of 6.5*133=864.5 MHZ?" Yes around 866Mhz.
VH6 specs: http://www.abit-usa.com/english/product/motherboards/vh6.htm
04-08-2001, 08:10 PM
You should hit 866 easily. If it's unstable, knock up the voltage a bit. If it's still unstable, use better cooling.
Also, make sure you have PC133 memory. If you don't, make sure you set the memory to run at fsb-33.
You should also use this program to help your memory performance:
04-09-2001, 01:23 AM
...keeps a database of overclocked cpu stories-kinda slick.
Anyway, I'm curious now...it seems that most people believe that CuMine-E's should do 133 without problem. I can take mine to 120x8, but at 133-no post. This this a P3-800 thing, or is my cache just stinky?
I would not expect a PIII-800 to do 1064 Mhz Bires. The high multiplier is what the problem is. In comparison many of the lower multiplier PIII 700e's do 933 Mhz.
In addition the .18 micron Pentium III line has reached its limits. Intel recalled the PIII 1.13 Ghz after having problems with it. This is the reason why Intel is coming out with the .13 micron fab size of the Pentium III during the 3rd quarter. 1.13Ghz and 1.26 Ghz will be the speeds released with that fab size.
[Edited by sbp on 04-09-2001 at 02:37 AM]
04-09-2001, 01:44 PM
spb is right. 1066 for your 800 is very unlikely. The P3 core maxes out from 900-1000Mhz.
If you can do over 1000Mhz, consider yourself lucky.
04-10-2001, 12:00 AM
...thanks guys. I'm happy with 115x8 anyway. It is sooooo fast, I don't care that there are 1.5GHz comps out there.
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