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PCChips M863G 5.1 BIOS dated 03/30/2005

This BIOS was from a PCChips M863G 5.1C sold on NewEgg.
Apparently it is unique in that PCChips normally does 
not allow the FSB overclocking options given in this 
bios on this particular motherboard revision.

This bios allows FSB adjustment from 100 to 255mhz in 1mhz 
increments. For speeds much past 190mhz you WILL need 
to improve the stock NorthBridge cooling. Simply removing 
the stock northbridge heatsink, throughly cleaning and 
removing the thermal tape underneath and reattaching 
with THERMAL PASTE should be sufficent. Speeds higher 
than 200 I strongly recommend also adding a small fan. 
The normally cold NB gets very HOT past 200mhz.

The following assumes you are using a discreet AGP graphics 
card. It is unknown how/not the onboard graphics behave 
under overclocking conditions. My guess is not well, but 
i've never tried either.

In my daily use with good memory i've been able to run 
up to 251 mhz stable with a single 1GB stick of Patriot 
PC3200 cas 2 memory (set to 2.5 in bios) and an Athlon XP-
Mobile (bridge modded to a multiplier of 10 and voltage 
of 1.85v). The video card used was a Leadtek Geforce 6800nu.

You will want a strong power supply for this board if 
clocking past 2.5ghz. I feel my overclock is limited by 
the motherboards 2 phase power... Even with the processor 
voltage set at 1.85, under load this sags to 1.808. I can't 
complain, since i doubt this board was ever designed for 
this kind of abuse ;p

Also it is unknown what dividers the motherboard uses 
past 200mhz - i suspect it doesn't change after 200 as 
my floppy drive tries, but fails to function past 230 or 
so suggesting that at least the floppy controller is 
out of spec. All other components are working (USB, IDE, 
onboard LAN) but at unknown speed.

So your experience may vary greatly depending. Ironically 
i have no PCI cards installed to test. Although it hasn't 
happened to me (crosses fingers) i would be wary of hard 
drive corruption if your drive doesn't like the IDE speed
out of spec.

Good luck! I will say this board has been extremely stable 
once the bugs are worked out. It makes a fun sleeper machine 
at LAN parties since mATX easily fits in junk OEM cases 
like a Packard Bell - that alone will make the Alienware 
guy cry when you beat him in the tourney... =)

Enjoy
-xrror