ABIT BM6 question

[Spuffin]

What is the highest speed the ABIT BM6 supports, and does it support AGP 2x?

 

[Drakkhen]

I have a Celeron II 533A that is running right now at 840Mhz. I think it will take up to 700mhz Celeron II processors as long as they are of the cB0 stepping. It has a problem with the amount of power that the cC0 stepping CPU's need.

 

[ModMan]

The problem with the cc0 Celeron and the BM6 is the reset pin has been relocated from pin location X4 to AH4. A jumper betweens these pins restores the reset function of the cc0 Celerons on the BM6.

The Celeron datasheet (pg 93) has this note which pertains to pin location AH4:

"6. This pin is only reset for processors with a CPUID of 0686h and beyond. For previous Celeron processors prior to 0686h (not including 0686h) this pin is reserved."

CPUID 0686h is the 566 cc0 Celeron. I'm posting with one in my BM6 which has been modified with the jumper soldered on the motherboard.

 

[Killrose]

I believe cB0 stopped at the CII 600 (?), and that now all CII's are manufactured with the new cC0 stepping, so even if you go with a new CII 566 or above, you had better be carefull because the BM6 in stock configuration does not support cC0 stepping CPU's. A powerleap adaptor will allow you to run the new steppings as well as PIII's. It does support AGP 2x . Because of the CPU core voltage limmitation of the BM6 (1.7v max) you have to becareful there as well when considering overclocking on the BM6.

 

[Rifter]

The voltage on the BM6 is not limited to 1.7v, i used to run my celeron 366@550 at 2.2v. on a BM6. And on the celeron II's you can get higher voltage using the Bios flshing trick.

 

[Killrose]

Rifter. Put a CII in there and the auto detect function kicks in. The board will only allow a top voltage adjustment to 1.7volts. And NO the bios flash trick does not work with the CII and BM6.

Oh, and by the way Rifter, let me be the first to congratulate you on going "Golden"
(check your count)

 

[ModMan]

You can also jumper the motherboard cpu pins to auto detect cb0 Celerons at 1.55, 1.60, 1.65, and 1.9 volts. Details can be found here:

Text

Extra auto detect voltages available using this procedure with the cc0 Celerons are 1.75 through 2.05 volts.

I can run my 566 cc0 Celeron @ 972 MHz (1.95 volts) with the jumper added for the reset function fix and another jumper* to enable voltage selection higher than default + 0.2 volts.

*These pins are adjacent and can be easily bridged with just solder.

 

[Killrose]

ModMan, wouldn't the rear window defogger kit trick currently being used on the Athlon/Duron work here as well? I'll try it this weekend and let you guys know.

 

[Spuffin]

I am currently running my 433 CeleronA @ 541 MHZ. So what is the absolute highest setting the motherboard can be set to run at, and I still would like to know if the mobo supports AGP 2x Thanks!

 

[Compnut]

Everone needs to rember that you can go down as well as up in the bios so if you jumper the vid pins to boot up at 1.9volts as soon as the bios screen comes up you can reduce the voltage whever you want it. I am running a 533cel at 960mhz 1.9volts core and a 566cel at 1020mhz 1.95volts. The 566cel has a golobal winfan heatsink modified with a 80mm fan and a copper shim and a coper plate between the cpu and the heatsink and Artic silver compound. I have run the 566cel at 1.95 volts for several months without problem. @.00volts core will cause problrms after running for a while. I beleve 1.95volts is the maximum safe voltage for the fc-pga cel. Get 120fps Q3normal sound on. Useing a overclocked Inno Geforce2 MX display adapter. Beats buying a new mob, power supply, and cpu to go the AMD route.

 

[Killrose]

Spuffin, the ppga celeron 433 was not known to do the 100mhz bus, i.e. 6.5x100= 650mhz, so your probably at your limmit with that processor. I don't know if that answers your question. You can buy a powerleap Neo adaptor and run the PIII if you like to spend money. Go to the Powerleap site and check their customer feed back, some people are using 800mhz PIII's . And yes the BM6 supports AGP 2x, as it uses the BX chipset.

 

[Rifter]

Killrose

Are you sure the BIOS trick would not work, i havent tried it myself since i got a duron instead of a CII but a friend of mine said it would work but you had to do it some funky way, anyways thanks for the congrats yay im golden now, would have been a while ago if the darn forums didnt keep crashing, at least thats fixed now, havent had a crash in a while.

 

[Killrose]

Okay Boy's I'm gonna have to change my sig: BM6 CII533@920 1.8volts. The Defrost repair kit trick works on these CII's and BM6's to get the voltage higher with NO HASSLES!!!
Connected VID0/VID1/Vss pins right on the CPU itself, now I've got 1.65-1.85volts in the bios to play with. Nice thing is if you screw-up, you just scrape it away, unlike solder if your not carefull....
Got it up to 960mhz, but my ram is only good cas2@115, and I notice it gets pretty warm after running QIII time demo's so I'm just gonna leave it where it is.

 

[ModMan]

I'm glad the window defogger trick worked for you. Here may be an easier way to change the voltage selection available. I just stumbled upon it at the BP6.com forum site: Link

 

[Killrose]

The site looks interesting, but I don't see any details as to what this bios really does. I wonder if it remaps the socket for cC0 steppings as well? Looks Finnish/Danish?
Does this alter the entire bios to a foreign language as well?

 

[ModMan]

I think it modifies the bios to create a new default voltage 0.2 volt above the current core voltage.

 

[Spuffin]

I would like to thank you all for your help. The ABIT BM6 supports a 600mhz celeron processor. And thanks to Killrose for being the only one that knew it supported AGP 2x