SuperMicro

[shotgunwillie]

I have a SuperMicro P6DBE Dual Slot1 Motherboard and I have two separate questions:

1: I have heard there are undocumented bus speeds available above the 66 and 100 MHZ speeds the board admits. Can anyone tell me how to use these undocumented bus speeds.

2: The board has a Max CPU multiplier or 7 for PIII processors. If I use a PIII 750 or 800 won't the CPU just ignore the Multiplier and run at its correct Multiplier since it is clock locked anyway.

Chess Grogan

 

[DieselMan]

This must be your lucky day! You can up the FSB by going into your chipset settings in the bios, and simply change the mode #. I think mode 0 and 1 is for default FSB, mode 4 (or 3 can't remember) is for 112 FSB, mode 3 (or 4, not sure) is for 83 FSB, and some versions have even mode 5 (133!). Good luck!
The P6DBE is definitely a great mobo; it's just too bad the bios is so complicated for some people

 

[DieselMan]

Update: Before I sold my second 600E cpu last night, and thus losing my dual rig system (now it's just one 600E on a different motherboard), I tried the mode 5 I mentioned above. You don't get the 1/4 divider for your PCI bus at 133, so you'll have your pci bus running at 44Mhz!!! Basically, it's the same story at the Tiger 100 for 133 FSB. Make sure you use GOOD MEMORY, I had to run my RAM at cas3. I couldn't fully test mode 5 because my Raid IDE card and my SCSI card would not work at 44Mhz PCI bus, but I think that's a sign it's working
Also, someone emailed me telling me that there was no mode 5 (only 4). You probably need to flash your BIOS with Release 3.0... Et voila!

As for higher multipliers, you are correct in that the mobo should autodetect, but I am not sure if it does. However, SuperMicro does not recommend P3's higher than 600Mhz (if you have Rev 1.2, that is; the story may be different for Rev 2.0). Good luck

 

[Braxus]

I'd recommending updating to BIOS v3.1. Adds Windows 2000 ACPI support which is really spiffy if you use that OS. Also adds the CPU type/Speed post to the main POST screen as well as some other small features here and there. It's in their Beta BIOS directory... Seems very stable to me for a beta BIOS!

I have a rev 3.0 board w/Dual Celeron 504s on it.

 

[DieselMan]

Thanks Braxus for your input
Unfortunately, I don't have the board anymore so I can't test it.

Bump for all supermicro P6DBE owners!