Do you have the proper power supply for this? It requires that weird AT style connector as well as a 20 pin one.

This is what I am using an adapter to convert ATX to Dell style for this. But still not perfect as I tried number of video cards, Geforce2 and 4, Asus TNT2 AGP. No display, but can use PCI video cards with this.

I can resolder the dell style and shift the ATX connector over to ATX standard, remove the AT style connector but the bios Dell used is fussy and slow drawing the splash screen during POST boot up.

Cheers, pentiumspeed

I used HP Z220 to download A11 bios from dell then transferred file to usb stick then stuck this into thinkpad R40 with floppy drive in ultrabay and created a bootable disk with bios update and updated the Dell XPS T500 motherboard to A11 with no problem using old PSU with standard ATX pinout from dell old SFF GX270 as it has 3.5" floppy power connector already on the bench.

And I checked CMOS battery, indeed is dead, so I replaced that with new one. This got AGP working properly. I am able to use several AGP cards with no problem and drawing the Dell splash is quicker.

Yet, I could not use a Asus V3800 16MB (plain TNT2 card) which worked in other boards with 4x AGP, and I can use FX1100 and FX2000, Geforce2 and Geforce4 including Ti 4200 series on this Dell motherboard is it the quirks of the dell or the asus V3800 TNT2 not compatible with this dell board? I have a TNT2 M64 PCI that worked on any boards even this dell board.

Cheers, pentiumspeed.

weird, I've used several TNT2 variants oeuvre the years on these Dells without issue. Even an FX5200

Good to know it was the cmos battery as got the same system.

I would say its just an incompatibility. This motherboard is a true Intel board so for stability is better then the P2B, of course stability comes at the cost of advanced/overclocking features though.