Hi,
Bios up to the last ver ( compatible with 1.3 rev ), everything is working ( mounted a t-bred B 2600+ 133fsb with 2 sticks of 256 mb ram ), so far i've mounted an awe64 gold on the ISA bus, a voodoo 2 sli on PCI 2 and 3, a S3 Virge on PCI 4, PCI 5 is free, a 320 gb ( fully recognized thanks to the bios rev ) HDD which i use on dual boot mode ( win98/winxp ) as slave on ata100 mode and a DVD driver ( PIO4) as master on IDE 2 ( cause on IDE1 i get troubles ). Got VIA 4in1 4.43 on win 98/Xp installed. PSU 450 watts working.

I can't see any scratches, bad caps ( those ones seem visually ok ) or similar shits on the mobo. The user which i bought this mobo from told me that the mobo has worked well since now and that he used as AGP card an ati radeon 9800 Pro aiw.

Actually everything is working well ( all drives and cards listed above working well on win 98/winxp ) BUT the agp slot. In fact, when i mounted a geforce 4600 ti and tried to boot the pc up with agp through the vga port, i got an heck of "surprise": the infamous 3 beeps without any post, being able to post and boot up just by pci video card ( s3 virge ).

Tested everything out ( unmount and remount agp card, moving out a ram stick and swapping them each other, setting on bios agp speed 1x 2x and 4x, mem entrance 16-32-64-128 mb ecc..., VGA irq assignment, PCI/AGP display first, disabling com1-2 and lpt ports thinking of an irq's conflict, CMOS clearing, starting with fall-safe and optimized defaults, a fresh OS install, ecc...), but got any solutions so far. The agp slot seems to be good as dead...

Finally i mounted another agp card ( a radeon 9100 ): same as above; then i mounted each of these cards on another mobo ( acorp 7kta3 ), AND they all worked. SO i can assume that the cards are NOT the problem.

NOW, am i missing anything about or really should i have to give it all up to hell?