PCI-AV264CT  v1.3

Media Bus Audio/Video Card

Made by ASUS

ATI Mach64 CT GPU chip with 1MB VRAM installed

Sound Blaster Vibra16S with connectors for MIDI (Game Port) and wavetable

This card is for the Version 1.2 or 1.x MediaBus slots

the Asus P/I-P55SP4 and P/I-P55TP4XE and P/I-P55TP4XEG motherboards have such slots

and we do have such motherboards for sale

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count the number of pins on the extension part of the bus, 

68 pins (34/side) = v1.2,  72 pins (36/side) = v2.0 

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interesting, that these cards are labeled as v1.3 but we have seen no documentation

to suggest that there is a v1.3 of the MediaBus, so maybe it is a card revision

to upgrade to the full 2MB requires 2pcs of 16x256 SOJ-40 Fast-Page RAM