The 8K5A2+ & 8K5A3+ are the same only the 3+ has 4 UATA 133 connectors for the Highpoint 370 RAID chip as where the 8K5A2+ has 2 just like the 8K3A+ has and my 8K7A+ has as well
Nice find btw, from who did you get that board?
I haven't got such a board. I only know that it exists.
I own an Asus A7S333 Rev. 1.03 (SiS 745). On page 2, the manual states "SiS745 Chipset supports AGP 4X/2X mode." However, I have no idea and cannot find any information about whether its AGP is 1.5 V only or also 3.3 V. The slot itself is realised as Universal AGP.
FSB is limited to 133 MHz, 166 MHz is only for memory clock. So performance is it not really fast.
EDIT:
On page 60 of the manual one can read: "AGP Capability [4X Mode] This motherboard supports the AGP 4X interface that transfers video data at 1066MB/s. AGP 4X is backward-compatible, so you may keep the default [4X Mode] even if you are using an AGP 1X or 2X video card.
[1X Mode] provides a peak data throughput of 266MB/s even if using an AGP 2X/4X card.
[2X Mode] provides a peak data throughput of 533MB/s even if using an AGP 4X card.
Configuration options: [1X Mode] [2X Mode] [4X Mode]"
It reads like this board supports 3.3 V on AGP as AGP 1x and 2x cards are 3.3 V only.
But is this for sure?