The 3640 is crappy in that it's the slowest of all 040 boards, it doesn't allow to add more fastram (hence the slow speed due to banging for motherboard ram). It have several capasitors oriented the wrong way resulting in dying cards or worse. Add to that the incompability a 040 CPU brings with it in the first place it belong to the "hall of shame". I must admit one of my A4000 have a 3640 card only because the 3630 is too damn slow and I've not yet stumbled uppon a cheap Blizzard4030 or 060 card.
