PCI to AGP adapter

PCI UNIV to AGP 1.0 1x adapter

-on board 5V and 3.3V power supplies, with maximum current exceeding AGP specs. 3.3V AGP VCCIO separately filtered. All power is drawn from the PCIe power connector, zero power is drawn from the PCI slot.
-high speed level shifters, the adapter can be used in any PCI slot, 3.3V or 5V IO. Works with at least 95MHz PCI clock.
-jumper for identifying as a 33MHz or 66MHz PCI capable card.
-two fan headers, accepting 3/4 pin fans, 5V/12V fans, with adjustable PWM

Tested successfully with Voodoo 3 2000/3000, various Banshee cards, Voodoo 4 4500, Vodoo 5 5500, Nvidia TNT2, Intel i740. This adapter doesn’t support AGP sideband signaling, AGP texturing etc. Not all systems/cards will be compatible with this adapter. Also, because the adapter increases the height of the card, not all cards are mechanically compatible, for example the V3 2000 won’t be able to fit in a regular PC case due to the position of the VGA connector.

Full design files (schematic, PCB, gerbers, BOM) are attached below:

10 Replies to “PCI to AGP adapter”

  1. Thank you very much for sharing your cool design!

    As I’m not familiar with the MSP430FR2433IRGE, is there programming needed to work as fan controller?


    1. Hello,

      Yes, it needs to be programmed. I’ll upload the code later (if I still have it).
      The board will work fine without programming it or without it at all, just the fan headers won’t work.

  2. what about something that plugs into the AGP port and have pci-e on the other side.

    I know there was a bridge chip that did APG to PCI-E as that was used on allot of cards to make them compatible with pci-e and had the chip built on but i would like the adapter.

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