Trouble with PCI slot

Sep 4, 2018
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Recently purchased an X8SIL board from ebay with an x345. Was going to throw in an old GTX 460 i had laying around but the slot is too short. From what i can tell its just a normal PCI slot, but cant find much else about it. Anything i can do to convert it so it can use a PCI-E card or what are my options if i want to put a gpu in it?

Link to board:
http://www.supermicro.com/products/motherboard/Xeon3000/3400/X8SIL.cfm?IPMI=N
Link to manual if thats anyone:
https://www.supermicro.com/manuals/motherboard/3420/MNL-1130.pdf
 
Solution
All 3 slots are x8, although one is electrically only x4. There used to be plenty of cards with x8 connections such as the GT730 but modern cards like the GT1030 seem to have the full x16 connector even though they are only electrically x4 cards. Perhaps this is so they can use the latch which is only fitted to x16

Nowadays x4 and x8 slots tend to be open-ended to allow plugging x16 cards into them, but I've carefully broken off the end of closed-end slots many times. In every case it seems to work fine with 60-70w cards although technically, x8 slots are only required to deliver 25w.

GTX460 is a 150-160w card so if it only has a 6-pin must pull the full 75w from the slot. However many GTX460 came with two 6-pin power connectors.
All 3 slots are x8, although one is electrically only x4. There used to be plenty of cards with x8 connections such as the GT730 but modern cards like the GT1030 seem to have the full x16 connector even though they are only electrically x4 cards. Perhaps this is so they can use the latch which is only fitted to x16

Nowadays x4 and x8 slots tend to be open-ended to allow plugging x16 cards into them, but I've carefully broken off the end of closed-end slots many times. In every case it seems to work fine with 60-70w cards although technically, x8 slots are only required to deliver 25w.

GTX460 is a 150-160w card so if it only has a 6-pin must pull the full 75w from the slot. However many GTX460 came with two 6-pin power connectors.
 
Solution
Good news the top slot doesn't have a back like you guys said. The bad news is I can't get it to display anything though. Using a 7570 as a placeholder card and still nothing.

Edit: Bad ram was causing it to not startup. Gonna have to play around with the GPU but otherwise its all good