PCI-E won't work with CPU that supports it

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Honorable
Dec 10, 2013
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10,510
Hello.

I have a BIOSTAR TH61 ITX, info is here; http://www.biostar.com.tw/app/en/mb/introduction.php?S_ID=548
It says that the PCI-E 16X is only supported with i5/i7 of the 3*** range. Now before, i had a 2nd gen pentium dual core in it, and sure enough didn't work. OK not a big deal, I expected it.

I've now put in an Intel Core I5 3570K Ivy Bridge @ 3.4Ghz, but the PCI-E still doesn't work, I've got a GT240 in there for testing (and I know the GT240 works, as it's come straight out of my other unit) Is there something I'm missing here, or do I need to go into BIOS and manually acknowledge there is a GFX card installed, or what?

If it helps, I have updated the BIOS to the latest (this was actually a requirement to support 2nd gen 22nm i5 on the board)

Thanks in advance for any and all replies.