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Older s1156 board won't post with newer CPU with proper bios updates, help?

faxon

Platinum Member
I own an MSI P67A-GD80 S1155 board which I was originally using with a 2600k as a multigup gaming box. It's since been converted to a litecoin miner and the CPU was harvested to go into an ITX gaming box instead, and a celeron G-1620 was ordered to replace it. The vendor ran out of 1620s and opted to ship me a 1630 for the same price, but unfortunately the board doesnt support it. I've been running the CPUs in their not intended boxes for quite some time and finally, well outside the return policy for the CPU, went to swap them to the intended boxes. I went and updated the bios to the latest revision, but didn't check to see what CPUs were supported officially on the site beforehand. It turns out my CPU isnt listed and despite the chip being effectively the same as the G-1620 except .1ghz faster it won't even post. I then went to frys figuring I'd swap it for a G-1620 and sell the open box for a few bucks less on craigslist (or reuse in a miner later) and be up and running right? Nope, still no post. It still works fine with the 2600k but just wont post with an IVB CPU.

Things I did other than swap to a listed compatible CPU: Swap out to 1 stick of ram (Tried all sticks in all slots), reset bios, disconnect all non needed devices down to a single GPU and no hard drives, check the socket for pins that werent making contact and checked CPU undersides, both were fully indented and nothing on them. Everything I know says this system should post but I've had absolutely no luck and I'm stumped. Ideas?

edit: Yes I'm aware of the issue in the title, its S1155 not 1156 I'm using and all CPUs are socket compatible
 
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I'm running the latest bios, I thought I mentioned that I thought but it appears I may not have. I'm wondering if the bios update didn't fully take except that the EFI for the board had some functionality added that wasn't there before I updated it so I figured trying to just run it again would be a moot point (especially since there's always that risk of bricking on an update). Gigabyte also emailed me back explicitly stating that there would be no new bios updates for the board as far as they know.
 
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