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mdkathon
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Socket FM1/AM2/AM3 heatsink bracket specs?

Sat Jan 07, 2012 1:53 pm

Hello TR!

I rarely post but spend a lot of time reading throughout the site and forums. Always love the opinion and insight everyone has here. I have an interesting question due to a little failure I ran into last night on my ASRock A75M Socket FM1 motherboard.

Reading online in numerous places it was said that AM3 heatsinks will fit on FM1 boards. I had a Phenom II AM3 heatsink from another build laying around and figured I might as well use it on my FM1 board as it has copper heat pipes and is quite a bit larger than the stock FM1 sink. So I went through the process of swapping them out and after about 10 seconds of the AM3 heatsink being mounted on the FM1 board it snapped the bracket plastic on both sides. Whoops.

Now I'm really wondering if the tension specs are the same between the two platforms even if they share the same size. Though that's a bit of an afterthought now.

What I am trying to figure out now without having to rip into my other systems is if FM1 and AM2/AM3 heatsink bracket screws share the same dimensions. I'd like to go pick up something like a Hyper 212 today from Frys and just mount it without the heatsink bracket but I have seen conflicting compatibility information about heatsinks that have their own mount system that replaces the plastic brackets.

1) Has anyone mounted something like the Hyper 212 to their FM1 boards?
2) Does anyone have a link to some decent schematics regarding the different screw patterns on AMD platforms?

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JustAnEngineer
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Re: Socket FM1/AM2/AM3 heatsink bracket specs?

Sat Jan 07, 2012 2:23 pm

I had an old Xigmatek HDT-S1283 lying around when I assembled my Socket-FM1 system. It seems to be working fine there. The clip did feel tight, but it wasn't enough to damage the socket.
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mdkathon
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Re: Socket FM1/AM2/AM3 heatsink bracket specs?

Sat Jan 07, 2012 2:32 pm

JustAnEngineer wrote:
I had an old Xigmatek HDT-S1283 lying around when I assembled my Socket-FM1 system. It seems to be working fine there. The clip did feel tight, but it wasn't enough to damage the socket.


Yeah. The best thing would be to find the specs regarding tension and see if they match, or if AM2/AM3 can allows for a higher amount of pressure. I guess I am just being lazy and need to start digging on the AMD site. :D
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Bauxite
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Re: Socket FM1/AM2/AM3 heatsink bracket specs?

Sat Jan 07, 2012 2:44 pm

I'm going to go with the heatsink sucks, it was a fluke/bad part...or you did it wrong.

I've moved my noctuas around various AM# and FM1 boards with zero issue, and AMD's own docs have the sockets as exactly the same regarding heatsinks. (in other words, if an ODM heatsink was validated to be put in AMD's own branded boxes for # TDP AM2/3 cpus, it was accepted for FM1)

For your #2 there are some pdfs you can dig up on AMD's site.
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Re: Socket FM1/AM2/AM3 heatsink bracket specs?

Sat Jan 07, 2012 3:06 pm

I don't think I've busted the heatsink retention tabs off since the Socket A days. Sounds like a defective mounting bracket to me.
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mdkathon
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Re: Socket FM1/AM2/AM3 heatsink bracket specs?

Sat Jan 07, 2012 6:50 pm

I agree re: bracket being defective. Not nearly as many builds as some of the folks on here but I do 10-20 a year for myself, friends, family, etc. Maybe $10k/year of parts and this is the first socket snafu i have ever seen, funny thing, it's not the actual tab, it broke near the screw posts on each side. Anyway I went the Home Depot route and am attempting some plastic epoxy. It's going to be a PITA to RMA or attempt to purchase a new bracket via the interwebz.
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JustAnEngineer
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Re: Socket FM1/AM2/AM3 heatsink bracket specs?

Sat Jan 07, 2012 7:30 pm

Assuming that they are interchangeable, there are lots of folks with socket-AM2 or AM3 heatsink retention brackets lying about after they've installed something with a custom clip like the Corsair H70.
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mdkathon
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Re: Socket FM1/AM2/AM3 heatsink bracket specs?

Sat Jan 07, 2012 8:23 pm

Yeah. Already posted on CL in Seattle. :D
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