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680 block making gfx card bow.

Posted: Sat Jun 02, 2012 7:30 pm
by curious
Hello,

I had recently purchased the 680 full block and have mounted it onto my Zotac GTX680. After mounting it I had noticed that the gfx card is bowing. Is this normal?

I'm using the the screws that came with the block, and the plastic washers for all screws.
The thermal pad is the gray color one.

Thanks,
Curious

Re: 680 block making gfx card bow.

Posted: Mon Jun 04, 2012 6:41 pm
by Ace0751
Sounds like you mean it's bending. The waterblock will always be heavier than the card so it might bend. Did you put the black back plate on it again and is the card secured tight in the slot.

Re: 680 block making gfx card bow.

Posted: Mon Jun 04, 2012 7:39 pm
by Izerous
Waterblocks are somewhat heavy and will cause it to bend slightly. There are a few ways around it like vertical mount cases etc. Server cases some of them used to support the far corner of a video card, you can build something similar it if it enough to concern you.

Re: 680 block making gfx card bow.

Posted: Wed Jun 06, 2012 6:14 am
by curious
Hi guys,

It's not bending. How can I explain it...

When you look at the case from the open area, you can see the card mounted to the MB. You will see the card in a horizontal fashion with the SLI bridge on your left and power connector on your right.

Looking from the SLI side moving to the right, you will notice that it is convex. It's level from left, then starts a dip near the GPU area and goes level again toward the power connector. I am using the vid nix-680 screws with the washers, and the gray padding.

Re: 680 block making gfx card bow.

Posted: Thu Jun 07, 2012 3:50 pm
by Ace0751
How tight do you have the screws in. That could cause the issue all they need to be is snugged not drilled on the card.

Re: 680 block making gfx card bow.

Posted: Fri Jun 08, 2012 6:05 am
by curious
I dont recall, I'll have a look when I get home from work tonight.

Appreciate all the responses.

Cheers

Re: 680 block making gfx card bow.

Posted: Mon Jun 11, 2012 8:36 pm
by Mik
I've noticed the same thing with both NX 480 and NX 680 blocks on their respective cards. I think it has to do with the block being a lot shorter than the length of the card so there's no support for the card after the last attachment point. With the airblock you have a frame outside that supports it for its entire length so it's more rigid.
I installed the 680s only yesterday and they're still on test so I can't say much about that but the 480s (I had 3, all bowed) ran for years without any issues.
Just make sure your PCIE cables aren't short and are dragging on the back of the card. That could cause a problem over time. If you have a case which has a card holder the problem should go away immediately.

Re: 680 block making gfx card bow.

Posted: Thu Dec 20, 2012 10:12 pm
by nyeman
Guys did you get anywhere with this? I've created a new post but seems that still under review? I have an EVGA 680 SC Sig and have the same problem. Just to be clear the bend is happening NOT due to the weight of block since mine is not yet installed on the MB but rather on certain areas where the some screw is at. Didnt over tigthen it as well. I've screwed it very slightly just enough to allow the screw not to move.

Re: 680 block making gfx card bow.

Posted: Sat Dec 29, 2012 10:07 am
by VirtualJealousy
Have the same problem nyeman, Koolance support recommended using zip-ties or ordering a bolt/nut combo from another site like McMaster-Carr (The sales rep couldn't tell me the diameter of the bolt I needed). Really disappointed in the response from Koolance on this one, looks like the manufacturer is leaving us to to try and work around their obvious design flaw.

Re: 680 block making gfx card bow.

Posted: Wed Jan 02, 2013 4:33 pm
by VirtualJealousy
I was able to pickup a short 2.5mm machine screw and nut at radio shack that worked (Make sure to use a nylon washer). Longer 2.5mm screws also worked with screwing the EVGA Backplate and PCB to the blocks. If you're running multiple cards, the adjustable length connectors help a lot with suring up the cards.