Does EK have GTX280 and HD4870 FC blocks coming soon ?

[ppost]

Yes, but with such a high failure rate I am a bit concerned. Do I need to use the spacer on both sides of the block, I am assuming that only the copper side needs them? In any event the thread on the SLi connectors I used is so short that I could not fit a spacer even on the copper side of the block. What you say about at least getting a signal for a short while is true, that is why I am confused. I will try again when I get the backplates. Any other help/insights would be appreciated such as how tightly I should attach the blocks. My main concern when attaching the block is making sure that the smaller NVIO chip is getting good contact, as I know that this chip runs very hot.

The paper spacer obviously helps to increase the holding area and avoid damaging the screw holes/card for taking the block weight.

Sorry, I don't quite understand what you meant by "the thread on the SLi connectors I used is so short that I could not fit a spacer even on the copper side of the block". Anyhow, it does not sound like to be the cause of card damage.

There are successors who run the card properly even without the back plate. I was also once reminded that the block is designed to leave specific gap distance between the block and the NVIO chip, for GTX280 should be 0.5mm, thats the same thickness of the thermal pad which comes with. It was 1mm thick gap/pad for 8800 instead. Block attachment shall never be too tight causing obvious bending.......Same, this should also not be the issue to cause your problem.....

Other than the card is already short-circulted anyhow, or other significant physical damage to any chips, my last guess will be an excessive TIM was applied on the core which the card was over bended to feed the screws.

Really should re-install the stock fan next and RMA them as first priority if needed and possible. Wish you luck.