M17X R3 installing GTX680M faliure with black screen with 7 beeps

I recently bought a dell GTX680M on eBay, the seller listed it as new from M18X R2, I used A12 BIOS and disabled the Intel GFX before installing the card, but unfortunately, after I installed the card, when I powered on the machine, it did not post anything and had 7-beep each time, I've searched online that 7-beep is most likely due to CPU failures, and many GFX faliure are 8-beeps, and when I removed the 680M, powered on again, it turned out to be 6-beep, that indicated the 680M card and MOBO got connected when the 680M was on, and when I swap back my HD7970M, everything was fine as before. Thus, I have no idea whether this 680M is dead or I have wrong settings, and I did see the seller's eBay feedback as seller, seems not like a lier, or is it DOA? Anyone could help with this problem? the VBIOS on the card is 80.04.5B.00.02.

 

Check if the card is properly seated / follow this guide, skip vBIOS flash http://forum.notebookreview.com/ali...17x-r3-680m-compatability-63.html#post9038829

 

It may be DOA, try what j95 suggested. If that does not help you may need to send it back to the seller.

 

Tried to push the heat sink hard after removed the screws, it posted successfully, BIOS detected NVIDIA GFX and no problem with booting windows, I've repeated the test many times, successfully everytime, thus, the card is still good, it may be either the gold finger needs to be cleaned or the heat sink I bought need to be seated properly, any suggestions?

 

Thanks, enjoy !

Thermal Pad Placement/ +quality thermal compound Gelid Solutions GC-3 Extreme Thermal Compound - 3.5 Grams (TC-GC-03-A) - FrozenCPU.com

 

Are you using the thermal compound in the link? I feel overheated when using 2960XM, even I only set the 4 active core turbo to 35x, it may get overheated and shut down when I running some benchmarks, and when I swap back my 2760QM, the worlld become cool and quiet, I'm using MX-4 in my system. Have you used any other thermal compound in your R3 before? Is it supposed to be cooler than MX-4?

 

Well done, I modded the X-plate in the back by cutting the memory cover and still used those thermal pad to cover the back memory unit, then installed successfully, I have OCed to 1024/1200, the graphic score of 3D Mark 11 went to P8225.