Correct, but it doesn' t melt. It warps, which is different. There' s no really good way to explain it, other than it sort of bubbles around the GPU concavely. A melted motherboard is for all intents and purposes, toast. A warped motherboard can be re-warped back into place. If you' re brave enough to replace your x-clamps the minute you get your 360, the chances of you getting a heat-related GPU connection failure are slim to none. These are the figures Xbox-Scene (one of the sources of the X-Clamp mod) has pulled together.
Current results:
1. Fixed the 3RLOD. No issues at all now, no freezing, works fine: 770 consoles.
2. Fixed the 3RLOD. Video still freezes occasionally: 18 consoles.
3. Mixed results. Sometimes works with no 3RLOD: 8 consoles.
4. Did not fix the 3RLOD: 67 consoles.
I did some quick number crunching, and the results show that almost exactly 90% (89.5 to be exact) of the boxes that had the clamp mod performed were brought back to a usable state. (not counting the 3rd result)
The Elites were using the redesigned " Zephyr" motherboard, who' s differences (structurally speaking) were a couple holes for the new heat sink. No change in how the actual materials that made up the board.
The boxes
still red-ring.
The " Falcon" 65nm was redesigned, however there was no change in the quality of the motherboard components. Same company making ' em, same company designing ' em. And yet, they' re still more reliable.
In the end, it all boils down to the X-Clamps. Yes, there are other slight manufacturing and design flaws that help your box on its way to a red-ring, however it' s Microsoft' s 15 cent x-clamps that are costing them over a billion dollars.