[ibmkg]

Both of these card did not have any sink/cooler on RAM.

I had took temp readings of RAM during load and it did not go beyond 40C (used a probe).

8600GT is passively cooled from factory. It has Cu heat pipes and Al heat spreaders with no fans. No sink/cooler on any of the RAM chips.

And due to all that I did not sink the RAM chips.

I got another 8600GT now. I lapped the Cu block, re-designed the mounting and it is working good.

Idle Temp:
GPU = 45C
CPU = 40C
System = 32C
Room = 31C