7900GT volt-reg heat problems

[Mikebert4]

I've volt modded my 7900GT to 1.55v on the GPU and 2.2v on the VRAM,

temps on RAM and GPU are all sub 50'C (thanks to watercooling and Zalman passive ramsinks)

however, I've noticed that the two chips in the photo both get really hot (60-80'C and higher)

This is really just a warning thread to anyone thinking of doing the same, you'll need a heatsink on these chips...

I placed a couple of the low-profile Ramsinks on mine, and temps are down to 40-50'C (still hot, but hey, what can you do?).

Also, whilst i'm having a moan, The low-profile RAMsinks don't fit onto the back of the RAM chips on the 7900GT, because the resistors get in the way, and you end up needing about 3mm of thermal tape to ensure a contact... I just distrubted the sinks to other hotspots around the card, but still... grrr..


Probally not worth a thread, but does anyone have any Idea's/suggestions as to a) keep them volt-regs cool
b) fit Ramsinks to the back of the card?



here's the photo I mentioned above:

 

[james.miller]

im suprised that reg doesnt have some sort of sink on it. remember the metal plates on the back of the 9700/9800's?

 

[Mikebert4]

true... they've really gone for basic, simple cooling, it's just a copper plate with fins spot-welded onto it and a little 40mm fan..(my card is XFX but i think it's the same for all 7900GT's)

it seems weird, the 7900GTX has that great hulking mass of heat-pipy goodness on top of it, which does the core, RAM and regs at the same time, why not impliment somthing similar for the GT? it's only 0.2v less on the RAM and core...


*shrug* i'm probally going to end up fabricating my own waterblock for the v-Regs in the end... it's getting annoying