Originally Posted by Galaksekongen
I have been into looking into doing a mod like this for a long time, and fortunately a colleague of mine, pointed me to this thread
I will be modding a 7970 Vapor-X with a Antec 620.
I already have the cooler, but i am looking for heat-sinks for the ram, and i am going to mount a 92mm fan someway to cool the vram aswell.
I am planning to use zip-ties for the cooler-head and do some ghetto mount for the fan aswell.
- i ran into a few questions i was hoping some of you could help me out with.What size are the ram chips? (what is the maximum size for the heatsinks)I saw some people mentioning a copper "shim", why is this needed, and what size should i get? (i reckon it is going inbetween the GPU dice and the Antec cooler-head, with termal paste on both sides?)
Hope to see some of you expertise rain on me, so i can start my mod asap.
P.S, of course i will make a worklog with plenty of pictures and information when i get going.
RAM chips shouldnt need a heatsink, only the VRM does need a heatsink, with active cooling directly over it.
After looking at more pics from different vendors some allready have a seperate heatsink.Club3D 7970 Royalace example
not sure about your card, cant find any naked pics of it.
On my card (Asus 7970DC2T) i just removed the heatsink itself, and kept the VRM heatink and backplate on there
But after going through my boxes i noticed Asus also deliveres a seperate heatsink aswell
for LN2 use (before they started locking cards
You will need a copper shim becous the actual GPU DIE lies abit lower examble of the bottom of a normal heatsink
Since the H620 is completely flat, you'll need something to fill the gap EKWB copper shim i used
Some ppl have removed the gray metal around the GPU so a water block could make direct contact.
if you use a shim, paste on both sides.
Anyway, its not hard todo with zip ties at all if you are abit handy. Just make sure you align everything properly. (i had try 2 times aswell)
If you have a spare card lying around, you can always practice on that! i had an old 4870 that i tried on a few times first.
Just keep an eye out on the temps the first time you load it. idle temp should be around 10-ish °C over room temperature, load 20-30°C higher.
Keep an eye on VRM's aswell
Thinks you will need:
Small Zipties to fit through the mounthing holes (minimum of 8 for 1 mounting attempt)
Bigger zipties to go around the H620 (bigger so they dont flex as much)
1 copper sim
Heatsinks for the VRM, unless your card allready has one.
Thermal paste (imo preferably non conductive)
H620 & graphics card (duh