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[Official] NVIDIA GPU Mod Club - AKA "The Mod" - Page 4

post #31 of 8626

Blah, can't figure out how to embed video on here, but that E3 vid of the PNY models, thats what I was talking about on he 620/920 thread. I believe they daisey-chain 2 920's (due to the radiator and dual fan setup) for the 2nd GPU/CPU combo (1:59 on vid), the question is HOW without getting air pockets on the part of the loop that goes from the CPU to the GPU. I think this is another practical mod you guys can do as well, and I may try to do this for my CPU/single GPU setup, but add a radiator as well and a Northbridge Block into the loop, just so I can eliminate any possible air in the lines. The only issue I will have is my GPU is not a reference GTX460, so I don't have the 2 part heatsink/fan for the VRM's and Memory on the GPU, as mine is a Windforce 2x Gigabyte model. I my have to hit-up someone that upgraded his Reference cooler to a water block setup.


Edited by reaver83 - 1/31/12 at 7:05pm
    
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post #32 of 8626
Quote:
Originally Posted by reaver83 View Post

Blah, can't figure out how to embed video on here, but that E3 vid of the PNY models, thats what I was talking about on he 620/920 thread. I believe they daisey-chain 2 920's (due to the radiator and dual fan setup) for the 2nd GPU/CPU combo (1:59 on vid), the question is HOW without getting air pockets on the part of the loop that goes from the CPU to the GPU.

Umm..Air pockets..How about connecting all the pumps, pipes and everything and then submerging the rad in a small bucket or a large bowl of that fancy water cooling coolant mixture they sell. Then remove the out pipe and turning on the pumps with a jump started PSU, letting the rad suck in the coolant and push it out of the open pipe. I would think within half and hour most of the air should be out and then you could keep the pipe submerged for a bit and just plug it in?
post #33 of 8626
Hey guys just an update on my setup!
700
So I finally got my copper heatsinks in for my mosfets!
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I also got arctic silver alumina thermal adhesive for them
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BEFORE
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IN PROCESS and some more closeups *NOTE* the copper heatsinks did leave maybe about 1mm on each side of the mosfets untouched i dont think this will be a problem as 95% of the mosfet is definitely covered I just want a confirmation maybe if someone knows.
700
450
450
450
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and with a little bit of magic + luck....
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SUCCESS! biggrin.gif
now time to abuse the hell out of this thing with some nasty overclocks devil-smiley-019.gif
post #34 of 8626
^^ Great Job Bud +1 thumb.gif

On the 3rd pic, whats that black cover thats covering half of the card? looks like you already had some stock cooling / heat sinks on the card? This Looks great, but I wonder how hard does that thermal adhesive stay on? I mean if you ever had to RMA the card it probably would not be an easy job removing those sinks without causing any damage?

its about time you show us some sick overclocks bud. MOAR VULTZ, MOAR MeGAHuRTZ!! tongue.gif
post #35 of 8626
I just wrapped up a mod today with a pair of 570's! We are experiencing 43C load with 955mhz at 1.1v.

337

Ill try and drag user Griffulas in here so he can join with the above rig. New to overclocking but picked it up very well.
post #36 of 8626
I have a question about lapping the actual die cover for a more even contact between cooler and the gpu.
I have access to a lapping machine at my university used for making thin sections.
I could get any surface I put on the machine to within one micron across the entirety of the surface.
Would this be too perfect that it doesn't actually give the best amount of contact area to diffuse heat?
Any ideas?
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post #37 of 8626
Quote:
I have a question about lapping the actual die cover for a more even contact between cooler and the gpu.
I have access to a lapping machine at my university used for making thin sections.
I could get any surface I put on the machine to within one micron across the entirety of the surface.
Would this be too perfect that it doesn't actually give the best amount of contact area to diffuse heat?
Any ideas?
no. it would be perfect.
i have no idea how large one micron is but with a surface that flawless you may not even need thermal paste lol thumb.gif
post #38 of 8626
Quote:
Originally Posted by LilScrappyD View Post

Quote:
I have a question about lapping the actual die cover for a more even contact between cooler and the gpu.
I have access to a lapping machine at my university used for making thin sections.
I could get any surface I put on the machine to within one micron across the entirety of the surface.
Would this be too perfect that it doesn't actually give the best amount of contact area to diffuse heat?
Any ideas?
no. it would be perfect.
i have no idea how large one micron is but with a surface that flawless you may not even need thermal paste lol thumb.gif

A human hair is ~100 microns. He would still want TIM even if all surfaces in contact were perfectly flat (don't forget to do the base of the cards cooler if possible) because the goal of TIM is to replace any possible air in between the metal surfaces. So he would just need to use very little on a perfectly machined connection of IHS to cooler base, because it would spread so well.
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post #39 of 8626
Quote:
A human hair is ~100 microns. He would still want TIM even if all surfaces in contact were perfectly flat (don't forget to do the base of the cards cooler if possible) because the goal of TIM is to replace any possible air in between the metal surfaces. So he would just need to use very little on a perfectly machined connection of IHS to cooler base, because it would spread so well.
maybe a TINY bit but hed need to make sure to apply alot of pressure to make sure it spreads to ONLY fill in those micron sized chasms, and thus allowing the flawless portions to sit flush.
post #40 of 8626
You cannot lap the actual die. It's where the cores are and actual processing transistors. Your lapping that will most likely start removing the actual transistors killing the chip. It's a mirror finish anyway. Why would you want to lap that? That's crazy and nuts!
450


It will never get any better than what it is. The heat spreader can be lapped, yea, but not the actual die underneath.


I just bit the bullet and got the 620!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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