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Quietening a GTX460 with an HR-03 Plus

post #1 of 8
Thread Starter 
Hi.

The loudest part in my PC is the graphics card and last weekend I got around to finally quieten the damned thing. So I dusted of an old HR-03 Plus I had lying around and made a custom bracket to mount it to my GTX460.

All marked out, you can see the dimensions in the pic for anyone else who might want to try this.
PhqQB.jpg

After some cutting, drilling (3mm bit), filing and deburring with some 360 grit:
7zUXz.jpg

Mounted:
yVG2u.jpg
hk44n.jpg
rIxK8.jpg

While I busy with the tools I also cut a heatsink for the VRMs. Simply chopped up an XBox360 GPU heatsink, which is a very handy spare part to chop up for RAM and VRM sinks by the way - 15mm tall so it fits perfectly under Zalman VF1000s. biggrin.gif

Here you can see how it's mounted.
zcfh9.jpg

Do you think it's enough mounting pressure?

Components used:
4x Rubber washers from HR-03 package
4x M3 x 20mm bolts from Zalman CNPS9700 LGA775 mounts
4x Springs from Zalman VF1000 mounts
4x M3 mobo standoffs
The rubber washers helped to stop the bolts from slipping when I screwed the standoffs on.

Results:
Disappointing frankly. I tried a combination of fans - 120mm Zalman F3, 92mm NMB-MAT FBA09A12L-1BX and a 120mm ADDA AD1212LB-A71GL. In 25C ambients they hit 83C, 86C, and 84C respectively in OCCT, compared to the 73C with the stock Cyclone cooler. frown.gif

BUT then I took the HR-03 off and found... eek.gif
9M7iw.jpg

Yup, the HR-03's base is concave. I've never noticed it as I previously had it mounted on a G92 8800GTS (also had to drill some new holes in the stock bracket).

Now to lap it. Stay tuned.
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post #2 of 8
never noticed that the gtx 460 was a rectangular core...
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post #3 of 8
Quote:
Originally Posted by fshizl;12417687 
never noticed that the gtx 460 was a rectangular core...
it annoyed me to the great beyond when I was watercooling the cursed thing.
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post #4 of 8
Joined Oct 2009 and now this is your very first post!
Where have you been all the time?
Anyway, welcome again!
Good that your first post is something with substance. Good, I like it.biggrin.gif

One comment: another factor causing the poor result perhaps is that the thermal paste was applied too little? With that amount shown in the pic, it does not look like it can spread evenly enough for the entire surface to me.
post #5 of 8
Quote:
Originally Posted by windfire;12417879 
Joined Oct 2009 and now this is your very first post!
Where have you been all the time?
Anyway, welcome again!
Good that your first post is something with substance. Good, I like it.biggrin.gif

One comment: another factor causing the poor result perhaps is that the thermal paste was applied too little? With that amount shown in the pic, it does not look like it can spread evenly enough for the entire surface to me.

Or if both surfaces are lapped to mirror smooth surfaces, then you only need a little paste.

For me, I'm too lazy, so I just plop on a bunch of paste then sqeeze the heatsink and backside together as hard as i can until the paste starts coming out of the sides. I don't mind the extra paste on the sides, the IHS is raised pretty far off the pcb so the extra paste doesnt really touch the card. It also guarantees that I every corner of the IHS is covered when I don't have lapped surfaces, even if its a bit wasteful.
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post #6 of 8
Thread Starter 
I actually put on a straight line of AS5 about 1/3 the width of the IHS. But unfortunately the cooler's base is concave and didn't squeeze it out. There's nearly half a millimetre's gap when it's mounted.

I'm going to have a go at lapping it this weekend, gonna be a pita that's for sure. Hopefully it'll net me better gains than covering the whole IHS with paste.
Quote:
Originally Posted by windfire;12417879 
Joined Oct 2009 and now this is your very first post!
Where have you been all the time?
Anyway, welcome again!
Good that your first post is something with substance. Good, I like it.biggrin.gif

Thanks!
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post #7 of 8
Thread Starter 
Spent a few hours last night lapping the HR-03 and I'm very pleased with the result. With an ADDA AD1212LB-A71GL @ 9V (~1350rpm?): 72C running OCCT in 31C ambients (very hot summer weather today), aka 41C delta compared to 58C before lapping and 48C with stock Cyclone cooler. thumb.gif
ZZIad.jpg

The base is completely flat now as opposed to the concave shape before:
BrRk8.jpg

TIM spreads well now and impossible to remove the cooler without a lot of twisting:
6cZ2H.jpg
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post #8 of 8
Nice.
Thermalright have great coolers, but I really hate that concave base on all their coolers.
They say it's meant to be like that, well it's BS. Lapped my TRUE too, and love it now.

Time to start overclocking that baby now, it's a waste to not let 460's run at atleast 800/2000 smile.gif
Edited by Deluxe - 2/21/11 at 8:36am
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