williamdabastrd

I recently got a set of Iandh's heatsinks (which are awesome) and an Arctic Cooling Twin Turbo and put it on my Visiontek Radeon HD 4870. I used Arctic Cooling Alumina for the RAM and VRM and Arctic Silver 5 for the main GPU. I used 3dmark and Furmark as my torture tests, and GPU-Z and Everest as my temps.

I was very pleased with the results and I will post pics later, as I had to bulk up the VRM sinks a bit to make sure they were cool. Essentially I took the Twin Turbo sinks and mounted them on the Iandh ones.

Stock Cooling Temps:

GPU Core (DispIO) - 76 Idle to 88 Load
Memory (MemIO) - 88 Idle to 98 Load
Shaders - 78 Idle to 93 Load
VRM - 64 Idle to 126 Load (I'm surprised they didn't freakin melt!)

Twin Turbo + Iandh 4870 Sinks:

GPU Core (DispIO) - 39 Idle to 64 Load
Memory (MemIO) - 53 Idle to 78 Load
Shaders - 44 Idle to 74 Load
VRM - 47 Idle to 90 Load

Note: Using Furmark, my VRM tops out at 112, but that is the only program that goes higher than 90, so I consider it an inaccurate representation of 'full load'.

EDIT: Two things, 1rst, I think this might be in the wrong section, pardon my n00biness and 2nd, I was wondering if these temps are low, med, or high. Thanks

Acoma_Andy

It looks alright, but I expected better temps with that cooler.

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williamdabastrd

Yeah. Well my ambient was pretty high compared to normal (84F out, 92F+ in my room.), all the heat in my house travels up to my room and gets stuck. Sometimes 15F more than downstairs. I'll see if fixing my airflow and moving to a cooler area does anything.

Josh81

gpu temp is low

memory/shader is medium
and vrm is medium (it is supposedly able to go up to 109c or something like that)

i have the twin turbo and get the same temps as you...i just need to find a good VRM/memory cooling solution because in Crysis my temps were through the roofs on those, while my GPU stayed cool at 64c

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williamdabastrd

I use the Iandh heatsinks, which give just enough room to stick the Twin Turbo heatsinks on the sides of it. Also, I cover the chips next to the VRMs and they touch the fins of the Turbo. Increasing the area this way, for me, has lowered the VRMs significantly.

Today I retested after letting my TIM set in and I fixed a broken case fan. New temps:

DispIO - 33 Idle to 58 Load
MemIO - 46 Idle to 74 Load
Shaders - 37 Idle to 67 Load
VRM - 34 Idle to 89 Load

The difference between these and the previous temps is 1: cooler day today, closer to average temps and 2: more heatsinks brought the VRMs from 112 on Furmark to 93, Crysis brings it to about 80's after a good two hours playing 1680x1050 very high.

Lord Xeb

Get the Mushashi and put the sinks on them chips. I had it on my 4770 and it rocked will my 4770 lasted.

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Josh81

i'm going to buy the zalman RHS70..i'll post results

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williamdabastrd

Please do, I never even knew that existed! Looks like it would be efficient.

I've already spent around $70-$80 cooling this thing (25 for Iandh Sink, 35 for Twin Turbo, 10 for AS5 and Alumina, and X for shipping). I'm not gonna throw away more money lol.

PS: What do you mean while it lasted? Bought a new card?

OpTicaL

Your load temps are 10C higher than mine, and I'm running a 4890 OC'ed with a Scythe Musashi.

http://www.overclock.net/6373512-post19.html

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williamdabastrd

I've heard that the 4890s run cooler than the 4870s even on stock. Either way, those load temps are after an hour of Furmark on 1680x1050 and the post-processing. I've heard it drives the Radeons nuts temp-wise. I usually get 10-15c lower playing Crysis. Everything else I have doesn' t bring it to 100% (mostly valve stuff)