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Old January 28, 2011, 04:37 PM
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Default Adding a 4870x2 to my loop?

So I will so be replacing my 4870 with a 4870x2 (single card, not crossfire) and i know its going to be hot and noisy. I am thinking about using a full cover water block to cool the card.

right now my loop goes;
- mcp 655 with ek front,
- 360 swiftech rad,
- enzotech luna cpu block,
- followed by a swiftech micro res, rev.2
-1/2" barbs are used and 3/8" tubing (long story short, ordered wrong tubing, using until I get new stuff)

I can run this 24/7 at 4.1ghz on my 1090T with only + 1 or 2 over ambient temps. So my plan is adding the 4870x2 to my loop after the CPU.

Will this add to much heat or should I throw in a "y" after the rad and then combine again before the res?
any other ideas?

`Adam
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Old January 29, 2011, 12:49 PM
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under full load, the card pulls about 300w. i wanted to watercool both my 4870x2's when i had them (hope you enjoy it!) but i would have needed a quad rad just for the gpu's, and a triple for the cpu (most people recommend triple for OC'd 130w chips)


what kind of case do you have? to be honest, the card isnt that bad in a case with good airflow. i added a silverstone AP181 in my 700D behind the video card, and my card is damn near silent under full load. wasnt the case when both cards were in there though, even with the AP181
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Old January 30, 2011, 10:07 AM
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My case isn't that bad for ventalation. all my watercooling is outside on the attatched the othe one side. i have a 120 on the side (blows right at my 4870), with a mesh side. 3 x 5.25 bays are open at the front with another 120mm fan. I got a 120mm fan pushing air over my hardrives (1 disk 1 ssd), and 2 80mm fans at the back as well.

temps in my case right now, after 2 hours gaming are;

CPU : 26 c
GPU : 50 c
SSD : 30 c
disk : 31 c
Mobo : 23 c

with ambient being about 22 - 23 c
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Old January 30, 2011, 12:30 PM
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I had a swiftech 360 running an i7 920 @ 4.0ghz and a 5870, was plenty of cooling capability for gaming. If I ran a benchmark on both, it did push it up a bit in temperatures. I would assume you'll be in roughly the same boat as I was, perhaps a bit more heat - but if you use some quality fans I doubt it'll be an issue.
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Old January 31, 2011, 05:39 PM
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thanks thats good to hear. I'll likely get a DD waterblock, whenever I get the cash..
got the card installed today ran furmark xtreme testing everything maxed for a bit over half an hour maxed at 81 degrees c, so its all good.
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Old February 1, 2011, 12:14 AM
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It's never a bad idea to get some kind of fan controller. That way if you're not happy with the water temps you can always turn things up while gaming.

Personally I think your triple is just fine for your CPU and GPU.

Audirs is A) confused about power vs heat watts, and B) recommending something that ludicrous overkill unless you're running like 700RPM fans...
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Old February 2, 2011, 07:29 AM
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well the card draws about 300w as i mentioned, which means there is a lot of heat that needs to be dissipated. i think the formula was your max draw * 85% will give you the heat your rad needs to dissipate. i mentioned the quad rad because i had 2 4870x2's i wanted to watercool, and each card basically requires a dual rad to cool it efficiently.

that being said though, the op already has great temps from the looks of it so the 1 card shouldnt bring his temps up that much. just saying i researched this when i wanted to watercool both cards, and a dual rad is recommended for 1 card by itself. this is just a rough estimate. there are rads that are more efficient then others, and can dissipate more heat with the same fan setup among the rads
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Old February 2, 2011, 08:17 AM
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Quote:
Originally Posted by audirs View Post
well the card draws about 300w as i mentioned, which means there is a lot of heat that needs to be dissipated. i think the formula was your max draw * 85% will give you the heat your rad needs to dissipate. i mentioned the quad rad because i had 2 4870x2's i wanted to watercool, and each card basically requires a dual rad to cool it efficiently.

that being said though, the op already has great temps from the looks of it so the 1 card shouldnt bring his temps up that much. just saying i researched this when i wanted to watercool both cards, and a dual rad is recommended for 1 card by itself. this is just a rough estimate. there are rads that are more efficient then others, and can dissipate more heat with the same fan setup among the rads
Definitely, thicker rads are better, especially with higher RPM fans. Also some rads are optimized for low rpm fans as well. With that being said, people tend to overkill it with radiator space. However if you have the room for it, and the money - do it :)
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Old February 2, 2011, 09:24 AM
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well right now I'm kinda limited with space. In the near future though that should all be gone as I'm using an old air conditioner for a chassis. wanted to do a cube like chassis, but the air conditioner was free.

right now its been striped and gutted, and i'm creating a 1/2" square tube frame to increase strength. Eventually I plan on running a 4 x 120 for cpu, and mobo. and a 4x120 for hopefully dual 4870x2's or 5970's someday lol.
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