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Discussion Starter #1
I'm about to buy another waterblock for my second gtx 470 - I'm going to get another DD block because the last review I saw showed they added the least amount of restriction to the loop. I'm still using the pump that came with my RS240 Rasa kit, which is why I'm asking
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The other question I had was how big does my second rad need to be, SB chips don't really run that hot, but I think the 470s are going to be overvolted and running around 900 core if at all possible.

I noticed the difference in price between a low end 240 rad and a 360 rad isn't that great, is a 360 (like a Black Ice Xtreme III) + the rs240 enough for my setup?
 

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yup, two fc links, one for each card..

and about the bridge, are you on pcie slot 1 and 2 on your board or 1 and 3? I made the stupid mistake of ordering a dual bridge instead of a triple for my setup lol...
 

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Discussion Starter #5
Quote:
Originally Posted by Cyclonicks;13070266
yup, two fc links, one for each card..

and about the bridge, are you on pcie slot 1 and 2 on your board or 1 and 3? I made the stupid mistake of ordering a dual bridge instead of a triple for my setup lol...
1 and 2, physx on 3.

Thanks for the help
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Should be fine. I think it was wermad who was running the pump through a few blocks and whatnot.

Anyways, it's not like you bench under normal conditions haha
 

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Discussion Starter #9
How big of one?

Also I'm trying to be as cheap as possible here, not looking for top of the spectrum performance just better than air and less noise than stock 400 series fermi cooling.

If its really bad I can get a different pump as I already have a t-line built into the current system for that very purpose (so I don't have to get a res too).

The EK item is a bit too expensive for me, its $52 total
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I drew up a diagram so I could avoid costly SLI adapters and angled barbs, will this work? How bad are we talking on the performance hit, 5-10C, or more?

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Honestly even if I take a large performance hit at first at least I can dispel all this heat, having everything overclocked and overvolted is terrible when its not winter
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I think the issue is you won't be able to tell until you buy it all, set it up, and then test for temps. Your pump may also be running warmer than previously to touch. I would just go for cheaper SLI fittings and buy the block and give it a shot. You said yourself you don't want it to be a uber performance setup and I think it would more than suffice. It's not like you're adding a chipset block restriction wise
 

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Discussion Starter #11
I was going to forgo any sort of SLI connectors in favor of putting the cpu and one gtx on its own rad, and the other 470 on the rs 240 rad.

I know I have to keep my restriction low in order for this to work.

I'm trying to find some numbers so I have more information so people like Martin can get a PM from someone who has at least done some research into it.

Here is what I have so far:

Water Block has extremely low restriction:



DD GTX 470 water block (will have 2):

Are supposed to be the lowest restriction/high flow rate/low pressure drop blocks you can get for the 470s. I can't find any comparison charts for it though, but that was the reason I purchased the first one.

I've been trying to piece together this build for awhile now and I've been trying to buy parts that I can build on without having to continually upgrade the same parts.

Can you recommend a good low restriction/low pressure dropping 360 rad?

Also if worse comes to worse, before I grab a MCP350 /w top would it be possible to mod the current pump to work at 18v at least to buy me a few months of operation before sinking another $70 into this for a new pump?
 

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Danger Den low restriction data I have seen is from skinnee labs tests on the gtx480 full cover here:
http://skinneelabs.com/gtx480-full-c...ock-roundup/3/

Restriction of triple rad testing looks good for nearly anything but a Black Ice Extreme however the XSPC RX looks especially atrractive here: http://skinneelabs.com/triple-radiator-comparison-v2/2/

Martinm210 tested the XSPC Dual Bay Res 750 Pump here: http://martinsliquidlab.petrastech.c...mp-Review.html but only ran it to 13V. You would likely need some voltage modulator such as the one Koolance uses to bump the voltage to the D5-Strong Pump. Martinm covers that here:http://martinsliquidlab.org/2011/03/...5-strong-pump/

Good luck.
 

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Discussion Starter #13
Ty sir, thanks a mill
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So I was right about the DD blocks having very low restriction and high flow rates.

I think I can do this!
 

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I would always suggest just trying it before considering pump upgrades. You usually see people struggle with bleeding inverted rads etc long before having any significant thermal losses due to flow rate. Danger Den blocks are generally very low inrestriction as well as most rads.

You should focus on heat and rad/fan capacity first. If you have bleeding problems, that's when you might consider more pump. The difference on some cpu blocks between really low flow rates and exceptional is usually not more than a couple of degrees.
 

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Discussion Starter #16
I think a single 6970 would be a big downgrade, and a sidegrade from a single 470 on water.

Quote:


Originally Posted by Martinm210
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I would always suggest just trying it before considering pump upgrades. You usually see people struggle with bleeding inverted rads etc long before having any significant thermal losses due to flow rate. Danger Den blocks are generally very low inrestriction as well as most rads.

You should focus on heat and rad/fan capacity first. If you have bleeding problems, that's when you might consider more pump. The difference on some cpu blocks between really low flow rates and exceptional is usually not more than a couple of degrees.

Thanks a lot Martin, its always nice to have someone with your experience around.

As for rad, is the http://www.dangerden.com/store/x-flo...e_pro-iii.html (X-Flow Black Ice Pro III) for $57 enough with the RS 240 rad helping? Also is the restriction low with that or decent enough not to worry about it?

I want to get the rad and block directly from DD because the block alone is $30 cheaper on their site than frozen cpu, and I'd rather only have to pay shipping twice


Thanks again
 

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a 6970 is faster then a 470 and 570 lol so it wouldnt be a downgrade but probly not a big enugh upgrade when you can get another 470 so cheap. And charlie has said befor the pump in rasa kit is = or better then a mcp655-b and im running 2 blocks 2 rads and a cpu block on mine no problem.
 

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Discussion Starter #18
I don't think I said downgrade, I believe said sidegrade. I did say downgrade from SLI, which a single 6970 would be. In the tests/benchmarks I've seen the 6970 cf is is either slightly slower, slightly faster, or about the same at 1000 core as gtx 470 sli is at 875 core.

Anyways, this isn't the place for that sort of discussion. Thank you for the confirmation on the pump though, it helps to know others are able to use the pump with more restriction than I purchased it to push.
 
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