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How will I know if my pump can't handle the added restriction? - Page 2

post #11 of 18
Thread Starter 
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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post #12 of 18
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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post #13 of 18
Thread Starter 
Ty sir, thanks a mill

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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post #14 of 18
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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post #15 of 18
I would say sell the 470 and wb and get a new gfx card. one monster is better than two good cards.

EDIT: no disrespect to the 470, im just not a huge fan of SLI/CF 470s over one card like 6970 or 580. JMO
Edited by FXTOi7 - 4/11/11 at 6:04pm
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post #16 of 18
Thread Starter 
I think a single 6970 would be a big downgrade, and a sidegrade from a single 470 on water.

Quote:
Originally Posted by Martinm210 View Post
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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post #17 of 18
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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post #18 of 18
Thread Starter 
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.
Edited by BallaTheFeared - 4/12/11 at 2:00am
    
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