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Can my loop be better, comments pls

post #1 of 12
Thread Starter 
I have completed my first W/C computer, and invite comments on better configurations to make my loop produce the most efficient flow rate and even temps between my two cards.
External rad is swiftech 320drive with 3 x TFC and 3 X multiframe noiseblocker fans.
ATM GPU1 is 71c at load and GPU2 is 51c.
I am thinking the large difference between the two temps is due to seating of the block more than anything else and needs redoing, but I thought it advisable to ask people who know if visually, there is a better way for me to route my water flow.



Thanks for your suggestions
Mike
post #2 of 12
i say the temp difference is because you are getting little to no flow through your first gpu... water will take the path of least resistance... which would be straight through to the second block and the negative pressure at the out port on your first card is just pulling the water straight through...

if set up properly the temp difference between the two cards should only be 1-2c
Edited by 808MP5 - 1/9/11 at 3:05pm
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post #3 of 12
Thread Starter 
This is a little confusing, for me, the bottom card in the pic is the one that gets warm to touch, but afterburner says GPU1 is the hotter card. How do I identify which card is being read as GPU1 ?

Could you suggest a better path then please, in reference to the top photo in--> to top card (left or right inlet)
Out from (top or bottom card) (left or right) as seem in the pic
Use both sli fittings or not ?

thanks
Mike
post #4 of 12
I see the video cards are in parallel........ I always got terrible results with the in and out ports being on the same card. You should have the inlet on the first card and the outlet on the second card to have proper flow.

Have it come in on the left top of card one, use both sli connectiors, and have it come out of right bottom on card two. Plug left side of bottom card, and right of top card.

Also, what pump are you using?
Edited by Jonesey I7 - 1/9/11 at 3:14pm
    
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post #5 of 12
Thread Starter 
Quote:
Originally Posted by Jonesey I7 View Post
I see the video cards are in parallel........ I always got terrible results with the in and out ports being on the same card. You should have the inlet on the first card and the outlet on the second card to have proper flow.

Have it come in on the left top of card one, use both sli connectiors, and have it come out of right bottom on card two. Plug left side of bottom card, and right of top card.

Also, what pump are you using?
ok that makes sence, Rad is a swiftech MCR 320 drive, so I believe the in built pump is a MPC 350

Edit, PS thanks, any other words of wisdom greatley appriciated,
Edited by Mixfloors - 1/9/11 at 3:24pm
post #6 of 12
if you don't mind and want to... it will be better to just run the cards in serial... in parallel you will not get even flow through both cards...

use gpu-z to determine what card is which or nvidia control panel

more than likely gpu1 is the top card and gpu2 is the bottom card
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post #7 of 12
Quote:
Originally Posted by 808MP5 View Post
if you don't mind and want to... it will be better to just run the cards in serial... in parallel you will not get even flow through both cards...

use gpu-z to determine what card is which or nvidia control panel

more than likely gpu1 is the top card and gpu2 is the bottom card
This could not be any more false. If set up properly, it actually helps flow and temps by about 3-5 degrees C. Having the inlet and outlet on same card is parallel is what will hurt flow ( as you can tell ) Your biggest problem is that pump is NOT a strong one, and the flow is not the greatest to start with.
As such, if you put them in series, you'll probably net worse temps, but on BOTH cards.
    
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post #8 of 12
Quote:
Originally Posted by Jonesey I7 View Post
This could not be any more false. If set up properly, it actually helps flow and temps by about 3-5 degrees C. Having the inlet and outlet on same card is parallel is what will hurt flow ( as you can tell ) Your biggest problem is that pump is NOT a strong one, and the flow is not the greatest to start with.
As such, if you put them in series, you'll probably net worse temps, but on BOTH cards.
care to elaborate why... i don't see how it will help in his situation... the water is in a closed loop and it's not like he has something to cool the water off between the two cards... i'm am certain he is not getting even flow through both cards
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post #9 of 12
Thread Starter 
Quote:
Originally Posted by Jonesey I7 View Post
This could not be any more false. If set up properly, it actually helps flow and temps by about 3-5 degrees C. Having the inlet and outlet on same card is parallel is what will hurt flow ( as you can tell ) Your biggest problem is that pump is NOT a strong one, and the flow is not the greatest to start with.
As such, if you put them in series, you'll probably net worse temps, but on BOTH cards.
One other option I have is that there is a second MCR220 installed internally to feed the CPU. I could turn the loop into a single one utilising 2 pumps in one loop. Everything is stock as far as O/C goes, would this serve me better as far a temps go ?
post #10 of 12
Thread Starter 
external rear rad



just so you can see, thanks
I chose these radiators for inbuilt pump and filler port. I know they are not the "best"out there, but do provide ease of mainenance.
Edited by Mixfloors - 1/9/11 at 3:41pm
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