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15* delta in cpu loop on a 480mm rad? - Page 2

post #11 of 21
Thread Starter 
Quote:
Originally Posted by allikat View Post

Wait, your inlet pipe to the CPU starts collapsing when the cpu gets warm? That is not a good sign.

Yep... my tubing is 1/2"id x 5/8od and the suction between the my block and pump is too much for it haha. But its only when it gets really hot, like when I run prime or something not in my day to day use.

Its a stable clock from what I can tell now (backed down to 4.04) but I have a feeling I got crap TIM due to my core temps still reaching high 80's within minutes with prime.
    
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post #12 of 21
Can u give us realtemp shots of idle and load? And state ambient? That's much more enlightning

With prime im loading at 58C but i have a sextuple setup. But you should be getting 61ish to 63ish
Edited by douglatins - 3/16/12 at 9:17pm
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post #13 of 21
I thought water delta was the difference between ambient temp and water temp. I'm confused. My i7 920 runs at 4ghz (1.3375v) at about 67c load at 25c ambient, with a 420 rad and a bad fan set up (work in progress).
post #14 of 21
Quote:
Originally Posted by Captivate View Post

I thought water delta was the difference between ambient temp and water temp. I'm confused. My i7 920 runs at 4ghz (1.3375v) at about 67c load at 25c ambient, with a 420 rad and a bad fan set up (work in progress).

Water delta is radiator cooling capacity. you measure the temps of the water coming in and out of the radiator. Reviews usually work like that. The good ones. That water delta you speak of is just load delta over ambients. Water or air cooling.
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post #15 of 21
Quote:
Originally Posted by Captivate View Post

I thought water delta was the difference between ambient temp and water temp. I'm confused. My i7 920 runs at 4ghz (1.3375v) at about 67c load at 25c ambient, with a 420 rad and a bad fan set up (work in progress).

delta t is Rad Intake Air Vs Water Rad Outlet
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post #16 of 21
See, everyone is saying different things.
post #17 of 21
I think your choice of fans is contributing to your performance problems. Scythe slipstreams @ 1900 rpm - based on a post in the Scythe official forums - have static pressure of 2.3mm H2O.( http://www.scythe-eu.com/forum/ideas-innovations-rumors-about-new-products/253-scythe-slip-stream.html#post1827 ) Your radiator has 20 fpi. Because of this you would probably see better results using fans with higher static pressure. Medium speed 120x38 fans from Panflo or EBM Papst would be my suggestion for improving your performance without increasing noise. Per fan performance testing by Martin the 86cfm Panaflo gives about 4.57mm H2O. The EBM Papst should give about the same pressure. Comparing this to your slipstreams you will see that it is about twice as much static pressure.
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post #18 of 21
Thread Starter 
Here is are my idle and load temps after I downclocked the cpu from 4.1ghz @ 1.35V to 3.8~3.7 at stock voltages. (running p95 8 threads standard blend test). I believe the temps are quite high for stock voltages. But it is holding so I can complain.

I believe that it had allot to do with the amount of time it took my TIM to cure as my temps have dropped a fer degrees every day since iv installed the loop. Perhaps I will be able to bump back up to 4~4.1ghz again once I replace the 1/16" wall tube with 1/8" due to it collapsing when the system heats up.

IDLE
338

LOAD
338
    
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post #19 of 21
Having the tube collapsing like that can reduce your flow rates dramatically, fit it and you should notice a difference.
post #20 of 21
Thread Starter 
Quote:
Originally Posted by Systemlord View Post

Having the tube collapsing like that can reduce your flow rates dramatically, fit it and you should notice a difference.

Im working on it, I originally intended to use 1/2"id 5/8"od braided tubing but i could not get it on the barbs without twisting it on with some serious force that would undo unscrew the other barb haha.
To fix the problem, iv ordered a few quick disconnects, they should make it MUCH easier to maintain the loop with the heavy tubing.

As for the tubing collapsing reducing flow, they may be beneficial to me as its an extremely short cpu only loop with very little resistance. Im sure even the MCP350 is pushing way over 1gpm through the block.
    
CPUMotherboardGraphicsRAM
i7-930 EVGA SLI LE MSI Gtx 480 6gb OCZ Fatality ddr3 1600 
Hard DriveOptical DriveCoolingOS
Seagate Barracuda 7200 1TB Samsung Koolance 480mm rad, MCP350, 4x 1900rpm Scythe S... Windows 7 64bit 
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22" AOC HP wireless elite Rocket Fish 900W NZXT Tempest Evo 
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Seagate Barracuda 7200 1TB Samsung Koolance 480mm rad, MCP350, 4x 1900rpm Scythe S... Windows 7 64bit 
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