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WC'ing new build, need some advice - Page 2

post #11 of 15
One loop is always more efficient than two.

Let's say you have a CPU loop with a 240 rad and a second GPU loop with an other 240 rad.

So you want to load your CPU and pump voltage to do some encoding. Your CPU needs all the cooling power as the GPU is idle for this task. Your CPU would love to use that second 240 rad but it can only use the one rad in it's loop while the GPU rad is idling and being virtually useless.

Same if you play a game, your GPU is crancked up while your CPU is idle. Your GPU can use all the rads you can throw at it, but you have that CPU rad doing nothing.

With a single loop, you get all the cooling power where it's needed all the time. While in a dual loop, you almost always have half your rads being useless. You rarely max out both CPU and GPU at the same time, so a dual loop will almost always result in half the rads being almost useless.

There is no performance advantage to dual loops. If anything, it will only cost you more for the two pumps and reservoirs. And you have the added noise of two pumps and the added heat of two pumps. So with dual loops you pay more money, have more noise, have more heat injected into your loop, and you get less performance.

Do it for the looks or just for fun, but don't go dual if it's performance you are looking for.
Edited by PepeLapiu - 3/1/13 at 10:25am
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post #12 of 15
Thread Starter 
Thank you all for your suggestions!

I'm just about to pull the trigger on the following:
Fans: http://www.frozencpu.com/products/10323/fan-674/Scythe_Gentle_Typhoon_120mm_x_25mm_Fan_-_1850_RPM_D1225C12B5AP-15_Hot_Item_.html?id=4FrowV3i&mv_pc=1246
Tubing: http://www.frozencpu.com/products/12989/ex-tub-865/Masterkleer_PVC_Tubing_12_ID_34_OD_-_10ft_Retail_Pack_-_UV_Blue.html?id=4FrowV3i&mv_pc=1247
Res: http://www.frozencpu.com/products/13380/ex-res-294/Koolance_RP-401X2_Single_525_Reservoir_for_1-2_PMP-400_Pumps_Rev_11.html?id=4FrowV3i&mv_pc=1248
Pump: http://www.frozencpu.com/products/16591/ex-pmp-201/Koolance_PMP-400_38_ID_Native_Liquid_Cooling_Pump_PMP-400.html?id=4FrowV3i&mv_pc=1249

I'm guessing I still need barbs?

I already have a rad, but I wanted to go ahead and leak test it until next paycheck!

Actually how about these barbs: http://www.frozencpu.com/products/15240/ex-tub-1215/Alphacool_G14_Thread_12_13mm_ID_FatBoy_Barb_-_Deep_Black.html?id=Vn6sQoj4&mv_pc=1655

I assume they come in 1 per pack, so I'll need 4 to at least test my loop.

Also will these screws work with my BlackIce Stealth GT rad?
http://www.frozencpu.com/products/16055/scr-344/M4_x_6mm_Pan_Head_Screws_-_4_Pack_-_Black.html?id=Vn6sQoj4&mv_pc=1656

I need something to bolt it to the case, the screws they gave me were wayyy too long. And only fit the Rad + fans
Edited by xxhaloownerxx - 4/21/13 at 7:48pm
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post #13 of 15
Thread Starter 
Alright, I've bought everything aside from the last 2 Gentle Typhoons and the backplate.

I have several issues.

I am testing my loop outside my case right now using a PSU from an old build, and leak testing it before I throw it into the case.

1. My pump constantly runs dry when filling, making an awful noise. Once I got everything filled I noticed a leak on my first rad, so I switched out a piece of the tubing. The pump made a loud high pitched wine, and now runs considerably louder than before.

2. I can't seem to get all the air bubbles out. I tried dish soap, and it just ended up making a huge mess. As well as having several large air bubbles in the loop.

3. When attaching the pump to the res, I used a silicone lube to make a better seal. Is that okay to do? I read somewhere that it was, but I can't find it again so I'm just making sure.

Really worried my pump is forked
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post #14 of 15
1. Never run a pump dry. Whether you've already damaged it or not is unknown, but usually bad noises means that either you got junk (flux or something) in your pump or you've damaged it.

2. Bleeding takes time and patience depending on how you designed your loop. Don't use dish soap unless you've got 100% distilled water and only use a silver kill coil. (any other additive like dye, biocide, or anti-corrosive or whatever will get messed up by the soap and clog things up)

3. I use trimmed Teflon plumber's tape, but the O-rings really ought to be good enough for most connections. Whatever you use, make sure that it won't be in contact with the water.

- Did you flush out your radiators before using them? If not, you'll need to take apart your pump and make sure you don't have junk from the rad in there screwing things up. From the factory they tend to have things like leftover flux, bits/shavings of copper/brass, and sometimes bits of fiberglass or other things depending on how the rad was made. After flushing 6 rads, I had about 2mm thick of junk at the bottom of my filter.
post #15 of 15
Thread Starter 
Quote:
Originally Posted by Electrocutor View Post

1. Never run a pump dry. Whether you've already damaged it or not is unknown, but usually bad noises means that either you got junk (flux or something) in your pump or you've damaged it.

2. Bleeding takes time and patience depending on how you designed your loop. Don't use dish soap unless you've got 100% distilled water and only use a silver kill coil. (any other additive like dye, biocide, or anti-corrosive or whatever will get messed up by the soap and clog things up)

3. I use trimmed Teflon plumber's tape, but the O-rings really ought to be good enough for most connections. Whatever you use, make sure that it won't be in contact with the water.

- Did you flush out your radiators before using them? If not, you'll need to take apart your pump and make sure you don't have junk from the rad in there screwing things up. From the factory they tend to have things like leftover flux, bits/shavings of copper/brass, and sometimes bits of fiberglass or other things depending on how the rad was made. After flushing 6 rads, I had about 2mm thick of junk at the bottom of my filter.

Gotcha, I did flush out both of my rads with hot water before testing them. I've taken out the pump/disassembled the pump and everything looks okay, its just really loud for some reason.

Is there a good way to prime a my pump? It also runs really hot, not sure if there's anything I can do about that either.

http://www.overclock.net/products/koolance-pmp-400 - pump
http://koolance.com/rp-401x2-single-5-25in-reservoir-for-1-2-pmp-400-pumps - res

I'm going to throw everything back together one more time and see if it still makes the noise
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