Moving into colder waters-build log I guess - Page 3

Kal-EL · #1 08-14-2010

flow rate goes to crap on the swiftech under sub-zero but see what you can get bro

ny_driver · #2 08-14-2010

Thanks Hondacity.

But what would be a better pump to get for sub-zero? I could just use the Swifty for the gpus.

I'd like to figure out how to chill that radiator for the gpus just a little so I don't get any frost or wetness, but gpus stay nice and cool.

How about this..........cut a hole in the top of my chiller lid to mount my radiator in, 1 fan blowing in and 1 blowing out. EDIT: I could have them both blowing out if I made some air vents around the lid. Then it would maybe get a little colder than it got on the front of the a/c.....ya think? And the compressor would probably run a little bit more

How much of an effect would that have on my cpu temperatures? Pretty much none I bet.

What do you think of my plan?

or

Neuromancer · #3 08-14-2010

Air circulation works in two ways...

When the air is colder than XXX it cools XXX if the air is warmer than XXX it warms XXX

If you go second loop... I would just put the rad in the bath TBH... if you place your I/O right like Kal suggested earlier you will get enough medium moving through the fins...

But I am just guessing...never done it myself.

TBH.. it seems like GPUs benefit less from cold than CPUs... at least from what I see on the bot... there are of course exceptions either way.. but ... I would say wait for winter Imean submerge now... but if its too much load for serious Ocing... wait for winter..... get some fan extension cables.. throw your GPU rad out the window

I kept a pretty decent 0c on my AMD setup with just a 480GTX sitting outside...(and 4 ultra kaze 3Ks pumping air through it

)

Unfortunately the VRMS were not getting cold enough so I was still limited.

ny_driver · #4 08-14-2010

I had already planned on trying it outside when it gets colder.

I considered submerging the rad, but I figured it would get colder than I want. I just want it colder than it would be on regular unchilled water. And I don't want to interfere with the cpu temperature if possible.

I think my idea would work for what I want it to. I don't want to mess with insulating the cards from frost.....yet.

EDIT: I could do that too, but I can't use DICE all the time. So it'd be a pain in the ass.

Kal-EL · #5 08-14-2010

I would get a DIce pot for the cpu and use the chiller for the gpu/blocks and clock to holy hell!

Hondacity · #6 08-14-2010

you need to insulate first bro...

anyways regarding the pump...i just researched pumps cold water...best way to fight cavitation because of slush...

dual pumps is the answer...

hope that helps..

Kal-EL · #7 08-14-2010

A chiller cpu block is needed in this hobby. Wonder if Buckeye is up to the task?

Patch · #8 08-14-2010

Welcome to the team!

I never did a chiller so I don't have much to add. It sure makes for fun pics and it looks like you're having a blast in your subzero excursions.

Neuromancer · #9 08-14-2010

My chiller experience was tossing the rad outside in 10 degree F weather lol.

Never got frost.. but my house is not insulated well.. Only hit 0C on the software probes.

Personally... I would freeze the CPU and get what you can out of the GPU. only cause of hwbot. GPU just don't scale like CPU under cold. Problem is no one cools the whole card... you can expect the rubber whatever to eventually cool it all but it aint like a full cover heatsink or something...

VRMS get hot still... (VRMs on my 4890 totally limit the clocking ability) I am not a GPU ln2 colling guru though.

(You take that mass versus responsive ness argument and apply it to rubber .. yes rubber cools the whole card but it aint really KEEPing it cool... )

ny_driver · #10 08-15-2010

I do have 3 x EK FC-4890 full cover blocks. VRMs should get nice and cool with those if I did go that route. You're absolutely right about the VRMs getting the hottest.

I'm just going to go with air for now I think. It'll be fun to listen to the power of all 3 of those fans going........get drowned out by the sound of the compressor

In the meantime I can look for a DICE pot, and get everything nicely insulated.

------------------------------------------------
EDIT: I ordered the Dragon Skin

Hopefully it will get here by Friday when I get home from work....it's only coming from Pennsylvania I think.......at least that's where the address on the website is and my money went.

EDIT: I also plan to do something very close to this when I get home from work (hopefully Thursday night).