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Okay since you are discussing water block design albeing for GPU, I have a question.
If flow is important, then why do so many blocks have squared off edges.
As where being curved and streamlined? Like long oval shapes.
Or have (can't think of term) but vertical fins that are longer yet allowing for flow..............like fins on fish/whales
thing, long, curved.....................someone get my meaing, having a brain freeze at the moment.
Try to make it as little 90 degree bends as possible. Especially that 180 it'll kill flow. You don't have to make it too restrictive either. They are mobile gpu's heh.
Don't worry, I have more ideas, it was a simple puttin that one down on paper.
Also, in dealing with flow, a properly placed corner can introduce turbulence, allowing more of the water to contact the surface, ensuring better heat transfer. That said, there are some major nitwits in block design too.
Picked up my old Maze4 CPU and had a brainstorm, more later...
Edit: Check this out, it's not as refined as I want it, but it's a lot closer. Tell me what you think this time...
looks like it would work
well, before I start PMing people, I would like to know if a independent loop with a Thermaltake Tide Water Plus will give a overall better temp for all my components, since the CPU is also being cooled by the 1/2" loop.
Tell me if moding a Tide Water Plus this way will give better temps overall:
The WC case will be verry close to the case, and the overall tubeing will be verry short to maximize head pressure. My plan is to change the Tide Water Plus's design from a parallel cooling solution to a series cooling solution with shorter transparent tubeings, a T-line instead of the reservoir, the copper radiator will be cooled in between two SanAce fans (the spot with less blind spots that I found), and the tubeing wont be bent as narrow as the Tide Water's interior. Without the mod these blocks (Which have a copper interior) could cool a 7950GX2 core at about 35 C Idle and 42 C Load. They will probably perform even better with this mod.
This is how the Thermaltake Tide Water Plus looks like out-of-the-box:
http://www.tweakpc.de/hardware/tests...tideplus01.jpg
This is how I want to mod it:
http://img200.imageshack.us/img200/6...titled10lt.jpg
It looks like a pretty good solution for those who want to OC a 7950GX2 and cant find or dont have the money for a custom block.
If the custom block kills performance on the whole 1/2" loop, or if its too complicated to build, then I will probably go with the Tide Water Plus solution shown above.
If this solution it more efficient than running it with the 1/2" loop, is there a custom loop that will perform about the same or better that will cost cheaper?
Quote:
Originally Posted by Kayin
yeah see that is waht I was trying to say, though if you don't mind I altered it a little bit, would a design like this have any affect positive or negative over the original?
Make the vertical fins longer into and out of the curve to for more surface area.
I'll CAD something up once I get aCAD 2007 DL'ed.
Would this design work?
I didnt know what pints to put where the question mark is :P
http://img271.imageshack.us/img271/8...omblock0ma.jpg
Practically all you need there is a single fin.
The big deal with GX2 blocks though is that the sinks cover RAM and the bridge chip, both of which must be cooled and I'm betting that watercooling the RAM will allow a rather nice OC on those, considering how twitchy my x1900 XTX was about RAM temps.
I just got my PS back, I'll make a cleaned up version of that block and post it up, if anyone here is interested in messing with the design.With PS I can make a lot better curves and stuff, though, so it'll work a lot better.
If someone can shoot me the dimensions I have to cover I bet I can do even better... I'm flying by the seat of my pants as it is.
Pic three, this is a much better quality one...
How about something like this to solve the ram-sink issue?Quote:
Originally Posted by Kayin
Would uneven ram cooling be a problem?
http://img236.imageshack.us/img236/5...mblock23fn.jpg
I dont think the SLI controller on the 7950gx2 will need watercooling.
A passive chipset cooler or a large ramsink seems enough to me.
I'm gonna go out on a limb and say possibly not, but I won't be the guinea pig.
Technically that design will work, though. And from what I know of bridge chips (HSI/Rialto) the cooler it runs the faster it goes. I'm not the ultimate authority, mind you, just very well read and rather interested in cooling design. It would benefit from some more turbulence, and shot- or media-blasting the channels will add some surface area as well.
Well, I just made those two blocks without fins or pints just to show a possible solution for the GPU block. With a channel already created, one can simply fine tune it to the proper resistance so it disipates heat well.Quote:
Originally Posted by Kayin
Let us know how they go...
What do you mean?Quote:
Originally Posted by Kayin
I dont have the tools nor the skills to make a GPU block :P
Thats why I made this thread. I just asked questions and proposed solutions to see if anyone here knew if it can work so I can ask a block builder to build me one.
But first, I would like to make sure if its really worth adding two more blocks into my loop or should I make it a separate 1/4" loop using the Thermaltake Tide Water Plus. Check post #30 above to see if you can help me.
http://www.xtremesystems.org/forums/...6&postcount=30
Please read carefully, since some questions are scattered around the post and I dont know if the drawings could be complicated to understand
How about this design?
The tubes that overlap the memory chips will act as ram waterblocks, and the rest of the memory chips will have ram-sink.
Waterblock Gurus: Is this the optimal 1/2" ID solution for the 7950GX2, or is there a better design?
Note that the fins on the waterblock are right above the GPU and it covers all the GPU area.
As Burn sugested, I spreaded out the 1/2" ID chanel to compensate the narrow space, so it will be like a wide but flat 1/2" chanel. (Second pic)
I also made a small mountain where the fins are to increase pressure in that area.
http://img271.imageshack.us/img271/4...mblock34ph.jpg
http://img515.imageshack.us/img515/8...block325oo.jpg"
http://img296.imageshack.us/img296/5...block339py.jpg
why not spread the base out so it covers the ram too? it would prolly cool the ram enough!
Nice :DQuote:
Originally Posted by Turok
Because watercooling the GPU is more important than watercooling the memory.Quote:
Originally Posted by eXa
The performance gains from watercooling the memory vs passively cooling it with ram sinks is verry small (AFAIK).
Watercooling the ram also makes each waterblock more restrictive.
It also increases the cost for each block, because whoeven can make that block for me will have to use more copper.
I also think its enough to cool the SLI controler on the left with a small pasive chipset cooler.
thx :DQuote:
Originally Posted by eXa
So is it too hard to build it?
Will it perform verry well?
Any detailed comments?
Ive never built a waterblock,
so I dont know if everything is perfect.
i think you could simplify it a bit more! maybe doing ala EK blocks over the core. and i didnt mean exstending the entire block over the ram just the bottom. so not more restrictive than without. i think passively cooling the ram would make it heat up pretty good in there!
if you move right out(in)let more to the right you dont have to make the channel sving back into the center again! just run it straight out like the other!
Do you mean like this?Quote:
Originally Posted by eXa
http://img47.imageshack.us/img47/332/7950gx2exa13uo.gif
Or like this?
http://img47.imageshack.us/img47/172...gx2exa25sz.gif
I made the previous one into a 'U' shape, because I thought it was resistant enough to pull out heat, but unrestrictive enough to get good flow.
I saw is as if the water enters straight down and crashes on the curve, the fins, and the little mountain pulling out all the heat it can, and then it exits upwards doing a small turn absorbing a bit of heat as it takes the turns.
Like a suden crash and then a steady flow outwards.
In case anybody was interested in this thread, I posted about a block for the 7950GX2 posted on the INQ today: http://www.xtremesystems.org/forums/...6&postcount=16
This is how it would look with the legs that hold it, the ramsink, and the heatsink on the SLI controller.
Is there anyone with a 7950GX2 that can build it?
I dont have a 7950GX2 yet, but if someone is willing to build a sample, I will try to buy it soon to give exact measurements of everything
http://img517.imageshack.us/img517/1...mblock48jc.jpg
Yeah, that looks pretty restrictive, and that better not be aluminum :nono:Quote:
Originally Posted by Got Chow
It has a lot of 90 degree turns, too.
I was wondering why people are not verry interrested about this thread? Ive seen people in other threads that want a better cooling solution for their 7950GX2, but non have shown up to keep this thread alive :confused:Quote:
In case anybody was interested...
Im posting new design and everything to see if people are inspired to try building the block or supporting with new ideas... guess not. :rolleyes:
Can you send me CAD files so I can take a peek at them? In about 2 months I can have a fully functional CNC mill.
My buddy runs a CNC shop and I could have a couple made. However, he will charge for the CAD stuff. If anybody can get ma a CAD file of a prototype, I'll see about having a couple samples made...
Can you post a layout pic of that card here, I'll be able to make a block with 3d's max.Quote:
Originally Posted by Burn