The LAST R600 Rumours & Speculation Thread

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So anyone got any clues how you go about getting the stuff to congregate at the hot bit when the hot bit is at the top?
 
Ah duh, I was reading the diagram of the Vapochill where it says
Chamber (filled with gas R134a)
Click to expand...
as "in a Vapochill, there is no liquid puddle to wick" but that wouldn't work so there must be one :oops:

Random goose-chase:
According to the aformentioned wikipedia article, R134a is also known as R600a or more commonly Isobutane.
Which reminded me of the R520 info mis-translation in my sig, Cyclopentadiene which over a few hours turns into Dicyclopentadiene which is a somewhat bigger molecule.
Shades of R520 -> R580 :!:

So guess what Isopropane turns into?
Well I thought I was onto something with n-Butane which I took as an analogue to a multi-GPU R700 but its actually only CH3CH2CH2CH3 which is much more mundane & you actually have to work to turn it into that :???:
 
hoom said:
Ah duh, I was reading the diagram of the Vapochill where it says as "in a Vapochill, there is no liquid puddle to wick" but that wouldn't work so there must be one :oops:

Random goose-chase:
According to the aformentioned wikipedia article, R134a is also known as R600a or more commonly Isobutane.
Which reminded me of the R520 info mis-translation in my sig, Cyclopentadiene which over a few hours turns into Dicyclopentadiene which is a somewhat bigger molecule.
Shades of R520 -> R580 :!:

So guess what Isopropane turns into?
Well I thought I was onto something with n-Butane which I took as an analogue to a multi-GPU R700 but its actually only CH3CH2CH2CH3 which is much more mundane & you actually have to work to turn it into that :???:
Click to expand...

Haha, that exact post is why I love this place. Only at B3D would you find such posts. Wonderful!
 
I have to say, after seeing that link and reading about the Vapochill, I now want one for my CPU. R134a is the same substance used in automobiles now that R12 is is outlawed (except for the "fake" R12 that occasionally burns up the whole system), and they have been converted over.

What an excellent idea. Why has no one thought of it before?

I think that is a great idea for a GPU cooler. I looked in Newegg, but they don't have them. I will be buying one as soon as I can find one for my CPU (yes, I am sold on the idea! )

EDIT: Actually, yes they do now that I looked in a different way. Extremely reasonable price, too. 36.99. Not bad for phase cooling! Vapochill at Newegg Unfortunately it is currently out of stock (my guess is that it hasn't been released yet - ETA is 3/13/2007)
 
hoom said:
Ah duh, I was reading the diagram of the Vapochill where it says as "in a Vapochill, there is no liquid puddle to wick" but that wouldn't work so there must be one :oops:
Click to expand...

AFAIK, there isn't a wick in the Vapochill Micro, which is why it is shaped with an angle between the base and the pipes, and must be rotated so that the top of the heatpipes are physically above the base of the unit. The phase change liquid then evaporates up and drops back down with gravity.

I'm assuming that the lack of a wick makes the unit cheaper, easier to make, and more efficient at cooling, as you don't have to wait for the wick to draw the liquid back. The drawback is of course that you have to have the unit installed in a particular way.

I can't see that this system would work too well in graphics cards which can be installed in at least three different planes depending on your case, so I suspect the R600 cooler may well use wicks.
 
Don't the photographs of the R600 board which have been floating around clearly show that it's a heat-pipe cooler? This whole business is starting to sound like Internet Chinese Whispers to me.
 
nutball said:
Don't the photographs of the R600 board which have been floating around clearly show that it's a heat-pipe cooler? This whole business is starting to sound like Internet Chinese Whispers to me.
Click to expand...
All those pix have shown so far is that the non-retail board we've seen so far uses heatpipes.

The "Vapochill" cooler is rumoured for retail boards, which haven't been shown in any photographs so far (apart from a corner shown on VR-Zone, featuring the PEG1 and PEG2 power connectors, a bit of plastic that appears to be the cooler-shroud and not much else).

Jawed
 
Well OK, my point was this. We've seen pictures of the OEM board, which had heat-pipes. We've now heard that the retail board will have a Vapochill cooler, which in itself turns out to be a glorified heat-pipe. Indeed I read at least one reference which said "vapour chamber" rather than Vapochill. Which sounds like a heat-pipe to me.

Surely the simplest explanation is that both the OEM and retail boards will both use coolers which incorporate heat-pipes, albeit probably in a slightly different configuration, and that the "Vapochill" thing came about through rumours between translated between English and Chinese too many times by Google, and/or propagated by people who don't really know what a heat-pipe is?

As for size, seems to me that that's a function of the chuffing great fan rather than the presence of heat-pipes per se.
 
They post slides that were proved to be fake long time back and slam OCW's table as fake. Thats hilarious. :LOL:
 
Has someone here any idea of what order of magnitude the internal bandwidths on a GPU are? I mean storing shader-programs, texture cache etc.?
 
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