Saturday, November 12th 2011
![AMD](https://tpucdn.com/images/news/amd-v1721205152158.png)
AMD Justifies Using Liquid Chamber Tech On Upcoming 7900-Series Cards
videocardz.com brings us a photo showing the benefits of AMD's new liquid chamber technology over the standard vapour chamber technology used in current heatpipe cooling solutions. There's quite a few benefits, some of which are no drying out, physical robustness and greater reliability. Indeed, can you imagine the disastrous effect on your graphics card of having the cooling system spring a leak during an intense gaming session? Doesn't bear thinking about… Certainly the era of having to replace your graphics card's shrill and inefficient cooler with a high performance aftermarket one are long over, as stock coolers are now generally of very good quality. The liquid chamber system will be used by all AMD's partners who stick to the reference design. Check out the photo for the full info.
54 Comments on AMD Justifies Using Liquid Chamber Tech On Upcoming 7900-Series Cards
Double checking the rop thing my memory could be hazy.
Regarding power consumption have a look at this, bare in mind the 2900xt powerconsumption is total system power consumption where as the 6970 is just the card.
2900xt
6970
And 9800gt systempower consumption as it's included in the 6970s card power draw so you can get a better reference
Hopefully it'll be quiet.
=latent heat & micro convection [may not be subject to gravity at the micro level]?,micro porous coat= theres a clue i think.
Also, this diagram and info may be innnacurate to a degree, due to patents infringements or intellectual property rights violations and that sort of thing, they wouldnt give theyre new idea away just like that would they, else it may be plageurised etc>?
we may never know haha! i bet the diagrams are wrong somehow, or somethings left out, to stop people stealing the idea , they all do that to protect there intellectual property.
perhaps they should combine this WITH heat pipe tech
liquid chamber to bring the heat up off the chip
and heat pipes to spread it out over a larger surface area
And the 2900XT was not like the 3870 as the 3870 was 256bit were as the 2900 was 512bit.
Why is it that 'watercooled' cards (even if you can find one in stock) are considered "enthusiast rarity" and cost way more than just stock card + 3rdparty waterblock ?
Why is there no choice to buy 'cooler-less' card ?
Aargh...
PS: I support good OEM aircooling solutions... But I hate not being given a choice.
By the by anyone know why the TPU review says 16x2 for rops is this in-fact the case? Only asking as it's only really TPU I can find it written as a spec :laugh:
www.youtube.com/watch?v=P3ALwKeSEYs
Power usages are just max of what the card can do and lets face it they don't hit those maxes unless you use BS furmark or alike.
I think the power usages should be done for each game as well but surly take would take much more time. My max system out put for my 775 system was 520w using OCCT but ANY game maxed at 370w. profit ?.. Cheaper ?.. Better for CF ?.. Surly they use these coolers so other companys like XFX Powercooler and such can make a profit from making there own coolers for the cards.. Hence more sales.
I think they are actually doing it as they are trying to keep the same design due
Why do you think the 285 peaks to 200W when the 280 peaks 250W, although the 285 has higher clocks? Because it's 55nm over 65nm. Come on.
Like i have noticed one game which is Tiger Woods 08 played it with the 2900XT, 4890 and 6970 and always taking about the same power usage although performance has gained a fair bit. And always been around 290w-330w max with any of the cards.
www.overclock.net/t/1045231/phaedrus-quickndirty-psu-calculator
Any other is a joke in regards to the values it gives, so I'd take anything a PSU calculator says with a truck of salt. They overexaggerate your needs and advertise 1000W+ units on that site (eXtreme nonsense) for PSU sellers to gain revenue:
www.overclockers.com/forums/showpost.php?p=5725802&postcount=13
Anyway, that's not the topic. What I'm saying is, a lower die size comes in a "smaller" GPU. Bigger GPU = less efficient with higher leakage in theory. That's how manufactoring is improved.
Also, the 285 doesn't have lower volts than the 280. In fact, the 285 was a cheaper to make design that most cards (second rev.) worked around 1.15v, while the 280 functioned around 1v. So that's not how it works.
CPU wattage calc notice the complete and utter lack of die size. This calc is also years and years old now and still correct because this is how wattage of a CPU is calculated. Po = Ps * (Fo/Fs) * (Uo^2/Us^2) is the mathmatical formula for CPU power usage (and in turn GPU) and it will NEVER change. All things equal a larger die is no less efficient. How could it be 1.4B transistors are still 1.4B transistors it does not matter how they get packaged together. You know what I love your comparison here. the 285 is higher voltage its also higher clocked AND CONSUMES MORE POWER.
Comparing two different GPU's is also stupid PWM is different and that alone could drastically change power consumption. Hell look card to card and you see major variations between designs.
The 280 had a higher quality PCB than the 285. It had a Chil controller and so, along with a reference design only. Other hand, 285's were mostly non-ref (second revisio) designs that're cheaper, yes.
However, the 285 has a 185W TDP against the 235W of a 280. So it's a give or take depending on what exactly you're comparing. But one can expect a 285 to pull less power since it was built on a core that worked much cooler with less leakage (powers).
www.hardwarecanucks.com/forum/hardware-canucks-reviews/11655-evga-9800-gtx-512mb-video-card-review-17.html