boxleitnerb
Platinum Member
^ of course you can, that is what all those sites in my link to. They measure the power through the slot AND through the PCIe power cables. It is expensive and difficult to do this, but it can be done.
^ of course you can, that is what all those sites in my link to. They measure the power through the slot AND through the PCIe power cables. It is expensive and difficult to do this, but it can be done.
Why pointless? If we want to know how much power a graphics card uses, we measure the graphics card. Plain and simple. This applies to all measurements that take place in a multi-component system.
Proof? For what? That the GTX780 uses 30-50W less power when Boost 2.0 is kicking in?
there is really no proof for that:
http://www.computerbase.de/artikel/grafikkarten/2013/nvidia-geforce-gtx-780-im-test/9/
http://ht4u.net/reviews/2013/asus_matrix_hd_7970_platinum_im_test/index14.php
http://www.hardware.fr/articles/894-3/consommation-efficacite-energetique.html
And much more prone to errors. I'm sorry, but as an engineer, I like to do things as exact as possible.
Your post fails even harder considering that you cannot buy reference HD7970GE cards on the market and those 3 sites you linked used them.
It's understandable how AMD could reduce the GPU voltage at a similar clock speed OR reduce the GPU voltage with a larger die size but end up with a much lower clock speed (similar to 780 vs. 680). However, what you are proposing is a lot lower voltage than HD7970GE and a much larger die size on the same node with barely a 50mhz reduction in GPU clock I am not sure that can be done with 250W of real world power consumption.
I strongly disagree. 35% more over 7970GE would put it faster than the Titan. If AMD "easily" release such a card (i.e., not difficult), what were they doing since February 2013 when they already knew Titan is dropping? It's obviously not easy at all since it's already near end of June and AMD has no such card in sight.
Also, Bonnaire's die size went up 30% to get that 30% increase in performance, while GPU clock remained at 1Ghz like Cape Verde. 30% increase in die size over 365mm2 is nearly 475mm2, not 420-440mm2.
Given recent leaks I suppose 20nm-GPUs in small doses in Q4/2013 is possible.
Availability of Cypress (40nm) was bad and Tahiti (28nm) was clocked quite conservatively, and yet AMD launched both of them successfully.
If the "HAWAII GL40" entry truly points to 40 CUs for the salvage part, this would make sense:
Tahiti Pro: 28 CUs, 1792 SP
Tahiti XT: 32 CUs, 2048 SP (+15%)
Hawaii Pro: 40 CUs, 2560 SP
Hawaii XT: 48 CUs, 3072 SP (+20%)
With a better front end, Hawaii XT could be about 60% faster than Tahiti XT per clock. I would expect clocks to be quite low (1-1.1 GHz) in the beginning for yield reasons.
Big question is bandwidth. A 512-bit interface is expensive and consumes lots of power. With GDDR5, you can only achieve a 17% higher bandwidth compared to current top cards. How are GDDR6 and HMC coming?
Hm, but what about risk production?
Good point. 40nm volume production startet in November 2008, Cypress launched in September 2009. Though that seemed a bit late, but 40nm had problems iirc.
But...from October 24th 2011 to January 9th 2012 it's less than 3 months. The earning call was from Q1 which is over by now. For a 20nm launch in September/October, mass production should start in June/July at the latest. Which is still possible I guess.
But is also was nothing more than a "test chip", small and relatively easy to manufacture. We're talking about a supposed Tahiti successor here with 350mm2 die size and 6-7 billion transistors.
Good point. 40nm volume production startet in November 2008, Cypress launched in September 2009. Though that seemed a bit late, but 40nm had problems iirc.
But...from October 24th 2011 to January 9th 2012 it's less than 3 months. The earning call was from Q1 which is over by now. For a 20nm launch in September/October, mass production should start in June/July at the latest. Which is still possible I guess.
please did you even read the TSMC Q1 2013 earnings excerpt. it said 20nm volume production in Q2 2014. so products can be expected in June or July 2014 at the earliest. and you are saying 20nm products in Sep 2013 is possible 😱
They didn't really clarify, because the question was about 1-3% volume. It depends on what you mean by volume production. For a limited Hawaii launch in Q4 2013, even less than 1% volume might be ok.
And don't forget - we don't know what percentage of those 1-3% actually go to AMD on 20nm and how that number was for 28nm. There are other companies, too, which makes estimates based on this difficult if not impossible.
While TSMC has four "flavors" of its 28nm process, there is one 20nm process, 20SoC. "20nm planar HKMG [high-k metal gate] technology has already passed risk production with a very high yield and we are preparing for a very steep ramp in two GIGAFABsTM," Sun said.
Nope, GPU mining is all but dead and next gen consoles and their respective games are not out yet.
Unless something dramatic happens, I'll probably wait for DX12. Assuming of course AMD is fixing their drivers, and given the total lack of any real improvements over the last 4-5 months I sure hope that is the case. :thumbsup:
Are you serious??? http://www.youtube.com/watch?v=3gB9-eIPLzM with latest drivers, even the R7950 outperforms the GTX680... no improvement over the last months, right...