Radeon HD 7000 Revealed: AMD to Mix GCN with VLIW4 & VLIW5 Architectures

[The|Hunter]

I suggest you do that! Plus get new GPUClock Tool from AMD and check how well/bad your sample is clocking! New 28nm process so a lot to be learnt again

Interesting


Is 7970 capable of around 14k.P by gpu in 3dM11?

[tbone8ty]

Crossfire config is two 7970 ES.
Retail card should be ~210w TDP, 6+1 phase and 8+6pin.

VR-Zone's is a MSI 7950.
384bit and will come in both 1.5gb and 3gb flavors.
TDP is supposedly around 170-180w, 5+1phase and two 6pins.

is it me or does that look really good? wasn't 6970 like 250w TDP?

[Dimitriman]

If that is true then it is indeed not bad and it means dual Tahiti XT may be able to draw just about 300W (I believe 210W is what drew the 5870 correct?), a lot better than 6990.

[LordEC911]

Those TDP numbers could be due to PowerTune's artificial limit but they should be pretty close.

[hurleybird]

I suggest you do that! Plus get new GPUClock Tool from AMD and check how well/bad your sample is clocking! New 28nm process so a lot to be learnt again

There's a new one? where?

[tbone8ty]

the 7950 looks like a sweet card...unlocked to 7970 muahaha lol

[N19h7m4r3]

Crossfire config is two 7970 ES.
Retail card should be ~210w TDP, 6+1 phase and 8+6pin.

VR-Zone's is a MSI 7950.
384bit and will come in both 1.5gb and 3gb flavors.
TDP is supposedly around 170-180w, 5+1phase and two 6pins.

is it me or does that look really good? wasn't 6970 like 250w TDP?

It does look really good!

I think my GTX470 is rated at TDP of 215W, and if the 7970 is around 210 it would amazing card and replacement.

Specially for people like myself with M-ITX systems that still want some pure grunt.

[Olivon]

fellix estimates the chip size around 432,6 mm²



http://forum.beyond3d.com/showpost.p...postcount=1202

[Pantsu]

It's going to be very interesting to see how AMD fares with a big chip and a new architecture once again. At least it's not late, and that's a very good sign!

[GoldenTiger]

Yeah I agree, ATI might have a better hardware model at the moment, but I'm fed up with the instability of their drivers. If the Nvidia product is at a similar performance level and runs at reasonable temps/power consumption I'm going to go with them next round simply because I trust their software guys a lot more

Same here, I've preferred the nVidia drivers for awhile honestly. I'm most excited about HD7000 series just to see it push nVidia's next-gen closer , though the hardware looks great. My SLI setups have worked essentially flawlessly for me since the GTX 2xx series, and nearly flawlessly in the 8800GT era when I had two in SLI for awhile. I'm happy enough with my performance at the moment with GTX 570 SLI to hold out for the 6xx (or whatever it ends up being called) series. I'll see how things pan out from both sides with 28nm.

[AliG]

fellix estimates the chip size around 432,6 mm²



http://forum.beyond3d.com/showpost.p...postcount=1202

wow that's a hell of a big chip! Kudos to getting this thing out on schedule with all the layoffs going on, if anything that's at least re-assuring about its performance

[zalbard]

fellix estimates the chip size around 432,6 mm²

Still not much compared to GF110's die size of 520 mm².
I really hope these cards are going to bring significant performance improvements for gaming, and not just compute and tessellation. Fermi was a big gaming performance leap for Nvidia; however, I don't see this architecture bringing much more for games than some extra processing units (which don't scale that well past Cayman's numbers in the first place).

[Lanek]

Still not much compared to GF110's die size of 520 mm².
I really hope these cards are going to bring significant performance improvements for gaming, and not just compute and tessellation. Fermi was a big gaming performance leap for Nvidia; however, I don't see this architecture bringing much more for games than some extra processing units (which don't scale that well past Cayman's numbers in the first place).

I can be wrong, but i have the feeling the CU arrangement ( 30-32CU made of 4SMID, made of 16 ALU (Vector ) + 1Scalar units ), can bring more efficiency for the processors units. So it's a bit hard to compare with Cayman.. Well we will know it fast enough.

[dasa]

Still not much compared to GF110's die size of 520 mm².

i wonder how that would compare if gf110 was 28nm as well

[mrcmtl]

My rudimentary methods gives me the approximate same die size as Cayman. I'm taking the ratio between the top and bottom corners of the die and the top and bottom line of the square lines on the PCB. The ones that encloses the 4 screw holes. This is of course assuming that the square on both cards are the same which they should be. Cayman's ratio is around 0.485 while Tahiti is around 0.466.

[Cold Fussion]

Still not much compared to GF110's die size of 520 mm².
I really hope these cards are going to bring significant performance improvements for gaming, and not just compute and tessellation. Fermi was a big gaming performance leap for Nvidia; however, I don't see this architecture bringing much more for games than some extra processing units (which don't scale that well past Cayman's numbers in the first place).

This is significantly bigger comparatively since Fermi was on 40nm.

[Lanek]

This is significantly bigger comparatively since Fermi was on 40nm.

Huum, well if 28nm process have exist when the GTX480 and Cypress/cayman have been released, im not sure the die size will have change so much ( maybe a little less for both brands ) . They will have been packed with more SP at this time.

I doubt you hope see a Fermi2 ( GTX6xx ) who come with 480/512SP ( 32SP was disabled, but the die size between a GTX480/512 was the same )in 28nm this year, just for reduce the die size. But at least with more SP...

[tbone8ty]

Amd just announces the Caymen die is actually 697,000 transistors to many. Lol

[tbone8ty]

DCenter compiled specifications of "Tahiti", based on bits and pieces of information from various sources. The specs can be listed out as:
http://translate.google.com/translat...s%2F2011-12-11


4.50 billion transistors, die-area of 380 mm², built on TSMC 28 nm process
Advanced GCN 1D architecture
2048 1D processing cores
128 TMUs, 48 ROPs
384-bit wide GDDR5 memory interface, memory clock slightly below 1 GHz, target bandwidth of 240~264 GB/s

this has been posted before but jsut wanted to update this thread.

this table is close to what has been rumored minus the XDR2 memory looks to be (384-bit gddr5) and i think ROPs, clusters, and TMUs r off a little 2 but im not sure on the math....streaming processors look to be close
7900
HD 7900.PNG

7800
hd7800 series.PNG

(tables are from NordicHardware)

thinking about compiling my own table in excel...

[tbone8ty]

HD7000 series rumors table by Tyler Morrison, on Flickr
updated 12-14-2011 @2:10pm

this is a table i compiled from various sources going around the web...if u see a mistake or what i should edit please let me know and ill update it.

i apologize in advance lol

[LordEC911]

if u see a mistake or what i should edit please let me know and ill update it.

384bit = 48ROPs.
7950 will be 384bit so also 48ROPs.

78x0 is Pitcairn not Thames... also Pitcairn is GCN.
7870 should have a TDP ~150w.
7850 should be ~120-130w and probably just a single 6pin.

Memory clock for 186Gbps on 256bit is 5.8ghz. 166Gbps is 5.2ghz.

Transistor count should be a bit higher on Pitcairn than Cayman, so maybe 3.1-3.2b?
Should also end up slightly bigger than Barts, 270-280mm2.

[tbone8ty]

ok thanks i updated the table...i thought 7870 and 7850 were gonna be VLIW4?

prices ok u think?

[Manicdan]

if there doing nothing by GCN, it better be good and ready

[LordEC911]

ok thanks i updated the table...i thought 7870 and 7850 were gonna be VLIW4?

prices ok u think?

Thames is on 40nm and probably vliw5, a rebranded HD6x00 (can't remember what series off the top of my head).
There is more than one ASIC using GCN.

Prices should be in the neighborhood according to Charlie.

I'm still not 100% sure they will be disabling CUs in less than quads.

[kaktus1907]

ATTENTION: It seems this slide is legit but little bit outdated, GPU clocks and Load TDP are lower! GPU clocks are under 900 MHz and Load TDP +/- 200W.

Gaming performance is far behind expectations, but i told you so before ... enjoy this first REAL leak about Radeons HD 7900 ... by OBR

PS. Thanks Bruno Mur... for slides! Good boy! I will wait for Donanim or any web who leaks something more first, and will leak next slides. Zero Power Feature, Ocing, Tesselation performance, Gaming performance etc. Stay Tuned!

http://www.obr-hardware.com/