Thursday, March 21st 2013

AMD Radeon HD 7790 Physical Specifications, Release Date Confirmed

A presentation slide, allegedly by AMD, leaked by a Japanese distributor confirmed specifications of AMD's upcoming Radeon HD 7790 graphics card. According to the slide, the HD 7790 is indeed based on a brand new silicon, with a transistor count of 2.08 billion. Compare that, to the 1.5 billion TC of "Cape Verde," and 2.80 billion of "Pitcairn." The silicon is built on the 28 nanometer silicon fab process.

The clock speed mentioned in the slide could be core, which is clocked at 1.00 GHz. Next up is the stream processor count, which stands at 896. The HD 7790 is mentioned to feature a primitive rate of 2 prim/clk, suggesting that its component hierarchy is more similar to "Tahiti" than "Cape Verde," which could mean double the tessellation processing power. All said and done, the HD 7790 belts out 1.79 TFLOPs of floating-point performance. The source goes on to mention in its text that the card features a 128-bit wide memory interface, memory clock speed of 6.00 GHz (96 GB/s), a TDP of 85W, and a single 6-pin PCIe power connector. It is expected to launch no later than tomorrow (22/03).

Source: Hermitage Akihabara
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22 Comments on AMD Radeon HD 7790 Physical Specifications, Release Date Confirmed

#1
TRWOV
Great, just after I bought 2 7770s for WCG :mad:
Posted on Reply
#2
sergionography
interesting, this could very much be the gpu in the xbox next(assuming they dont use an apu)
otherwise i dont see why they would use a tahiti like setup, unless they tuned it to get the benefits without losing out on gaming efficiency for a next get part, but this time around instead of rebadging, u get new setups under the same naming

another thing to note this very interesting considering it might be aimed as a next gen parts as amd has always aimed for a 1/3 2/3 3/3 configuration on gpus when possible especialy when on the same node and same architecture, since vliw5 and vliw4 it hasnt work out much cuz it was a bit of a mess
but with gcn they did so with 640 - 1280- 2048(slightly off but almost 3/3)
and if this is 896 then thats 1/3 of 1792 for the so called 8870, and with a 3/3 config u get 2688 which could be on the drawing board at amd to target titan
also with this being 85w tdp its rated almost similar to h7750 and 15w lower than 7770. so that being said it seems amd has tuned gcn while delivering better compute with a 2prim/clock configuration!


so to start with some speculations

hd 8970 - 2688 tenerife? ----225w
hd 8950 - 2304 -------------200w
hd 8870 - 1798 hainan?-------175w
hd 8850 - 1536---------------150w
hd 8830 - 1440---------------125w
hd 8770 - 896 bonaire--------85w
hd 8750 - 768-----------------50w-75w
below - 384-------------------10-50w
Posted on Reply
#3
Delta6326
Sounds good to me. I was hopping for a bigger memory bus, but we will see in W1zz review.

At first I thought it said 79 TFLOPS because on the TPU APP the zoom button don't go away and it blocked the "1." 79 lol. Those keep blocking many things.
Posted on Reply
#4
Xzibit
by: sergionography
so that being said it seems amd has tuned gcn while delivering better compute with a 2prim/clock configuration!


so to start with some speculations
It was foretold..



Figure out if its Bonaire Pro or XT first.. :p
Posted on Reply
#5
sergionography
by: Xzibit
Figure out if its Bonaire Pro or XT first.. :p
LOL well with the way amd marketing is going on the cpu side then expect something along the likes of
TENIRIFE ELITE COMPUTE AND GRAPHICS
HAINAN NO COMPROMISE PERFORMANCE
BONAIRE GAMER PRO

especialy with hd9000 being the last gen with hdxxxx marketing unless they go OVER 9000
Posted on Reply
#6
The Von Matrices
I do not understood the reasoning to create new cards to fill minor price gaps like this one, especially since this price gap has existed for nearly a year already. Is there really a horde of people waiting to buy a card whose only defining characteristic is that it's more powerful than a 7770 but less than a 7850? I would think that they already either bought a 7770 or saved their money for a little while longer and got a 7850. If the 7790 used less power than either of the currently available cards or had other unique features (e.g. new video formats for hardware decoding, additional display outputs), then I could see its purpose, but I fail to see why anyone would have waited to buy this card over any of the already available alternatives.
Posted on Reply
#7
sergionography
by: The Von Matrices
I do not understood the reasoning to create new cards to fill minor price gaps like this one, especially since this price gap has existed for nearly a year already. Is there really a horde of people waiting to buy a card whose only defining characteristic is that it's more powerful than a 7770 but less than a 7850? I would think that they already either bought a 7770 or saved their money for a little while longer and got a 7850. If the 7790 used less power than either of the currently available cards or had other unique features (e.g. new video formats for hardware decoding, additional display outputs), then I could see its purpose, but I fail to see why anyone would come out to buy this card over any of the already available alternatives.
its rated tdp is at 85w which is below hd7770 which is 100w
and about the same as hd7750
and does 2prim/clock similar to tahiti configuration
so while pitcairn and cape verde had more gaming efficient cores because they didnt have the compute muscle activated, this has that and is more efficient than both cape verde and pitcairn and tahiti offcourse
in other words it is an enhancement to the gcn architecture


edit: also hd 7850 is rated at 1.76gflops, so this tops it off with half the tdp
so performance should be something we are familiar with, but if you read between the lines its very much a next gen part
Posted on Reply
#8
Xzibit
by: sergionography
its rated tdp is at 85w which is below hd7770 which is 100w
and about the same as hd7750
Its bugging me :p

7770 = 80W
7750 = 55W
Posted on Reply
#9
HammerON
The Watchful Moderator
These look like they will be nice crunchers (Boinc):toast:
Posted on Reply
#10
hardcore_gamer
The computing performance of 1.79 TFLOPS is very close the performance of the PS4 GPU (1.84TFLOPS). This card is also very efficient compared to the current gen cards. I think AMD made a small modification to it's next gen console GPU to create this card.
Posted on Reply
#11
Xzibit
by: hardcore_gamer
The computing performance of 1.79 TFLOPS is very close the performance of the PS4 GPU (1.84TFLOPS). This card is also very efficient compared to the current gen cards. I think AMD made a small modification to it's next gen console GPU to create this card.
These were already in the pipeline and probably desingned in parallel with the PS4 APU.


AMD to adopt 28nm Bulk CMOS manufacturing process for products in 2013
As for GPU manufacturing, AMD does not plan to make any changes. The current Southern Islands series already adopt Taiwan Semiconductor Manufacturing Company's (TSMC's) 28nm process, while its upcoming Sea Islands series will continue to adopt the same process. The Sea Islands series GPUs have already entered tape-out and should start manufacturing at the end of 2012 and will be announced in the first quarter of 2013.
Posted on Reply
#12
sergionography
by: Xzibit
Its bugging me :p

7770 = 80W
7750 = 55W
thanks for the correction you are right i just checked a few reviews
though I could swear i googled the stuff right before i wrote my first comment and now i cant even remember were i got the 100w from lol
DARN THE INTERWEBZ!

edit: wait wait I found it
http://www.anandtech.com/show/5541/amd-radeon-hd-7750-radeon-hd-7770-ghz-edition-review

100w is the powertune limit


by: hardcore_gamer
The computing performance of 1.79 TFLOPS is very close the performance of the PS4 GPU (1.84TFLOPS). This card is also very efficient compared to the current gen cards. I think AMD made a small modification to it's next gen console GPU to create this card.
but the ps4 has 18 gcn compute units which total 1152cores, but they are rated at the same flops because they are clocked lower to get better performance/watt which allows tdp room for the cpus, so whatever it is im sure its an engineering decision that was well thought out of

ive heard rumors that the xbox was using a chip with 896gcn cores, so im suspicious about this being a xbox next chip rather than a ps4, also with the success of xbox 360 i dont know if microsoft would go the way of sony and do x86 and pretty much kill backwards compatibility. so if they use a powerpc cpu on a seperate chip this could be the gpu on board
Posted on Reply
#13
Norton
WCG-TPU Team Captain
by: HammerON
These look like they will be nice crunchers (Boinc):toast:
+1 ....very interested in their crunching capability :toast:
Posted on Reply
#14
Prima.Vera
by: sergionography
interesting, this could very much be the gpu in the Xbox next(assuming they dont use an apu)
I am thinking the same thing....:ohwell:
Posted on Reply
#15
The Quim Reaper
I do believe we're looking at the PC version of the next Xbox GPU with this new card.

Or rather, it's actual level of performance, if not exactly the same silicon design.

1.79 vs 1.84, it's too close to be a coincidence.

..and here in the UK, Overclockers, AMD's biggest UK retail partner, are currently trying to clear out stock of their 7770 range by reducing them to £99.99 (from £120), so no prizes for guessing these new cards will be occupying that price point.
Posted on Reply
#16
Ronnyv1
by: The Von Matrices
but I fail to see why anyone would have waited to buy this card over any of the already available alternatives.
I live way deep in south america so shipping a 180$ 7850 is way more expensive than shipping a cheaper 7750/7770 and if this thing does 1080p decently like the 7850 then its aimed at me :3
Posted on Reply
#17
fynxer
by: TRWOV
Great, just after I bought 2 7770s for WCG :mad:
Hmmm, how could you have missed the news about 7790. It's been on all news sites for well over a month that a release was scheduled for end of march.

In what time frame is "just bought", a week ago or 6 months ago.

If you bought your 7770 a few months ago then it's nothing to cry about, sell your 7770 quick and do a small loss now and get an nice upgrade i the process.

Read tomorrows reviews and check what AMD card give most bang for your buck. For example, some 78xx cards sell very cheap at the moment...
Posted on Reply
#18
Delta6326
I'm gonna take a guesstimate and say it will be about 5% slower than a 7850. if this was to be the xbox gpu I wonder how Ports will be on it.
Posted on Reply
#19
DarkOCean
by: Delta6326
I'm gonna take a guesstimate and say it will be about 5% slower than a 7850. if this was to be the xbox gpu I wonder how Ports will be on it.
It will be slower than that 7790 has 40% less bandwidth and only 16 rops while 7850 has alot more oc potential having only 860mhz base core clock and alot of bandwidth.
Even the preliminary tests(only 3dmarks) from sweclockers showed a factory overclocked 7790 (1075/6400 vs 1000/6000) being ~10% slower than a stock clocked 7850... bottom line i'm expecting stock clocked cards to be ~15% slower than stock 7850's (about stock gtx560ti performance).
Posted on Reply
#20
Xzibit
I need to see more to get excited...

Whats is impressive if true is the quick turn-around if its GCN 2.0.

I'm more interested to know if its Bonaire Pro or XT. That will set the stage for what we can expect for the rest of the line-up.
Gentlemen, you had my curiosity. But now you have my attention.
-Calvin Candie
:)

by: DarkOCean
It will be slower than that 7790 has 40% less bandwidth and only 16 rops while 7850 has alot more oc potential having only 860mhz base core clock and alot of bandwidth.
Even the preliminary tests(only 3dmarks) from sweclockers showed a factory overclocked 7790 (1075/6400 vs 1000/6000) being ~10% slower than a stock clocked 7850... bottom line i'm expecting stock clocked cards to be ~15% slower than stock 7850's (about stock gtx560ti performance).
The information (specs) on those leaks still dont match up..

Here are the benchmarks I asume your were refering to.





If the 7790 follows how GCN is in OC. 1075 is just a AIB icing to intise customers. Even if base is at 1000. Reference you'll probably get to 1140 before it needs outside adjustment other then those provided by AMD OverDrive.
Posted on Reply
#21
[XC] Oj101
The card will feature 1 GB of memory.



;)
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