Monday, March 11th 2013

AMD Radeon HD 7790 "Bonaire" Detailed Some More

AMD appears to have a gaping hole in its product stack, between the ~$110 Radeon HD 7770 and ~$170 Radeon HD 7850 1GB, which needs filling. NVIDIA's ~$150 GeForce GTX 650 Ti appears to be getting cozy in that gap. AMD plans to address this $110~$170 gap not by lowering price of the HD 7850 1GB, but by introducing an entirely new SKU. Since production cost on the 2.8 billion-transistor "Pitcairn" silicon is high, and since the HD 7770 maxes out feature-set of the "Cape Verde" silicon, AMD is left with only one option, to create an entirely new ASIC, which has been codenamed "Bonaire."

According to a Hardware.info report, the first SKU based on this silicon will be named Radeon HD 7790. The chip is said to pack 896 stream processors based on the Graphics CoreNext micro-architecture. It will be equipped to perform roughly 10 percent slower than the Radeon HD 7850, which should make it highly competitive with the GeForce GTX 650 Ti, giving AMD room for further price-tweaking. Bonaire could contribute to low production cost probably by a leaner transistor count, a narrower memory bus than Pitcairn (resulting in lower number of memory chips on the card), and allowing for a more cost-effective VRM. The HD 7790 is expected to be launched in April.

Source: Hardware.info
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62 Comments on AMD Radeon HD 7790 "Bonaire" Detailed Some More

#1
itsakjt
How will this be as an upgrade to my overclocked 6770? (See specs)
Posted on Reply
#2
NeoXF
by: itsakjt
How will this be as an upgrade to my overclocked 6770? (See specs)
Should more or less, be at HD 6950 levels of performance... So... go from there...
Posted on Reply
#3
itsakjt
by: NeoXF
Should more or less, be at HD 6950 levels of performance... So... go from there...
Ahh that will be great for me. :)
Posted on Reply
#4
Novaguy
I see them getting rid of the 7850 1gb and sliding in the Bonaire into the 650 Ti price, maybe slightly cheaper, and then the 7850 2gb can slide down in price a little as the next round of price cuts take effect.

I also don't think the 7790 will have 896 units, it most likely would have 768 shader units. Shades of what AMD did between the 5000 series and the 6000 series (5670 had 400 shaders, 6670 had 480, etc) - just add another increment of shaders as the process technology at 28nm gets better.

I remember seeing rumors of a 768 shader radeon 8770, with 128 bit, maybe 192 bit memory, and suspect that the 7790 is the new name. This way they can just test out the drivers for GCN 2.0's without too much bad press as to their halo product having bad fps, and then when the GCN 2.0 drivers are optimized bring out the 8000 series in late 2013/early 2014.
Posted on Reply
#5
Xzibit
by: Novaguy

I remember seeing rumors of a 768 shader radeon 8770, with 128 bit, maybe 192 bit memory, and suspect that the 7790 is the new name. This way they can just test out the drivers for GCN 2.0's without too much bad press as to their halo product having bad fps, and then when the GCN 2.0 drivers are optimized bring out the 8000 series in late 2013/early 2014.
Rumors

Bonaire Pro = 640 VS / 40 TC / 16 ROPs / 128-bit / ?GB
Bonaire XT = 768 VS / 48 TC / 16 ROPs / 128-bit / ?GB

Hainan LE = 1024 VS / 64 TC / 32 ROPs / 256-bit / ?GB
Hainan Pro = 1536 VS / 96 TC / 32 ROPs / 256-bit / ?GB
Hainan XT = 1792 VS / 112 TC / 32 ROPs / 256-bit / ?GB

Venus LE = 2048 VS / 128 TC / 32 ROPs / 384-bit / ?GB
Venus Pro = 2304 VS / 144 TC / 48 ROPs / 384-bit / 3GB
Venus XT = 2560 VS / 160 TC / 48 ROPs / 384-bit / 3GB
Venus XTX = 2560 VS / 160 TC / 48 ROPs / 384-bit (x2) / 6GB
Posted on Reply
#6
T4C Fantasy
CPU & GPU DB Maintainer
by: Xzibit
Rumors

Bonaire Pro = 640 VS / 40 TC / 16 ROPs / 128-bit / ?GB
Bonaire XT = 768 VS / 48 TC / 16 ROPs / 128-bit / ?GB

Hainan LE = 1024 VS / 64 TC / 32 ROPs / 256-bit / ?GB
Hainan Pro = 1536 VS / 96 TC / 32 ROPs / 256-bit / ?GB
Hainan XT = 1792 VS / 112 TC / 32 ROPs / 256-bit / ?GB

Venus LE = 2048 VS / 128 TC / 32 ROPs / 384-bit / ?GB
Venus Pro = 2304 VS / 144 TC / 48 ROPs / 384-bit / 3GB
Venus XT = 2560 VS / 160 TC / 48 ROPs / 384-bit / 3GB
Venus XTX = 2560 VS / 160 TC / 48 ROPs / 384-bit (x2) / 6GB
venus is mobile only and I doubt there will be a mobile part with 2.5k shaders
Posted on Reply
#7
itsakjt
I think the 7790 will be 192 bit or 256 bit as the 6790 itself was 256 bit.
Posted on Reply
#8
Xzibit
by: T4C Fantasy
venus is mobile only and I doubt there will be a mobile part with 2.5k shaders
Just put those up since they been floating around for a few months.

If it ends up being Bonaire. The other two names are mostly likely to be Aruba & Curacao. Named after the Dutch Caribbean ABC Islands
or
Caribbean Netherlands BES Islands
Bonaire, Sin Eustatius, Saba
Posted on Reply
#9
Casecutter
A) The 6790 was on a gleded "Barts", so is why it had 256-Bit.

B) Show me another AMD/ATI that has used 192-Bit?

C) 768Sp is 20% over the 640 of Cape Verde, 896Sp would 40%; while 896Sp part would be ~12% less the 7850 1024Sp of the 7850 Pitcairn. Consider there's about a 50% difference in perfromance from 640/1024 (plus over 100% memory bandwidth) I'm leaning to the 896Sp part while holding to a ~90 Gb/s memory bandwidth on 128-Bit. That might be what they need to be as they said close to a 7850, along with the 7770 more than 25% behind a GTX650Ti I think a 896Sp part will be. Unless the GNC2 has more bang in each shader.
Posted on Reply
#10
AlienIsGOD
From Tom's a few mins ago: http://www.tomshardware.com/news/AMD-Radeon-7790-Saturn-GPU,21447.html

from the article "The HD 7790 will feature 786 shader processors instead of the previously indicated 896, a clock rate of 1075 MHz and 2 GB of GDDR5 memory over a 128-bit interface and support DirectX 11.1 and OpenGL 4.3."

also "According to a now redacted result posted on CL benchmark's website, the HD 7790 can be expected to provide 10 percent lower performance than a HD 7850."

Finally "The Radeon HD 7790 has a recommended price of £118 and will be available in April 2013."
Posted on Reply
#11
DarkOCean
"Interestingly, the HD 7790 is actually based on the 22 nm Bonnaire XT chip and uses the GNC 2.0 "
Awesome if it's true.
Posted on Reply
#12
Xzibit
If infact its a 22nm I think you can expect a 20-25% performance increase.

Hmm..
New Tahiti and GK104 will be nipping at TITAN for less then half the price.
Posted on Reply
#13
DarkOCean
by: Xzibit
If infact its a 22nm I think you can expect a 20-25% performance increase.

Hmm..
New Tahiti and GK104 will be nipping at TITAN for less then half the price.
what new tahiti?
Posted on Reply
#14
btarunr
Editor & Senior Moderator
by: AlienIsGOD
From Tom's a few mins ago: http://www.tomshardware.com/news/AMD-Radeon-7790-Saturn-GPU,21447.html

from the article "The HD 7790 will feature 786 shader processors instead of the previously indicated 896, a clock rate of 1075 MHz and 2 GB of GDDR5 memory over a 128-bit interface and support DirectX 11.1 and OpenGL 4.3."

also "According to a now redacted result posted on CL benchmark's website, the HD 7790 can be expected to provide 10 percent lower performance than a HD 7850."

Finally "The Radeon HD 7790 has a recommended price of £118 and will be available in April 2013."
AMD has no means of building chips on 22 nm, 786 stream processors is impossible, GNC 2.0 architecture doesn't exist. Besides, that Tom's article cites the same HWI source as me. So Tom's just got things wrong.
Posted on Reply
#15
Melvis
by: Casecutter
Well, if you paid >$140, while intend to play acceptably @1920x into the future that will prove problematic.
I paid $154 AUS Dollars, and when buying this card you don't realy expect it to be for high res monitors. My GTX 650 Ti will be run on a monitor of 1680*1050 at the most.

I was going to go with a 7770 but the card was to long for a mini PC build, when the 650 Ti came out it was more powerful, shorter but a little more expensive but worth it. I cant se this new 7790 to be any shorter then the 7770? and performance i have no idea, so over all the 650 Ti still wins in my eyes for people building a PC with very limited space.
Posted on Reply
#16
Xzibit
by: btarunr
AMD has no means of building chips on 22 nm, 786 stream processors is impossible, GNC 2.0 architecture doesn't exist. Besides, that Tom's article cites the same HWI source as me. So Tom's just got things wrong.
Intel / Global Foundries / Samsung are all producing 22nm.

TSMC was skipping 22nm to go 20nm then it realized it was an expensive move (loosing business while transitioning) and started doing 22nm runs in H2 2012

So all the major players are at 22nm and below.
Posted on Reply
#17
NeoXF
If R7790 is OpenGL 4.3-compliant, that that pretty much makes it confirmed that this is a different architecture than Southern Islands.

Also that Anand articles someone posted is as old as the one I read from another place... that corrected itself in the meanwhile saying it's 896 actually, again.
Posted on Reply
#18
btarunr
Editor & Senior Moderator
by: Xzibit
Intel / Global Foundries / Samsung are all producing 22nm.

TSMC was skipping 22nm to go 20nm then it realized it was an expensive move (loosing business while transitioning) and started doing 22nm runs in H2 2012

So all the major players are at 22nm and below.
TSMC isn't making 22 nm, its foundry processes below 28 nm won't enter mass production before Q4 2013, likewise with Samsung. AMD won't give its precious GPU designs to Intel.
Posted on Reply
#19
Xzibit
(GP)IBM, Samsung, Global Foundries & TSMC, UMC are all doing Low volume production runs of 20nm process. Mass production is slated for 2H 2013

AMD was first to 28nm so might beat Nvidia to 20nm aswell
Posted on Reply
#20
btarunr
Editor & Senior Moderator
by: Xzibit
(GP)IBM, Samsung, Global Foundries & TSMC, UMC are all doing Low volume production runs of 20nm process. Mass production is slated for 2H 2013

AMD was first to 28nm so might beat Nvidia to 20nm aswell
And how does low-volume production help HD 7790, given that HD 7790 is being designed for a highly competitive (high-volume) market segment?
Posted on Reply
#21
james888
Ya, low volume production wont help. Its a 7790 not a amd olympian special edition card.
Posted on Reply
#22
Xzibit
Its all speculation on what 7790 is at the moment .

It just seams silly to me that

by: btarunr
AMD has no means of building chips on 22 nm, 786 stream processors is impossible, GNC 2.0 architecture doesn't exist. Besides, that Tom's article cites the same HWI source as me. So Tom's just got things wrong.
Your speculation on his speculation and citing same source and saying my ediotrial is better than his.
Why not just site the real source instead of linking to a source that links to the source :rolleyes:

SOURCE for both of yours. Heise (German) English Translated

Information is there from the real source your both getting it at. Not to mention the source your linking was a day old linking to a 7 day old article.
The heart of the Radeon HD 7790 is a graphics chip with 896 Bonaire shader cores. It is manufactured in 28-nanometer process and supports DirectX 11.1 and OpenGL 4.3.
More real source linking. Less editorial butchering. ;)
Posted on Reply
#23
Casecutter
by: Melvis
I paid $154 AUS Dollars, and when buying this card you don't realy expect it to be for high res monitors. My GTX 650 Ti will be run on a monitor of 1680*1050 at the most.

I was going to go with a 7770 but the card was to long for a mini PC build, when the 650 Ti came out it was more powerful, shorter but a little more expensive but worth it. I cant se this new 7790 to be any shorter then the 7770? and performance i have no idea, so over all the 650 Ti still wins in my eyes for people building a PC with very limited space.
Didn't intend that to slight you personally, sorry! What Mini chassis where you constructing in?

With the explanation above you've taken into account several of the GTX650Ti good points, while understand it’s limitation. A GTX650Ti are nice cards, low power/heat in a small package, and if like in your case, one of a small group offer several with rear exhaust. All that said Nvidias' pricing is still wacked... and shouldn’t have anyone anteing-up $160 USD especially at this point. But when in the particular circumstances (like your own), its' fitting and with performance to suite, even if it costs in the wallet... you have to go that direction. :rockout:
Posted on Reply
#24
btarunr
Editor & Senior Moderator
by: Xzibit
Your speculation on his speculation and citing same source and saying my ediotrial is better than his.
Why not just site the real source instead of linking to a source that links to the source :rolleyes:
Because TechPowerUp's and HWI's articles are closer to Heise's than Tom's. Unless you're dumb enough to find merit in "786 stream processors, GNC 2.0, and 22 nm" (Tom's editorial butchering).

by: Xzibit
More real source linking. Less editorial butchering. ;)
More commenting on the message, less menstruating on the messenger. ;)
Posted on Reply
#25
itsakjt
by: Casecutter
A) The 6790 was on a gleded "Barts", so is why it had 256-Bit.

B) Show me another AMD/ATI that has used 192-Bit?

C) 768Sp is 20% over the 640 of Cape Verde, 896Sp would 40%; while 896Sp part would be ~12% less the 7850 1024Sp of the 7850 Pitcairn. Consider there's about a 50% difference in perfromance from 640/1024 (plus over 100% memory bandwidth) I'm leaning to the 896Sp part while holding to a ~90 Gb/s memory bandwidth on 128-Bit. That might be what they need to be as they said close to a 7850, along with the 7770 more than 25% behind a GTX650Ti I think a 896Sp part will be. Unless the GNC2 has more bang in each shader.
AMD/ATI never used 192 bit-True. But that does not mean they will never use it. I am pretty much certain that it will not be a 128 bit one. Memory bus width is one of the most important characteristics of a GPU. Increasing clock speed won't just do the job. It is just like increasing the memory frequency of RAM instead of making dual channel. You will be never able to achieve the bandwidth of dual channel memory using single channel unless it is overclocked from say 1600 MHz to 2600 MHz.
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