ATI-AMD's R600 GPU has a 512-bit external bus and 1024-bit internal ring bus


A

AirRaid

http://www.xbitlabs.com/news/video/display/20061125030945.html


http://www.theinquirer.net/default.aspx?article=35707


http://www.xbitlabs.com/images/news/2006-11/ati_r600_chip2.jpg


the R600 is a progression from the Xbox 360's 'Xenos' GPU, without
EDRAM, but with a 512-bit external memory bus. this beats out Nvidia's
high-end G80 which only has a "384-bit" bus, which I believe is
actually just a 256-bit plus a 128-bit busses in different regions of
the GPU/card.

R600 should definitally have the bandwidth advantage over G80.


I am hoping that the next Xbox makes the leap from a 128-bit main
memory bus (Xbox, Xbox 360) to a 512-bit bus. Xbox 360 can get away
with a 128-bit main memory bus because it has super high bandwidth
EDRAM at 256 GB/sec internally, which is probably higher than the
bandwidth that even R600 will have. but Xbox 360's 256 GB/sec is only
for 10 MB of RAM.

but it's good to see ATI-AMD and Microsoft ahead of Nvidia and Sony.
 
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J

John Lewis

http://www.xbitlabs.com/news/video/display/20061125030945.html


http://www.theinquirer.net/default.aspx?article=35707


http://www.xbitlabs.com/images/news/2006-11/ati_r600_chip2.jpg


the R600 is a progression from the Xbox 360's 'Xenos' GPU, without
EDRAM, but with a 512-bit external memory bus. this beats out Nvidia's
high-end G80 which only has a "384-bit" bus, which I believe is
actually just a 256-bit plus a 128-bit busses in different regions of
the GPU/card.

R600 should definitally have the bandwidth advantage over G80.

er, did you read the Anandtech article on the 8800 GPU before firmly
placing you foot in your mouth and pushing hard ? You betray your
total lack of technical knowledge and your total ability to
regurgitate phrases typically seen on the glossy boxes of retail video
cards. Why not offer your services to ATi (AMD) marketing ? Maybe you
could also finally encourage them to cease their endless new product
paper-releases.

John Lewis
 
F

Furious-3

Interesting topic...

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A

AirRaid Mach 2.5

John Lewis wrote:
..
er, did you read the Anandtech article on the 8800 GPU before firmly
placing you foot in your mouth and pushing hard ? You betray your
total lack of technical knowledge and your total ability to
regurgitate phrases typically seen on the glossy boxes of retail video
cards. Why not offer your services to ATi (AMD) marketing ? Maybe you
could also finally encourage them to cease their endless new product
paper-releases.

John Lewis


this info does not come from the glossy boxes of retail video cards or
ATI marketing. ATI / AMD has not released official info on the R600.
the 512-bit bus info comes from websites that track new graphics cards
/ GPUs. it's also pretty much excepted on Beyond3D.com forums, where
the hype is seperated from the BS. 512-bit bus can only be a good
thing. unless you're a Nvidiot.
 
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A

AirRaid Mach 2.5

more:

http://www.bit-tech.net/news/2006/11/27/first_r600_pictures/

"R600 is the first GPU that ATI will release under AMD's cloak, and
will be the company's first DirectX 10 compliant graphics processor.

manufactured on TSMC's 80 nanometre process and according to PCDVD
Forums, the chip's surface area is just under 430mm² - that's
considerably larger than the company's current high end R580 GPU.

Interestingly, the silicon in the leaked pictures has been rotated by
45 degrees. We believe that this has been done in order to incorporate
a physical 512-bit memory interface with realistic trace lengths.
NVIDIA's first 256-bit dies (NV35 onwards) were rotated by 45 degrees
on the chip packaging, so it could be a case of history repeating
itself again.

NVIDIA's GeForce 8800 GTX video card uses a 384-bit memory interface,
while the GeForce 8800 GTS uses a 320-bit memory interface. However,
the orientation of the G80 die on its packaging is not clear at this
time, because it's hidden under a rather large heat spreader. I'm not
prepared to use one of bit-tech's GeForce 8800's as a guinea pig just
yet...

AMD is rumoured to unveil its next-generation graphics processor on the
20th January 2007."
 

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