AMD: R8xx Speculation

[Blazkowicz]

bandwith makes dramatic differences in performance, so that's fine, they can do whatever. I appreciate that the model numbers don't lie.

How many people know that a geforce 9500GT gddr3 is much faster than a GT220 ddr2, and that a GT220 gddr3 is much faster than a 9500GT ddr2?

 

[mczak]

Here's a review of a Juniper CE HD5670: http://www.inpai.com.cn/doc/hard/124320.htm

Based on these numbers (except for Vantage), I'd say a HD5670 name is justified
If I'd have to guess I'd suspect there are only 8 ROPs but there are no fillrate tests (the one from Vantage would be insufficient anyway) to say anything about rops unfortunately (nor is there anything to confirm 640SP as far as I can tell, Vantage Perlin Noise would do but the feature tests weren't run).

 

[Squilliam]

Here's a review of a Juniper CE HD5670: http://www.inpai.com.cn/doc/hard/124320.htm

Based on these numbers (except for Vantage), I'd say a HD5670 name is justified
If I'd have to guess I'd suspect there are only 8 ROPs but there are no fillrate tests (the one from Vantage would be insufficient anyway) to say anything about rops unfortunately (nor is there anything to confirm 640SP as far as I can tell, Vantage Perlin Noise would do but the feature tests weren't run).

Even so, I still don't understand why except perhaps its an extreme salvage part? I.E. A way to use ~100k or so Juniper dies which would have otherwise been scrapped.

 

[no-X]

Here's a review of a Juniper CE HD5670: http://www.inpai.com.cn/doc/hard/124320.htm

Based on these numbers (except for Vantage), I'd say a HD5670 name is justified
If I'd have to guess I'd suspect there are only 8 ROPs but there are no fillrate tests (the one from Vantage would be insufficient anyway) to say anything about rops unfortunately (nor is there anything to confirm 640SP as far as I can tell, Vantage Perlin Noise would do but the feature tests weren't run).

I think 8 ROPs would explain these results. It could be the same BW situation as with HD5830...

 

[eastmen]

Seems decent enough for the price point. Its much better than the 5830 turned out to be

 

[neliz]

11 Million DX11 GPUs shipped.

 

[neliz]

Who said that?!

AMD's Computex presentation.

 

[Alexko]

Wow, they had only sold 6 million of them by mid-April. So they sold 5 million more in about 45 days?!

 

[eastmen]

Wow, they had only sold 6 million of them by mid-April. So they sold 5 million more in about 45 days?!

Oem deals for the lower end cards would be my guess

 

[Bouncing Zabaglione Bros.]

Oem deals for the lower end cards would be my guess

People giving up and moving to the AMD side once the Fermi reviews came in?

 

[CarstenS]

Not necessarily, that kind of volume is only possible on the lower end side of business and for those people it wouldn't have made sense to wait for a 500mm²+ chip's reviews.

 

[fellix]

Sneak peek in the Cypress die:

http://img85.imageshack.us/img85/9031/62673273.jpg
http://img337.imageshack.us/img337/1029/14230493.jpg
http://img201.imageshack.us/img201/9541/96276293.jpg

This is as close, as you can get from a butchered chip.

 

[Lukfi]

This is pre-meditated murder in cold blood!

 

[no-X]

Better photo-equipment could help much...

but it seems there's a central section (red - crossbar?), 4 columns / 10 rows of square blocks (green - SPs?) x2 and some slighly different square block at the end of each row (blue - TMUs?).

 

[Jawed]

I'd say the cores should be interpreted at 90 degrees rotation.

The block of squares on each side of the red area is 5x8. That looks to me like 5x4 x2, with the cores back-to-back. So above the red area there are two sets of 5 cores, making one shader engine of 10 cores. Below the red is the same again.

So that would put the TMUs at the far left and far right.

The red needs to be extended leftwards, I reckon, to match how it is on the right.

 

[fellix]

Well, here is the full video where the snaps are from, available all the way up to 1080p:

http://www.youtube.com/watch?v=yaxcbyO0M-k&feature=player_embedded

The cam is rather shaky, but someone willing could snap better stills.

 

[Man from Atlantis]

picture is taken from 1080p

 

[no-X]

 

[Jawed]

Those pix make me think no-X's original interpretation is correct.

 

[Jawed]

So, about 37% of the die is the shader cores, I reckon (122mm²). Admittedly that's pretty woolly and seems a bit low (e.g. I was thinking it might be 150mm²).