AMD: R8xx Speculation

RV770 doesn't have fixed DP hardware like GT200, it gets "emulated" and runs at a higher speed comparatively but "non-standard" according to some.

 

Errm...no. 24Hz is one of the supported modes. All DX9 titles as well as all other DX10 titles work fine. It is a Crysis issue with ATI cards. One of the two must fix it. Noone does! Nvidia had the same problem but they fix it. So the work falls to ATI.

Thankfully, fiddling arround with the DTV settings and HDTV support the 24hz went away but i still have underscan and definitely not 60hz but at least it's not 24hz anymore.

Anyway we digress and the guys here have a much more interesting conversation!

I shouldn't mention it at all, but it came out as a complain you know. I paid 450 euros for this card on launch day. All in all i am more happy with it than not but things could be better. I just hope there will be some kind of fix with Win7 and Evergreen series. Maybe even a Crysis DX11 patch from Yerli's side? Who knows!

 

Yes, the 181mm² chip.

Jawed

 

My HD2900XT was €320 (€380 inc VAT) and every faster card after that has been CHEAPER!

 

TechPowerUp has some more sneak-peak shoots of Evergreen card demoed at QuakeCon2009

Head over to this post ...

It looks nice
Red PCB and Black radiator

PS. One shot is focused at air exhaust and it looks like radiator itself is small and aluminum!

 

See the spreadsheet:

http://forum.beyond3d.com/showpost.php?p=1316031&postcount=1252

I have updated the spreadsheet since I originally posted it, so see worksheet "JA02". Note the comment attached to RV740's L2 unit count.

As you can see I have ~9mm² I can't account for in RV740.

If you have any ideas or want to make more precise measurements of units on RV770 - instead of that generic "control, setup, interpolation, tessellation etc" - then feel free! It's worth noting that I included some of the "shiny" border between blocks when measuring the sizes of various units. These shiny areas seem to be just metal routing without any logic, i.e. they are the spaces between blocks of logic or blocks of I/O. Also there's some seemingly dead space in the corners of the die.

Obviously Juniper is a wild guess with scalings that aren't particularly justifiable...

Jawed

 

The red card is a HD4890, the dx11-card has a "sapphire"-blue PCB.

 

Why on earth would they take those "spyshots" from HD4890? I mean, the fuzzysoftoutoffocus spyshots, not the OCing extravaganza pics

 

The pics are mix of AMD QuakeCon2009 OC challenge and DX11 demo.
Obviously DX11 card is on bad quality pics
I'm not sure the PCB is blue for DX11 card, for me it's red, but I'm a man and I can differentiate only CMYK colors (who needs more )

 

Not seen this posted

http://www.legitreviews.com/article/1040/1/

Isn't the performance hit of High Definition Ambient Occlusion kinda high? Doesn't look like it would be really usable in games.

 

Video up:

http://www.pcper.com/comments.php?nid=7640

shows tessellation in action. It's interesting to see that tessellating the stones (not adaptive in any way) produces a considerably higher frame rate (~270fps) than the parallax occlusion mapping version (~70fps). I guess it's the killer dynamic branching in POM...

Jawed

 

You can see some numbers about this on NV slides here: http://developer.nvidia.com/object/siggraph-2008-HBAO.html
Slide 33 and 34.
The key point to take from this however is that using compute shaders for screen space effects is the way to go.

 

HDAO is a different technique as far as I can tell:

http://developer.amd.com/gpu_assets/04HighQualityDirect3D10and10point1AcceleratedTechniques.ppt

which doesn't have a post-process blur - though the blur pass in NVidia's technique is hardly the bottleneck!

The HAWX screenshot shows quite a lot of artefacts from HDAO that I think demonstrate poor IQ - e.g. rear corners of buildings that are "shadowed by air coupled with air shadowing".

Jawed

 

The performance of the tesselation in action is quite a bit better than I was expecting!

 

Sir Eric reckons it's a big change

http://www.fudzilla.com/content/view/15076/1/

Scoundrel, messing with my spreadsheet

Jawed

 

the mm2 have to come from somewhere

 

He said conceptual change, not about change in specs.

For the uninitiated,what was the big change about R600? Targeting the mid range market instead of the high end?

 

really? I thought it was a ring bus?

 

Ring bus, didn't that last only a shrink? (r600->rv670)

 

Wasnt the ring buss there in R520 ?