New rumor about ATI Southern Islands

[jaredpace]

So the 4D shaders rumor might not be true. Maybe they saved the VLIW-4 design for the next gen (what the real NI @ 32nm should have been) codenamed S.I.??

To get the increase in performance, it must be a fully redesigned scheduler and front end. Compartmentalized into RPEs. Maybe this new front end was supposed to go with the 4D shaders on 32nm for the original NI concept. Like SA wrote in April when they had 'codenames mixed up' : "a newly redesigned front-end with a mildly revamped Evergreen shader." That would mean it's really VLIW-5.

Oh well, lookin forward to finding out! Exciting!

[zerazax]

So the 4D shaders rumor might not be true. Maybe they saved the VLIW-4 design for the next gen (what the real NI @ 32nm should have been) codenamed S.I.??

To get the increase in performance, it must be a fully redesigned scheduler and front end. Compartmentalized into RPEs. Maybe this new front end was supposed to go with the 4D shaders on 32nm for the original NI concept. Like SA wrote in April when they had 'codenames mixed up' : "a newly redesigned front-end with a mildly revamped Evergreen shader." That would mean it's really VLIW-5.

Oh well, lookin forward to finding out! Exciting!

Either way, if the 800/960 SP's rumor for Barts is putting it @ 5850/5870 levels.... imagine double that for Cayman or 4x that for Antilles would be like

[Aten-Ra]

Either way, if the 800/960 SP's rumor for Barts is putting it @ 5850/5870 levels.... imagine double that for Cayman or 4x that for Antilles would be like

If BARTS has 960 shaders (4+1) 900MHz, 48 Texture Units and 256bit memory with 32 ROPs it will have 90% HD5850s performance.


If CAYMAN will have 1920 Shaders (4+1) 900MHz, 96 Texture Units and 256bit memory with 48 ROPs then at high resolutions with AA enable will be 10-20% more than HD5870.

All those in DX-9/10 Games, in DX-11 with tessellation enable 6xxx series will be 50% more than 5xxx.

[generics_user]

If BARTS has 960 shaders (4+1) 900MHz, 48 Texture Units and 256bit memory with 32 ROPs it will have 90% HD5850s performance.


If CAYMAN will have 1920 Shaders (4+1) 900MHz, 96 Texture Units and 256bit memory with 48 ROPs then at high resolutions with AA enable will be 10-20% more than HD5870.

All those in DX-9/10 Games, in DX-11 with tessellation enable 6xxx series will be 50% more than 5xxx.

barts has a different shader setup (3+1 or 4+0); performance / shader is supposed to be increased!

[zerazax]

barts has a different shader setup (3+1 or 4+0); performance / shader is supposed to be increased!

Right, the architecture change means you can't directly compare the SP's unit for unit, but it does seem to be much more efficient... and if the tesselation engine is improved, its DX11 performance should really pull ahead of the 5xxx's

[Aten-Ra]

barts has a different shader setup (3+1 or 4+0); performance / shader is supposed to be increased!

Well, I believe they will use the same 5-way VLIW shader architecture (4+1)

[Calmatory]

Well, I believe they will use the same 5-way VLIW shader architecture (4+1)

What makes you think so? ..apart from the fact that 800 SPs don't quite add up. However, if the 4+1->4 transition turns out to be false for Barts, then what differs it from Juniper?

[Aten-Ra]

What makes you think so? ..apart from the fact that 800 SPs don't quite add up. However, if the 4+1->4 transition turns out to be false for Barts, then what differs it from Juniper?

I believe BARTS will be a 12 SIMD x80 (5-way VLIW)

Barts XT = 960 shaders (900MHz) with 48 Texture units and 256 bit memory with 32 ROPs
Barts Pro = 800 shaders (800MHz) with 40 Texture units and 256 bit memory with 16 ROPs

They will replace 5770 and 5750, Barts XT will have 90% performance of 5850 and Barts Pro will be like 5830.

CAYMAN to be a 24 SIMD x80 (5-way VLIW)

Cayman XT = 1920 shaders (900MHz) with 96 Texture units and 256 bit memory with 48 ROPs (not 32)
Cayman Pro = 1760 shaders (750MHz) with 88 Texture units and 256 bit memory with 32 ROPs

They will replace 5870 and 5850, Cayman XT will be 10-20% faster than 5870 at high resolutions with Filters on like 1920x1080 4x AA in DX-9/10 games. 50% more performance in DX-11 games