I've been testing the HD 4670 for today's launch but have not been able to extract more than (very close to) 16 textures per clock with any fillrate-meter I know and have at my disposal. That includes the 3DMarks' obviously, but also Rightmark 3D, Archmark and various in-house tools.
On page two, I've described this.
http://www.pcgameshardware.com/aid,659355/Reviews/PCGH_Review_Radeon_HD_4670_and_HD_4650/
Did any of you have more luck wrt to this? I've already talked to AMD and they have some in-house tools (which they would not disclose for obvious reasons) which were able to do just that.
Now, I wonder, if it's that difficult to extract more than 16 tex/clk - how would the chip be able to profit from it and thus justify their tribute in die-size?
edit:
FWIW: I can rule out pure bandwidth limitation - even with the core down to 500 and the memory (which suffices for about 15.9 GTex/sec in normal operation) up to 1.050 MHz, I'm only getting (very close to) the theoretical peak of 16 TMUs @500 MHz.
edit 2:
I've done some rightmarking, especially those test, which were enormously improved on with RV770 vs. RV670. Here's two of them: RV730 scores are almost (too exactly) 40% of RV770s which would also be the case if it really had only 16 TUs instead of [strike]32[/strike] 40.
On page two, I've described this.
http://www.pcgameshardware.com/aid,659355/Reviews/PCGH_Review_Radeon_HD_4670_and_HD_4650/
Did any of you have more luck wrt to this? I've already talked to AMD and they have some in-house tools (which they would not disclose for obvious reasons) which were able to do just that.
Now, I wonder, if it's that difficult to extract more than 16 tex/clk - how would the chip be able to profit from it and thus justify their tribute in die-size?
edit:
FWIW: I can rule out pure bandwidth limitation - even with the core down to 500 and the memory (which suffices for about 15.9 GTex/sec in normal operation) up to 1.050 MHz, I'm only getting (very close to) the theoretical peak of 16 TMUs @500 MHz.
edit 2:
I've done some rightmarking, especially those test, which were enormously improved on with RV770 vs. RV670. Here's two of them: RV730 scores are almost (too exactly) 40% of RV770s which would also be the case if it really had only 16 TUs instead of [strike]32[/strike] 40.
Code:
HD 4870 HD 4670 HD3870
D3D Rightmark 1.0.5.0 - Proc. Fur (PS3.0)
- 1600x1200 55,41 23,96 15,21
- 1920x1200 45,42 20,07 12,47
- 2560x1600 24,72 10,87 6,74
D3D Rightmark 1.0.5.0 - Light. St. Par. Mapp. (PS3.0)
- 1600x1200 150,48 59,81 38,73
- 1920x1200 127,91 50,54 32,41
- 2560x1600 76,19 29,96 19,45
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