PCTuning fórum

Rys píše:You'll only be waiting for 2.5 hours.

Random question answering from the thread and notes on things, since I won't have anything for NDA expiry (it's already 2am here, I'm not done, and I have work in the morning sadly):

• FP16 filtering is half speed, and the samplers are limited by available interpolators (only 32 texcoords/clk) when processing INT8 at full speed
• 260mm2, 960M transistors or so
• Huge focus on area efficiency and perf/watt
• Chip was pad limited in the beginning***, so the last couple of SIMDs are value adds that weren't originally planned for. Explains the first point a little bit.
• ROPs are mostly 2x everywhere measured with MSAA and really help the chip go fast. ROP MSAA downfilter this time.
• Seems to be 64KiB L1 per sampler with huge L1 bandwidth, new design
• Finding peak rates everywhere on the chip has been easy. I've seen 1Tflop FP32, full bilinear rates and peak INT8 blend and Z-only writes (64 Zs/clock, yay!)
• GDDR5 is really what lets the chip kick some real ass
• GS perf is up compared to RV670, maybe a new (bigger) coalescing stream out cache there, and more threads in flight
• Colour cache is per ROP, same as R6
• 16KiB per SIMD shared memory + 16KiB global (not the SMX)
• All 800 SPs can do integer, fat one only for specials still. 1 FP32 MAD or 1 FP<->INT or 1 integer op/clock for all
• New caching scheme for the RF I think
• Orlando-led design but very distributed in terms of teams. Scott Hartog led, and he worked on i740 at Intel
• Over 5MiB of SRAM on-chip if you count every pool
• New UVD block with 7.1 over HDMI
• No ring bus MC, new controller nice and efficient due to new ROP design

It's the single most impressive graphics processor (and pairing with a memory technology, nice one Joe!) I've ever seen, when looked at as a whole. I don't say that lightly either, there have been some winning chips over the years.

Deeply impressive and really deserves to get ATI back on the map when it comes to performance 3D graphics. Sorry I won't have anything more filling for arch NDA expiry, go read hardware.fr, Tech Report and Morgoth's pieces if you want more data.

*** ^infinity, that's honestly the best thing ever

Dave Baumann píše:FYI. This is the "96 Shader" chip Orton talked about some time ago. Things change.

no-X píše:

Dave Baumann píše:FYI. This is the "96 Shader" chip Orton talked about some time ago. Things change.

spajdr píše:Mimochodem Thermalright HR-03 GT pasuje na 4870ku

lukas85 píše:

spajdr píše:Mimochodem Thermalright HR-03 GT pasuje na 4870ku

Myslíš že by jí byl schopen uchladit i bez 12cm fanu...?

800SP are all fat.

Robin_CG píše:Ja si musim udelat radost: NVIDIA dostala na prdel jako prase.

Ted jen dostat soucasnou situaci "ATI je nejlepsi uplne ve vsech cenovejch relacich" (4870X2) do povedomi obycejnejch lidi.

beardie píše:

800SP are all fat.

Zaujimave, ze naraz aj pridali tolko SP a este aj rozsirili ich funkcnost, boli pouzite nove kniznice aby to narvali do 260mm^2? (nehovoriac o TMUs)