Table of Doom, and specification musingsTrotting out the table of doom.
|Graphics cards||NVIDIA GeForce 9800 GTX+ 512||NVIDIA GeForce 9800 GTX 512||NVIDIA GeForce 9800 GT 512||NVIDIA GeForce 8800 GT 512||NVIDIA GeForce 9600 GT 512||ATI Radeon HD 4850 512MiB||ATI Radeon HD 3850 512||ATI Radeon HD 3870 512|
|Memory clock (effective)||2,200MHz||2,200MHz||1,800MHz||1,800MHz||1,800MHz||2,000MHz||1,656MHz||2,250MHz|
|Memory interface, and size,||256-bit, 512MiB, GDDR3||256-bit, 512MiB, GDDR3||256-bit, 512MiB, GDDR3||256-bit, 512MiB, GDDR3||256-bit, 512MiB, GDDR3||256-bit, 512MiB, GDDR3||256-bit, 512MiB, GDDR3||256-bit, 512MiB, GDDR4|
|Manufacturing process||TSMC, 55nm||TSMC, 65nm||TSMC, 65nm/55nm||TSMC, 65nm||TSMC, 65nm||TSMC, 55nm||TSMC, 55nm||TSMC, 55nm|
|DirectX Shader Model||DX10, 4.0||DX10, 4.0||DX10, 4.0||DX10, 4.0||DX10.0, 4.0||DX10.1, 4.1||DX10.1, 4.1||DX10.1, 4.1|
|Vertex, fragment, geometry shading (shared)||128 FP32 scalar ALUs, MADD dual-issue + MUL (unified)||128 FP32 scalar ALUs, MADD dual-issue + MUL (unified)||112 FP32 scalar ALUs, MADD dual-issue + MUL (unified)||112 FP32 scalar ALUs, MADD dual-issue + MUL (unified)||64 FP32 scalar ALUs, MADD dual-issue + MUL (unified)||800 FP32 scalar ALUs, MADD dual-issue (unified)||320 FP32 scalar ALUs, MADD dual-issue (unified)||320 FP32 scalar ALUs, MADD dual-issue (unified)|
|Data sampling and filtering||64ppc address and 64ppc bilinear INT8/32ppc FP16 filtering, max 16xAF||64ppc address and 64ppc bilinear INT8/32ppc FP16 filtering, max 16xAF||56ppc address and 56ppc bilinear INT8/28ppc FP16 filtering, max 16xAF||56ppc address and 56ppc bilinear INT8/28ppc FP16 filtering, max 16xAF||32ppc address and 32ppc bilinear INT8/16ppc FP16 filtering, max 16xAF||40ppc address and 40ppc bilinear INT8/ 20ppc FP16 filtering, max 16xAF||16ppc address and 16ppc bilinear INT8/FP16 filtering, max 16xAF||16ppc address and 16ppc bilinear INT8/FP16 filtering, max 16xAF|
|Peak fillrate Gpixels/s||11.8||10.8||9.6||9.6||10.4||10||10.656||12.4|
|Peak Gtexel/s (bilinear)||47.2||43.2||33.6||33.6||20.8||25||10.656||12.4|
|Peak Gtexel/s (FP16, bilinear)||23.6||21.6||16.8||16.8||10.4||12.5||10.656||12.4|
|Peak TDP (claimed)||155||155||105?||105||95||110||90||105|
|Power connectors (default clocked)||Two 6-pin||Two 6-pin||6-pin||6-pin||6-pin||6-pin||6-pin||6-pin|
|Multi-GPU||SLI - three-board||SLI - three-board||SLI - two-board||SLI - two-board||SLI - two-board||CrossFire - four-board||CrossFire - four-board||CrossFire - four-board|
|Outputs||2 x dual-link DVI w/HDCP, native HDMI 5.1 (via S/PDIF)||2 x dual-link DVI w/HDCP, HDMI 7.1 (native, on GPU)||2 x dual-link DVI w/HDCP, HDMI 5.1 (native, on GPU)|
|Hardware-assisted video-decoding engine||NVIDIA's PureVideo HD - full H.264 decode and partial VC-1 decode||AMD UVD 2 - full H.264 and VC-1 decode||AMD UVD - full H.264 and VC-1 decode|
|Retail price (default-clocked model)||£139||£129||£???||£89||£89||£110||£69||£89|
ZOTAC introduced a GeForce 8800 GT with Hybrid Power technology
GeForce 9800 GT 512Take a look at our eight-GPU table that takes in GPUs ranging from £69 through to £139 and you'll the see the best from NVIDIA and ATI.
Pay specific attention to the GeForce 9800 GT and GeForce 8800 GT columns: the differences between the two SKUs has been emboldened.
NVIDIA feels eminently comfortable in raising the nomenclature without adding a whole heap to an existing architecture.
Specifically, GeForce 9800 GT will be based on the 55nm manufacturing process that was debuted(for NVIDIA) with the GeForce 9800 GTX+ - a product that is only now coming into retail availability. 55nm production makes the 9-series card cheaper to produce, because TSMC can fit more on to a given-sized wafer. Initial cards, however, remain on GeForce 8800 GT-matching 65nm.
The clockspeeds, sadly, remain exactly the same as the volume-selling 8800 GT, although we expect partners to launch the usual cavalcade of pre-overclocked cards. Stock-clocked performance, then, won't be any different.
Hybrid Power, where, on a compatible chipset that features an IGP, the discrete, wattage-hungry card can be turned off when not in heavy 3D use, saving power and routing video through the IGP instead. Problem is, compatible chipsets are NVIDIA-only affairs.
We know that current 8800 GT stock starts at around the £90 mark, so, presumably, the GeForce 9800 GT will have to be a little cheaper, to take the shine away from the new AMD Radeon HD 4850.
Think of GeForce 9800 GT 512 as just a re-badged GeForce 8800 GT, really - you won't be able to discern the difference.