It is likely that the extra RAM and onboard memory bandwidth boost in this generation of TurboCache parts is there to enable the use of memory intensive HDR features (like the FP16 blend absent from 6200 parts). The 128MB version of the 7300 will have a 64-bit memory bus, which is actually on the high end for TurboCache parts. The bandwidth gained through TurboCache augments the bandwidth of onboard memory and should provide some good speed advantages for low end parts. In addition to allowing programs that require more graphics memory to run efficiently, NVIDIA is also able to cut the bandwidth to graphics memory down without taking a large performance hit. Likewise, the 256MB version of the 7300 will look like it has a 512MB framebuffer to software. With the GeForce 7300 sporting 128MB of RAM, TurboCache allows games to treat the graphics subsystem like it has 256MB of RAM. This allows NVIDIA to "support" games that require more RAM than is physically present on the card. With relatively few vertex shaders, pixel shaders, and render outputs, a little die area can afford to be spent on beefing up caches to allow for the efficient use of higher latency system memory. ATI has been pretty aggressive recently, but the 80nm process should be a fairly simple transition (as far as fabrication process transitions go), so it could go either way.Īside from transistors with 90nm gate lengths and FP16 framebuffer blending, the 7300 will also carry NVIDIA's TurboCache technology. With TSMC bringing out their 80nm process and NVIDIA just now starting to manufacture 90nm parts, it will be interesting to see who takes the next step towards smaller transistors. Sticking with the 110nm process proved to be a good decision for NVIDIA this time around.
#256mb nvidia geforce go 7300 series#
In order to come out with the 7800 series as early as they did, NVIDIA didn't want to try anything tricky like pushing the process envelope and moving to 90nm. As the title of the article implies, the GeForce 7300 is NVIDIA's very first shipping 90nm part.
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