Funny how both of you have plausible explanations while still being wrong :)
896MB because the card has a 448 bit memory bus (down from 280's 512 bit bus and 1GB mem) - 2MB per bit of bus
now, cores - as this is not a new chip but all GTX's are based on the target of 240 cores per chip design adding an intermediate sku between the 240 core GTX 280 and the 196 core GTX 260 is not really tied to yields but more so to marketing - at 216 cores the new 260 is faster than the old 260 but not fast enough as to challenge the 280.
The texture unit increase is likewise, incremental.
If you are interested how exactly these stack up Anand has a comprehensive article about them.
As a side note: they should have named it the GTX 270 to keep it clear and simple.
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Funny how both of you have plausible explanations while still being wrong :)
896MB because the card has a 448 bit memory bus (down from 280's 512 bit bus and 1GB mem) - 2MB per bit of bus
now, cores - as this is not a new chip but all GTX's are based on the target of 240 cores per chip design adding an intermediate sku between the 240 core GTX 280 and the 196 core GTX 260 is not really tied to yields but more so to marketing - at 216 cores the new 260 is faster than the old 260 but not fast enough as to challenge the 280.
The texture unit increase is likewise, incremental.
If you are interested how exactly these stack up Anand has a comprehensive article about them.
As a side note: they should have named it the GTX 270 to keep it clear and simple.