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Status: not RivaTuner issue, NVIDIA driver's bug, two of 3 memory clock frequency generators are really running at 400MHz
G80 boards use 3 independent memory clock frequency generators (1 generator for each 2 memory channels). When the PC is booting, core/memory clocks are set to much lower clocks comparing to the clocks set in Windows GUI, and at that time BIOS programs all 3 memory generators to 400MHz. When the OS finish loading, driver must switch all 3 generators to target memory clock. 97.02 driver does it properly, 97.28 - doesn't and leaves 2 of 3 memory clock generators running at BIOS defined 400MHz clock.
G80 boards use 3 independent memory clock frequency generators (1 generator for each 2 memory channels). When the PC is booting, core/memory clocks are set to much lower clocks comparing to the clocks set in Windows GUI, and at that time BIOS programs all 3 memory generators to 400MHz. When the OS finish loading, driver must switch all 3 generators to target memory clock. 97.02 driver does it properly, 97.28 - doesn't and leaves 2 of 3 memory clock generators running at BIOS defined 400MHz clock.
So.......yet another MAJOR bug........but just imagine how powerful these cards really are.....to be able to give good performance STILL....with 2/3's of the memory running at slow speeds...
Guru3D
