Experienced low framerates on battery too, I guess the BIOS setting that deals with power saving needs to be changed to High-performance mode. Otherwise all the games I tried run very smoothly, even in native res 1680x1050.
Another important finding: some games, especially older ones, don't work very well with the Intel Speedstep technology, and you can exprience hick-ups here and there. To fix that, change the power management scheme from "Portable/Laptop" to "Always on". In that case, the CPU frequency won't vary anymore. You can double-check with any utility that will report the CPU speed.
These two advices impact battery life, so keep track of what you're doing if you need to maximize battery life on other occasions.
Another important finding: some games, especially older ones, don't work very well with the Intel Speedstep technology, and you can exprience hick-ups here and there. To fix that, change the power management scheme from "Portable/Laptop" to "Always on". In that case, the CPU frequency won't vary anymore. You can double-check with any utility that will report the CPU speed.
These two advices impact battery life, so keep track of what you're doing if you need to maximize battery life on other occasions.
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