Saw that they disabled iGPU again in y510p, anyone know if it's disabled as well in y410p?
So optimus is disabled to make way for SLI but why is Lenovo now claiming 5 hours of battery on the new y510/y410 when it was 3 hours on the y500/y400?
Where did they magically find 2 more hours of battery life when the intel gpu is disabled?
5 hours of battery life on a Lenovo Y410 / Y510 is a marketing claim.
It's pretty common to have inflated battery life claims from marketing. They usually say "Up to XXX hours on battery life", assuming that you're at minimum screen brightness, with all WiFi / Bluetooth radios off, with your computer at near-idle (e.g. typing a document in Microsoft Word).
For a high-powered machine like a Lenovo Y410 / Y510, the improvements to battery life going from Ivy Bridge --> Haswell will be nearly negligible, since CPU power draw is a much smaller proportion of overall system power draw (due to discrete GPU and large screens) compared to something like a small 11.6" or 13.3" ultrabook with a low-res screen.
I apologize if someone already brought this up, but it appears that the Y410P might actually be lighter... I believe Lenovo has some typos on their site. For example, the first pic below shows that Lenovo lists both the Y400 and Y410 as 5.5lbs even though the 410P is thinner. When you go into the "Learn More" of the Y400 and select the "Tech Specs" tab it now shows the dimension incorrectly (actually the Y410P dimensions) and a weight of 4.85lbs which would make more sense for the Y410P weight. The weight difference and the screen make a huge difference for me and will actually prompt me to re-order.