Both models
i3-3240 and
i3-3217U are based on
Ivy Bridge architecture.
"Ivy Bridge is the last Intel microarchitecture for which there is official driver support for Windows XP . It is made under 22 nm Tri-Gate transistor (""3D"") technology and is basically a Sandy Bridge shrink. It has PCI Express 3.0 support and RdRand instruction for security tasks."
Using the multithread performance as a reference, the i3-3240 gets a score of
49.7 k points while the i3-3217U gets
35.8 k points.
Summarizing, the
i3-3240 is
1.4 times faster than the
i3-3217U . To get a proper comparison between both models, take a look to the data shown below.