Both models
i5-3470S and
i5-3570S 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 i5-3470S gets a score of
93.4 k points while the i5-3570S gets
102.4 k points.
Summarizing, the
i5-3570S is
1.1 times faster than the
i5-3470S . To get a proper comparison between both models, take a look to the data shown below.