Finally got back to share some stuff in this thread with the rig. ! it's been an interesting discussion so far, and yep the i5 2400S is a unique cpu.It's probably easiest to post some screenshots- at- glance.
Note >>>. Windows 7 64bit, latest Gigabyte F6 Bios,Nvidia 285.62 -drivers. with new Vid Bios Flash ! ,[more about the 560 Ti cards in the vid clocks & temps thread ], >>> the MS services are 'tweaked' as in day to day use, See Black Viper service tweaks. [modest] ,all screenshot take with the Gimp which is also running.
Ok ! Let's see what the system is at idle

Let's check out some Furmark Burn In with a light 'bump' with the560 Ti's ..& note the cpu clock@ 3750.5Mhz
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Just about to add a bit of Prime95 [Common Blend Test] ..560 Ti's at stock

Running pretty darn solid & Note the cpu speed . an i5 2400 without the S would like have more flexibility , but it is not designed that way.
Furmark Burn In + Prime 95 Blend Run

*** So Far so Good ! & A Pretty good start so far ! with more to come !
....it's really a very sweet rig ! with just one GTX 560 Ti ! [:)]