Here's fine too lol. You go there, and they'll be strong arming you into getting a brand new IVB system or waiting for a Haswell machine.
That 4870 is still a very viable card for low res, single monitor gaming; you should overclock the s.o.b using Ati Tray Tools
ATI Tray Tools from Guru 3D
A very nice app that over and underclocks your card to whatever speeds/voltages you want it to be at, including profile support for multiple user scenarios and FPS overlay support. I use it to squeeze abit more life out of my 4 year old heavily abused laptop 4670 card lol. The last update was in November 2011 but for our outdated cards it suits us just fine.
As for that intel E7400, since we're talking pre i5/i7 architecture before Intel locked out FSB/base freq overclocking in the Non K cards (2500K/2600K for example), you should be good to with simple FSB overclocking in the BIOS as the mulitpliers are locked in the non Extreme, mainstream versions of the processors. Your BIOS should have the details, you should be good to go to 3 - 3.5 GHz depending on your cooling system (aftermarket or stock Intel cooler?)