Help Overclocking GTX260 SLI Core 192+216

I realize that there are many guides to overclocking the GTX260 out there. Heck, there are even guides to overclocking SLI'd 260s. However, I haven't been able to stumble upon a guide pertaining to overclocking an SLI configuration of one Core 192 and one Core 216. As such, I have no idea where to start. Any advice, direction, or instruction would be deeply appreciated.


Prevalent info (As indicated by Everest Ultimate edition):
Motherboard:
ASRock K10N780SLIX3-WiFi

Chipset:
North Bridge: AMD K10 IMC
South Bridge: nVIDIA nForce 780a SLI (MCP72XE)

Graphics cards:
GPU 1 (core216): PCI Express 2.0 x16: XFX GeForce GTX 260
GPU Clock (Geometric Domain) 576 MHz (original: 576 MHz)
GPU Clock (Shader Domain) 1242 MHz (original: 1242 MHz)

GPU 2 (core192): PCI Express 2.0 x16: MSI nVIDIA GeForce GTX 260 (p651)
GPU Clock (Geometric Domain) 301 MHz (original: 620 MHz)
GPU Clock (Shader Domain) 602 MHz (original: 1296 MHz)

*GPU1 is idling at 53 C and GPU2 is idling at 45 C under current settings and clocks.

PS. I don't know why the clocks for GPU 2 (core 192 one) is cut in half, it's very odd. I believe it's just doing that for power saving purposes, because when I open up a game, the clocks go back up to default levels again. Anyways, I confirmed these data with GPU-Z just incase Everest was inaccurate.


If you need any more information not included here please, by all means, feel free to ask. I will post it up as promptly as possible. Again, thanks so much for your help.