560 and 560ti in SLI?

Thanks. Saved me just in time.  

I'm glad I could help.

Just thought of something else... what about pairing my card up with a non-O/C version of the GTX 560?

That should work OK.

Thanks again. Then both cards will run at the slower card's speed?

If the non overclocked card can run at the same speeds as your current one, you can run it that way. MSI Afterburner and EVGA Precision should both allow you to adjust the speeds accordingly.

Edit: You don't need both, just mentioning that both should give the option to adjust card #2's clock speed to match card #1.

Thanks to both of you. It is a moot point for the time being. I just checked and my PSU is too weak for 2 GTX 560s.  
So, I'll have to either spend more $ or stay with what I have.

PSU = 550W Antec with only 2 x PCIe cables.

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