So providing you keep the clocks "linked" there should be no issues at all? Ohhhh and also, seeing as these cards clock in similar fashion to the 9600, if you raise the PCI-E bus on on mobo, you should get further performance increases also?
On your comments above Kursah....yes, I find it ironic to say the least that you are talking about temp issues in relation to the 4870 when it's 55nm and the 200 is 65