4770 HD OC sweetspot?

I have an XFX 4770 HD. I had it stock for a good while but recently got into overclocking (It's ADDICTING!). Anyways currently I up'd the GPU clock to 920MHz / Memory Clock 1340Mhz and seems to be running good, max temp at load is 74c

Should I leave it at that. Can I go higher? Should I go lower? Anyone else overclocking card with feedback would be great.

Anyone?

The amount of overclocking you will achieve varies from one card to the next, just keep going until you find it to be unstable in games/benchmarks.

Cards can run up to 100C fine (My old GTX295 happily ran all day at 103C under load!) but it is better to keep it cooler, I would say 85C maximum is probably a good number. That is quite a nice overclock!