I found some details on the apparently forthcoming Geforce 7800GTX. Seemingly, the 22nd of June will be the date that NVIDIA "lift the veil" on these cards. No benchmarks exist at this time, but there is evidence to suggest that performance will be very high.

Our sources suggest that card might get as many 3Dmark05 marks as its naming nomenclature number actually indicates. It's not going to be 7800 but it might be very close to that. We are talking about a single card while two cards should score much more than 10K.