PureOverclock posted a review on the Galaxy Geforce 7900 GT

Overclocking performance is a major reason for owning a 7900 GT. At stock it already beats its competition, so when we delve into overclocking it's all about getting GTX-like performance for a lot less money.

That's not a typo, the memory really did reach 900 MHz! The core reached a reasonable 578 MHz. It's interesting to note that the clocks reached are going to give it a huge boost not dissimilar to the 7900 GTX which at stock is 650/800 - you can clearly see that though the core is lower here, the memory is much higher, so you never know, it may even outperform a stock 7900 GTX!

Galaxy Geforce 7900 GT Review