This benchmark is very very cpu dependent and way less gpu dependent. Your low resolution score is faster than me but my high resolution score is higher than yours but that just goes to show you how cpu dependent the benchmark is. 2.0 should fix this issue and will use more video card than the first release, which is good, because it will be scaleable to a wide variety of systems. I think you will be able to run 2.0 on high with no problem. My onboard graphics on my A8-3870K CPU scores only like 1300-1400 on the benchmark but the actual game on medium settings actually runs prety good, only choppy when in town.

My system:

AMD A8-3870K CPU @ 3.4GHz
8GB PC1600 DDR3
nVidia Geforce 560 Ti OEM 1.25GB, 336 cuda cores, previously a radeon 5850 till it died.

My rig will only score about 3900 on low and about 3770 on high, showing how cpu dependant the game is, or at least the benchmark is. Low and high shouldnt be so close, cept my CPU is bottlenecking at low, and possibly a little at high too, thats why your 7770 scores higher than me on low, but doesnt keep up with me at high

I would suspect that if my CPU would overclock to what yours o/cs to, I'd probably score in the 5-6k range on low. I'm an AMD guy when it comes to cpus, and I will be selling the A8 to buy a faster Phenom II CPU. They have one at 3.8GHz and from what I hear, its a beast of a overclocker, so I gotta have it For some odd reason, however, My 5850 would score nearly 4200 in low, while my geforce would only get 3900, which the geforce is definately faster ... think its just optimized for radeons better.

I wouldnt worry if I were you. Your system should slice through ARR with ease, as its already been stated that it will be more optimized and less graphic intensive, although still looking just as good