I can run Crisis on max settings with 4x antialiasing with only:
8800gt 512mb
4gb DDr2
Intel C2D 2.8ghz
XP Sp3
It all boils down to how well each component works with each other, i.e the best GPU and CPU might not work so well together, bottlenecking can happen even with the best of hardware - Ati + Nvidia = Good, whereas - Geforce board (Nvidia) + intel CPU + Nvidia GPU = Very Good.
Sturm
ahhhh the bottleneck,yes you will always have a bottleneck in ur rig,i mean you got ur components sorted out right,they all match up pretty nice ,the dual core with the 8800(GPU bottleneck fo todays standards)? well that dual core can actually handle game task and also push 5770 which is about 30% better than the 8800 u got there,or how about this do you have SSD? also havind regular spinind drive is bottleneck in ur system.Fact is buddy the more never tech is released people always find some of their components being bottleneck in their PC,its actually how far your wallet can expand.Your system is nice,i know it runs crysis cause i had my 8800gts 320mb with the e6700 running crysis on high too,not crazy high FPS though.But if you trully look into new tech todays,a 5770 or 6770 would be a perfect match for ur CPU,not 6870 though cause then your CPU will become bottleneck.
Dont compare Crysis with RO2,cause when you enter in full 64 player server,big map,tanks,bullets calulation,smoke,explosions your precious PC that used to run Crysis on high will be down to its knees running RO2 on LOW and still have hicups from time to time.
If you wanna benchmark your PC now just to see how it will fair against RO2,get Metro2033 and see what ur PC can do there.
I actually got metro last night on Steam just to benchmark my PC,plus was on sale for $5 so I said what the heck.....I'll buy it.
you can see my HD specs and its speeds in my sig,and these are the results I got in Metro:
1680x1050/ULTRA High settings/DX11 enabled/MSAAx16
-Lowest FPS: 60
-Highest FPS: 195
-Average steady FPS: 98-105