Looking to upgrade to run Skyrim better. Is my CPU/RAM a bottleneck?

[dashogun]

My custom build from many years ago has been serving me well but now I am starting to feel that it is meeting its end. I've replaced the video card about a year ago, however Skyrim still shows poor framerates in high demanding scenes (such as snowy weather). I have the settings on high at a 1920x1200 resolution monitor.

Core 2 Duo E6750 2.66GHz
G.skill 2GB DDR2 1066
Gigabyte P35-DS3R motherboard
One Radeon 6950 2GB
Corsair 520watt
Seagate 1TB 7200rpm SATA hard drive
Windows 7 32-bit

Would I see major changes if I upgrade the ram to 4GB and switch to a 64-bit operating system? 8GB of ram nowadays at 1600MHz is affordable nowadays so I can go as high as that if needed. Or is the CPU the main bottleneck? I was looking at the i5-2500k as a worthy replacement.

*edit: I also have been reading around that AMD's cards have been underperforming on Skyrim and we will have to wait on an update driver. Not sure if this is true.

 

[Night Fox]

If you can do it, I'd upgrade ram, mobo, and cpu...i5-2500k, ASUS P8P67 Pro (Rev 3.1), and G.Skill 8gb or 4gb. To lower the price a bit, you can get a cheaper motherboard, 4gb ram, and an i5-2400.

 

[Talyor]

I would upgrade to Windows 7 64 bit so you can use 4 gbs of memory if you plan on upgrading ram and i would get An i5-2400 as the guy said on top of me

 

[Sean W.]

you are also going to be looking at beefing up your powersupply...