FPS drop problem

[DeepRedAssassin]

I have a problem with my Project Reality which is dropping frames something even to 20. I just got a new video card but i cant see any change :S. fps just going suddenly from 40 to 30 and then 20 and then 50 and so on...
PC specs are here:
Graphics card: GeForce GT 640 2048MB
Processor:Intel(R) Core(TM)2 Quad CPU Q8200 @2.33GHz 2.33GHz

[LITOralis.nMd]

GDDR3 or GDDR5 version of the GT 640?

I suggest defragmenting the hard drive that PR is installed on, the 0981 installer has a lot of files and they seem to be getting fragmented on peoples hard drives.

Also, make sure you completely uninstalled the drivers for your prior video card.

LITOralis.nMd']download this.
Driver Fusion - The Complete Driver Solution

install it, run it, completely uninstall the Radeon drivers.

REBOOT.

Do NOT allow the new hard ware wizard to install drivers.

Download the HD7770 drivers directly from either AMD.com or the GPU manufacturer's website.

Install the drivers, make sure to do a custom install so no junkware is added in the installation.

REBOOT.

You should then be good to go, though on some games you might need to delete the shaders caches once, especially with BF2 and PR.

[Psyrus]

Hey, I actually had a long PM discussion with a guy recently about this same issue. I was glad that there is a solution... but I don't like what it is. Here are some excerpts:

In Muttrah , Fallujah, Vadso and other maps that have big cities, when I get in the middle of the city or the map , or even looking towards the city my fps drop suddenly from over 60 to ~35 fps , some times i even got as low as 23 fps . So how could I fix this , in other games I have no problems ? Should I optimize the game in some specific map , I mean after I delete the cache from Documents/Bf 2 . Thank you

I have a pc build similar to yours :
Amd Phenom 2 x4 3.8 ghz OC
AMD 6970
8gb ram-1333 mhz
MSI 790fx MOBO
1tb wd (7200 rpm , 64 mb)
I think that the problem is that we have amd videocards maybe, does Catalyst AI have something to do with it ?
I'v been trying all kind of things for the better half of the year and I have not been able to see any improvements .

I have done that before [lowering all settings to minimum] but my fps kept going low.

I fixed my fps issues by buying a new CPU , the i5 3570k , now I get 60+fps on every map , fallujah included

Clearly a bottleneck. Rhino talks about drawcalls a lot and I think that is a major culprit. The newer CPUs have higher bandwidth capacities on their buses and so besides higher IPCs, they can receive more data to process at any given time, and spit out that increased load better.

It explains why you'll only see your graphics card working @ ~35% capacity but your FPS are still low.