Smoke

I'm not sure if it's normal or just something wrong, but smoke pretty much eliminates my fps.

I get about 110 in a 5v5, but if Im in a smoke I get 5.

I don't have a video card YET but this is the setup I got.

MSI 760GM-P33 AM3 AMD 760G Micro ATX AMD Motherboard
http://www.newegg.com/Product/Produc...82E16813130559

SAPPHIRE Vapor-X 100284VXL Radeon HD 5750 1GB 128-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity
http://www.newegg.com/Product/Produc...82E16814102865

G****ILL NS 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Desktop Memory Model F3-10600CL9D-4GBNS
http://www.newegg.com/Product/Produc...82E16820231394

Antec NEO ECO 520C 520W Continuous Power ATX12V v2.3 / EPS12V 80 PLUS Certified Active PFC Power Supply
http://www.newegg.com/Product/Produc...82E16817371030

Seagate Barracuda 7200.12 ST3500418AS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
http://www.newegg.com/Product/Produc...82E16822148395

AMD Athlon II X4 645 Propus 3.1GHz 4 x 512KB L2 Cache Socket AM3 95W Quad-Core Desktop Processor ADX645WFGMBOX
http://www.newegg.com/Product/Produc...82E16819103885

ASUS Black 24X DVD+R
http://www.newegg.com/Product/Produc...82E16827135204

So is it normal that it decreases my fps by 100? And would getting the new video card sufficiently help with playing through smoke?