How many mhash/second will my rig get?

[tlytkine]

I want to start bitcoin mining & I was looking for some advice on how I should start efficiently mining.
This is my hardware:
Intel Core i5 3570S ES 3.1GHz 6MB 65W 22nm Quad Core Ivy Bridge Processor
16gb RAM
PowerColor AMD Radeon HD 7750 1GB GDDR5 800MHz HDMI PCI-E Low Profile Video Card
400 Watt PSU (if that has any influence on performance)
500gb HDD 7200RPM (if that has any influence on performance)
Well anyway I was wondering what software I should be using to mine bitcoins, how many mhash/second I could get and what I could do to maximize my mhash/second rate?
Also, Does anyone knows of a better low profile video card than the 7750 that is  available for purchase for $300 bucks or less?
Thank you, I'm hoping someone could help me out with some advice.

[server]

123

https://en.bitcoin.it/wiki/Mining_hardware_comparison

[kwoody]

for mining purposes, your radeon hd 7750 is the only component that matters. as the guy above me has said, it will push 120-140 mhash/s depending on clock frequency.

[panda1]

You'll need to research which miner software works best for you, but I recommend cgminer/bfgminer to get yourself started.