A 7450 will never get you that. There's nothing you can except to upgrade. A 7450 is not a gaming card by any stretch of the imagination.
If you want to play BF3 on high settings @ 1080P. Your going to need at least a 7770 Video card or better. (Assuming you have no AA)
And since HP's come with Generic cheap chinese made POS Power supplies you'll need a new one of those as well.
I5 3570K@4~5.0ghz: Gigabyte GA-Z77X-UD3H:Corsair Hydro H70w/Delta 240CFM Fan: 16GB Corsair Vengeance DDR-3 1600: 2 XFX Radeon 7950 @ 1150/1575 : Corsair AX 860 PSU: x2 WD Black 1TB HDD's: 90GB OCZ Agility 3:CL X-FI:Corsair 500R Arctic White Edition:3 22inch Asus monitors Eyefinity @ 5294x 1050(bezel comp) : Alienware Tact-X Keyboard: Naga Razer gaming mouse:Corsair Vengance 1500 Headset .
09:12 PM by