Posted 10 July 2009 - 02:21 AM
You failed to mention what video card you got.
If you used the driver disk that came with the video card the 1st. thing I suggest you do is go to the manufacturers web site , download & install the newest drivers.
As for lag I would suspect a software issue.
If you have a security "suite" that has a "real time" adware/maleware scanner it will cause serious lag.
If you are using Internet Explorer 7 & have not disabled the "Phishing Filter" that will cause serious lag.
The network connection you have could cause lag.
Also, When you play WOW are you using the same server as your brother ?
OCZ StealthXstream 700W,Gigabyte GA-EP45-UD3R , E8500, Arctic Freezer Pro 7, 3GB G.Skill PC8500,Gigabyte Radeon HD 4850 OC [1GB ], Seagate 250GB SATA II X2 in RAID 0, Samsung SATA DVD burner.