I want to build a new computer. Specs are the following.
-Intel i5 750
-4GB Corsair DDR3 RAM
-Gigabyte nVIDIA 9800GT O.C.
-WD 500GB 32MB SATA HDD
-Windows 7 Home Premium (Retail)
-CM Extreme Power 500W or ACBEL E2 510W -LG 24X DVDRW -AOC 19" LCD
Questions: 1. I want some light overclock to 2.8GHz. Do I need a aftermarket cooler? 2. My existing Dell comput
er has some issues with the power supply. Is CM 500W or ACBEL E2 510W good for my system?
3. Is 19" good for windows 7?
4. Gigabyte 9800GT O.C. great for gaming? I really appreciate for your help. Thanks.
The 9800GT is not a great option for a new build since it uses technology that's about three years old now. You'd be much better off getting a 5770 like suggested above. Even a 5750 would be a good option at the low resolution you're considering.
Neither PSU you listed are quality units. The CoolerMaster unit is an old model POS with no active PFC, only one PCI-E connector, and very low efficiency. A quality PSU is an absolute must.
The 500GB WD drive isn't a good option either since it uses old 250GB platter technology. The new Samsung F3 drives are considerably faster due to using a single 500GB platter.
Please edit your post to follow the format in the "how to ask for new build advice" sticky at the top of the forum so we can help optimize a build for you.