Low Yat Plaza
The best center for IT stuff n' such
Less than 10 minutes walk from Sarang Galloway you will find a haven for most, if not all your electronic needs. You will find all housed under one roof, hundreds of vendors selling the A - Z in electronics. All the big brands are there.
If you are not buying new you can get your own gadget repaired on the spot or at the most overnight.
Be prepared to spend at least 2 hours there once you step into the building if you have nothing specific to buy and you just want to browse. I have found that the best time to go would be at about 11 am on weekdays. The crowd is just about to come in and you don't have to jostle with literally thousands of other visitors. The vendors are probably more helpful since their stress level is still below critical.
And if you get hungry or you want a break from PC shopping there's a food court at the Lower Ground Floor offering both local and western dishes. Prices are reasonable.
Bargain! Bargain! Bargain! Bargain! Bargain!
When in Malaysia do what the locals do. BARGAIN! While not all the shops offer bargains most of the smaller ones would offer you a lower price when you counter with a lower price. The trick to getting a good deal is when offering your price do so with a reasonable offer. Ridiculously low counter offers shows insincerity and the vendors usually won't entertain you. The chances are you would get a good bargain if you show that you are a serious buyer and a reasonable price can be arrived at.
Even with the locals - practice makes perfect.
Low Yat Plaza's open 7 days a week including public holidays except for a couple of days for Chinese New Year.
Note: If you need someone who can offer you good advice and service for you PC needs please drop me a line so that I can give you the contact directly.