1.It costs more than normal DDR3 1333mhz ram but has limited 10 year warranty. 2.If u want only 4GB of Ram which is the bare minimum for normal day to day usage consider 4Gb only if u want to run the ram at it's full potential u need 2+2Gb sticks in dual channel mode for optimal performance n 4+4Gb sticks in dual channel mode this is good for those who have old pc with just single stick of ram running in single channel mode. 3.Now about d actual speed which ram works 1333mhz mean 1333/2=666.5mhz actual speed per stick n 1600mhz mean 1600/2=800mhz actual speed n about CAS latency timings the tighter the timing d faster the ram performs CAS 7 is faster than CAS 9 timing this is possible when the ram supports that CAS latency timing u can get so more performance. 4.When gaming the speeds of 1333 or 1600 Ram is not noticeable but when video editing/Converting n DVD burning tasks the 1600mhz wins cause of d extra "mhz" 800-666=134mhz mean d 1600mhz runs 134mhz faster than the 1333mhz ram. 5.If u want performance u can go for d vengeance ram n Over clock to 1866mhz speeds where actual speed is 933mhz blistering app performance n pc speeds up. 6.If u r not in to over clocking buy a fast cpu with high clock speed paired with 4-8Gb of 1600mhz of ram in dual channel config.

This is my first custom computer built. Ordered all the parts (except Cabinet and PSU) from Flipkart. First of all, I would like to appreciate the guys at Flipkart for their awesome customer service. They delivered each and every product bang on time. Now moving onto the RAM. If your primary purpose of buying a computer is gaming, BLINDLY GO FOR THIS RAM. There is no need to buy Corsair Vengeance unless you are looking to overclock it.I got this product for Rs. 2000 only My Windows 7 rated it 7.2 out of 7.9. My Specs: Intel Core i3 3220 @ 3.3 Ghz || ASRock B75M GL R2.0 || Corsair 8GB DDR3 RAM @1600 Mhz || Western Digital Caviar Blue 500 GB SATA 3 @6GB/s || His AMD/ATI Radeon HD 6670 1 GB GDDR5 ||