Friends suggest me to buy good configure desktop PC

Well as you wishes to upgrade now, go for a better setup which would serve you atleast 3-4 years or so. For the processor, go with the Quad core(any brand Intel/AMD). AMD are more value for money+ you can always upgrade your processor without any hassle of upgrading motherboard also. But in Intel, if you wish to upgrade processor later on, then you have to choose only that processor which is compatible with your motherboard. RAM-atleast 4GB DDR3 1333MHz or 1600MHz(for enhanced performance) Hard Drive- 1 TB for sure(you can get 1TB for Rs. 3200-3400, and 500GB for Rs.2000) Motherboard--any good brand..if going with AMD setup, then MSI has quite good motherboard which supports USB 3.0 and SATA 3.0(6Gbps). These features are missing in Intel and we all know that in 1-2 years down the line USB 2.0 will be overcome by USB 3.0. Cabinet--Dont buy those cheap Intex or similar cabinet. These looks damn cheap and the quality is really bad. Go for any Cooler Master cabinet. It looks cool and also built quality is quite good + have added advantage of more room for upgrade. Power Supply a.k.a. SMPS-- I've highlighted this coz people in India just dont spend much on power supply coz they dont think its importance.People just take those cheap Intex,Techcomm, or I advice you to spend some amount on good branded power supply.I'm talking about Corsair, Gigabyte and FSP. Go for atleast a Gigabyte 400W/ 460W or FSP SAGA II 450W if getting a computer under 30K. If more budget then go for Corsair VX 400W or COrsair VX 450W. Monitor--Settle for Dell 22 inch or Benq 22 Inch Full HD monitor. They are doing good in Indian market and got the most no. of +ve review from its users.

Oh Mr. Harpreet you have given the whole details of all the parts of the desktop computer!!!!! Thank you very much friend. But may i know the cost of it? because while purchasing we should think about the budget also right? above details very much useful for me i think but just wanted to know the budget.

For Rs.30K or so, you can get a cheap rig as mentioned by amrendra, but if you want a nice and decent computer, then add some money to the budget. Extend your budget to minimum Rs.35K or 40K if you want a good computer which can last for 3-4 years without being outdated and will play all the recent and upcoming games also. So, if you have a budget upto Rs.40K (maximum), then i'll suggest you a decent and most value for money configuration.

Thank you very dear friend, yup i am looking for gaming as well as new applications like it should support such as ORACLE, SQL and memory means harddisk should be more so that it will be good and comfortable for me to work and i want RAM should be more speed or high speed to work in such type of applications.

Honestly, I have no idea about ORACLE and SQL but I did some research on system requirements of these applications: Processor: Intel or AMD running @ 2.0Ghz and above is recommended. Memory: 2GB and above is recommended. For x64 versions of these applications: Processor: Intel or AMD that supports 64bit applications. Memory: 4GB and above is recommended. For your system specifications: Processor: AMD Athlon II X4 Quad-core CPU - (Cheaper than Intel) Motherboard: Asus or Asrock that supports AM3 CPU and Dual-channel support. - (Good quality motherboards on my experience) Memory: 2Gb/4Gb DDR2/DDR3 - depends on the motherboard you have. (Kingston or Corsair are good quality in this criteria). Hard drive: 500GB SATA II (SATA III if your motherboard can support) - (Western Digital Caviar BLACK for better performance.) Graphics Card: Nvidia GeForce with atleast 1GB of RAM - (The higher, the better especially for the latest games you want to play.) Casing w/ Power Supply: 500Watts or higher is recommended - (Antec is good quality casing. Antec power supply is also included). LCD, mouse, keyboard and speakers are optional. These items depends on your preferences. The above specs are only suggestions, you can change any of those items depending on your budget. You can check out newegg for some other items. www.newegg.com Hope this helps! Goodluck!

Hi amarendra ram is ok for me as well as the hard disk but what about this graphic card? i need to have an external graphic card device? And i don't know which processor that you have mentioned. Just wanted to know about the processor so that i can go through it because its only 27K then i can buy that one easily.

-1 for branded system and that too Dell. Thats very costly bro in India. Assembled are the right one as there is enough headroom to allow upgrade at any time. And as you mentioned that graphic card is must in any system, you cant get a high performance graphic card in any Dell machine under Rs 50K or so. Nice graphic cards are only available either in their XPS brand or Alienware. Whereas in assembled PC, one can easily get a nice, decent config under 30K and a good config with much faster and better graphic card for Rs. 35K or 40K. And in performance test, it would easily beat Dell XPS (which is around Rs50K or so without monitor). So, why wasting money on branded PC when you can easily get a faster and more advanced PC by spending less amount.