Can I Upgrade This Computer?

So I found a decent budget computer on Amazon (http://www.amazon.co.uk/Dell-Optiplex-755-Desktop-PROFESSIONAL/dp/B002H9RL5O/ref=sr_1_1?s=computers&ie=UTF8&qid=1350313654&sr=1-1) and I was wondering to Upgrade the Processor to i5-i7 and the GPU to ATI Radeon hd 7970 and 8GB Ram but I realise I would probably Have to go out and buy a whole new motherboard along with the Items above, so Tell me Which is better?
Existing PC:
Processor: Intel Core 2 Duo 2.2-2.6GHz
RAM: 2GB (I think it’s DDR2)
Hard Drive: 1TB with Windows 7 Professional
Optical Drive: Unknown (DVDROM\CDRW (Combo)?)
Motherbaord: Unknown
Graphics Card: Unknown (I think Intergrated)
Case: Dell Optiplex 755 (Yes I know :P)
Switch To:
Processor: Intel Core i5-3570K 3rd Gen (4 x 3.40GHz) ivy Bridge
RAM: Corsair Vengeance 8GB
Hard Drive: Probably Leave the Same because of the OS Pre-installed
Optical Drive: Probably Leave the same, doesn’t Matter TOO Much
Motherboard: Would this be necessary? If so, Probably Asus Sabertooth Z77
Graphics Card: ATI Radeon HD 7970
Case: Leave the Same, but it would be Pretty Ugly 😛
Or if I were to Buy the parts to build my OWN PC?:
Case: NZXT Phantom 410 Black & Orange
Motherboard: Asus Sabertooth Z77
Processor: Intel Core i5-i7
RAM: Corsair Vengeance 8GB-12GB
Power Supply: Corsair CMPSU-600CXV2UK Builder Series 600W Power Supply
Hard Drive: Seagate Barracuda 1TB & SSD 256GB
Optical Drive: Something with Blu Ray 😛
OS: Windows 7 Home Premium – Professional
Which would be better? In terms of money I guess. Would It be cheaper to re-make a computer or to build a new but better computer? I play Minecraft and PC Games quite alot (Mostly Minecraft :P) And I really want to play them without lag on high-quality but that doesn’t happen with a Laptop that is 3-4 Years old. What would you guys Recommend? Upgrade or Build?

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2 Responses to “Can I Upgrade This Computer?”

  1. Dave says:

    So you’re looking at a $700 PC for minecraft?
    To play minecraft on high I’d recommend:
    A 64bit operating system
    4gb of ram
    A dual core CPU (it really doesn’t take much)
    A GPU above $50, say geforce 9800, or a 240, or like a 430.
    Beyond that, your best bet would be to go to a computer store and consult with them if you want to build your own, or to buy a prebuilt.

  2. ProfGene says:

    If you have to buy a new motherboard then you are basically building a new computer and just using your old one for the case and the peripherals. So rather than do that it would be better to sell the old one give to some family member or have it as a second computer yourself than to use it just for a case and to buy a case and the parts that are suitable for whichever motherboard and computer you want to build. If you do that make sure you have a case with a big enough power supply to handle the motherboard and the graphics card and the other features of the system you are building. But you are right if you want a new processor you will need a new mother board and make sure that motherboard has the right slot for the graphics card you are installing. The only way you can upgrade your old computer to speed it up would be if it can take more RAM that you have and to tuneup the software by cleaning it with an anti malware and and a virus cleaning program to defrag the hard drive and to open up the case and clean all the fans of dust and clean all the dust and dirt from the interior which can be done with vacuuming and the fans can be cleaned with a toothpick or a wooden skewer stick and maybe a small brush. There are special electronic sprays for cleaning connections.

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