Ask for advice cheapest upgrade

Users questions: CPU: Celeron 293 + fan Motherboard: ASRock 775 Memory: Kingston 512M (a) hard: MAT80G * 7200 turn Drive: Jian-xing 16 * DVD Graphics: MX400128M * 128M Chassis: P4350W + power supply This is my configuration in May 2005 Computer, the cheapest upgrade program taught Thank you, thank you for your interest, because I installed the network game "Cross Fire" and has been reflected in very slow. And when the Internet Web pages or if you open too many application software, system response will be very slow. Taking into account their own economic situation, so ask for advice we aim As much as possible to play 3D games, of course, like Need for Speed ​​13 and do not wish for World of Warcraft. CS and CF is the most thought. Then there are the normal case, multi-task operation. Thank you, I will raise the reward points Thank you for
Experts answer: do not know what the purpose of upgrading, if it is to improve the speed , Have some headroom. If the last two years to meet the running out of 3D games are basically the machine should be renewed, no upgrades necessary. Upgrade sequence is as follows: First, add memory, add memory, do not discard the original hardware, best buy, plus a 512M enough, more meaningful. Followed for CPU, ASRock 775 there are a variety, do not know which one you are, I checked, seems to support the Pentium D dual-core, if we can switch to dual-core CPU, will significantly enhance computer performance (see the model up to the Internet to check What CPU). To upgrade the CPU, replacing the old should be sold to the original CPU Cargo business, the number looking for a little back. In addition, if less out of play the new 3D game, unnecessary l graphics cards, such as want to play, should be renewed machines, no upgrades necessary. There is no need to upgrade power supply, nothing. Motherboard + RAM + HDD + CPU + graphics card + drive + other = 45 +10 +30 +4 5 +40 +20 = 180W 200W ,220-250W rated adequate.
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