Worth upgrading 2008 build or wait a buy a new system?

Aphorism

Honorable
Oct 20, 2013
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10,510
This has always seemed like a really helpful forum, so I thought I would give it a shot.

A (more knowledgeable) friend who I can’t tap up for advice anymore built a computer for me back in 2008. I’ve upgraded a couple of bits over the years - replacing the graphics card when the old one failed and increasing the RAM recently to 6GB (I was planning on upgrading the OS to Windows 8 shortly).

As far as I understand it, to get a modern processor (i3/i5 etc), I’d need to replace the Motherboard, RAM etc, i.e. pretty much start from scratch. If I’m putting off getting a new system for a year or two, is there anything worthwhile upgrading from a cost/benefit point of view (e.g. a new CPU, albeit one a few years out of date) to give it a bit more oomph or am I better off just saving my money for a new computer. No fixed budget, I suspect I am limited by the existing hardware more than price, but to pick a figure I would be prepared to spend maybe £100-150 or so if that was likely to make a noticeable improvement, potentially a little more if that would increase the computer's useful lifespan. At the moment it's a little more sluggish than I would like, but I can probably live with it if that's the better option.

They system is for general home use, some games etc.

CPU: Intel Core 2 Duo E7200 2.53GHz (1066MHz) Socket 775 3MB L2 Cache
Mobo: MSI P35 Neo2-FR iP35 Socket 775 8 channel audio ATX Motherboard
RAM: 6GB - Crucial 4GB kit (2GBx2) DDR2 800MHz/PC2-6400 and OCZ 2GB (2x1GB) DDR2 800MHz/PC2-6400 Platinum XTC Memory Kit CL4 2.1V
GPU: XFX HD 4870 XXX Edition 1GB GDDR5 Dual DVI HDTV Out PCI-E Graphics Card
PSU: Corsair 550W VX Series PSU - 120mm Fan
HD: Western Digital 500GB Hard Drive SATAII 7200rpm 16MB Cache
OS: Windows XP SP3 (32 bit)
Monitor: 23” ViewSonic VP2365-LED - LCD display – TFT

Any thoughts gratefully accepted.
 
Solution
I cant really recommend any upgrades. Theres nothing that significant you can do without replacing a lot of parts and spending a lot of money. I recommend saving that money for a new build.