I've done something similar with my machines, because it was so much cheaper than getting something new. You can get a quad core CPU for about $10, 16GB of DDR

I've done something similar with my machines, because it was so much cheaper than getting something new. You can get a quad core CPU for about $10, 16GB of DDR3 for about $100 and an SSD for $50. Even if you add a better heatsink and GPU, it's still cheaper than the cheapest machine you can get new (and they come with 4GB, which isn't enough nowadays).