If you are referring to the Intel D102GGC2, then yes.
250 = 2.5 x 102
2.5 × 102
0.408
Yes, as far as you consider 250 GB is high capacity.
2.50 x 102
It is 0.408
51/125
250 written in index form = 2.5 × 102
speed = wavelength * frequency wavelength = 102 meters frequency = 250 Hz = 250 cycles/second 102 * 250 = 25500 meters/second
Most DDR2 800, or better (e.g. DDR2 1066) should work, but to be sure that the RAM is compatible with the the motherboard, you can check the gigabyte webpage and download the PDF of compatible RAM- http://www.gigabyte.com.tw/Products/Motherboard/Products_Overview.aspx?ProductID=2314
In good condition about £250
Well both of these are good proceesors. But the i7 has 8 cores unlike the quad which has 4. So if you have money I would prefer the Intel i7.