do find out the particular model number of your i7 cpu
(there is software out there which allows you to do it, or if you’re using Windows you can find out with ‘System Information’ app)
then lookup the passmark score for both CPUs under http://www.cpubenchmark.net/
Keep in mind that you cannot simply multiply the single cpu passmark score by 2 for a dual-cpu system.
Equally, if you have to choose among several CPUs with comparable passmark scores, choose the one with fewer ‘cores’.
Do also take a look at the ‘TDP’ value. Those old XEONs will probably use more power than your single i7.
