Thankyou naeem. Advice received caused me to think that intel Core i7 3770 K is a suitable CPU. Thus my Q now becomes what mobo is suitable, given that I need UEFI, displayport, USB 3.O, voice-to-text input. but do not want inbuilt GPU or WiFi, which are in Gigabyte UP7? Is a giga Z77 UDH TH 4 satisfactory? Thankyou again for your comments.