Question 1

building a cheap system , what motherboard do you recommend for i3 7320 processor?

Accepted Answer

I purchased the "ASUS Z170-E Intel Z170 HDMI SATA 6Gb/s USB 3.1 USB 3.0 ATX Intel Motherboard" for my sons computer and it's worked out very well.  Only trick is that you have to make sure the BIOS version on the board works with the Kaby Lake architecture.  When I purchased my sons, the machine would NOT POST, but I sent the board in and received an updated BIOS and it all worked great.

This was a side effect of buying the KL so close to release and ASUS had already shipped the boards before the BIOS could be finalized for KL.

Question 2

Does this come with a stock cooler/heatsink?

Accepted Answer

Yes it does.

Question 3

How much better will this processor be than my current 4th gen Haswell Core i5 4670?

Accepted Answer

Single-core performance will be better by 15-20% due to the higher clock speed.
Multi-core performance will be WORSE by 20-30% due to the reduced # of cores.
Integrated graphics performance will be "significantly" better (to the tune of 50% or more, depending on what you're measuring) since the HD 630 is much newer than the HD 4600.

Questions & Answers