Real difference between F2-6400CL4D-4GBPK or F2-6400CL4D-4GBPI-B?

[Ronald]

Hello. Is there any difference in performance between F2-6400CL4D-4GBPK and F2-6400CL4D-4GBPI-B kits, or is it just the heatsink?
My motherboard is Asus P5Q-E and I currently have a F2-6400CL4D-4GBPK kit installed. I want to upgrade to 8 GB. Should I replace my memory with 2 kits of F2-6400CL4D-4GBPI-B? Or buy one more kit of F2-6400CL4D-4GBPK? Thank you.

[Tradesman]

In my experience w/ them, the PIs perform a bit better and OC a bit better, but it's not really something you'd 'see', it would show up in benchmarks, depending on your overall rig and settings, but to be honest don't think it would be cost-effective to replace an existing set

[GSKILL TECH]

If you don't really overclock, or try to squeeze every little bit of performance, another kit of the PK will be fine. But if you want absolutely max for your computer, the PIs are best.

Thank you
GSKILL TECH