Upgrade to Current PC

Hi i am looking to go Crossfire with 2 HIS Radeon 7850's here are my questions;

I am going to upgrade to windows 8 will i notice a performance difference?
Im running a Seasonic 620 watt PSU will this be sufficient?
other parts are:
Intel i5-3570k(at stock settings)
16 GB Gskill ripjaws 1600 RAM
(quick side note on this whenever i try to go dual channel with these i get a loud beeping noise and my computer reboots should i be concerned?It works fine in single channel mode however)
ASRock Z77 Extreme4
CM hyper plus cpu cooler

Thanks in advance!
6 answers Last reply Best Answer
More about upgrade current
  1. Best answer
    you will see a small performance improvement when going to win 8
    "600W power supply (or greater) with two 75W 6-pin PCI Express power connectors recommended for AMD CrossFire™ technology."
    what slots is your ram in? for dual channel it should be in slot 1 and 3 or 2 and 4
  2. i tried both of the configurations you mentioned and both times i got a loud beeping noise but when in single channel mode thew work fine so i know the slots aren't dead
  3. You won't notice improved performance with Win8.

    The Seasonic is sufficient.
  4. yes you will see performance improvement...small but still windows performance score increased too
    I would contact asrock as to why you can't get dual channel to work..with dual channel your system will be faster
  5. Best answer selected by cdiscoll2012.
  6. I will do that
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