Everything is keep freezing after replacing motherboard

[Nejco]

So I replaced motherboard and processor, reinstalled Windows, installed drivers, updates and it's still screwing me. It freezes for 1-5 seconds anywhere in they system (while browsing internet, using steam, managing files). Here's my PC:
http://pastebin.com/NDYSiEEb

Before I had same PC with motherboard Asrock H55M-LE, and Intel i3 540 (3.06GHz). Memory, graphics and everything else stayed the same.

Also CPU usage is very low (under 40), and memory usage is also low. My hard drive is not full, also C where Windows is installed is not full at all.

I'd like to know if anybody has idea what I should try to do.Freezing happens almost everywhere as mentioned before, and I have never seens something like that before. I installed Windows (7 Ultimate 64 bit btw) today so it's completly fresh, and I also updated it and activated it.

Thanks for your help in advance

EDIT: Tryed running Performance troubleshooter and it didn't find any problems.

[_I_]

if you kept the same windows install, reinstall all of the mobo drivers
http://www.asrock.com/mb/Intel/H55M-LE/?cat=Download

6g of ram means 4g+1x2g

is anything overclocked?

[Nejco]

_I_ の投稿を引用：

if you kept the same windows install, reinstall all of the mobo drivers
http://www.asrock.com/mb/Intel/H55M-LE/?cat=Download

6g of ram means 4g+1x2g

is anything overclocked?

I reinstalled windows, and i have 1x4 and 1x2gbs of ram. nothing is overclocked

[time goblin]

something is up with your idle usage, %40? mine is on %1-2 on idle.

[Nejco]

time goblin の投稿を引用：

something is up with your idle usage, %40? mine is on %1-2 on idle.

I'm idling right now it's 3-7%. during saving info, it was probably updating something

[Nejco]

UberFiend の投稿を引用：

Sounds like a memory problem, and sure enough for some reason you have no ram used but 6gb of data stuffed into Page File, which is most likely your issue. However I'm not sure why.

Check both your ram sticks have the same specs.

Go into Advanced System Settings, Performance & set Paging File to about 2000MB (6gb physical + 2gb virtual give 8gb to play with.)

Look in Task Manager or maybe even Resource Manager and see what process is taking all your memory up pls.

Maybe memory sharing or shadowing is on in BIOS?

Checked task managed and everything's fine there. Do you think priority in BIOS could cause such a problem? I had UEFI Drive set as priority (something to do with this MSI bios interface i guess), and my hard drive was only 11th place. Maybe this was causing problems? At the moment it seem to work fine, but I'm not sure if it's over yet.