Sudden huge performance drops?

[Huqo]

Around a month ago i got a pretty bad virus on my computer, i tried to remove it and had some luck but i decided to reinstall my windows 8.1 just in case. (I use my computer for work so its pretty important )

Before the reinstall everything worked fine. But after the reinstall everything is starting to occasionally stutter or drop fps. 

 

Microsoft office works fine, but out of nowhere the mouse will start lagging and everything will lag, but after a bit it will stop completely and work 100% again. In my company we use Java for some applications as well and it's even worse (I know Java is pretty bad)

 

The place i notice the most is in CS:GO, and always competitive, sometimes i can play half of the game fine with no lag and 250+ fps but out nowhere my fps drops to 25 - 40 fps for 10 secound and goes back up to 250+ fps again (It usually goes back up to 250+ after a new round starts)

 

I tried upgrading from windows 8.1 to windows 10 with no luck.

 

Hope some of you know this problem

 

Specs:

I7-4790K

Noctua NH-U12P SE2 (kører ca 1200 rpm)

Asus Z97-P bundkort

HyperX Fury DDR3-1600 16GB

ASUS STRIX GTX970

Corsair RM850 Gold

 

 

My CPU runs at a max temp of 45º Celcius

 

[Altecice]

Have you installed all your drivers since the reinstall?

[HoiDaniel]

I have the same issue with my workstation notebook. I think is my RAM-memory that is not working 100% any longer. You might want to run a microsoft memory check.

[bosfreak]

Have you installed all your drivers since the reinstall?

^^, you wouldn't believe how many people forget they have to install drivers again when they reinstalled windows.

also, there are some viruses out there that copy to another drive in the system to reinstall themselves after a reinstall of the OS.

[Naeaes]

If you didn't touch the BIOS while you re-installed it's got to be the drivers. The drivers that Windows gathers itself are most often fine but a enthusiastic-grade board such as your really needs to have them installed from the manufacturer site. They have all sorts of little tweaks in them. If you did pop into the BIOS, check that you still have the XMP on or that the settings are forced correctly. The correct settings are printed on the label on the memory modules. This does sound like a RAM problem to me.

[Huqo]

My bios looks fine, im reinstalling all my drivers atm, hope it helps. 

 

Is the Asus VGA driver for onboard graphics and do i need it when using nvidia driver?

[DotBowder]

My bios looks fine, im reinstalling all my drivers atm, hope it helps. 

 

Is the Asus VGA driver for onboard graphics and do i need it when using nvidia driver?

If you have an Nvidia card, you can use Nvidia's auto detect software to find the right video drivers for your system: http://www.nvidia.com/download/scan.aspx?lang=en-us

[Huqo]

I update my drivers the other day and it seems to be drastically improved, but i still have a bit of stuttering. 

 

I cant enable X.M.P in my bios, its only 1600MHz ram so im not even sure they have X.M.P config.

[bosfreak]

I update my drivers the other day and it seems to be drastically improved, but i still have a bit of stuttering. 

 

I cant enable X.M.P in my bios, its only 1600MHz ram so im not even sure they have X.M.P config.

I presume you got a cd/dvd with the motherboard drivers?

try installing all of them.

[Huqo]

Deleted all drivers and reinstalled the drivers from the DVD, one of the newer drivers seem to be the problem, thanks for the help and replies!