Random stuttering i7 4790k

laazsx

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May 31, 2014
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Hi Guys!

I just upgraded from a FX-6100 to an i7 4790k 2 weeks ago. I'm very happy with the upgrade and everything's been smooth sailing till yesterday when everything would hang for a fraction of a second and would resume like nothing happened.

My immediate action was to check the task manager to see if thinking is running - nothing there. Restocked the RAM - still no. Checked all the connections - nope. Restored EFI settings to default - nada. It was getting irritating at this point that I decided to reinstall windows. To my dismay, the stuttering still occurs.

So I went online to look for clues. All of the threads I've found regarding stutterings where happening while gaming, but the stuttering happens while I'm browsing, playing music, etc. (it is happening right now)

Having not found any clues, I went back to my cave and tried to figure out what was happening. I've drawn three conclusions - either I had a faulty chip, something was running in the background, or there's some setting in MSI Command Center that wasn't right. So after some fiddling, I found CC's CPU info window. I found out that while task man was reporting 4-6% CPU usage, command center's window showed that the usage was waaaaaaaay off! Core 0 is running at a 50-70%, core 2 would spike to 22%, and core1 and core 3 were always at 1-3%. I tried searching google, but nothing came up.

Appreciate the help!

Specs:
i7 4790k (4.0ghz stock)
8gb 1800
MSI Z97-G55
R9 270 Dual-X
1TB Seagate SSHD
500GB Seagate
Corsair VS550

Edit: I ran prime95 for 10 minutes, and confirmed that core0 is actually running. 6 threads were already done with two but the first two were still working on the first.
 
Solution
550W should be ok.

I got some stuttering on Win7 too but not because of the proc, mobo or GPU.
The culprit was the badly written WLAN card driver.
I installed another driver (unofficial one) and everything is working fine again.
You might wanna check if you have the actual driver for everything you have .

laazsx

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May 31, 2014
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Downloaded sysinternals and ran process explorer. I'm seeing the same stuff resource monitor shows me. The top process ,interupts, is only using 5-7% CPU
 

laazsx

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May 31, 2014
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Oops, I pressed Solution by mistake.

My mistake, my PSU is a VS550. Will update the main post.
Anyway, I've been running without any problems for 2 weeks now and even if the PSU can't supply enough, I'm not even doing anything heavy! Only got 3 tabs of chrome up.
 

laazsx

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May 31, 2014
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The CPU was overclocked but I've returned it to stock since the stuttering started. I've tried diskcheck, not problems there. Will try memory diagnostics after dinner. Thanks!

On a side note, How do I unselect a solution? Couldn't find the button
 
550W should be ok.

I got some stuttering on Win7 too but not because of the proc, mobo or GPU.
The culprit was the badly written WLAN card driver.
I installed another driver (unofficial one) and everything is working fine again.
You might wanna check if you have the actual driver for everything you have .
 
Solution

laazsx

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May 31, 2014
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I think it worked! When I uninstalled the driver, Core0 usage instantly went down. When I reinstalled it, it went up. Funny that the wlan driver was causing this.

Thanks!!
 

laazsx

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May 31, 2014
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So far so good! Been gaming for 2 hours with no hiccups!

@huiun02 I got the D-Link Wireless n150 PCI. Just bought it last year. It worked when I was still on my Fx6100. Windows must have updated the driver with a faulty one. Doesn't matter, I already pulled it out. I don't use the thing anyway.

@guanyu Thanks dude. You're a life saver. I was already considering bringing my pc back to the store.