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#1
Stuttering and high CPU usage while downloading at high speeds
I've been having this problem now for an year or so now. It started when I upgraded my connection from 8/1 ADSL to 100/10 cable (so the problem wasn't noticeable even if it was there before) and when I download at high speeds (in steam, for example) my CPU usage jumps to 80% and higher, and my pc starts to stutter (mouse, audio, everything).
What makes it harder for me to track down, is that it does not happen right after I start my PC. For a good 1 to 3 hours after starting my PC I can download fine at full speed (~12MB/s) without any problems. But after my PC has been on for few hours the problem starts. When ever I download above 5MB/s (sometimes even above 3MB/s) my CPU usage goes to around 75% to 99% and everything stutters, mouse, video, audio etc.
Using Task Manager, it shows that NT Kernel & System is what is using the CPU.
Process Explorer shows Hardware Interrupts and DPCs as the cause for high CPU usage.
I've tried updating my drivers (mouse, keyboard audio, video and network drivers are up to date), but I cannot seem to find USB or hard drive drivers in case it's those that are causing it. If it's even drivers causing it.
I'm using AVG Free and ZoneAlarm.
My HDD is 7200rpm so it should be able to handle 100mb cable connection. (not 100% sure about that)
I've also noticed that my windows has set pagefile at 8190MB, even though it says 12285MB is recommended. But that might not have anything to do with the problem.
Last edited by Vilmu; 12 May 2015 at 01:44. Reason: typos