[How to get the cause of high CPU usage by DPC / Interrupt]

you have uSB issues:

Total = 1241669 for module USBPORT.SYS
Elapsed Time, >     1024 usecs AND <=     2048 usecs,      2, or   0.00%
Total,                                                1241669

The usb drivers polls for devices every 4s:

remove USB devices like your Logitech G35 Headset and look which device causes the issues.

I recently installed a Zalman Heatsink/Fan on my CPU and I think I had unnecessarily tied up some of the power (I had things connected to each other that didn't even need to be connected, I know that's vague but I don't know how else to describe it). I cleared up that issue.

My USB devices are my Das Keyboard, my Logitech G35 headset, and my mionix 5000 mouse.

I connected both USB connecters for my Das Keyboard to the back, I've put my Mionix 5000 mouse also connected to the back (by back I mean Mobo) and my Logitech is connected to the Top of my PC (I have a LianLi case that has a slot on the top).

So I made some USB changes and cleared up what I thought may be a power leak or some crap and it all seems to work so far. If the cackling comes back, Ill be back, if not, I want to thank you very much for your time!

[How to get the cause of high CPU usage by DPC / Interrupt]

Hi Magic Andre and everyone else -

I've sifted through countless google search pages, Microsoft forum threads, Tomshardware forum threads, any forum that I could possible find and have ended up here...

I'm hoping one of you can help me smooth out my PC problem I can't get away from.

I have constant high spikes in CPU usage; LatencyMon blames it on USBPORT.SYS.

I have constant audio and visual problems (cackling and FPS loss) during these CPU spikes.

Using Windows 7 Ultimate

500w powersupply

MOBO: Biostar A870U3

CPU: AMD 965 BE Deneb

Graphics Card: Sapphire Radeon HD 6870

Here is my .etl file - Use your Magic!

If you need any other information that would help you help me, please let me know.

I feel I have every single driver updated, I've reformatted a few times, I've updated every driver manually and also used DriverGenius software to upload all the drivers. My computer may seem to be fine for a little bit but the problem will always come back.