Ok so for about the last few months i have had this issue.
Ill start out by posting my computers specs:
Mobo is a G1 guerilla, with an i7 960 processor @ 3.2. Have 16gb of DDR3 dual channel memory and a Gainward 560ti golden sample (2gb) and 875w toughpower psu, win 7 x64
First off everything is in sync and compatible etc with everything, im 99.9% sure its not a hardware compatibility issue, which is backed up by the fact i had this problem with my old computer, which has since been replaced completely, not a single part remains.
OK, this issue seems to be completely random, with no set time or (it seems from my point) point that triggers it. The computer sort of freezes/hiccups, it is really hard to explain. What happens is for a very short time, like 1/2 second the mouse freezes, and audio and video freeze but dont skip, and resumes at where it first 'hiccuped'. This can happen infrequently maybe once a minute to sometimes constantly, 1/2 sec apart from one another in an extreme case which again, seems random. Sometimes i go hours without anything at all. This also happens when i have nothing up and the mouse on the desktop doing the hiccuping, where ill move the mouse and it will skip for a second, then end up half way across the screen.
This happens when i overclock, and run systems normally (reset through bios) respectively, doesnt seem to affect the problem either way.
I have tried absolutely everything but to no avail!
I have updated drivers for everything, run every spyware/malware/trojan/antivirus scan under the sun (with exception to HJT which i cannot seem to get to write a log, another problem all together) all of which have turned over nothing.
I initially thought it might be an overheating problem but my cpu is watercooled, and sits pretty, even under extreme load overclocking, GPU sits at 43 under load, ram again is very cool, as i have an independant ram cooler over them and ambient case temp is very acceptable, dont have a specific temp reading but has good air flow, tidy cables and HDD's never run hot either (1x 1tb, 1x 2tb, 1x 320GB SSD).
Next was the overload approach, but idle cpu sits at 1% and playing media, either through wmp or vlc, still sits at 1-2% and still hiccups, ram sits pretty with usually 14/16gb available, 11.5 free and 2/31 commit. Have done numerous ram checks such as defraggin and diagnostics, all turned up positive.
I have had task manager performance tab up while this hiccuping has happened, but it doesnt show anything, just chugs on at the same pace as usual.
Task manager also says there is only 53 processors active, all which are ordinary - nothing unusual.
Now im more inclined to believe it is an overheating issue as when i put on my case side it happens a lot more often, however again my findings suggest temps are all good - very confusing.
There is no dust at all in my computer im very stringent in cleaning it out every couple of weeks. Cables are all neat, airflow is not blocked, fans running at proper speed. I have a 100ml on the front, going out and a 100 on the back pushing in with an open case. I have put a giant pedestool fan RIGHT up against the case on full throttle and still it does it, which i guess would rule out the ambient temp, which i guess would point the finger at the cpu, or gpu - both of which indicate are running well below any temp (and im led to believe if they were running at unacceptable temps would shutdown).
It doesnt seem to matter how much load i put on the HDD it still does it. I honestly have no idea what it is.
I would post up a HJT log, but that again is playing up, not wanting to save a log, it asks me to save the log, then states it cannot find it then opens a blank log. If i can fix that i can post a HJT log, which would help you?
I have scoured the net for months and found only one person on a blog who had the same problem, but their post went unanswered.. seems like a rare problem.
I hope i have given enough details about the problem and look forward to getting this thing sussed out once and for all - very hard to watch a movie sometimes!