UPDATE 02/21/2012: Please install Verde 295.73 drivers and implement the tweak posted here or here. It is a rude awakening for anyone to discover that their Alienware flagship M18x beast is unsuitable for performing a task as ordinary as handling real time audio because of an unresolved driver bug. It's unfortunate that something correctable like this continues to be the Achilles heel of an otherwise incredible machine. This thread was started for discussion of the DPC latency problem the M18x exhibits with GTX 580M SLI. I moved a number of my own posts into this thread to consolidate the information for Dell's benefit. Those are consolidated in the post below. If you're not familiar with DPC latency first hand, you don't want to be. You can read about it here. For me, this will usually manifest itself as strange clicks and pops in audio, and might be what causes what I like to refer to as the "cyborg" electronic distortion type of sound. I seem to get that randomly while gaming and sound sometimes ends up looping followed by a system freeze that coincides with that audio glitch. It does not happen all the time, but it happens enough that I don't forget about it. It appears this issue does not affect systems equipped with AMD 6990M CrossFire. Additionally, DPC latency does not appear to be a problem running Dell's recommended driver (269.03). Using Dell's NVIDIA 269.03 driver is OK with me for the moment, but it is starting to get a little long in the tooth and we cannot keep using it forever. We need to know what is causing it and how to fix it. Is it something Dell tweaked to correct the problem with their 269.03 driver, or is the DPC latency being caused by something NVIDIA changed in drivers released following version 269.03? Hopefully, Dell/Alienware can shed some light on this for us and produce a solution. If the reason is not known at the present time, then we can include this as an agenda item on the next conference call. Here's where the assistance of the Alienware M18x Community is needed... Before we can expect a fix, it needs to be established that an issue exists that needs to be fixed. If you own an M18x with GTX 580M SLI, please download LatencyMon from the Resplendence web site, run the test for 3 to 5 minutes and see if your test results are similar to mine. Please post your results and specify what driver you have installed. When posting screen shots, please be mindful of forum rules. Images that are too large will be removed, and posts that don't make any sense without the image to reference will be deleted. Please use thumbnails or spoilers, upload the image as an attachment, or resize the image. Thanks in advance for your testing and reporting.