Yeah, I was able to get them to work a couple of times, but it doesn't last, and there was obvious gliche's. Besides I wanted 20 in's and 20 out's, but bye having to use the spdif I give up 2ins and 2outs on each card which brings it down to 16 total ins and outs. I was terribly angry with the tech support guys, they had attitude problems and literally laughed at me when I told them I was trying to hook up 2 cards on the same computer. EVEN THOUGH the software and advertising says you can easily hook up 4 cards on one computer. I tried different IRQ's, moved the cards to different pci slots, reloaded the drivers numerous times, and everything else I could think of. I had the same problems every time no matter the configuration which could only mean it was the cards not working correctly. Which M-audio's do you have? Maybe it is just the delta 1010 rack's that have this problem. Also what sample rate are you recording at? I am using 24bit 96khz. I noticed the chipset on the M-audio pci cards is actually a VIA chipset. I am not sure if any of you are computer geeks but the simple fact is that when buying a computer for audio the VIA chipset is the hands down worst chipset to get. For audio VIA chipsets are almost useless. Nvidia chipsets are the only way to go, so I thought it was quite astonishing to find that M-audio would be cheap enough to put VIA chipsets on their audio pci cards. VIA is cheap which is why alot of mass computer manufacturers use it (dell, compaq, etc.) because it brings down the cost of building the computer, and unless your recording audio you do not realize how bad that chipset is. One other thing that I wonder about is that the first Delta card I bought was when M-audio was on their own and the second one is after AVID (digidesign) took over M-audio. Was Digidesign unthinking when they took over production and change some of the parts? Thus making it impossible for older cards to coexist with newer cards? We all know that Digidesign has always been one company to "force" people to have to "pay to play" when it comes to their gear. Did they intentionally change the cards to force people to buy their new cards in order to work properly? "Inquiring minds want to know" lol. Either way, I am very displeased with M-audio and will likely not buy anything with that brand name on it in the future. Motu is the way I shall go! (until I can afford all apogee that is