Hi Guys, I am sure that this can be solved easily by someone who knows there stuff with UAD1 & HD 8. What I (and others I suspect) need is some definite answers about the UAD cards so we can sell or keep. There seems to be a lot of posts re peoples particular problems but I would love a general set of specs of what these cards can and can't do on HD8. I have moved from Cubase 4.1 to HD 8 and the UAD latency is a real issue. Latency is also determined by your hosts CPU power?, so mine is Dual G5 2GHZ. I have discovered via DUC and by trial an error with the UAD 5.2 (thank god I didn't delete this version!) pro tools buffer tab is that - - If I use the latest drivers (5.4) it creates a massive delays on plugins, if you run at 512 samples (in tools). This is as we know the doubling of the buffer size in the UAD card. The delay is just within ADC's boundaries for tracks. As far as I can tell this means that if you use the latest software you are limited to 1 UAD plug per track and you'll never get one on a AUX (sub group). - if you use version 5.2 and cheat the buffer size to half of HD 8 256 samples i can squeeze 1 UAD plugin on a group, but if add a plug of reasonable delay on a track thats feed to the group its over the ADC amount. - When mixing I always set the buffer to 1024 for power and stability that means the UAD card is useless as the ADC can't cope. Is this actually the case? What I need answered is : 1. Is there is no stable solution to make the cards work on HD and function just like any other plug (be it with large delays)? 2. Am I missing something major? (apart from upgrading to PCIe HD and UAD2). It seems a shame as I have 6 cards in 2 different studios thats are amazing tools for the power and sound and I really don't want to sell them for TDM plugs......yet. Thanks tko STL Audio