I used the vanguard 0.3ppm TCXO. I went with the previous suggestion and used the 7805 as the vdd and ground.  I have another STX that I'm going to upgrade. I'll post pics of that one when I do it. This one isn't pretty, there isn't much room to mount neatly on the STX. 

Got it installed. What a difference! The music flows beautifully now, it's like a layer of hash was removed. There's a new level of resolution, cymbals shimmer more and bass is more natural but overall the sound signature is sweeter and more lush. A very worthwhile upgrade. I'm going to do my...

So far I've removed the original clock which was pretty difficult with a single soldering iron and I'd say I've probably fried the original clock. Going to mount the vanguard clock tonight. 

First post... and reviving an old thread. I bought one of those vanguard clocks and I'm going to try this mod. 

bump!

I'd rather have native ASIO. Would reduce jitter I'd imagine. The Xonar D2/PM looks good. I wonder how it would compare to the EMU, ESI or M-Audio offerings.

It's purely for 2 channel. Should have mentioned that. Thanks guys.

I was going to build a HTPC... well more precisely a PC to use as a digital source for my modified PS Audio DLIII to play Flac's and CDs. So far was thinking of using ASUS P5Q Deluxe MB E1200 Processor ?GB Kingston DDR2 800 RAM WD 1TB green power HD I was going to buy an old Graphics...