I'm not aware of ASIO drivers for Realtek HW. The ASIO4ALL isn't really ASIO. You want ASIO drivers written for your HW, not something generic. If you're concerned with latency you'll want to get an external device. My DAW is a tower, but I also use a laptop with a Roland Quad-Capture. IIRC it has a latency around 10 - 12 ms and the clock speed is nothing special - 2 to 2.9 ghz.