Struggling with NUllDC too. Recently replace graphics card to 1GB version - consistent framerate around 60 and gfx a lot better. But still the annoying crap with stuttering sound (not AS bad, but still enough to make it annoying). No matter how ahrd I trawl - can't seem to find the answer to this- whether it's hardware, plugins, ROMs or OS's Recently thought it was XP + DX cap on Ver 9, but another fella said he had it working fine on XP! Anywhoos, to contribute to taming this emulator, my system specs:
Mainboard :   ASRock 4Core1600-GLAN
Chipset :   Intel G31/G33/G35
Processor :   Intel Pentium XE 935 @ 3200 MHz (2 Core)
Memory :   2048  MB (2 x 1024 DDR2-SDRAM )
Video Card :   NVIDIA GeForce 9600 GT
Hard Disk :   MAXTOR STM3320820A (320GB)
Hard Disk :   Western Digital WD2500KS-00MJB0 (250GB)
CD-Rom Drive :   DTSOFT Virtual CdRom Device
Monitor Type :   BenQ BenQ 241W - 24 inches
Network Card :   Realtek Semiconductor RTL8168/8111 PCIe Gigabit Ethernet Adapter
OS :      Microsoft Windows XP Professional 5.01.2600 Service Pack 3 (32-bit)
DirectX :   Version 9.0c  (May 2010)
Cheers