I'm sorry for not providing those details. As I said in my original post, hardware differences seemed not to matter during my testing with three different machines here. I am indeed surprised that you do not experience this. It seems there's more going on than I originally thought. I better stop assuming for now smile

Okay, this happens on the following systems, playing NTSC-U ROMs, monitor refresh rate forced or set to 60 Hz (it originally registered as 59 on one monitor here, which is a known "problem" with 7, as I detailed above -- though it doesn't make a difference whether I use other monitors or whether I force it to 59 or 60 Hz) via the NV control applet or otherwise, VSync plus triple buffering enabled, timings set to "synchronize to refresh rate" and sound latency to "1", fullscreen or not makes no difference:

Win7 x64 RTM plus all updates
ASUS Rampage II Extreme on AHCI mode, Intel ICH10R chipset
Intel Core i7-920 down-voltmodded & overclocked to 3.6 GHz
6GB OCZ DDR3-1600 RAM at 1443 GHz
NVIDIA Geforce GTX 295 (w/ 3D profile overclocked & VBIOS-down-voltmodded to decrease heat generation)
Creative SB X-Fi PCIe Titanium Fatal1ty Pro
All the latest drivers/firmwares/BIOSes through Station Drivers et al.
Everything's stress-tested and stable.
(ASUS provides no HPET option in their R2E BIOS. The device manager thus lists it but says that "no drivers are installed for this device." I guess that means I'm still on RTC?)

Next was on a laptop:
Win7 x64 RTM plus all updates
CLEVO M570RU-U, Intel ICH8R chipset
Intel Core2Duo T-9300, 2.5 Ghz
4GB DDR2-600 RAM
NVIDIA Geforce 8800M GTX VBIOS-modded to 9800GT (w/ 3D profile overclocked)
Integrated Realtek HD Audio
All the latest drivers/firmwares/BIOSes through Station Drivers et al.
(Of course, no HPET option here either. Phoenix TrustedCore BIOS options are notoriously sparse.)

And another desktop:
Win7 x64 RTM plus all updates
ASUS P5B Deluxe, Intel ICH8R chipset
Intel Core2Duo E6400, 2.1 Ghz overclocked to 3.01 Ghz
4GB DDR2-800 RAM
Sapphire ATI Radeon HD 5870 Vapor-X, Rev. 2
SoundMAX Integrated Digital HD Audio (AD1989)
All the latest drivers/firmwares/BIOSes through Station Drivers et al.
(No HPET option here either.)

New Forceware drivers finally curbed the latency issues on my laptop. DPC Latency Checker now shows no latency abnormalities on all of them.

I typically use Megaman 2 to test this, as its intro's long notes demonstrate it quite well, though it happens on all of them. As I said, setting sound latency to "1" merely reduces the problem. The ROMs themselves are known good ROMs. This is all done using your 1.41 release. CPU usage on the C2Ds never exceeds 8% and my Core i7 registers 4,5% maximum as reported by the newest Process Explorer 12.01.

So there you go. Let me know if you need any further help tracking this down. I'm willing smile
Thank you for the taking the time to help!

Last edited by gummybear; 04/06/10 01:58 PM.