PQPL-AM; Q9300; 4G DDR2; 350W PS; Win7x64.SP1
BIOS: PCIEx16/PCI 2.1
Nvidia GeForce9500GT PCIEx16 Dual DVI out to a pair of DVI Acer G235H's
Nvidia GeForce6200 PCI DVI out to VGA Dell 2007WFPb (via adapter)
Both cards on same geforce driver: 8.17.12.8026
Using DFPro 3.3.1 and/or 3.4.0, Beta 21
Application hooks disabled; using most features (multi-taskbar, screen saver, etc.)

No problems/lock-ups when running DF for the dual monitors on the express slot only.
No problems/lock-ups when running 2 monitors PCIE, and 1 PCI, without the DF software running.

But when running both PCI cards (3 Monitors) with DF, it constantly locks-up, especially with heavier loads running like CS4, but also happens with just browsers (IE8 and Firefox Beta 6), or just about anything running.

Any suggestions?

Thanks.

Whole system/W7 locks. I am going to try a 500W PS, and perhaps another 4G of RAM, and see what happens.
Windows 7 runs all 3 just fine, albeit without multi taskbar support, and spanned 3 screen wallpaper slideshows.
When I use DF, the taskbars on all 3 monitors are very choppy, and then I'll start opening apps, like Acro, Outlook, WMP, etc. using different displays and trying out different scenarios and all apps running = lock up, and then needs a hard reset.

PSU ugraded and DF taskbars run well.
I think at least 350W for each video card installed on the pci bus (700W PSU in this case).

I had the same problem, in so much as when I had DF (latest trial) installed on my system with 3 monitors (Windows 7 64-bit, two monitors on nVidia PCIe card, and the 3rd hooked up via DisplayLink USB adapter.

System has been perfectly stable for many months now.

The system would intermittently lock up - no error, no mouse cursor, nothing, just a hard lock. Couldn't seem to come up with a pattern or way to replicate it. Sometimes I could go hours or a day, other days it'd lock several times a day.

I had updated my nVidia driver to the newest just before I install DF, so I rolled that back, but it didn't help (so now I'm back on the latest).

I disabled DF for a day and had no lockups. I then re-enabled it the next day and the lock ups started again. I then disabled DF permanently (and re-enabled UltraMon) and haven't had a lockup since. It's been fine for over two weeks now.

So now I'm stuck at not using DF, even though I'd prefer it over UltraMon.

Hi Keith, thanks for the quick response.

I had tried with 3.4.0 (release trial).

As for testing without the DisplayLink adapter attached, I'd say the best I can try is detaching it and starting/running DF over night while I'm not here (unfortunately, I need the 3rd monitor to work day-to-day).

I'll try to remember to give that a shot over the next night or two and report back.

Ok well I never got a chance to try to DF with the DisplayLink adapter disconnected. Turns out I didn't need to, I've had the system lock in the same way twice since I stopped using DF.

So the good news is that my problem is (most liekly) not a DF problem, it was just showing it to me more frequently.

So after I posted that message I went and found out that DisplayLink.com had released a new (v6) driver a few days prior. I upgraded to it, and turned DF back on. So far so good, no more lockups (knock on wood).