V-sync and Win2000

[GT98]

How do you disable V-sync in Win2000 with the newest beta drivers?

Thanks

Scott


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Abit BH6 with a P3-450@558,128mb RAM,G400 MAX,SB Live!, Optiquest V95 19in montor, Asus 40x CD-ROM, Aopen 5x DVD-ROM, 2x CDR,SupraMax 56k modem, Win98 SE on Western Digital 30.7GB, Win2000 on a WD 13 GB HDD

[Scytale]

Merge this into the registry:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\G400\Device0]
"User.FlipOnVBlank"=hex:00,00,00,00
"User.TripleBuffer"=hex:00,00,00,00

[GT98]

ummmmm how you do this???

I tried adding it in as binary didn't work.



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Abit BH6 with a P3-450@558,128mb RAM,G400 MAX,SB Live!, Optiquest V95 19in montor, Asus 40x CD-ROM, Aopen 5x DVD-ROM, 2x CDR,SupraMax 56k modem, Win98 SE on Western Digital 30.7GB, Win2000 on a WD 13 GB HDD

[Scytale]

Just copy and paste the text from the code section into a text file and save it with a .reg extension. From explorer, right click the file and select Merge.

The text may need a blank line after the line containing 'Windows Registry Editor Version 5.00'. It was there but deleted by the UBB code tag.

Finally, if you don't want to disable triple buffering you should delete the last line before merging.

[Ashley]

Do those switches actually work?
I think not.

[Scytale]

FlipOnVBlank showed improved peak framerate in UT when UT's UseVSync=True(!). In my case staring at a wall went from a clipped 75/85 (depending on monitor refresh rate) to 115-120. This was tested with both the latest and previous W2K beta drivers.

I didn't bench the TripleBuffer setting, so I cannot tell for sure if it works. NTRegMon showed that the key is read when launching UT though.

[Ashley]

I could be wrong Ray, but a pure D3D FPS test at 60Hz returned 60 FPS whether FlipOnVblank was set or not. And with TripleBuffer set, I would expect to get an insufficient-memory error from DX at higher resolutions, and I didn't.

(I assume we are talking about the latest public betas?)

[Scytale]

Yes, I was talking about the public betas. I just checked again and the FlipOnVBlank with UT results are consistent.
Also, I noticed much tearing with the Wheel Of Time game (Unreal/UT engine) when FlipOnVBlank was disabled and WOT's UseVSync was set to True. It disappeared when I changed the value for WOT's UseVSync.

Therefore my only conclusion can be that assigning zeroes to FlipOnVlank has the desired effect on VSync with the Unreal/UT engine (on my machine).

I will check some other D3D games and benchmarks for consistency. You may want to check the results with the UT demo for yourself on your machine. Just enter 'timedemo 1' from the console, bump into a wall and look at the 'last second' fps rate.

[This message has been edited by Scytale (edited 19 February 2000).]

[Ashley]

Hmmm... Seems to me you are seeing the effect of the game engine's UseVSync switch, not the driver's FlipOnVblank switch.

[Scytale]

Yeah that too. But if that would be the (only) case, how do we explain the WOT tearing?

[Ashley]

No idea.

I'm going to go download the WOT demo now. With my ISP and at 70+ MB I should be able to get back to you, oh, say sometime in the year 2005...

Anyone else?

[Scytale]

Well, if everything else fails it's a nice demo. I'm having a bit of a problem myself to get other benchmarks working. So far everything I tried failed someway or another.