Slow motion when enabling 3D (Discover) on some games
On some games (mostly Arkham Asylum) when I enable 3D discover everything goes in slow motion. On JC2, the intro scenes go in slow motion, but the game plays ok.

This quite odd behaviour, as I would expect any performace issue to result in low frame rates, not very smooth but slow!

As a process of illimination I changed some settings. at the lowest possible settings Arkham still went half speed when enabling Discover. to test whether there was still performance issues, I changed everything to ultra hight and increased my resolution to 1080p (i play on 720p as standard) and the game ran ok. so clearly my system is capable of playing the game, but even at lowest resolution and settings i get this mysterious slow down.

My Acer projector arrived today and I am waiting for my 3D kit to be posted, but rather than be excited I am a bit concerned that this bug is going to persist from Discover to true 3D vision.

Is this a known issue?
A performance issue?
or just my usual bad luck!

Thanks!

Dave
On some games (mostly Arkham Asylum) when I enable 3D discover everything goes in slow motion. On JC2, the intro scenes go in slow motion, but the game plays ok.



This quite odd behaviour, as I would expect any performace issue to result in low frame rates, not very smooth but slow!



As a process of illimination I changed some settings. at the lowest possible settings Arkham still went half speed when enabling Discover. to test whether there was still performance issues, I changed everything to ultra hight and increased my resolution to 1080p (i play on 720p as standard) and the game ran ok. so clearly my system is capable of playing the game, but even at lowest resolution and settings i get this mysterious slow down.



My Acer projector arrived today and I am waiting for my 3D kit to be posted, but rather than be excited I am a bit concerned that this bug is going to persist from Discover to true 3D vision.



Is this a known issue?

A performance issue?

or just my usual bad luck!



Thanks!



Dave

#1
Posted 07/29/2010 12:32 PM   
thats weird
disable power saving and C1E in bios ?
ive had ths problem with games waaaay back (no 3d) when AMD cool and quiet randomly kicked in and slowed game down to half its speed
thats weird

disable power saving and C1E in bios ?

ive had ths problem with games waaaay back (no 3d) when AMD cool and quiet randomly kicked in and slowed game down to half its speed

#2
Posted 07/29/2010 06:28 PM   
[quote name='rajkoderp' post='1095750' date='Jul 29 2010, 07:28 PM']thats weird
disable power saving and C1E in bios ?
ive had ths problem with games waaaay back (no 3d) when AMD cool and quiet randomly kicked in and slowed game down to half its speed[/quote]

Thanks, i will check that later.

I was playing street fighter 4 last night and even without 3d it was very slow. I lowered the settings and it sped up considerably.

This is really puzzling me.

the effect I expect from poor performance is choppy, low frame rates. but what I am getting is very smooth playback but at half the speed!

My processor is naff and I only have a GTX 280, but it seems to play almost everything I throw at it, except for the slow down bug.
[quote name='rajkoderp' post='1095750' date='Jul 29 2010, 07:28 PM']thats weird

disable power saving and C1E in bios ?

ive had ths problem with games waaaay back (no 3d) when AMD cool and quiet randomly kicked in and slowed game down to half its speed



Thanks, i will check that later.



I was playing street fighter 4 last night and even without 3d it was very slow. I lowered the settings and it sped up considerably.



This is really puzzling me.



the effect I expect from poor performance is choppy, low frame rates. but what I am getting is very smooth playback but at half the speed!



My processor is naff and I only have a GTX 280, but it seems to play almost everything I throw at it, except for the slow down bug.

#3
Posted 07/30/2010 12:05 PM   
I have just tested my projector and it is utterly amazing. I am using DLP link glasss and it works perfectly.

BUT.

I have noticed that pretty much allgames are running SLOW. I think its not only when 3D is enabled, but it is far more noticable when 3D is enabled.

I find this confusing becasue it plays games ok at max settings - admittedly going in slow mo some times, or if the settings are too exteme, but cannot play games at lowest possible settings with 3D enabled.

Has something changed? i do seem to remember games would always run at the right speed if the graphics card couoldnt cope-but it would be choppy. it seems now that the whole game slows down (enemies, objects, everying) which makes them unplayable.

urely someone knows something about this!!

Mny thanksr the help
I have just tested my projector and it is utterly amazing. I am using DLP link glasss and it works perfectly.



BUT.



I have noticed that pretty much allgames are running SLOW. I think its not only when 3D is enabled, but it is far more noticable when 3D is enabled.



I find this confusing becasue it plays games ok at max settings - admittedly going in slow mo some times, or if the settings are too exteme, but cannot play games at lowest possible settings with 3D enabled.



Has something changed? i do seem to remember games would always run at the right speed if the graphics card couoldnt cope-but it would be choppy. it seems now that the whole game slows down (enemies, objects, everying) which makes them unplayable.



urely someone knows something about this!!



Mny thanksr the help

#4
Posted 07/30/2010 10:43 PM   
I'd start with the previous posters suggestion. Disable power management.
PC games usually use timers to set their speed, rather than the graphics cards refresh rate, it's possible that if power management kicks in after the game starts, and the game is using one of the CPU clock based timers that it would cause a slow motion effect.

Having said that I'd expect a lot of people complaining if they did that, although with PC hardware it's possible that it's not common.

You should also try playing in a 60HZ refresh rate mode to verify it makes no difference, and with and without Vsync on.
I'd start with the previous posters suggestion. Disable power management.

PC games usually use timers to set their speed, rather than the graphics cards refresh rate, it's possible that if power management kicks in after the game starts, and the game is using one of the CPU clock based timers that it would cause a slow motion effect.



Having said that I'd expect a lot of people complaining if they did that, although with PC hardware it's possible that it's not common.



You should also try playing in a 60HZ refresh rate mode to verify it makes no difference, and with and without Vsync on.
#5
Posted 07/31/2010 02:57 PM   
some games DO slow down at lower fps (some need for speed games ive noticed did this), which would explain them slowing down even more when 3d is on
however, most games, as they should, use an absolute timer to update themselves regardless of fps, so less fps = less video upates, but same amount of game updates (choppyness)
some games DO slow down at lower fps (some need for speed games ive noticed did this), which would explain them slowing down even more when 3d is on

however, most games, as they should, use an absolute timer to update themselves regardless of fps, so less fps = less video upates, but same amount of game updates (choppyness)

#6
Posted 08/05/2010 04:48 PM   
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