ATi: 75Hz on any 16:10 Rez?????

[Ev3nt H0riz0n]

To get 1680x1050@75Hz on my 4850 I have to start up PowerStrip which has a 1 in 4 chance of locking up my Vista X64 only when the program starts.
So, has anyone here actually gotten 1680x1050@75Hz to work with any ATi driver using only ATi tools? I'm currently experimenting with settings in Powerstrip such as using 74.953Hz rather than 75.004Hz so lockups don't happen but is there any real better solution?
You would think that Catalyst Control Center allows 75Hz on smaller 16:10 resolutions but it doesn't. I would hope ATi would one day get their act together with their software like Nvidia did and at least add a custom resolution/refresh menu to CCC because force sure as hell doesn't work since it only lists what can already be done making that whole menu useless!!!! I even remember getting CCC and windows Display Settings menu one time to list 75Hz with 1680x1050 but that only resulted in a second of black screen and back to 1680x1050@60Hz and it was listed as still being at 75????


I guess I should have added that I know for a fact my LCD does 75Hz since it is in the specifications and I can confirm that when I use Powerstrip it actually runs at 75Hz at the 1680x1050 resolution via the monitors interface while the other times it doesn't work. This monitor was running at 1680x1050@75Hz with my Nvidia Geforce 9600GSO. I can do 75Hz as mentioned before on normal 5:4 resolutions using CCC and the highest of which is 1280x1024 and yes I confirm it does work since it is saying "1280x1024 75Hz" in the monitors interface. I dunno why ATi's drivers are gimped in not allowing 75Hz in any 16:10 resolution since it cannot be in any way a hardware limitation. Also for whoever says 75Hz makes no difference from 60Hz, you must note that I like to game and while the windows ui is fine and dandy at 60Hz I would like for some of my FPS to count in-game. This is a newer monitor and as shown above some of its 75Hz resolutions are already detected by CCC and actually work. I suppose I should try to see if CCC recognizes it through VGA but I would rather not switch back if you know what I mean.
Specs:
SCEPTRE X20WG-NagaII Monitor
DVI Connection
Radeon HD 4850

 

[bunnyfubbles]

Are you talking about LCD? Unless you're running one of the new 120Hz LCDs you're not really going to be running at 75Hz, 60Hz will be your true max and you'll be fretting over this "problem" for nothing.

 

[California Roll]

Bunny is correct. If you're using a LCD, 60HZ is generally your max. I have an older 19" Dell which shows 75H being available, but it will crash every time if I use it. All of my recent LCDs show 60hz only (as they should).

 

[Modelworks]

I wouldn't worry with the 75Hz setting. The difference between CRT and LCD is that LCD does not do the constant refresh. The 60Hz refers to how many times it can refresh per second, so maximum of 60 updates per second IF the image changes, otherwise it is a static image. The picture is not going to look better at 75Hz. It would look the same as the picture at 1Hz, unless motion was going on

 

[AzN]

Some LCD's do support 75htz though.

 

[nOOky]

Analog input, not dvi supports 75hz I think...
I may be wrong.

 

[Modelworks]

Originally posted by: nOOky
Analog input, not dvi supports 75hz I think...
I may be wrong.

some do support 75hz off dvi.
The reason is that if you play a game and get more FPS than the monitors refresh rate then you will not see all the frames on the display. Though most people don't notice it.

 

[Ev3nt H0riz0n]

I guess I should have added that I know for a fact my LCD does 75Hz since it is in the specifications and I can confirm that when I use Powerstrip it actually runs at 75Hz at the 1680x1050 resolution via the monitors interface while the other times it doesn't work. This monitor was running at 1680x1050@75Hz with my Nvidia Geforce 9600GSO. I can do 75Hz as mentioned before on normal 5:4 resolutions using CCC and the highest of which is 1280x1024 and yes I confirm it does work since it is saying "1280x1024 75Hz" in the monitors interface. I dunno why ATi's drivers are gimped in not allowing 75Hz in any 16:10 resolution since it cannot be in any way a hardware limitation. Also for whoever says 75Hz makes no difference from 60Hz, you must note that I like to game and while the windows ui is fine and dandy at 60Hz I would like for some of my FPS to count in-game. This is a newer monitor and as shown above some of its 75Hz resolutions are already detected by CCC and actually work. I suppose I should try to see if CCC recognizes it through VGA but I would rather not switch back if you know what I mean.
Specs:
SCEPTRE X20WG-NagaII Monitor
DVI Connection
Radeon HD 4850

 

[DaveSimmons]

"Accepts" a 75 Hz signal is not the same as actually displaying 75 frames.

Most 720p TV sets accept a 1080i signal then downsample it. Your monitor probably just ignores the extra 15 incoming frames.

 

[thilanliyan]

Originally posted by: Ev3nt H0riz0n
Specs:
SCEPTRE X20WG-NagaII Monitor
DVI Connection
Radeon HD 4850

This page:
http://www.sceptre.com/Product.../spec_x20wg_NagaII.htm

says that 1680x1050 is run at 60Hz not 75Hz.

 

[Ev3nt H0riz0n]

Well I can force it to 75Hz at 1680 which as you stated is not supported but if the monitor does in fact ignore 15frames then why would any 75Hz resolutions be officially supported? It would suck if the 75Hz settings are there so the company can boast that the monitor can do 75Hz even though it just takes away 15frames. If that is the case there would be no way to tell (assuming the OSD is listing signal) but I originally did notice a difference when my monitor was at 60Hz when I got my 4850.

 

[DaveSimmons]

Why does a 720p TV accept a 1080i signal? Because it can.

More seriously, it gives you more flexibility with the devices sending signals to the TV, so if one device only can send 480i or 1080i you get the best picture sending 1080i which is then downsampled.

If your video card wants to send 70 or 75 Hz instead of 60, the monitor can accept those signals and throw away what it can't use.

 

[CP5670]

There are a few LCDs that actually do real 75hz without dropping frames (and have smoother looking motion as a result), but all the ones I know of are in the 17/19" range. A 1680x1050 LCD is very unlikely to support it unless it's one of the 120hz 3D vision displays.

 

[thilanliyan]

Originally posted by: Ev3nt H0riz0n
If that is the case there would be no way to tell (assuming the OSD is listing signal) but I originally did notice a difference when my monitor was at 60Hz when I got my 4850.

I think if you have vsync turned on and the game stays at 60fps (viewed through something like fraps, etc.) then you have a 60Hz monitor. If it's at 75fps then it's a 75Hz monitor. Someone correct me if I'm wrong.

 

[Ev3nt H0riz0n]

If thats the case then I would have a 75Hz monitor since Source in with VSYNC enabled caps at 75FPS. I doubt that proves anything though since it could still accept the signal.

 

[bunnyfubbles]

Originally posted by: Azn
Some LCD's do support 75htz though.

often times they'll "support" it, but they'll ultimately update no faster than 60 times per second

Originally posted by: thilan29

Originally posted by: Ev3nt H0riz0n
If that is the case there would be no way to tell (assuming the OSD is listing signal) but I originally did notice a difference when my monitor was at 60Hz when I got my 4850.

I think if you have vsync turned on and the game stays at 60fps (viewed through something like fraps, etc.) then you have a 60Hz monitor. If it's at 75fps then it's a 75Hz monitor. Someone correct me if I'm wrong.

That wouldn't be the finality of it...your hardware can still process 75fps and then be "capped" at that due to the 75Hz vsync the monitor "supports" yet the monitor can still end up only displaying 60 of those 75 frames it receives from the hardware. As DaveSimmons was expressing, there can be a big difference between accepting a signal and actually displaying it.

 

[AzN]

Originally posted by: Ev3nt H0riz0n
Well I can force it to 75Hz at 1680 which as you stated is not supported but if the monitor does in fact ignore 15frames then why would any 75Hz resolutions be officially supported? It would suck if the 75Hz settings are there so the company can boast that the monitor can do 75Hz even though it just takes away 15frames. If that is the case there would be no way to tell (assuming the OSD is listing signal) but I originally did notice a difference when my monitor was at 60Hz when I got my 4850.

I wouldn't force it as this will kill the monitor sooner or later.

 

[AzN]

Originally posted by: thilan29

Originally posted by: Ev3nt H0riz0n
If that is the case there would be no way to tell (assuming the OSD is listing signal) but I originally did notice a difference when my monitor was at 60Hz when I got my 4850.

I think if you have vsync turned on and the game stays at 60fps (viewed through something like fraps, etc.) then you have a 60Hz monitor. If it's at 75fps then it's a 75Hz monitor. Someone correct me if I'm wrong.

I had a 19" Viewsonic LCD that could also hit the 75htz and display 75fps even if Vsync was on. Of course that monitor started to go crazy after 2 years.

 

[lopri]

Has anyone tried 120Hz monitors for 1080p/24 playback via DXVA? Preferably with a low-end GPU (on-board GPUs even better). I'd like to know how 2:3 pulldown works out with 120Hz LCDs.

Edit: Realized that my post was off-topic. Feel free to ignore plz.