A Question about ATi Drivers - Page 2

Adrian Wong · 5th Jun 2007, 02:56 AM

Actually, it has nothing to do with the RAMDAC. He's using an LCD monitor. Refresh rates do not apply to LCDs. That's why they are all set to 60Hz.

There's nothing wrong with 60Hz on an LCD monitor. The only reason why we want a higher refresh rate on CRTs is to reduce or eliminate flickering. But pixels on LCDs only change when they need to. So, no flickering even at 60Hz.

Chai · 5th Jun 2007, 08:31 AM

Oops, I didn't see him mentioning LCD. Sorry.

Adrian Wong · 5th Jun 2007, 03:25 PM

Quote:

Originally Posted by Chai

Oops, I didn't see him mentioning LCD. Sorry.

He didn't. But I don't think you can get a CRT with a resolution of 1920x1080.

Grogan · 19th Jul 2007, 07:01 AM

It's just the concept of vertical sync in games or video applications... that's the only reason I know of that you can even change the refresh rate on LCD displays. Depending on your LCD, you may be able to achieve higher refresh rates at lower resolution or even in analog mode (I have an Acer LCD like that on one computer). It really depends on if they support the bandwidth to do it.

For example if you have "sync every frame" or "wait for vertical sync" enabled in a game, and your LCD is doing 60 Hz, that would limit your FPS to 60 fps. Disable that option in game, or in the driver if that's not possible (e.g. force it to disabled in the Nvidia or ATI control centers) and it's a non issue. You'd otherwise not see a difference.

5th Jun 2007, 02:56 AM	#11 (permalink)
Adrian Wong Da Boss Join Date: 10 Oct 2002 Location: In front of my BenQ Joybook 7000 notebook! Posts: 29,961 Reputation: 2958 Rep Power: 65	Actually, it has nothing to do with the RAMDAC. He's using an LCD monitor. Refresh rates do not apply to LCDs. That's why they are all set to 60Hz. There's nothing wrong with 60Hz on an LCD monitor. The only reason why we want a higher refresh rate on CRTs is to reduce or eliminate flickering. But pixels on LCDs only change when they need to. So, no flickering even at 60Hz. __________________ Dr. Adrian Wong Tech ARP \| Blog @ Tech ARP \| The Free Trade Zone DYKT : The only offshore account I have is at the sand bank? Keep Tech ARP free! Visit our sponsors! We need PROGRAMMERS and TECHNICAL WRITERS! Contact us if you are a hot shot programmer or technical writer! My items for sale : 50x SD Card \| Memory Stick PRO \| Cyclone Energy Saver \| Seiko SS watch \| Tiger/Carlsberg beer jugs \| Travel Speakers \| Motorola V600 \| Nokia N90 SOLD! \| New Lowepro Mini Trekker AW Other items for sale @ the FTZ : Zalman CNPS9500 LED @ $20 \| Zalman CNPS7700 Cu @ $20 \| Zalman CNPS7000 Cu @ $20 \| Swarovski bracelet watches \| Dell 17" LCD \| Hi-Fi speakers \| English DIVX movies \| HP LaserJet toners! \| Office chairs

5th Jun 2007, 08:31 AM	#12 (permalink)
Chai Administrator Join Date: 6 Oct 2002 Location: Maranello Posts: 26,669 Reputation: 3984 Rep Power: 72	Oops, I didn't see him mentioning LCD. Sorry. __________________ Chai (Contributor & Forum Admin) http://www.techarp.com/

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19th Jul 2007, 07:01 AM	#14 (permalink)
Grogan Newbie Join Date: 19 Jul 2007 Posts: 9 Reputation: 0 Rep Power: 0	It's just the concept of vertical sync in games or video applications... that's the only reason I know of that you can even change the refresh rate on LCD displays. Depending on your LCD, you may be able to achieve higher refresh rates at lower resolution or even in analog mode (I have an Acer LCD like that on one computer). It really depends on if they support the bandwidth to do it. For example if you have "sync every frame" or "wait for vertical sync" enabled in a game, and your LCD is doing 60 Hz, that would limit your FPS to 60 fps. Disable that option in game, or in the driver if that's not possible (e.g. force it to disabled in the Nvidia or ATI control centers) and it's a non issue. You'd otherwise not see a difference.