Monitor frequency problems

Sandbag01 · Post by **Sandbag01** » 09 Dec 2008, 07:25

Hi everyone,

There is a problem with my setup with 3 monitors connecting with a DTH2GO in a resolution setting of 5040x1050 57Hz. In this setup the 3 monitors has only 5040x1050 48Hz. Is this a software or hardware problem of either the videocard or the monitor?

Thanks in advance for helping me.

Harry

Operating system: HP m7700 E6600, Windows Vista 32, NVIDIA 8800GTX
3x HP W22" monitors.

yogibbear · Post by **yogibbear** » 09 Dec 2008, 07:38

How much ram do you have?

Sandbag01 · Post by **Sandbag01** » 09 Dec 2008, 17:48

How much ram do you have?

RAM is: 2046 MB

yogibbear · Post by **yogibbear** » 09 Dec 2008, 18:54

I remember seeing someone post somewhere on here about the frequency being tied to the vram.... and at higher resolutions (e.g. triplehead) you can exceed the vram required for that resolution and hence force a frequency issue....

^ now none of that makes sense to me as i always thought monitor frequency and gpu vram were completely independant systems... but i'll search around.

Edit: okay i searched... kinda quickly, but no luck... either it's all in my head, or i'm going crazy. :(

Sandbag01 · Post by **Sandbag01** » 10 Dec 2008, 06:48

I remember seeing someone post somewhere on here about the frequency being tied to the vram.... and at higher resolutions (e.g. triplehead) you can exceed the vram required for that resolution and hence force a frequency issue....

^ now none of that makes sense to me as i always thought monitor frequency and gpu vram were completely independant systems... but i'll search around.

Edit: okay i searched... kinda quickly, but no luck... either it's all in my head, or i'm going crazy. :(

Thanks so far! :)

Mesh · Post by **Mesh** » 10 Dec 2008, 20:07

I didn't find it either but what I think you're referring to is this:

You need X amount of ram to display 57 frames / sec at the TH res, so for example, 1680*1050*32bit color*57hz = 402192000 bytes / sec of vram required, or about 383mbytes, and that's not counting any AA or other image enhancementst that increase total per frame.

So it's likely with say 8x AA + 1680*1050*32bit color*57hz that you'd run out of vram on a 256mb gpu. Although it might be able to compensate by siphoning ram from the system, it'll be quite slower.

Sandbag01 · Post by **Sandbag01** » 10 Dec 2008, 20:21

I didn't find it either but what I think you're referring to is this:

You need X amount of ram to display 57 frames / sec at the TH res, so for example, 1680*1050*32bit color*57hz = 402192000 bytes / sec of vram required, or about 383mbytes, and that's not counting any AA or other image enhancementst that increase total per frame.

So it's likely with say 8x AA + 1680*1050*32bit color*57hz that you'd run out of vram on a 256mb gpu. Although it might be able to compensate by siphoning ram from the system, it'll be quite slower.

Thanks for your help and will try.

Harry

Widescreen Gaming Forum