AGP x4/x8 Performance hit?

[koondrad]

Hi,

When you use an AGP x8 Graphics Card in an AGP x4 slot on your mobo, how much of a performance hit is there? Anyone got any links to benchmarks, etc?


Thanks in advance,

 

[Ennui]

I'm a noob about these things, but won't that like, not work?

 

[Razor]

I'm a noob about these things, but won't that like, not work?

In some, it might not work, it just depends if the agp port can supply the correct amount of power to the board or not, it should do though.

The performance hit of using an agp8x card in agp4x mode though would be very, very minimal, in 3dmark, you would be looking at possibly 100 - 200 points i.e. just a couple of frames per second in games.

 

[Fletch]

Staying on topic-ish - what should the AGP aperture be set to in relation to the graphics cards memory? 256mb in my case. Should it be the same amount twice as much etc, what are the effects? any useful links?

 

[Razor]

Staying on topic-ish - what should the AGP aperture be set to in relation to the graphics cards memory? 256mb in my case. Should it be the same amount twice as much etc, what are the effects? any useful links?

The apperture doesn't mean much at all with modern day graphics cards, but i set mine too the same as the graphics card memory.

 

[koondrad]

In some, it might not work, it just depends if the agp port can supply the correct amount of power to the board or not, it should do though.

It works for me. :cheers:

The performance hit of using an agp8x card in agp4x mode though would be very, very minimal, in 3dmark, you would be looking at possibly 100 - 200 points i.e. just a couple of frames per second in games.

Glad to hear it. :cheers:


Thanks for the help.

 

[holydeadpenguins]

I set my aperature to 32, i find that with that i get the best performance.

 

[koondrad]

what's apperture in terms of PCs?

 

[Razor]

what's apperture in terms of PCs?

The agp apperture size is the amount of system ram that the cpu allows the graphics card to steal when the graphics card runs out of onboard memory. When you now have graphics cards with 128megs of ram as a minimum, the apperture isn't really important anymore.

 

[duffers20]

The agp apperture size is the amount of system ram that the cpu allows the graphics card to steal when the graphics card runs out of onboard memory. When you now have graphics cards with 128megs of ram as a minimum, the apperture isn't really important anymore.

Thanks for the information there, I didn't know that! I just set mine as 128 because I thought that it was somehow related to the amount of onboard ram on my gfx card.

 

[Fletch]

The agp apperture size is the amount of system ram that the cpu allows the graphics card to steal when the graphics card runs out of onboard memory. When you now have graphics cards with 128megs of ram as a minimum, the apperture isn't really important anymore.

Thanks for the heads up

 

[Asus]

64MB or 128MB are what most boards have them set by default for apeture. I just leave this setting alone because it provides no benefit to increase it.