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ATI 4870 Slow Dual Display


vash82
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As the title says when I have dual displays running (extended and different resolutions) everything seems to run slower (expose, dashboard) not too sure how its effecting the overall speed of applications and games.

 

I did however run OpenGLExtensionsviewer and got basically the same results with dual displays enabled and disabled.

 

Other notes..

OS X Leopard 10.5.7

6 GB RAM

i7 920 overclocked to 3.8 or 4.0ghz (can't remember)

 

ATI Radeon HD 4870:

 

Chipset Model: ATI Radeon HD 4870

Type: Display

Bus: PCIe

Slot: Slot-1

PCIe Lane Width: x16

VRAM (Total): 1024 MB

Vendor: ATI (0x1002)

Device ID: 0x9440

Revision ID: 0x0000

ROM Revision: 113-B7710C-176

EFI Driver Version: 01.00.318

Displays:

DELL 2408WFP:

Resolution: 1920 x 1200 @ 60 Hz

Depth: 32-Bit Color

Core Image: Hardware Accelerated

Main Display: Yes

Mirror: Off

Online: Yes

Quartz Extreme: Supported

Rotation: Supported

DELL 2007WFP:

Resolution: 1050 x 1680 @ 60 Hz

Depth: 32-Bit Color

Core Image: Hardware Accelerated

Mirror: Off

Online: Yes

Quartz Extreme: Supported

Rotation: 90

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