ATI Radeon HD 4870 X2 Performance Preview Page 2

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Test System Details

The test system detailed below was installed with Vista Ultimate Edition x64 SP1 and consisted of the following components:

• Intel E8500 Core 2 Duo (3.16GHz)
• ASUS Maximus Formula X38 chipset motherboard
• 4GB OCZ Reaper DDR2 1066 memory
• WD VelociRaptor 300GB hard drive
• Plextor PX-712S DVD drive
• Dell 3007WFP 30” LCD
• Corsair HX620W PSU

The X38 Express chipset supports dual x16 PCI Express 2.0 ports. The latest BIOS and chipset and add-in component drivers (Catalyst 8.8) were installed and all test applications patched. Anti-aliasing and anisotropic texture filtering were enabled whenever the test application allowed for control over those settings; otherwise, they were forced via the Catalyst control panel. All testing was conducted with 4x anti-aliasing and 16x anisotropic filtering enabled. FRAPS 2.9.4 was installed to record frame rates for applications that do not produce their own performance results. The following resolutions were used:

• 1280×1024
• 1680×1050
• 1920×1200
• 2560×1600

SimHQ used the following applications for our testing today and details per application configuration can be found in the test results section below:

• 3DMark Vantage
• IL-2: 1946
• Call of Duty 4
• Race Driver: GRID
• Silent Hunter: Wolves of the Pacific
• World in Conflict

The above titles were generally configured with high presets to help ensure the titles were as GPU intensive as possible. We no longer have a high-end NVIDIA board such as the GTX 280 available for testing, so we pitted the HD 4870 X2 against two separate HD 4870s to compare what, if any, performance differences would result from a single board CrossFire solution compared to two separate graphics boards with half the frame buffer. We also include test results from a single HD 4870 so readers can see how well these games scale in performance with AMD’s multi-GPU products.
Again, 4x AA and 16x AF were enabled as baselines for all testing.

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