Do You Really Need More Than 6 GB Of RAM?

Test Settings

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Test System Configuration
CPUIntel Core i7 920 (2.66 GHz, 8.0 MB Cache) Overclocked to 3.20 GHz (BCLK 200)
CPU CoolerSwiftech Liquid Cooling: Apogee GTZ water block, MCP-655b pump, and 3x120 mm radiator
MotherboardAsus P6T Intel X58/ICH10R Chipset, LGA-1366
RAM3.0, 6.0, and 12.0 GB DDR3-1600 Triple-Channel Kits CAS 8-8-8-24 at 1.65 volts
GraphicsZotac GeForce GTX2 60 896 MB 576/999 MHz GPU/Shader, GDDR3-2484
Hard DriveWD VelociRaptor WD30000HLFS 0.3 TB, 10,000 RPM, 16 MB Cache
SoundIntegrated HD Audio
NetworkIntegrated Gigabit Networking
PowerCooler Master RS-850-EMBA ATX12V v2.2. EPS12V, 850W, 64AOptical
OpticalLG GGC-H20LK 6X Blu-ray/HD DVD-ROM, 16X DVD±R
Software
Operating SystemMicrosoft Windows Vista Ultimate x64 SP1
GrpahicsNvidia Forceware 182.08
ChipsetIntel INF 9.1.0.1007

Because we didn’t have a single brand of modules to represent all three test capacities, we were forced to use different brands to represent different sizes. Crucial Ballistix filled the 3 GB void with three 1 GB DDR3-1600 modules, while Kingston’s 2 GB DDR3-2000 modules were used in 6 GB and 12 GB configurations. In order to assure performance parity, memory timings were matched at 8-8-8-24 and 1N, and all available BIOS sub-timings were “locked” at those detected for the slowest (Crucial) modules.

We also updated several of our benchmarks to 64-bit compatible versions, ahead of the full-site transformation that’s scheduled to take place soon. Because today’s article preceded any unilateral agreement, further changes in the suite are likely to accompany future articles.

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Benchmark Configuration
3D Games
Call of Duty: World at WarPatch 1.1, FRAPS/saved game High Textures, No AA / No AF, vsync off Ultra Textures, 4x AA / Max AF, vsync off
CrysisPatch 1.2.1, DirectX 10, 64-bit executable, benchmark tool Test Set 1: High Quality, No AA Test Set 2: Very High Quality, 8x AA
Far Cry 2DirectX 10, Steam Version, in-game benchmark Test Set 1: High Quality, No AA Test Set 2: Ultra High Quality, 8x AA
World in ConflictPatch 1009, DirectX 10, timedemo Test 1: High Details, No AA / No AF Test 2: Very High Details 4x AA / 16x AF
Audio/Video Encoding
iTunes 8Version: 8.1.0.52 (x64) Audio CD "Terminator II SE," 53 min Default format AAC
LAME MP3Version: 3.98 64-bits (07-04-2008) Audio CD "Terminator II SE," 53 min wave to MP3
TMPEG 4.6Version: 4.6.3.268 Import File: Terminator 2 SE DVD (5 Minutes) Resolution: 720x576 (PAL) 16:9
DivX 6.8.5Encoding mode: Insane Quality Enhanced multithreading enabled using SSE4 Quarter-pixel search
Xvid 1.2.1Display encoding status = off
Mainconcept Reference 1.6.1MPEG2 to MPEG2 (H.264), MainConcept H.264/AVC Codec, 28 sec HDTV 1920x1080 (MPEG2), Audio: MPEG2 (44.1 kHz, 2 Channel, 16-Bit, 224 KB/s), Mode: PAL (25 FPS)
Productivity
Autodesk 3ds Max 2009Version: 11, Rendering Dragon Image at 1920x1080 (HDTV)
Grisoft AVG Anti-Virus 8Version: 8.0.134, Virus base: 270.4.5/1533, Benchmark: Scan 334 MB Folder of ZIP/RAR compressed files
WinRAR 3.80Version 3.80, WinZIP Commandline Version 3.0, Compression = Best, Dictionary = 4,096 KB, Benchmark: THG-Workload (334 MB)
WinZip 12Version 12.0, Compression = Best, Benchmark: THG-Workload (139 MB)
Synthetic Benchmarks and Settings
3DMark VantageVersion: 1.02, GPU and CPU scores
PCMark VantageVersion: 1.00, System, Memory, Hard Disk Drive benchmarks, Windows Media Player 10.00.00.3646
SiSoftware Sandra XII SP2Version 2008.5.14.24, CPU Test = CPU Arithmetic / Multimedia, Memory Test = Bandwidth Benchmark
Thomas Soderstrom is a Senior Staff Editor at Tom's Hardware US. He tests and reviews cases, cooling, memory and motherboards.