Techgage - Intel Core 2 Extreme QX6850 Quad-Core

Date: July 16, 2007
Author(s): Rob Williams

Intel today is announcing their 1333FSB Core 2 line-up, which consists of three dual-cores, including the E6750 we previewed a few weeks ago, and also the 3.0GHz quad-core that we are testing out today. Read on as we explore all of what Intel's latest flagship processor has to offer.

Testing Methodology

Over the past month, we have re-evaluated our CPU benchmarking suite and have now put it into place. This review will have a variety of new benchmarks, while retaining a few of the more important ones. Starting with this review, our testing methodology page will feature all the information you need, to better understand how we conduct our testing.

By no means is our suite perfect, and we are constantly evaluating benchmarks to add, or replace. We always welcome any suggestions of what you'd like to see included.

Regardless of the OS we are running, there are a few conditions that need to be met:

Desktop and scrap files are cleaned up, including emptying of recycle bin/trash.
No virus scanner or firewall is installed in our stand-alone installations.
Internet is completely disabled prior to any testing.
Computer has proper airflow and room temperature is 80°F or less.

Here is the machine used for testing, followed by our operating systems configurations.

Processor: Intel Core 2 Extreme QX6850 3.0GHz

Compared Processors

Intel Core 2 Duo E6600 2.40GHz
Intel Core 2 Duo E6750 2.66GHz
Intel Core 2 Quad Q6600 2.40GHz

Motherboard: ASUS P5K3 Deluxe WiFi-AP
Memory: OCZ 2GB Platinum DDR3-1333 (7-7-7-20, 1.7v)
Video: ASUS 8800GTX 768MB (NVIDIA 158.22)
Sound: Onboard HD Audio
Storage: Seagate 7200.9 320GB
Etcetera: Windows XP Professional SP2, Windows Vista Ultimate, Fedora 7 x86
Cooling: Corsair Nautilus 500
* 1066FSB processors are run with DDR3-1066 6-6-6-15 1.6v

Operating Systems

For our CPU reviews, we use two different versions of Windows and one version of Linux. Even though Vista has been out for half a year now, we focus on XP because it has a much wider user base, and is preferred for the best performance and compatibility. Vista is used only for our SYSmark 2007 Preview suite.

Windows XP Professional SP2

Screensaver and all power-related options are disabled.
All chipset/motherboard drivers are installed, in addition to GPU.
Windows Update is called in if a specific update is needed.
Internet is disabled.

Windows Vista Ultimate

Screensaver and all power-related options are disabled.
Welcome Center is disabled.
UAC is disabled.
Critical Windows Updates are downloaded, including a fix for the GPU.
Security Center is altered to never nag about the settings.
Internet is disabled, and Aero theme is enabled.

Fedora 7 x86

During installation, Firewall and SELinux are disabled.
GCC 4.1.2, Flex and Bison are installed.
Internet is disabled.

Game Benchmarking

Game benchmarking is an important part of testing the capabilities of a CPU, and for this review we've included five popular titles: Half-Life 2, NFS: Carbon, Prey, STALKER and Supreme Commander. Average FPS is captured using FRAPS 2.8.2, except for Prey, which is our only non-manual game.

Half-Life, Prey and Stalker are played at 1600x1200 with 4xAA, Half-Life being the only one with bumped AF. NFS: Carbon is also run on 1600x1200 with high detail settings, but all advanced video options are left at default.

Supreme Commander is the only game run at 1920x1200 with all options maxed alongside an 8xAA. This is because the game is multi-core compatible, and we wanted to see if the game would benefit from a quad-core in a realistic scenario.

Each game play through lasts between 3 and 5 minutes, except Supreme Commander which lasts closer to 8. All run-throughs are manually played, except for Prey which uses a time demo, in order to break through the 60FPS hard-limit. Results are captured using FRAPS 2.82.