by Rob Williams on February 9, 2009 in Processors
The benefits of a low-TDP processor are obvious, but a usual downside is also obvious: low clock speeds. Intel’s changing that thinking with their Core 2 Quad “S” series, which includes the Q9550S, Q9400S and also the Q8200S. Compared to their non-“S” variants, they draw less power and run cooler, all while retaining the performance they’ve become known for.
At Techgage, we strive to make sure our results are as accurate as possible. Our testing is rigorous and time-consuming, but we feel the effort is worth it. In an attempt to leave no question unanswered, this page contains not only our testbed specifications, but also a fully-detailed look at how we conduct our testing.
If there is a bit of information that we’ve omitted, or you wish to offer thoughts or suggest changes, please feel free to shoot us an e-mail or post in our forums.
The table below lists the hardware for our two current machines, which remain unchanged throughout all testing, with the exception of the processor. Each CPU used for the sake of comparison is also listed here, along with the BIOS version of the motherboard. In addition, each one of the URLs in this table can be clicked to view the respective review of that product, or if a review doesn’t exist, you will be led to the product on the manufacturer’s website.
Intel Core 2 Extreme QX9770 – Quad-Core, 3.20GHz, 1.30v
Intel Core 2 Quad Q9650
– Quad-Core, 3.00GHz, 1.30v (Sim)
Intel Core 2 Quad Q9550
– Quad-Core, 2.83GHz, 1.30v (Sim)
Intel Core 2 Quad Q9450
– Quad-Core, 2.66GHz, 1.30v (Sim)
Intel Core 2 Quad Q9400S
– Quad-Core, 2.66GHz, Auto Voltage
Intel Core 2 Quad Q9400
– Quad-Core, 2.66GHz, 1.30v
Intel Core 2 Quad Q8200S
– Quad-Core, 2.33GHz, Auto Voltage
Intel Core 2 Duo E8600
– Dual-Core, 3.33GHz, 1.30v
Intel Core 2 Duo E8500
– Dual-Core, 3.16GHz, 1.30v (Sim)
Intel Core 2 Duo E8400
– Dual-Core, 3.00GHz, 1.30v
Intel Core 2 Duo E8300
– Dual-Core, 2.83GHz, 1.30v (Sim)
Intel Core 2 Duo E8200
– Dual-Core, 2.66GHz, 1.30v (Sim)
Intel Core 2 Duo E7200
– Dual-Core, 2.53GHz, 1.30v
Intel Pentium Dual-Core E5200
– Dual-Core 2.50GHz, 1.30v
(Sim) represents models that were tested using a faster, but underclocked processor. For example, for the Q9550, we used the QX9770, since the specs are identical all-around, except for the clock speeds. Those were adjusted appropriately, effectively giving us a Q9550 to test with.
When preparing our testbeds for any type of performance testing, we follow these guidelines:
- No power-saving options are enabled in the motherboard’s BIOS.
- Internet is disabled.
- No Virus Scanner or Firewall is installed.
- The OS is kept clean; no scrap files are left in between runs.
- Hard drives affected are defragged with Diskeeper 2008 prior to a fresh benchmarking run.
- Machine has proper airflow and the room temperature is 80°F (27°C) or less.
Windows Vista Optimizations
- User Account Control (UAC) and screen saver are disabled.
- Windows Defender, Firewall, Security Center, Search, Sidebar and Updates are disabled.
To aide with the goal of keeping accurate and repeatable results, we alter certain services in Windows Vista from starting up at boot. This is due to the fact that these services have the tendency to start up in the background without notice, potentially causing slightly inaccurate results. Disabling “Windows Search” turns off the OS’ indexing which can at times utilize the hard drive and memory more than we’d like.
To help test out the real performance benefits of a given processor, we run a large collection of both real-world and synthetic benchmarks, including 3ds Max, Adobe Lightroom, TMPGEnc Xpress, Sandra 2009 and many more.
Our ultimate goal is always to find out which processor excels in a given scenario and why. Running all of the applications in our carefully-chosen suite can help better give us answers to those questions. Aside from application data, we also run three common games to see how performance scales there, including Call of Duty: World at War, Crysis Warhead and Half-Life 2: Episode Two.
In an attempt to offer “real-world” results, we do not utilize timedemos in any of our reviews. Each game in our test suite is benchmarked manually, with the minimum and average frames-per-second (FPS) captured with the help of FRAPS 2.9.8.
To deliver the best overall results, each title we use is exhaustively explored in order to find the best possible level in terms of intensiveness and replayability. Once a level is chosen, we play through repeatedly to find the best possible route and then in our official benchmarking, we stick to that route as close as possible. Since we are not robots and the game can throw in minor twists with each run, no run can be identical to the pixel.
Each game and setting combination is tested twice, and if there is a discrepancy between the initial results, the testing is repeated until we see results we are confident with.
The three games we currently use for our motherboard reviews are listed below, with direct screenshots of the game’s setting screens so you can see exactly how we configured the game, in case you’d like to replicate any of our runs.
Call of Duty: World at War
Half-Life 2: Episode Two