Efficiency is where work meets power. This is all theoretical of course, since no physical work is being done by a CPU. It’s not like you use all those numbers to spin a wheel.
Since we’re calculating theoretical (rather than actual) efficiency, we need a baseline by which other products can be compared (or related, as shown in the title “Relative Efficiency” in the second chart). Since the lowest-performance PC and the lowest-energy PC are the same $600 unit, it becomes our baseline.

A peek at the raw data tells us where the wind will blow in the “Value” charts on the next page, since the double-priced $1200 machine is rarely twice as fast as the $600 system. But before we get there, we still have that long-discussed efficiency chart to discover.

Since efficiency can’t exceed 100%, the 100% baseline is subtracted from the chart above to make it zero. The resulting numbers are all relative, as in the $1600 PC achieves 18% more efficiency compared to the $600 PC.
Increased frequencies and voltages drive down the efficiency of all three overclocked machines, whereas a lesser overclock at stock voltage might have caused efficiency to climb by allowing more work to be accomplished with little additional energy.
- A SBM Based On Reader Feedback
- How We Tested Our Q2 2014 SBM Builds
- Results: 3DMark And PCMark
- Results: SiSoftware Sandra
- Results: Battlefield 4
- Results: Grid 2
- Results: Arma 3
- Results: Far Cry 3
- Results: Audio And Video Encoding
- Results: Adobe Creative Suite
- Results: Productivity
- Results: File Compression
- Results: Power And Heat
- Results: Overall Performance And Efficiency
- Our System Builder Marathon, By The Numbers
I got my two licenses for like, $20. Though I probably couldn't get any more like that, I don't need any more at the moment, thanks. If you don't want the OS, and you win my PC, just tell me and I'll keep it. Thanks!
Disposition should I be a fortunate winner:
1. Having not messed with a "new" Athlon, I might put a 92mm cooler on it and see what I can get out of it for a week or three. I'd almost certainly contribute a SSD to it, then most likely donate it to a startup I know of that actually is more in need of office-type PCs (but they do play some games).
2. If the motherboard were micro-ATX, I'd probably use most of these parts to upgrade / replace my Phoenix PC, as they represent a platform upgrade. It would be a substantial upgrade to my Omega PC, but I like the idea of maintaining that AM3+ system due to the overall quality of the parts in it. If the Apevia case surprises me due to its quality, I may use it anyway. One way or another, this would lead to another complete system donation though.
3. The parts in this one appear to be of sufficient quality / durability that I would probably end up forsaking the Omega PC for this one. I'd put its 990FX onto my test bench though to keep it around, and donate that one (MSI Z77A-GD65 Gaming) as above.
Id also want system build for NAS and UPS and things. If you want to put your swap file in your memory. Get a UPS and link it so if the power fails you computer will shut down correctly. I wish they would of put that in this article.
Power outage is a b+ch. I have not done this but i wish there would be an article on UPS's that work well and turn off everything orderly.
It would be good if we had load shedding and other particulars to make the reliability higher. Id like a solar system with load shedding
I really wish they make more articles on upgrades or recycling, that would coexist with these new builds. I believe most Tom viewers, correct me if I am wrong, are not new to computers. For instance, I had an aging OC'd i7930 x58 with triple channel memory, the mobo died after many years, but tracking down a x58 board new is impossible today. So I had about $300 at the time to spend on a new CPU/MOBO (Im saving up for X99 btw) and wanted to use my old DDR3 1600 memory, SSD , HD, video card, and case.... Now what would be a good recommendation for that scenario? I went the following specs on my signature... $270 + about $30 shipping to Hawaii... :|