We already knew that the previous build’s six-core processor and Hawaii-based graphics cards were energy hogs. But at least that machine idled down to reasonably low power consumption. My latest effort is even more miserly, though not to the degree I was expecting.
The chart below shows global power consumption, which includes losses inside the power supply. At 85% efficiency, the new system’s 802 W peak input power turns into 682 W of output for its Corsair HX750 power supply.

Noticing that the new machine draws 116 W less under full CPU load, our temperature chart might make a few readers do a double-take.

Both setups use the same CPU cooler, yet the current system's four-core CPU runs far hotter than the previous build’s six-core processor. The Haswell architecture's issues with heat are a glaring flaw in an otherwise excellent product.

Tom's Hardware readers who want a multi-purpose machine with an emphasis on gaming will be happy with the change to GeForce GTX 780 cards and a Core i7-4770K. Is the new build's advantage in games strong enough to counter the previous machine’s productivity lead, at least giving us a tie at stock clock rates?

Truth be told, one reason last quarter's box sunk to the new machine's performance levels at stock settings was that its workstation-oriented SATA driver sacrificed performance in the name of data integrity. After reverting back to Windows 8’s stock AHCI driver for its overclocked configuration, storage scores jumped by 15%. Thus, the new machine is not as strong as my combined scores would have us believe.
- Our High-End Build Evolves
- Graphics, CPU, And Memory
- Motherboard, Case, And Power
- CPU And Motherboard Cooling
- An Alphabet Soup Of Storage: SSD, HDD, And ODD
- Hardware Installation
- Overclocking
- Test Hardware And Benchmark Settings
- Results: 3DMark And PCMark
- Results: SiSoftware Sandra
- Results: Battlefield 4 And Far Cry 3
- Results: Grid 2 And Arma 3
- Results: Audio And Video Encoding
- Results: Adobe Creative Suite
- Results: Productivity
- Results: File Compression
- Power, Heat, And Efficiency
- A Gaming Build That Works Hard
1.) Start the system, wait for all processes to load, take a measurement (Active, but idle)
2.) Load the CPU using eight thread of AVX-optimized Prime95, take a reading (CPU Load).
3.) Load GPUs with 3DMark 11 Test 1 in loop, take max reading as it heats up (GPU Load).
4.) Load both applications (CPU+GPU Load).
The "math problem" is that any program used to fully load the GPU also partly loads the CPU. So when test 4 is Prime95+3DMark, Prime95 can only use whatever CPU resources are left with 3DMark running.
So the most accurate system power reading is with "CPU+GPU Load" applied. The system measurement for "CPU Load" still includes the power of an idle GPU. And the system power measurement for "GPU Load" still includes the amount of CPU energy it takes to run the GPU's test application.
Power supplies of greater capacity and similar reliability at this price tend to be lower-efficiency units. And we like efficiency too.
1.) Start the system, wait for all processes to load, take a measurement (Active, but idle)
2.) Load the CPU using eight thread of AVX-optimized Prime95, take a reading (CPU Load).
3.) Load GPUs with 3DMark 11 Test 1 in loop, take max reading as it heats up (GPU Load).
4.) Load both applications (CPU+GPU Load).
The "math problem" is that any program used to fully load the GPU also partly loads the CPU. So when test 4 is Prime95+3DMark, Prime95 can only use whatever CPU resources are left with 3DMark running.
So the most accurate system power reading is with "CPU+GPU Load" applied. The system measurement for "CPU Load" still includes the power of an idle GPU. And the system power measurement for "GPU Load" still includes the amount of CPU energy it takes to run the GPU's test application.
The "math problem" is that any program used to fully load the GPU also partly loads the CPU. So when test 3 is Prime95+3DMark, Prime95 can only use whatever CPU resources are left with 3DMark running.
So the most accurate system power reading is with "CPU+GPU Load" applied. The system measurement for "CPU Load" still includes the reading of an idle GPU. And the system power measurement for "GPU Load" still includes the amount of CPU power it takes to run the GPU.
Very much appreciated and satisfying answer.
Thanks Crashman
http://pcpartpicker.com/p/3fuGw
Wondering how much of a difference would non-reference cards make. Obviously, CPU cooler and RAM could be different, BR drive optional, storage drive as well.
Shouldn't that be DDR3-1866?
my fix is get a 700gb ssd, 780ti no sli problems, and a i5 4670, this is a much better gaming pc, and can go quiet build.