MSI X99S MPower Motherboard Review

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Results: Benchmarks, Efficiency And Overclocking

Retained hardware and software settings from our previous reviews allows me to compare the performance of every tested X99 motherboard to the most recent products. As with the recently-tested Asus and ASRock motherboards, MSI’s X99S MPower gets the slight overclocking advantage of newer firmware without any changes in baseline performance.

3DMark and PCMark

Motherboard manufacturers used to win benchmarks by sneaking in an overclock. But Intel’s component integration prevents most of those hijinks apart from something called enhanced Turbo Boost modes. Disabling those allows a true apples-to-apples comparison, where nearly every product produces nearly identical scores in 3DMark and PCMark.

SiSoftware Sandra

We see an apparent progression in Sandra Multimedia, but it’s really small and completely unexplainable. All three of these motherboard fall within the performance range of previously-tested X99 models.

3D Games

The X99S MPower takes an insignificant lead in Grid 2, while the previously-tested Asus model wins Arma 3. On average, all three boards look…average.

Encoding, Creativity, Productivity And File Compression

Lower is better in timed applications, and all three boards look roughly equal across the suite. At least we didn’t have to spend a bunch of time tracking down some underhanded covert overclock. We like to control our hardware.

Power, Heat, And Efficiency

MSI’s X99S MPower draws slightly less power at full load compared to Asus’ X99 Pro. But both fall to ASRock's X99 Extreme6/ac in energy conservation. Relative power, performance and efficiency compare each product's individual score to every X99 motherboard reviewed to date, and that’s where MSI’s X99S MPower’s 0.2% better-than-average performance slightly offsets its 1.2% worse-than-average power consumption to give it a 1% worse-than-average efficiency rating.

Swipe to scroll horizontally
BIOS Frequency and Voltage settings (for overclocking)
Row 0 - Cell 0 MSI X99S MPowerASRock X99 Extreme6/acAsus X99 Pro
BIOSV22.3 (11/25/2014)1.40 (11/11/2014)1004 (10/16/2014)
Base Clock91-300MHz (0.05MHz)96-300MHz (0.1MHz)80-300MHz (0.1MHz)
CPU Multiplier12-80x (1x)12-120x (1x)12-80x (1x)
DRAM Data Rates1333-2666, 3200MT/s800-2666 (200/266.6MT/s)1200-4000 (200/266.6MT/s)
CPU Vcore0.80-2.10V (1mV)0.80-2.00V (1mV)0.001-1.92V (1mV)
VCCIN1.20-3.04V (1mV)1.20-2.30V (10mV)0.80-2.70V (1mV)
PCH Voltage0.70-2.32V (10mV)0.90-1.50V (25mV)0.70-1.80V (6.25mV)
DRAM Voltage0.60-2.00V (10mV)1.00-1.80V (10mV)0.80-1.90V (10mV)
CAS Latency4-31 Cycles4-31 Cycles1-31 Cycles
tRCD4-31 Cycles5-31 Cycles1-31 Cycles
tRP4-31 Cycles5-31 Cycles1-31 Cycles
tRAS9-63 Cycles10-63 Cycles1-63 Cycles

Intel’s validated memory ratios top out at 10x, corresponding to DDR4-2000 and DDR4-2666 data rates, depending on the memory controller to CPU core ratio. Asus was first to expose non-validated ratios exceeding 10x, and we found that the 12x ratio worked fairly well, while the 11x ratio didn’t. MSI must have reached the same finding, jumping past the 11x ratio and adding only 12x to its options. The result is that the X99S MPower supports DDR4-3200 at 12x 100MHz x 4/3.

The problem is, we couldn’t reach DDR4-3200. Using the DDR4-3200 setting, we had to underclock BCLK to 98MHz before our DDR4-3000 memory was stable. Going at it from the other direction by using the CPU’s 1.25x BCLK strap to start at 125MHz BCLK, we still had to clock down to 124MHz to reach a stable memory overclock of 2976. Of course, 3136MT/s is greater than 2976, but both of these top settings require other parts of the system to be down-clocked. For optimal CPU performance, we’d be better off starting from DDR4-2666 and working our way up using BCLK.


The integrated memory controller of Intel's Haswell-E-based processors operates at a ratio of either 1:1 or 4:3 compared to the CPU base clock. Because DDR memory transfers data twice per clock, the corresponding data rates occur in both 200 and 266MHz increments at 100MHz BCLK.

Thomas Soderstrom
Thomas Soderstrom is a Senior Staff Editor at Tom's Hardware US. He tests and reviews cases, cooling, memory and motherboards.
  • dovah-chan
    Have you guys gotten a sample of the X99S SLI Plus? I'm pretty interested in it because of its matte black scheme. Also it's a nicely priced board (for 2011-3 standards) that has guaranteed support for Xeons and ECC RAM.

    Maybe a throw down between it and Asus's X99-E WS for what board takes the workstation crown?
  • Crashman
    Yes, the SLI Plus arrived late for the roundup that included the Gaming 7. Since the Gaming 7 had arrived on time, the substitute model is still sitting in the intake bin :)
  • ElHarry
    PCIe 3.0 switches are not really minor components. They may not be very exciting, but they are a pain in the as to work with.
  • Wizard5678
    I like these motherboards and I have enjoyed your site content. Where else can someone source these items?
  • Wizard5678
    There is another source here:
  • Crashman
    15211412 said:
    PCIe 3.0 switches are not really minor components. They may not be very exciting, but they are a pain in the as to work with.
    They're inexpensive (the ones that don't have logic) and available on cheap Z97 motherboards, so one would think that implementing them on an X99 board (rather than shutting things off) would be a priority.

  • Ctsephion
    Am I the only one that thinks they're capitalizing on the Metro series' font type?
  • RedJaron
    I've thought that a few times as well.
  • d3stroyah
    mobo reviews are so ones for ram modules..
  • RedJaron
    15237958 said:
    mobo reviews are so ones for ram modules..
    Why do you say that?