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ASUS Sabertooth X99 Review


Asus Sabertooth X99 Testing:

LAN performance will be tested via a utility to gauge the performance of the onboard network solutions. The motherboard being tested will be connected via a Gigabit switch to another system with an integrated Gigabit network solution on board.

iPerf is a small lightweight utility run from the command prompt and can be used to measure both TCP and UDP performance on a network. iPerf is cross-platform software and open source. The test is configured to run for 20 seconds with a window size of 256 KB and four simultaneous streams that should be able to saturate the TCP link on a good NIC.














RightMark Audio Analyzer 6.25 is used to test the sound solution on board each motherboard. Nothing beats a good set of ears and headphones, but this is a graphic representation of the capabilities of the installed hardware. Sampling mode is 24-bit 44kHz.

ASUS X99 Deluxe
ASUS Rampage IV Extreme
ASUSX99-A ASUS Rampage V Extreme ASUS X99 Sabertooth
Frequency Response dB
+0.39, -0.28
+0.44, +0.31
+0.47,+0.37 +0.18, -0.58 +.48,+0.12
Noise Level dBA
-99.5 -124.8 -99.4
Dynamic Range dBA
99.5 142.1 99.3
Total Harmonic distortion %
0..389 0.0013 0.398
Intermodulation distortion +noise
0..320 0.99 0.425
Stereo Crosstalk,db
-93.7 -97.5



Intermodulation distortion + noise (Swept Freq) %
0.252 0.0047 0.430
Frequency Response (Swept Sine), db
+0.0, -0.0
+0.1, -0.1
+0.1,-0.1 +0.1,-0.1 +0.1,-0.2








In iPerf, the Sabertooth X99 delivers LAN performance consistent with the other boards I have compared to. It fits neatly into the very narrow Mbits/s envelope. CPU usage is in the 3 to 5% range during my testing. One of the distinguishing features that ASUS brings to the table is the Turbo LAN software that lets the end user manage the network priority of software and games installed on the system. Sound testing shows that the Realtek ALC1150 codec delivers benchmarks very close to those of the other boards in the comparison. Where it lost ground was in the distortion tests. Even so that loss was not evident when I did my testing.

Through watching a Blu-ray copy of Iron Man 3 and one of my go-to movies, The Hobbit, you can easily enjoy the audio content and pick out those small sounds that enhance the viewing of the movie. Launching into a few FPS games allows you to enjoy the sounds of the game with the punch you need, as well as the subtle foot steps behind you before you get clipped! Using ASUS' specific designs to seperate the analog and digital layers, and even the left to right signals, you get a really clear audio solution that, like its predecessors, makes a discrete audio card a thing of the past for most of us.

  1. ASUS Sabertooth X99: Introduction & Closer Look
  2. ASUS Sabertooth X99 Closer Look: The Board
  3. ASUS Sabertooth X99 Closer Look: Programs & Utilities
  4. ASUS Sabertooth X99 Closer Look: Programs & Tools Continued
  5. ASUS Sabertooth X99 Closer Look: The BIOS
  6. ASUS Sabertooth X99: Specifications & Features
  7. ASUS Sabertooth X99 Testing: Setup & Overclocking
  8. ASUS Sabertooth X99 Testing: PCMark 8, SiSoft Sandra
  9. ASUS Sabertooth X99 Testing: Cinebench R15, X.264, AIDA 64
  10. ASUS Sabertooth X99 Testing: Crystal Diskmark, Atto 2.47
  11. ASUS Sabertooth X99 Testing: iPerf, RMAA
  12. ASUS Sabertooth X99 Testing: Gaming
  13. ASUS Sabertooth X99 Testing: Conclusion
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