Just for giggles I ran a 30 game blitz (3/2) match pitting Strelka 6 against Komodo 8. Thirty games is statistically insignificant but my results do suggest there's something wrong with the OP's configuration. Komodo 8 won the match with 10 wins, 18 draws and two losses.
I tried something similar, but because I don't have Komodo 8, I had to go through the back door.
I made a statistically insignificant 50-game match with Strelka 6 against Stockfish 5 (40/4 time control, each engine using only one thread). Stockfish won with 20 wins, 20 draws, and 10 losses (+70 elo).
Now, the CCRL 40/4 rating list has Stockfish 5 64-bit at 3241 elo. Therefore, Strelka 6 would be at 3241 - 70 = 3171 elo. Since the same rating list has Komodo 8 64-bit at 3215 elo, then I could expect Komodo 8 to be about 44 elo stronger than Strelka 6. (More or less - give or take - rough ballpark guess, due to the small number of games.)
Do any of you know if Komodo 9 is coming out soon? Or Houdini 5? Also, how strong is Samsung, Equinox 3.3 or Stockfish Barracuda?
I wouldn't look for Houdini 5 this year and it's possible Houdart has abandoned the project. That's the consensus opinion, anyway.
The Komodo team has not made any announcements (that I'm aware of) but they have a development version leading the TCEC tournament. I therefore wouldn't be surprised to see a new Komodo release in the very near future.
Equinox appears to be quite strong, number 5 on this list ---->>
http://www.computerchess.org.uk/ccrl/4040/