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Asus Maximus VIII Hero, Z170, Skylakes Hero!

Test Rig & OverClocking & CPU Thermal Readings

We went pretty standard with our tests, Windows 10 Pro, we turned off the Virus Scanner and the MalWare program, removed excess drives on the machine and just left the Crucial MX100 SSD so no indexing would take place, We emptied Prefetch and the cache between tests. When we did a cold startup of the machines we allowed 10 minutes for Windows housekeeping to finish and give us all the processor cycles it could. We didn’t close a lot of host services or strip down the OS turning things off to get better numbers, We left it at turning off the scanners, clearing the caches and prefetch and ran the tests just like you would on your machine at home. All of the Asus Utilities were installed but no excess programs. Just Windows 10 Pro fully updated, the Asus Drivers Disk and the Utilities that came with the Hero VIII.

We ran each Test 3 times and average those three runs to give you the scores we report here. Should we encounter a score that is inconsistent with the other two tests we trash it and go for a 4th benchmark run, no anomalous benchmarks are included here.

Test Rig
“Quadzilla”
Case Type
CPU Intel Core I7 6700K 4.0 – 4.2GHz
Motherboard
Ram
CPU Cooler EKWB L360 (EK-Kit L360)
Hard Drives
Optical Liteon DVD Burner
GPU Asus Strix R9 390X Gaming 8G OC
Case Fans 1 x 180mm Mosfet / CPU / Ram cooling fan
1 x 120mm PCI-E Cooling Fan
Docking Stations None
Testing PSU
Legacy None
Mouse
Keyboard
Any Attempt Copy This System Configuration May Lead to Bankruptcy

OverClocking The Asus Maximus VIII Hero

OCing

CPU_Z_System

Here’s our conglomerate CPU-Z System screenshot it verifies we are working with a Skylake 95W TDP Intel Core I7 6700K processor. This is of course pre-overclock with Speed Step and C-States still enabled so the core speed shows as 800Mhz, the processor multiplier tells the tale it runs from 8 – 42 and our true top end speed here is 4200MHz.

4700

We made 4700MHz easy peasy while CPU-Z is reading 1.472v that is not the core voltage we set in BIOS, we never set BIOS above 1.42v and for the most part we set BIOS to 1.4v and our Intel Core I7 6700 Processor ran fine at that speed and voltage. VCore isn’t the only voltage you need to bump. Increase Vcore, VCCIO and System agent and you’ll find your sweet OC. If you’re pushing the memory then you may need more System Agent voltage and 1.2v should be good for 3200MHz kits while 1.25 VCCIO should be good enough.

4700_Wprime_1024

Here we are at 4700MHz WPrime is at 99% and completed successfully and we benchmarked every benchmark in this review at a higher frequency than this.

4800

Here we are at 4800GHz with WPrime completing successfully and by this time we were at the recommended maximum voltage of 1.42V in BIOS.

4800_Realbench

For you doubters here’s a 4800MHz with the two CPU intensive sections of RealBench selected and it completed successfully without as much as a glitch.

Temperatures

Temps

For Thermal readings I loaded and run WPrime 1024  then read the thermal load, Skylake reaches its thermal limit pretty quick when highly OC’d. Cool the machine down for 30 minutes at an idle then read the Idle temperatures. I repeat that same process three times then average the three runs and report those scores. An eye is kept out for anomalous runs, if an anomaly occurs I shut the machine down let it cool off, reboot and rerun the test.

We were running a EKWB EK-Kit L360 which is a beginners triple radiator kit with a 3/8″ bore hose and a pump that pushes 400L an hour, it’s a pretty effective cooling system and Skylake pushed the Triple Radiator to its limit.

85c

We were at 4700MHz here using 1.4v and cores 1 and 2 hit 85°C slightly higher than we like our processors to run. We like a 80°C cutoff but we didn’t want to limit the OC on this new processor so we adjusted our expectation to 90°C for maximum OC purposes,

87c

This is at 4800MHz and 1.42v on the core, 1.2 on VCCIO and 1.2 on System agent. We found that leaving Speedstep and Turbo enabled made the processor a lot less cranky and since the ramp is minimal we ran our OC with the best of both worlds. The Intel Core i7 6700K CPU would drop to 800MHz idle then in the blink of an eye shot to 4.8GHz before we could even blink. Go hardcore and disable SpeedStep, C State and Turbo if you like but as responsive as this CPU is gains are minuscule.

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