Intel’s software bundle is unchanged from our previous review, and even its hard-to-find Extreme Tuning Utility remains without update. We took a few screenshots to be certain, but, with nothing new to discuss, we can instead refer you to our last round-up for more information about Intel's bundled software.
The DZ77RE-75K’s firmware-based overclocking menu also appears unchanged from less expensive board we reviewed previously, though a change in hardware does trigger different overclocking results. A 101 MHz base clock and 46x multiplier give us 4.64 GHz at 1.25 V.
It appears that everyone is fudging the numbers when it comes to voltage these days, displaying lower voltages in the firmware than our meters show at the pins, and Intel's DZ77RE-75K sets a particularly egregious example for the CPU core. To begin with, High V-droop mode is supposed to allow voltage to sag under CPU load, but this board caused the CPU’s voltage to climb under load. Setting Low V-droop caused the CPU voltage to climb even more under load. The only way we could get the CPU to 1.25 V was to choose 1.19 V as the baseline and watch the voltage climb.
The DZ77RE-75K doesn’t let you fine-tune memory from XMP mode, but the board does retain previously-set timings when entering manual mode. Entering Manual mode from Auto makes SPD values your baseline, while entering Manual from XMP mode makes those timings stick as well. Because of that, we were able to start our DRAM overclocking effort without manually configuring primary, secondary, and tertiary controls.
The big difference between memory overclocking on the Intel and ECS boards was the set voltage. While ECS reported 1.632 V for our 1.65 V reading, we had to set the DZ77RE-75K to 1.687 V to reach an actual 1.65 V on our meter. That makes Intel the only company in today’s comparison that isn’t under-reporting DIMM voltage.
- Intel's Mainstream Z77 Express Goes High-End
- Panther Point's Thunderbolt Connection
- ASRock Z77 OC Formula
- Z77 OC Formula Software
- Z77 OC Formula Firmware
- Asus Sabertooth Z77
- Sabertooth Z77 Software
- Sabertooth Z77 Firmware
- ECS "Golden Board" Z77H2-AX
- Z77H2-AX Software
- Z77H2-AX Firmware
- Gigabyte GA-Z77X-UP5 TH
- GA-Z77X-UP5 TH Software
- GA-Z77X-UP5 TH Firmware
- Intel DZ77RE-75K
- DZ77RE-75K Software And Firmware
- MSI Z77A-GD80
- Z77A-GD80 Software
- Z77A-GD80 Firmware
- Test Settings And Compatibility
- Benchmark Results: 3DMark 11
- Benchmark Results: PCMark And SiSoftware Sandra
- Power And Heat
- Picking The Right High-End Z77 Board