|CPU:||Intel Core i5-3570K @ 4.6GHz 1.26V (linpack stable)|
ASUS P8Z77-I Deluxe (ITX) BIOS 0408
ASUS P8Z77-V Deluxe (ATX)
|Memory:||G.Skill RipJawsZ 2133MHz DDR3 16GB Kit|
|Power Supply:||Cooler Master Silent M Power 1000W|
OCZ Vertex 3 Max IOPS Edition 240GB (SATA)
Kingston V100+ 96GB (USB)
|Graphics Cards / Drivers:||
NVIDIA GeForce GTX 680 2GB
|Operating System:||Windows 7 SP1 with latest patches|
By just raising the CPU core voltage to 1.26v, we managed a 4.6GHz overclock out of our Core i5-3570K, which is above average for Ivy Bridge. We had no problems running the G.Skill RipJawsZ kit at its rated 2133MHz XMP 1.3 profile as well.
We didn't include another system for comparison – but the i5-3570K scores here are below average, implying that there could be a problem with the BIOS firmware (0408 from ASUS website) or CPU efficiency could have been compromised during the process of shrinking everything to fit (we did check that there was no throttling).
With reference to the memory results achieved in our P8Z77-V Deluxe review (ran at 3770K @ 4.8GHz), the two benchmarks above show that the ITX board (3570K @ 4.6GHz) is slightly behind by about 5%, which works out to be roughly identical or even ahead once the CPU frequencies are normalized. This is not surprising as the electrical traces from the CPU to the memory slots are shorter on the smaller board.
This is the same card in the GIGABYTE GTX 680 Windforce 3X 2GB review, overclocked to 1288/1552MHz. Then the SNB-E/Rampage IV Extreme combo we used got a Graphics Score of 3410, marginally lower than the 3464 here – very, VERY impressive considering that the R4E is one of the best PCIe tuned boards out there for benching, again probably to do with the shorter electrical traces on the P8Z77-I Deluxe.
USB 3.0 and SATA 3.0 Performance
Even with a slower CPU (ITX using 3570K @ 4.6GHz, ATX board using 3770K @ 4.8GHz), the P8Z77-I Deluxe trades paint with its larger ATX deluxe namesake. Fast running out of hyperboles to describe this board…
Windows Experience Index
DPC Latency is induced by faulty hardware or shoddy drivers/energy saving nonsense and causes audio/video drop-outs of real-time data like video streaming or FPS gaming. The P8Z77-I Deluxe showed no such hiccups while playing a 1080p Full HD YouTube video
CPU Load Line Calibration
Loadline calibration is the mitigation of voltage drops, which affects stability during overclocking. The ASUS P8Z77-I Deluxe handled it well – something that most ITX motherboards with cost-cut VRM designs struggle with. In this case we used the Ultra-High (75%) setting in the BIOS, which doesn't cause voltage to overshoot the desired value (1.26v) and kept the overclock stable