All performance tests were run on the following test platform:
- Intel DP67BG mainboard (LGA1155, Intel P67 Express rev. B3, BIOS version 1900);
- Intel Core i5-2500K CPU (3.3 GHz, Sandy Bridge, LGA1155);
- 2 x 2048 MB DDR3 SDRAM Patriot Extreme Performance Viper II Sector 5 Series PC3-16000, PVV34G2000LLKB (2000 MHz, 8-8-8-24 timings, 1.65 V voltage);
- MSI N570GTX-M2D12D5/OC graphics card (Nvidia GeForce GTX 570, GF110, 40 nm, 786/4200 MHz, 320-bit GDDR5 1280 MB);
- Kingston SSD Now V+ Series (SNVP325-S2, 128 GB);
- Cooling system:
- Scythe Mugen 2 Revision B (SCMG-2100) CPU cooler;
- Additional 80x80 mm fan for cooling of the area around the CPU socket during overclocking experiments;
- ARCTIC MX-2 thermal interface;
- CoolerMaster RealPower M850 PSU (RS-850-ESBA);
- Open testbed built using Antec Skeleton system case.
We used Microsoft Windows 7 Ultimate SP1 64 bit (Microsoft Windows, Version 6.1, Build 7601: Service Pack 1) operating system, Intel Chipset Software Installation Utility version 188.8.131.525, Nvidia GeForce/ION Driver 266.58 graphics card driver.
Operational and Overclocking Specifics
We didn’t have any problems with the assembly of our Intel DP67BG based system, except for the fact that all power supply cables were rotated by 180 degrees and so was the connector pad for the front panel buttons and indicators. We also had to adjust the processor fan settings in the mainboard BIOS, because it slowed down too much and the board started to worry about it. However, in this case everything will depend on the type of fan that you are using. Other than that, we didn’t have any problems, the OS installation went smoothly and everything worked fine. By default all processor power-saving technologies on the mainboard are enabled, but looks like all LGA1155 mainboards work that way anyway. It was with LGA1366/1156 mainboards that we had to enable all processor power saving technologies manually. I could also point out that more mainboards have drives working in AHCI mode by default, and Intel DP67BG is one of them.
As for system fine-tuning and overclocking, Intel has a special PDF document in English, which explains all the terms, the meaning of certain BIOS parameters and offers a few examples of proper overclocking. It is called Performance Tuning Guide. However, we did come across certain difficulties during overclocking: under heavy load the board lowered the processor clock frequency multiplier below the set value. However, we have already experienced this problem with Biostar TP67XE mainboard. Back then we learned that we needed to increase the “Power Limit” parameter in the BIOS to ensure that the CPU worked at the set frequency even under heavy load, although other mainboards will do it automatically. As a result, we managed to overclock our processors to the maximum frequency of 4.8 GHz.
Processor power-saving technologies continued working in idle mode: they lowered the CPU clock multiplier and core voltage.