◆ Test Platform

Test platform
Hardware platform
CPU	Core i7 2600K (3.4GHz) Core i7 875K (3.4GHz)
Motherboard	Intel P67 Intel P55
Memory	Two 2GB DDR3 1333
HDD	Seagate Barracuda 7200.10 320GB
VGA Card	GTX 580
Audio	integrated
Cooler	PCCooler HP-1204X
Power	CoolerMaster 500W
Operating system
OS	Windows 7 RTM 64bit
Drivers
MB Drivers	CD comes with drivers for the motherboard P67 Intel inf_9.1.1.1025 PV Edition
VGA Drivers	NVIDIA ForceWare 262.99 WHQL

◆ Test Description

The Sandy Bridge which we got default frequency is 2.8GHz, but because it is not locked multiplier, you can directly increase frequency to Core i7 2600K level, it is the most high-end processor of first wave Sandy Bridge processor, the core clock is 3.4 GHz.To keep the comparison under the same frequency, we have chosen Core i7 875K, Although the default frequency is only 2.93GHz,But it does not lock the multiplier,So we can adjust to 25 multiplier,the FSB frequency set to 136MHz, So the core clock also reaching 3.4GHz.

In order to fully show performance of Sandy Bridge,the test project is very comprehensive including scientific computing, image processing, 3D rendering, video encoding, file compressing / decompressing and 3D games.

BecauseSandy Bridge process has been upgraded to 32nm, while the Core i7 875K is still 45nm, power consumption change also will be point.

Processor Specifications
	Core i7 2600K	Core i7 875K
Basic Specifications Processor
Codename	Sandy Bridge	Lynnfield
Cores	4 (with Hyper-Threading)	4 (with Hyper-Threading)
Interface Type	LGA1155	LGA1156
Manufacturing Process	32nm	45nm
Default frequency	3.4GHz	2.93GHz
FSB	100	133
SHG	34.	22
Cache	4 × 64KB	4 × 64KB
Secondary cache	4 × 256KB	4 × 256KB
Three-level cache	8MB	8MB
Turbo Boost	Turbo Boost 2.0	Turbo Boost 1.0