Intel Core i5 655K

6 12 2010

Intel has brought its new K-series, two mid-range CPUs that aren’t priced at Extreme Edition levels – the i5-655K and the i7-875K. An unlocked multiplier provides more options when over clocking, as it’s the relationship between the multiplier and the Base Clock of the motherboard that rules over the CPU speed. Therefore, a CPU with an unlocked multiplier can be over clocked by increasing the Base Clock, the multiplier or a blending of both. This can be an advantage over just over clocking the Base Clock, as your motherboard will no longer be a limiting factor in over clocking efforts.

Core i5-665K released a 3.2GHz dual-core CPU for the LGA1156 socket. The new CPU is based on the i5-650. Both have 4MB of L3 cache and a TDP of 73W, and both hold up Hyper-Threading and the outstanding Turbo Boost (rev 2). GPU of the two chips are also clocked at the same 733MHz. In fact the only substantial disparity between the i5-655K and the i5-650 is the formers unlocked multiplier and the £33 price premium one pay for it over the i5-650.


Status Launched
Launch Date Q2’10
Processor Number i5-655K
# of Cores 2
# of Threads 4
Clock Speed 3.2 GHz
Max Turbo Frequency 3.46 GHz
Intel® Smart Cache 4 MB
Bus/Core Ratio 24
DMI 2.5 GT/s
Instruction Set 64-bit
Instruction Set Extensions SSE4.2
Embedded Options Available No
Supplemental SKU No
Lithography 32 nm
Max TDP 73 W
VID Voltage Range 0.6500V-1.4000V
Tray 1ku Budgetary Price $216.00


Memory Specifications  
Max Memory Size
(dependent on memory type)
16 GB  
Memory Types DDR3-1066/1333  
# of Memory Channels 2  
Max Memory Bandwidth 21 GB/s  
Physical Address Extensions 36-bit  

Graphics Specifications

Integrated Graphics Yes
Intel® HD Graphics Yes
Graphics Base Frequency 733 MHz
Intel® Flexible Display Interface (Intel® FDI) Yes
Intel® Clear Video HD Technology Yes
Dual Display Capable Yes


Expansion Options
PCI Express Revision 2.0
PCI Express Configurations 1×16, 2×8
# of PCI Express Ports 1
Package Specifications


Package Specifications
Max CPU Configuration 1
TCASE 72.6°C
Package Size 37.5mm x 37.5mm
Processing Die Size 81 mm2
# of Processing Die Transistors 382 million
Graphics and IMC Lithography 45 nm
Graphics and IMC Die Size 114 mm2
# of Graphics and IMC Die Transistors 177 million
Sockets Supported FCLGA1156
Halogen Free Options Available Yes


Advanced Technologies
Intel® Turbo Boost Technology Yes
Intel® Hyper-Threading Technology Yes
Intel® Virtualization Technology (VT-x) Yes
Intel® Trusted Execution Technology No
AES New Instructions Yes
Intel® 64 Yes
Idle States Yes
Enhanced Intel SpeedStep® Technology Yes
Intel® Demand Based Switching No
Thermal Monitoring Technologies No
Execute Disable Bit Yes