Intel Core i5-655K (CM80616003174AO / BX80616I5655K)

CPU » Intel » Core i5 families » Core i5 » i5-655K

Specifications

Core i5-655K is the first desktop Core i5 microprocessor with unlocked clock multiplier. Built on enhanced Nehalem micro-architecture, this dual-core processor operates at 3.2 GHz, includes 4MB level 3 cache and supports AES instructions and streaming SIMD extensions up the SSE4. Two important performance enhancement features in this model are HyperThreading, which improves processor's performance in multi-threaded applications, and Turbo Boost technology, that temporary boosts performance by raising frequency of active cores.

Basic features of the Core i5-655K CPU are very similar to Core i5-650, but there are a few differences. The 655K model has unlocked clock multiplier, while the 650 model doesn't. Also, the i5-655K doesn't feature Virtualization for Directed I/O (VT-d) and Trusted Execution Technology. Like all current Core i5 microprocessors, the i5-655K is packaged in 1156-land LGA package compatible with socket 1156 motherboards. Boxed version of the i5-655K microprocessor uses updated design with large "UNLOCKED" text on the front of the box. Distinct from 6x0 boxed CPUs, the 655K box doesn't include a fan/heatsink. At launch the processor was priced at $216, or $40 more than the i5-650. According to first reviews, the microprocessor may be overclocked up to 4 GHz on air, and up to 4.5 GHz when water cooling is used.

General information

Type

CPU / Microprocessor

Market segment

Desktop

Family

Intel Core i5

Model number ?

i5-655K

CPU part numbers

CM80616003174AO is an OEM/tray microprocessor
BX80616I5655K is a boxed processor (English version)

Frequency ?

3200 MHz

Turbo frequency

3467 MHz (1 core)
3333 MHz (2 cores)

Package

1156-land Flip-Chip Land Grid Array (FC-LGA10)
1.48" x 1.48" (3.75 cm x 3.75 cm)

Socket

Socket 1156 (LGA1156)

Weight

0.9oz / 24.3g (CPU)
4.1oz / 117.3g (box)

Introduction date

June 1, 2010

End-of-Life date

Last order date is February 24, 2012
Last shipment date for OEM processors is August 10, 2012

Price at introduction

$216

S-spec numbers

	ES/QS processors	Production processors
Part number	Q4MA	SLBXL
BX80616I5655K		+
CM80616003174AO	+	+

Architecture / Microarchitecture

Microarchitecture

Nehalem (Westmere)

Processor core ?

Clarkdale

Core stepping ?

K0 (SLBXL)

CPUID

20655 (SLBXL)

Manufacturing process

0.032 micron
382 million transistors (CPU die)
177 million transistors (IMC / graphics die)

Die size

81mm² (CPU die)
114mm² (IMC / graphics die)

Data width

64 bit

The number of cores

The number of threads

Floating Point Unit

Integrated

Level 1 cache size ?

2 x 32 KB instruction caches
2 x 32 KB data caches

Level 2 cache size ?

2 x 256 KB

Level 3 cache size

4 MB shared cache

Cache latency

4 (L1 cache)
10 (L2 cache)
39 (L3 cache)

Multiprocessing

Uniprocessor

Features

MMX instruction set
SSE
SSE2
SSE3
Supplemental SSE3
SSE4.1 ?
SSE4.2 ?
AES instructions
EM64T technology ?
Virtualization technology (VT-x) ?
Execute Disable bit ?
Turbo Boost technology ?
Hyper-Threading technology ?

Low power features

Thread C1, C3 and C6 states
Core C1/C1E, C3 and C6 states
Package C1/C1E, C3 and C6 states
Enhanced SpeedStep technology ?

On-chip peripherals

Integrated dual-channel DDR3 SDRAM Memory controller
Direct Media Interface
Integrated HD graphics controller

Electrical/Thermal parameters

Thermal Design Power ?

73 Watt

Notes on Intel CM80616003174AO

Integrated graphics processor (IGP) runs at 733 MHz
Graphics processor and memory controller are located on a separate die, which is manufactured on 0.045 micron technology
Memory controller supports DDR3 memory up to 1333 MHz
Unlocked clock multiplier

CPUs, related to Intel Core i5-655K

Model Cores /
Threads Freq. Turbo
freq. L3
cache TDP Features

Intel Core i5 family, Socket 1156

   Intel Core i5-650 2 / 4 3.2 GHz 3.46 GHz 4 MB 73 Watt SSE4, AES, HT, TXT, TBT, Unlock

   Intel Core i5-661 2 / 4 3.33 GHz 3.6 GHz 4 MB 87 Watt SSE4, AES, HT, TBT, Unlock

   Intel Core i5-660 2 / 4 3.33 GHz 3.6 GHz 4 MB 73 Watt SSE4, AES, HT, TXT, TBT, Unlock

   Intel Core i5-670 2 / 4 3.46 GHz 3.73 GHz 4 MB 73 Watt SSE4, AES, HT, TXT, TBT, Unlock

   Intel Core i5-680 2 / 4 3.6 GHz 3.86 GHz 4 MB 73 Watt SSE4, AES, HT, TXT, TBT, Unlock

   Intel Core i5-750S 4 / 4 2.4 GHz 3.2 GHz 8 MB 82 Watt SSE4, AES, HT, TBT, Unlock

   Intel Core i5-750 4 / 4 2.66 GHz 3.2 GHz 8 MB 95 Watt SSE4, AES, HT, TBT, Unlock

   Intel Core i5-760 4 / 4 2.8 GHz 3.46 GHz 8 MB 95 Watt SSE4, AES, HT, TBT, Unlock

Other families, Nehalem micro-architecture, Socket 1156

   Intel Pentium G6950 2 / 2 2.8 GHz 3 MB 73 Watt SSE4, AES, HT, TBT, Unlock

   Intel Pentium G6951 2 / 2 2.8 GHz 3 MB SSE4, AES, HT, TBT, Unlock

   Intel Pentium G6960 2 / 2 2.93 GHz 3 MB 73 Watt SSE4, AES, HT, TBT, Unlock

   Intel Core i3-530 2 / 4 2.93 GHz 4 MB 73 Watt SSE4, AES, HT, TBT, Unlock

   Intel Core i3-540 2 / 4 3.06 GHz 4 MB 73 Watt SSE4, AES, HT, TBT, Unlock

   Intel Core i3-550 2 / 4 3.2 GHz 4 MB 73 Watt SSE4, AES, HT, TBT, Unlock

   Intel Core i3-560 2 / 4 3.33 GHz 4 MB 73 Watt SSE4, AES, HT, TBT, Unlock

   Intel Core i7-870 4 / 8 2.93 GHz 3.6 GHz 8 MB 95 Watt SSE4, AES, HT, TXT, TBT, Unlock

   Intel Core i7-875K 4 / 8 2.93 GHz 3.6 GHz 8 MB 95 Watt SSE4, AES, HT, TBT, Unlock

   Intel Core i7-880 4 / 8 3.06 GHz 3.73 GHz 8 MB 95 Watt SSE4, AES, HT, TXT, TBT, Unlock

• Highlighted numbers and features indicate whether specific processor performs better or worse than Core i5-655K

• Within each category, the CPUs are sorted from slower (at the top) to faster (at the bottom)

• List of related CPUs is not complete.

• Features abbreviations:

SSE4 - SSE4 instructions
AES - AES instructions
HT - Hyper-Threading
TXT - Trusted Execution
TBT - Dynamic Acceleration / Turbo Boost
Unlock - Unlocked multiplier

Pictures (8)



2010-07-15 23:18:17 Posted by: gshv



2010-07-15 23:18:42 Posted by: gshv



2010-07-15 23:19:03 Posted by: gshv


Intel Core i5-655K box
2010-07-15 23:25:50 Posted by: gshv
The box has the same size as Pentium 6500K unlocked microprocessor, but different (newer) design. Width and height of the box are the same as for other boxed locked Core i5 CPUs, and the depth is about 1/2 of the depth of locked boxed processors. The smaller size of the box is possible because it doesn't come with the fan/heatsink.


2010-09-23 23:36:57 Posted by: gshv
Bottom view

Intel Core i5-655K CPU picture
2010-09-23 23:41:21 Posted by: gshv
Top view. S-Spec code SLBXL. The processor manufactured in the middle of February 2010. The markings on the CPU are "3.20GHZ/4M/09A".


2012-04-25 17:26:28 Posted by: gshv
CPU-Z screenshot


2012-04-25 17:30:43 Posted by: gshv
CPU-Z screenshot of Core i5-655K, overclocked to 4 GHz. Default voltage, stock fan/heatsink.

News

Intel to discontinue socket 1156 "K" CPUs, embedded chips

Aug 07, 2011: A few days ago, Intel published Product Change Notifications (PCN) documents, where it disclosed plans to discontinue several socket 1156 processors in 2012. Core i5-760, as well as two unlocked "K" models, Core i5-655K and Core i7-875K, will be available for order until February 24, 2012. Last week, Intel also announced discontinuation of a large number of embedded microprocessors.

Intel added pricing for new Core i3/ i5 / i7 microprocessors

Jun 01, 2010: On May 27th we posted a news story about new Intel processors coming this quarter - Xeon X3480, Pentium Dual-Core E6700, Core I3-550, and unlocked Core i5 I5-655K and Intel Core I7-875K CPUs. All these models, as well as Core i7-880, were listed in today's Intel price list.

Reviews of Core i5-655K and Core i7-875K unlocked microprocessors

May 29, 2010: Non-Disclosure Agreement for i5-655K and i7-875K processors was lifted yesterday, May 28, and many sites posted reviews of these two CPUs. Most of the reviewed microprocessors were engineering samples, or, to be more exact, qualification samples.

Intel microprocessors planned for this quarter

May 27, 2010: We discovered information about new Intel desktop and server microprocessors, planned for this quarter, in a leaked Intel document. The document lists 6 new desktop processors and one server CPU.

Core i5-655K and Core i7-875K are in stock

May 19, 2010: On May 7th we posted news about pre-order of Core i5-655K and Core i7-875K microprocessors. It seems that the processors are now in stock.

Core i7-875K and Core i5-655K are available for pre-order

May 07, 2010: Core i7-875K and Core i5-655K are 32nm microprocessors with unlocked core multiplier that are expected next month. Both CPUs are based on enhanced Nehalem micro-architecture, and feature Turbo Boost and HyperThreading technologies.

Benchmarks

Compare results with tested CPUs from one of the following families:
To compare benchmark results with all other microprocessors please

Tested processor

S-spec number:

SLBXL

CPU ID:

0655h

CPU vendor string:

GenuineIntel

CPU name string:

Intel(R) Core(TM) i5 CPU K 655 @ 3.20GHz

Integer performance

Part number		Result
AMD Phenom II X3 740 ?		100.8%
AMD Phenom II X3 B75 ?		100.8%
AMD Athlon II X3 440 (rev. C3) ?		100.8%
AMD Athlon II X3 440 (rev. C2) ?		100.8%
Intel Core i5-650 ?		100.3%
Intel Core i5-655K ?		100%
Intel Core i3-560 ?		100%
Intel Core i5-2520M (PGA) ?		98.1%
AMD Athlon II X3 435 (rev. C3) ?		97.4%
AMD Athlon II X3 435 (rev. C2) ?		97.3%
Intel Core i3-550 ?		96%

Floating Point performance

Part number		Result
AMD A6-3670K ?		102.9%
AMD Phenom II X4 650T ?		102.3%
Intel Core i3-2130 ?		101.7%
Intel Core i5-661 ?		101.1%
Intel Core i5-660 ?		101.1%
Intel Core i5-655K ?		100%
Intel Core i3-560 ?		99.9%
Intel Core i7-720QM ?		99.5%
AMD A6-3650 ?		99.2%
AMD Athlon II X4 631 ?		98.9%
AMD Phenom II X4 810 ?		98.7%

MMX / SSE / SSE2 performance

Part number		Result
AMD Athlon II X4 635 (rev. C3) ?		102%
Intel Core 2 Quad Q6700 ?		102%
Intel Core i5-661 ?		100.5%
Intel Core i5-660 ?		100.3%
Intel Core i5-2390T ?		100%
Intel Core i5-655K ?		100%
AMD Phenom II X4 830 ?		99.3%
AMD Phenom II X4 925 (rev. C3) ?		99.2%
AMD Phenom II X4 B93 ?		99.2%
Intel Core i3-560 ?		99.2%
AMD Phenom II X4 925 (rev. C2) ?		98.9%

Memory-intensive program performance

Part number		Result
AMD Phenom II X4 830 ?		100.5%
Intel Core 2 Duo E8400 ?		100.4%
AMD Phenom II X3 740 ?		100.4%
AMD A8-3870K ?		100.3%
Intel Core i5-2410M (PGA) ?		100.3%
Intel Core i5-655K ?		100%
Intel Core i5-650 ?		99.9%
AMD A8-3850 ?		99%
AMD Phenom II X4 650T ?		98.6%
Intel Core 2 Duo E8300 ?		98.6%
AMD Phenom II X4 820 ?		98.1%

CPU ID (1)

View / search public CPUID submissions | Check your CPU

NOTE: CPU ID information below was taken from one CPU and may include features that are not present in all different steppings of the Intel Core i5 i5-655K CPU.

Manufacturer:	Intel
CPU Family:	Core i5
Processor Number:	i5-655K
Frequency:	3210 MHz

Part number:	CM80616003174AO
S-Spec Number:	SLBXL
Comment:
Submitted by:	CPU-World

General information
Vendor:	GenuineIntel
Processor name (BIOS):	Intel(R) Core(TM) i5 CPU K 655 @ 3.20GHz
Cores:	2
Logical processors:	4
Processor type:	Original OEM Processor
CPUID signature:	20655
Family:	6 (06h)
Model:	37 (025h)
Stepping:	5 (05h)
TLB/Cache details:	64-byte Prefetching Data TLB0: 2-MB or 4-MB pages, 4-way associative, 32 entries Data TLB: 4-KB Pages, 4-way set associative, 64 entries Instruction TLB: 2-MB or 4-MB pages, fully associative, 7 entries Instruction TLB: 4-KB pages, 4-way set associative, 64 entries Shared 2nd-level TLB: 4 KB pages, 4-way set associative, 512 entries

Cache: L1 data L1 instruction L2 L3

Size: 2 x 32 KB 2 x 32 KB 2 x 256 KB 4 MB

Associativity: 8-way set
associative 4-way set
associative 8-way set
associative 16-way set
associative

Line size: 64 bytes 64 bytes 64 bytes 64 bytes

Comments: Shared between all cores

Instruction set extensions Additional instructions

MMX CLFLUSH

SSE CMOV

SSE2 CMPXCHG16B

SSE3 CMPXCHG8B

SSSE3 FXSAVE/FXRSTORE

SSE4.1 MONITOR/MWAIT

SSE4.2 PCLMULDQ

AES instructions POPCNT

SYSENTER/SYSEXIT

Major features Other features

On-chip Floating Point Unit 36-bit page-size extensions

64-bit / Intel 64 64-bit debug store

NX bit/XD-bit Advanced programmable interrupt controller

Hyper-Threading Technology CPL qualified debug store

Intel Virtualization Debug store

Turbo Boost Debugging extensions

Enhanced SpeedStep Digital Thermal Sensor capability

LAHF/SAHF support in 64-bit mode

Machine check architecture

Machine check exception

Memory-type range registers

Model-specific registers

Page attribute table

Page global extension

Page-size extensions (4MB pages)

Pending break enable

Perfmon and Debug capability

Physical address extensions

Process context identifiers

RDTSCP

Self-snoop

TSC rate is ensured to be invariant across all states

Thermal monitor

Thermal monitor 2

Thermal monitor and software controlled clock facilities

Time stamp counter

Virtual 8086-mode enhancements

xTPR Update Control

Comments (0)

Last modified: 19 May 2012