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Clarksfield
General Info
Designer	Intel
Manufacturer	Intel
Introduction	June 24, 2009 (announced) September 23, 2009 (launched)
Microarchitecture
ISA	x86-64
Microarchitecture	Nehalem
Word Size	8 octets 16 nibbles 64 bit
Process	45 nm 0.045 μm 4.5e-5 mm
Technology	CMOS
Clock	1.60 GHz - 2.13 GHz
Succession
Arrandale

Clarksfield (also Clarksfield QC) is the core name given by Intel for their quad-core using 5 series chipset. These were first generation (Nehalem-based) Core i7 high-performance mobile processors. These chips were manufactured on a 45 nm process and uses PM55 Express chipset. These MPUs introduce a number of new features.

Features

• 45 nm process
• PM55 Express chipset (Calpella platform)
• 4 Cores, 8 Threads
• 45 W - 55 W TDP
• 2.5 GT/s DMI 1.0
• 8 GiB Maximum Memory (DDR3-1333), unofficially with four sockets 32GiB
• Support everything up to SSE4.2 (MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2)
• Supports Hyper-Threading, VT-x, VT-d, EPT, TBT 1.0, and TXT
• No IGP

Members

Clarksfield-based Microprocessors
Model	Family	Price	Launched	TDP	Freq	Turbo	L3$	vPro
i7-720QM	Core i7	$ 364.00 € 327.60 £ 294.84 ¥ 37,612.12	23 September 2009	45 W 45,000 mW 0.0603 hp 0.045 kW	1,599.99 MHz 1.6 GHz 1,599,990 kHz	2,799.99 MHz 2.8 GHz 2,799,990 kHz	6 MiB 6,144 KiB 6,291,456 B 0.00586 GiB	✔
i7-740QM	Core i7	$ 378.00 € 340.20 £ 306.18 ¥ 39,058.74	22 June 2010	45 W 45,000 mW 0.0603 hp 0.045 kW	1,733.33 MHz 1.733 GHz 1,733,330 kHz	2,933.33 MHz 2.933 GHz 2,933,330 kHz	6 MiB 6,144 KiB 6,291,456 B 0.00586 GiB	✔
i7-820QM	Core i7	$ 546.00 € 491.40 £ 442.26 ¥ 56,418.18	23 September 2009	45 W 45,000 mW 0.0603 hp 0.045 kW	1,733.33 MHz 1.733 GHz 1,733,330 kHz	3,066.66 MHz 3.067 GHz 3,066,660 kHz	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	✔
i7-840QM	Core i7	$ 568.00 € 511.20 £ 460.08 ¥ 58,691.44	22 June 2010	45 W 45,000 mW 0.0603 hp 0.045 kW	1,866.66 MHz 1.867 GHz 1,866,660 kHz	3,199.99 MHz 3.2 GHz 3,199,990 kHz	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	✔
i7-920XM	Core i7EE	$ 1,054.00 € 948.60 £ 853.74 ¥ 108,909.82	23 September 2009	55 W 55,000 mW 0.0738 hp 0.055 kW	1,999.99 MHz 2 GHz 1,999,990 kHz	3,199.99 MHz 3.2 GHz 3,199,990 kHz	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	✔
i7-940XM	Core i7EE	$ 1,096.00 € 986.40 £ 887.76 ¥ 113,249.68	22 June 2010	55 W 55,000 mW 0.0738 hp 0.055 kW	2,133.33 MHz 2.133 GHz 2,133,330 kHz	3,333.33 MHz 3.333 GHz 3,333,330 kHz	8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB	✔
Count: 6

See also

• Nehalem
• Penryn