Intel Pentium 4 HT 651 vs Intel Pentium 4 HT 661

Comparative analysis of Intel Pentium 4 HT 651 and Intel Pentium 4 HT 661 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Security & Reliability, Advanced Technologies, Virtualization.

Intel Pentium 4 HT 651

Intel Pentium 4 HT 661

Differences

Reasons to consider the Intel Pentium 4 HT 661

Around 6% higher clock speed: 3.6 GHz vs 3.4 GHz

Maximum frequency	3.6 GHz vs 3.4 GHz

Compare specifications (specs)

	Intel Pentium 4 HT 651	Intel Pentium 4 HT 661
Essentials
Architecture codename	Cedarmill	Cedarmill
Launch date	January 2006	January 2006
Place in performance rating	not rated	not rated
Processor Number	651	661
Series	Legacy Intel® Pentium® Processor	Legacy Intel® Pentium® Processor
Status	Discontinued	Discontinued
Vertical segment	Desktop	Desktop
Performance
64 bit support
Base frequency	3.40 GHz	3.60 GHz
Bus Speed	800 MHz FSB	800 MHz FSB
Die size	81 mm2	81 mm2
L1 cache	28 KB	28 KB
L2 cache	2048 KB	2048 KB
Manufacturing process technology	65 nm	65 nm
Maximum core temperature	69.2°C	B1+C1=69°C, D0=64.4°C
Maximum frequency	3.4 GHz	3.6 GHz
Number of cores	1	1
Transistor count	188 million	188 million
VID voltage range	1.200V-1.3375V	1.200V-1.3375V
Memory
Supported memory types	DDR1, DDR2, DDR3	DDR1, DDR2, DDR3
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1	1
Package Size	37.5mm x 37.5mm	37.5mm x 37.5mm
Scenario Design Power (SDP)	0 W	0 W
Sockets supported	PLGA775	PLGA775
Thermal Design Power (TDP)	86 Watt	86 Watt
Security & Reliability
Execute Disable Bit (EDB)
Intel® Trusted Execution technology (TXT)
Advanced Technologies
Enhanced Intel SpeedStep® technology
FSB parity
Idle States
Intel 64
Intel® Demand Based Switching
Intel® Hyper-Threading technology
Intel® Turbo Boost technology
Physical Address Extensions (PAE)	32-bit	32-bit
Thermal Monitoring
Virtualization
Intel® Virtualization Technology (VT-x)