AMD Opteron X2 875 HE vs Intel Pentium 4 HT 661

Comparative analysis of AMD Opteron X2 875 HE and Intel Pentium 4 HT 661 processors for all known characteristics in the following categories: Essentials, Performance, Compatibility, Memory, Security & Reliability, Advanced Technologies, Virtualization.

AMD Opteron X2 875 HE

Intel Pentium 4 HT 661

Differences

Reasons to consider the AMD Opteron X2 875 HE

CPU is newer: launch date 1 month(s) later
1 more cores, run more applications at once: 2 vs 1
4.6x more L1 cache, more data can be stored in the L1 cache for quick access later
Around 56% lower typical power consumption: 55 Watt vs 86 Watt

Launch date	February 2006 vs January 2006
Number of cores	2 vs 1
L1 cache	128 KB vs 28 KB
Max number of CPUs in a configuration	8 vs 1
Thermal Design Power (TDP)	55 Watt vs 86 Watt

Reasons to consider the Intel Pentium 4 HT 661

Around 64% higher clock speed: 3.6 GHz vs 2.2 GHz
A newer manufacturing process allows for a more powerful, yet cooler running processor: 65 nm vs 90 nm
2x more L2 cache, more data can be stored in the L2 cache for quick access later

Maximum frequency	3.6 GHz vs 2.2 GHz
Manufacturing process technology	65 nm vs 90 nm
L2 cache	2048 KB vs 1024 KB

Compare specifications (specs)

	AMD Opteron X2 875 HE	Intel Pentium 4 HT 661
Essentials
Architecture codename	Egypt	Cedarmill
Launch date	February 2006	January 2006
Place in performance rating	not rated	not rated
Vertical segment	Server	Desktop
Processor Number		661
Series		Legacy Intel® Pentium® Processor
Status		Discontinued
Performance
64 bit support
L1 cache	128 KB	28 KB
L2 cache	1024 KB	2048 KB
Manufacturing process technology	90 nm	65 nm
Maximum frequency	2.2 GHz	3.6 GHz
Number of cores	2	1
Transistor count	233 million	188 million
Base frequency		3.60 GHz
Bus Speed		800 MHz FSB
Die size		81 mm2
Maximum core temperature		B1+C1=69°C, D0=64.4°C
VID voltage range		1.200V-1.3375V
Compatibility
Max number of CPUs in a configuration	8	1
Sockets supported	940	PLGA775
Thermal Design Power (TDP)	55 Watt	86 Watt
Low Halogen Options Available
Package Size		37.5mm x 37.5mm
Scenario Design Power (SDP)		0 W
Memory
Supported memory types		DDR1, DDR2, DDR3
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
Thermal Monitoring
Virtualization
Intel® Virtualization Technology (VT-x)