Intel Pentium 4 1.9 vs Intel Pentium 4 1.8A

Comparative analysis of Intel Pentium 4 1.9 and Intel Pentium 4 1.8A processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Security & Reliability, Advanced Technologies, Virtualization.

Intel Pentium 4 1.9

Intel Pentium 4 1.8A

Differences

Reasons to consider the Intel Pentium 4 1.9

CPU is newer: launch date 1 month(s) later
Around 6% higher clock speed: 1.9 GHz vs 1.8 GHz

Launch date	August 2001 vs July 2001
Maximum frequency	1.9 GHz vs 1.8 GHz

Reasons to consider the Intel Pentium 4 1.8A

Around 3% lower typical power consumption: 67 Watt vs 69.2 Watt

Thermal Design Power (TDP)	67 Watt vs 69.2 Watt

Compare specifications (specs)

	Intel Pentium 4 1.9	Intel Pentium 4 1.8A
Essentials
Architecture codename	Willamette	Willamette
Launch date	August 2001	July 2001
Place in performance rating	not rated	not rated
Series	Legacy Intel® Pentium® Processor
Status	Discontinued
Vertical segment	Desktop	Desktop
Performance
64 bit support
Base frequency	1.90 GHz
Bus Speed	400 MHz FSB
Die size	217 mm2	217 mm
L1 cache	8 KB	8 KB
L2 cache	256 KB	256 KB
Manufacturing process technology	180 nm	180 nm
Maximum case temperature (TCase)	73 °C	78 °C
Maximum core temperature	73°C
Maximum frequency	1.9 GHz	1.8 GHz
Number of cores	1	1
Transistor count	42 million	42 million
VID voltage range	1.570V-1.75V
Memory
Supported memory types	DDR1, DDR2
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1	1
Package Size	53.3mm x 53.3mm
Sockets supported	PPGA478, PPGA423	423
Thermal Design Power (TDP)	69.2 Watt	67 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
Virtualization
Intel® Virtualization Technology (VT-x)