Intel Atom Z515 vs Intel Celeron M 540

Comparative analysis of Intel Atom Z515 and Intel Celeron M 540 processors for all known characteristics in the following categories: Essentials, Performance, Compatibility, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark.

Intel Atom Z515

Intel Celeron M 540

Differences

Reasons to consider the Intel Atom Z515

CPU is newer: launch date 1 year(s) 6 month(s) later
A newer manufacturing process allows for a more powerful, yet cooler running processor: 45 nm vs 65 nm
30x lower typical power consumption: 1.4 Watt vs 30 Watt

Launch date	April 2009 vs 1 October 2007
Manufacturing process technology	45 nm vs 65 nm
Thermal Design Power (TDP)	1.4 Watt vs 30 Watt

Reasons to consider the Intel Celeron M 540

Around 55% higher clock speed: 1.86 GHz vs 1.2 GHz
Around 11% higher maximum core temperature: 100°C vs 90°C
2x more L2 cache, more data can be stored in the L2 cache for quick access later
2.5x better performance in PassMark - CPU mark: 542 vs 218

Specifications (specs)
Maximum frequency	1.86 GHz vs 1.2 GHz
Maximum core temperature	100°C vs 90°C
L2 cache	1 MB vs 512 KB (per core)
Benchmarks
PassMark - CPU mark	542 vs 218

Compare benchmarks

CPU 1: Intel Atom Z515
CPU 2: Intel Celeron M 540

PassMark - CPU mark

CPU 1

CPU 2

218

542

Name	Intel Atom Z515	Intel Celeron M 540
PassMark - Single thread mark	0	0
PassMark - CPU mark	218	542

Compare specifications (specs)

	Intel Atom Z515	Intel Celeron M 540
Essentials
Architecture codename	Silverthorne	Merom
Launch date	April 2009	1 October 2007
Place in performance rating	not rated	not rated
Processor Number	Z515	540
Series	Legacy Intel Atom® Processors	Legacy Intel® Celeron® Processor
Status	Discontinued	Discontinued
Vertical segment	Mobile	Mobile
Performance
Base frequency	1.20 GHz	1.86 GHz
Bus Speed	400 MHz FSB	533 MHz FSB
Die size	26 mm2	143 mm2
L1 cache	64 KB (per core)
L2 cache	512 KB (per core)	1 MB
Manufacturing process technology	45 nm	65 nm
Maximum core temperature	90°C	100°C
Maximum frequency	1.2 GHz	1.86 GHz
Number of cores	1	1
Transistor count	47 million	291 million
64 bit support
Front-side bus (FSB)		533 MHz
Number of threads		1
VID voltage range		0.95V-1.30V
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1
Package Size	13mm x 14mm	35mm x 35mm
Sockets supported	PBGA441	PPGA478
Thermal Design Power (TDP)	1.4 Watt	30 Watt
Security & Reliability
Execute Disable Bit (EDB)
Intel® Trusted Execution technology (TXT)
Advanced Technologies
Enhanced Intel SpeedStep® technology
FSB parity
Idle States
Instruction set extensions	Intel® SSE2, Intel® SSE3, Intel® SSSE3
Intel 64
Intel® Demand Based Switching
Intel® Hyper-Threading technology
Intel® Turbo Boost technology
Thermal Monitoring
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)