Celeron 2.40 vs Atom Z520

Place in the ranking	3388	3377
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Desktop processor
Series	Intel Atom	no data
Power efficiency	3.79	0.12
Architecture codename	Silverthorne (2008−2010)	Northwood (2002−2004)
Release date	2 April 2008 (16 years ago)	March 2003 (21 year ago)
Launch price (MSRP)	$65	no data

Detailed specifications

Atom Z520 and Celeron 2.40 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	1 (Single-Core)	1 (Single-Core)
Threads	2	1
Base clock speed	1.33 GHz	no data
Boost clock speed	0.03 GHz	2.4 GHz
Bus type	FSB	no data
Bus rate	533.33 MT/s	no data
Multiplier	10	no data
L1 cache	56 KB	8 KB
L2 cache	512 KB	128 KB
L3 cache	0 KB	0 KB
Chip lithography	45 nm	130 nm
Die size	24.18 mm²	146 mm²
Maximum core temperature	90 °C	no data
Number of transistors	47 Million	55 million
64 bit support	-	-
Windows 11 compatibility	-	-
VID voltage range	0.75-1.1V	no data

Compatibility

Information on Atom Z520 and Celeron 2.40 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1 (Uniprocessor)	1
Socket	PBGA441	478
Power consumption (TDP)	2 Watt	73 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Atom Z520 and Celeron 2.40. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE2, Intel® SSE3, Intel® SSSE3	no data
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	+	no data
FSB parity	-	no data

Security technologies

Atom Z520 and Celeron 2.40 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Atom Z520 and Celeron 2.40 are enumerated here.

VT-d	-	no data
VT-x	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Atom Z520 and Celeron 2.40. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

no data

DDR1, DDR2

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

Atom Z520 0.08

Celeron 2.40 0.09
+12.5%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Atom Z520 122

Celeron 2.40 143
+17.2%