i486SL-20 vs Atom Z520

Primary details

Comparing processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	3809	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Atom	Intel 80486
Power efficiency	1.44	no data
Designer	Intel	Intel
Architecture codename	Silverthorne (2008−2010)	80486 (1989)
Release date	2 April 2008 (18 years ago)	no data
Launch price (MSRP)	$65	no data

Detailed specifications

Basic parameters of Atom Z520 and i486SL-20: 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	no data
Base clock speed	1.33 GHz	no data
Boost clock speed	0.03 GHz	0.02 GHz
Bus type	FSB	FSB
Bus rate	533.33 MT/s	20 MT/s
Multiplier	10	1
L1 cache	56 KB	8 KB
L2 cache	512 KB	no data
L3 cache	0 KB	no data
Chip lithography	45 nm	800 nm
Die size	24.18 mm2	no data
Maximum core temperature	90 °C	no data
Number of transistors	47 Million	1 Million
64 bit support	-	-
Windows 11 compatibility	-	no data
VID voltage range	0.75-1.1V	no data

Compatibility

Information on Atom Z520 and i486SL-20 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)	no data
Socket	PBGA441	no data
Power consumption (TDP)	2 Watt	no data

Technologies and extensions

Technological solutions and additional instructions supported by Atom Z520 and i486SL-20. 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 i486SL-20 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 i486SL-20 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 i486SL-20. Depending on the motherboard, higher memory frequencies may be supported.

Maximum memory size

no data

4 GB

Pros & cons summary

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Chip lithography

45 nm

800 nm