Atom Z520 vs Celeron B800

Place in the ranking	2987	3398
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Celeron	Intel Atom
Power efficiency	1.13	3.77
Architecture codename	Sandy Bridge (2011−2013)	Silverthorne (2008−2010)
Release date	19 June 2011 (13 years ago)	2 April 2008 (16 years ago)
Launch price (MSRP)	$80	$65

Detailed specifications

Celeron B800 and Atom Z520 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	2 (Dual-core)	1 (Single-Core)
Threads	2	2
Base clock speed	1.5 GHz	1.33 GHz
Boost clock speed	1.5 GHz	0.03 GHz
Bus type	DMI 2.0	FSB
Bus rate	4 × 5 GT/s	533.33 MT/s
Multiplier	15	10
L1 cache	64K (per core)	56 KB
L2 cache	256K (per core)	512 KB
L3 cache	2 MB (shared)	0 KB
Chip lithography	32 nm	45 nm
Die size	131 mm²	24.18 mm²
Maximum core temperature	100 °C	90 °C
Number of transistors	504 million	47 Million
64 bit support	+	-
Windows 11 compatibility	-	-
VID voltage range	no data	0.75-1.1V

Compatibility

Information on Celeron B800 and Atom Z520 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 (Uniprocessor)
Socket	FCPGA988	PBGA441
Power consumption (TDP)	35 Watt	2 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron B800 and Atom Z520. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	Intel® SSE2, Intel® SSE3, Intel® SSSE3
FMA	+	-
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	-
Hyper-Threading Technology	-	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	no data
Demand Based Switching	-	+
FDI	+	no data
Fast Memory Access	+	no data
FSB parity	no data	-

Security technologies

Celeron B800 and Atom Z520 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	-
EDB	+	+
Anti-Theft	-	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Celeron B800 and Atom Z520 are enumerated here.

VT-d	-	-
VT-x	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Celeron B800 and Atom Z520. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	no data
Maximum memory size	16 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	21.335 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics for 2nd Generation Intel Processors	-
Clear Video HD	-	-
Graphics max frequency	1 GHz	-
InTru 3D	-	-

Graphics interfaces

Available interfaces and connections of Celeron B800 and Atom Z520 integrated GPUs.

Number of displays supported	2	-
eDP	+	-
DisplayPort	+	-
HDMI	+	-
SDVO	+	-
CRT	+	-

Peripherals

Specifications and connection of peripherals supported by Celeron B800 and Atom Z520.

PCIe version	2.0	no data
PCI Express lanes	16	no data

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.

Celeron B800 0.42
+425%

Atom Z520 0.08

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.

Celeron B800 663
+443%

Atom Z520 122

Cinebench 10 32-bit single-core

Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.

Celeron B800 1910
+325%

Atom Z520 449

Cinebench 10 32-bit multi-core

Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.

Celeron B800 3779
+448%

Atom Z520 690

3DMark06 CPU

3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.

Celeron B800 1534
+292%

Atom Z520 391

wPrime 32

wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.

Celeron B800 47
+211%

Atom Z520 146.28

Gaming performance

Pros & cons summary

Performance score	0.42	0.08
Recency	19 June 2011	2 April 2008
Physical cores	2	1
Chip lithography	32 nm	45 nm
Power consumption (TDP)	35 Watt	2 Watt

Celeron B800 has a 425% higher aggregate performance score, an age advantage of 3 years, 100% more physical cores, and a 40.6% more advanced lithography process.

Atom Z520, on the other hand, has 1650% lower power consumption.

The Celeron B800 is our recommended choice as it beats the Atom Z520 in performance tests.

Should you still have questions on choice between Celeron B800 and Atom Z520, ask them in Comments section, and we shall answer.