Intel Xeon E3-1275 vs Intel Xeon L5520

Comparative analysis of Intel Xeon E3-1275 and Intel Xeon L5520 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Graphics, Graphics interfaces, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core.

Intel Xeon E3-1275

Intel Xeon L5520

Differences

Reasons to consider the Intel Xeon E3-1275

CPU is newer: launch date 2 year(s) 1 month(s) later
Around 53% higher clock speed: 3.80 GHz vs 2.48 GHz
Around 4% higher maximum core temperature: 72.6°C vs 70°C
A newer manufacturing process allows for a more powerful, yet cooler running processor: 32 nm vs 45 nm
Around 83% better performance in PassMark - Single thread mark: 1770 vs 969
Around 21% better performance in PassMark - CPU mark: 5503 vs 4561

Specifications (specs)
Launch date	April 2011 vs March 2009
Maximum frequency	3.80 GHz vs 2.48 GHz
Maximum core temperature	72.6°C vs 70°C
Manufacturing process technology	32 nm vs 45 nm
Benchmarks
PassMark - Single thread mark	1770 vs 969
PassMark - CPU mark	5503 vs 4561

Reasons to consider the Intel Xeon L5520

4.5x more maximum memory size: 144 GB vs 32 GB
Around 58% lower typical power consumption: 60 Watt vs 95 Watt

Maximum memory size	144 GB vs 32 GB
Max number of CPUs in a configuration	2 vs 1
Thermal Design Power (TDP)	60 Watt vs 95 Watt

Compare benchmarks

CPU 1: Intel Xeon E3-1275
CPU 2: Intel Xeon L5520

PassMark - Single thread mark

CPU 1

CPU 2

1770

969

PassMark - CPU mark

CPU 1

CPU 2

5503

4561

Name	Intel Xeon E3-1275	Intel Xeon L5520
PassMark - Single thread mark	1770	969
PassMark - CPU mark	5503	4561
Geekbench 4 - Single Core		2032
Geekbench 4 - Multi-Core		6619

Compare specifications (specs)

	Intel Xeon E3-1275	Intel Xeon L5520
Essentials
Architecture codename	Sandy Bridge	Nehalem EP
Launch date	April 2011	March 2009
Launch price (MSRP)	$450	$100
Place in performance rating	1328	1359
Price now	$304	$12.92
Processor Number	E3-1275	L5520
Series	Intel® Xeon® Processor E3 Family	Legacy Intel® Xeon® Processors
Status	Discontinued	Launched
Value for money (0-100)	8.09	100.00
Vertical segment	Server	Server
Performance
64 bit support
Base frequency	3.40 GHz	2.26 GHz
Bus Speed	5 GT/s DMI	5.86 GT/s QPI
Die size	216 mm	263 mm2
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	8192 KB (shared)	8192 KB (shared)
Manufacturing process technology	32 nm	45 nm
Maximum core temperature	72.6°C	70°C
Maximum frequency	3.80 GHz	2.48 GHz
Number of cores	4	4
Number of threads	8	8
Transistor count	1160 million	731 million
Number of QPI Links		2
VID voltage range		0.75V -1.35V
Memory
ECC memory support
Max memory channels	2	3
Maximum memory bandwidth	21 GB/s	25.6 GB/s
Maximum memory size	32 GB	144 GB
Supported memory types	DDR3 1066/1333	DDR3 800/1066
Graphics
Graphics base frequency	850 MHz
Graphics max dynamic frequency	1.35 GHz
Graphics max frequency	1.35 GHz
Intel® Clear Video HD technology
Intel® Flexible Display Interface (Intel® FDI)
Intel® InTru™ 3D technology
Intel® Quick Sync Video
Processor graphics	Intel HD Graphics P3000
Graphics interfaces
Number of displays supported	2
Wireless Display (WiDi) support
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1	2
Package Size	37.5mm x 37.5mm	42.5mm x 45mm
Sockets supported	LGA1155	FCLGA1366
Thermal Design Power (TDP)	95 Watt	60 Watt
Peripherals
Max number of PCIe lanes	20
PCI Express revision	2.0
Security & Reliability
Execute Disable Bit (EDB)
Intel® Identity Protection technology
Intel® Trusted Execution technology (TXT)
Advanced Technologies
Enhanced Intel SpeedStep® technology
Flexible Display interface (FDI)
Idle States
Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX
Intel 64
Intel® Advanced Vector Extensions (AVX)
Intel® AES New Instructions
Intel® Demand Based Switching
Intel® Fast Memory Access
Intel® Flex Memory Access
Intel® Hyper-Threading technology
Intel® Turbo Boost technology
Intel® vPro™ Platform Eligibility
Thermal Monitoring
Physical Address Extensions (PAE)		40-bit
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)