Core 2 Quad Q9400 vs Xeon X5650

Primary details

Comparing Xeon X5650 and Core 2 Quad Q9400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	1390	2120
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.25	3.51
Market segment	Server	Desktop processor
Architecture codename	Westmere-EP (2010−2011)	Yorkfield (2007−2009)
Release date	16 March 2010 (14 years ago)	August 2008 (15 years ago)
Launch price (MSRP)	$53	no data
Current price	$44 (0.8x MSRP)	$84

Cost-effectiveness evaluation

Performance per price, higher is better.

Core 2 Quad Q9400 has 1304% better value for money than Xeon X5650.

Detailed specifications

Xeon X5650 and Core 2 Quad Q9400 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	6 (Hexa-Core)	4 (Quad-Core)
Threads	12	4
Base clock speed	2.66 GHz	2.66 GHz
Boost clock speed	3.06 GHz	2.67 GHz
L1 cache	64 KB (per core)	64K (per core)
L2 cache	256 KB (per core)	6 MB (shared)
L3 cache	12 MB (shared)	0 KB
Chip lithography	32 nm	45 nm
Die size	239 mm2	2x 81 mm2
Maximum core temperature	81 °C	71 °C
Maximum case temperature (TCase)	no data	71 °C
Number of transistors	1,170 million	456 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No
VID voltage range	no data	0.85V-1.3625V

Compatibility

Information on Xeon X5650 and Core 2 Quad Q9400 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	2	1
Socket	FCLGA1366,LGA1366	LGA775
Power consumption (TDP)	95 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon X5650 and Core 2 Quad Q9400. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	no data
AES-NI	+	-
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	1.0	-
Hyper-Threading Technology	+	-
Idle States	+	+
Thermal Monitoring	-	+
Demand Based Switching	+	-
PAE	40 Bit	no data
FSB parity	no data	-
Status	Discontinued	Discontinued

Security technologies

Xeon X5650 and Core 2 Quad Q9400 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon X5650 and Core 2 Quad Q9400 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon X5650 and Core 2 Quad Q9400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR1, DDR2, DDR3
Maximum memory size	288 GB	no data
Max memory channels	3	no data
Maximum memory bandwidth	32 GB/s	no data
ECC memory support	+	no data

Peripherals

Specifications and connection of peripherals supported by Xeon X5650 and Core 2 Quad Q9400.

PCIe version

2.0

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.

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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.

Xeon X5650 outperforms Core 2 Quad Q9400 by 170% based on our aggregated benchmark results.

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Pros & cons summary

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Performance score	3.70	1.37
Physical cores	6	4
Threads	12	4
Chip lithography	32 nm	45 nm

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Should you still have questions on choice between Xeon X5650 and Core 2 Quad Q9400, ask them in Comments section, and we shall answer.

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