Xeon w5-2455X vs i7-975

Primary details

Comparing Core i7-975 and Xeon w5-2455X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1830	209
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.10	62.29
Market segment	Desktop processor	Server
Series	Core i7 (Desktop)	no data
Power efficiency	1.60	11.27
Architecture codename	Bloomfield (2008−2010)	Sapphire Rapids (2023−2024)
Release date	2 June 2009 (15 years ago)	15 February 2023 (1 year ago)
Launch price (MSRP)	$476	$1,039

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon w5-2455X has 62190% better value for money than i7-975.

Detailed specifications

Core i7-975 and Xeon w5-2455X 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	4 (Quad-Core)	12 (Dodeca-Core)
Threads	8	24
Base clock speed	3.33 GHz	3.2 GHz
Boost clock speed	3.6 GHz	4.6 GHz
Bus rate	1333 MHz	no data
L1 cache	64 KB (per core)	80 KB (per core)
L2 cache	256 KB (per core)	2 MB (per core)
L3 cache	8 MB (shared)	30 MB
Chip lithography	45 nm	Intel 7 nm
Die size	263 mm2	no data
Maximum case temperature (TCase)	68 °C	77 °C
Number of transistors	731 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	+	+

Compatibility

Information on Core i7-975 and Xeon w5-2455X 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	1
Socket	FCLGA1366	FCLGA4677
Power consumption (TDP)	130 Watt	200 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-975 and Xeon w5-2455X. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	Intel® SSE4.1, Intel® AMX, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI	-	+
AVX	-	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	1.0	2.0
Hyper-Threading Technology	+	+
TSX	-	+
Idle States	+	no data
Demand Based Switching	-	no data
PAE	36 Bit	no data
Turbo Boost Max 3.0	no data	+
Deep Learning Boost	-	+

Security technologies

Core i7-975 and Xeon w5-2455X technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
SGX	no data	-
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-975 and Xeon w5-2455X are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-975 and Xeon w5-2455X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR5-4800
Maximum memory size	24 GB	2 TB
Max memory channels	3	4
Maximum memory bandwidth	25.6 GB/s	no data
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

N/A

Peripherals

Specifications and connection of peripherals supported by Core i7-975 and Xeon w5-2455X.

PCIe version	2.0	5.0
PCI Express lanes	no data	64

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.

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Pros & cons summary

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Performance score	2.28	24.71
Recency	2 June 2009	15 February 2023
Physical cores	4	12
Threads	8	24
Power consumption (TDP)	130 Watt	200 Watt

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Should you still have questions on choice between Core i7-975 and Xeon w5-2455X, ask them in Comments section, and we shall answer.

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