Xeon 634 vs 678X

Primary details

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

Place in the ranking	40	348
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	8.93	25.51
Market segment	Server	Server
Power efficiency	7.82	6.13
Designer	Intel	Intel
Manufacturer	Intel	Intel
Architecture codename	Granite Rapids (2024−2026)	Granite Rapids (2024−2026)
Release date	2 February 2026 (less than a year ago)	2 February 2026 (less than a year ago)
Launch price (MSRP)	$3,749	$499

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon 634 has 186% better value for money than Xeon 678X.

Performance to price scatter graph

Currently popular graphics cards are shown for comparison.

Detailed specifications

Basic parameters of Xeon 678X and Xeon 634: 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	48 (Octatetraconta-Core)	12 (Dodeca-Core)
Performance-cores	48	12
Threads	96	24
Base clock speed	2.4 GHz	2.7 GHz
Boost clock speed	4.9 GHz	4.6 GHz
Bus rate	0 GT/s	0 GT/s
L1 cache	112 KB (per core)	112 KB (per core)
L2 cache	2 MB (per core)	2 MB (per core)
L3 cache	192 MB (shared)	48 MB (shared)
Chip lithography	Intel 3 nm	Intel 3 nm
Die size	2x 598 mm2	598 mm2
Maximum case temperature (TCase)	82 °C	68 °C
64 bit support	+	+
Unlocked multiplier	+	+

Compatibility

Information on Xeon 678X and Xeon 634 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	FCLGA4710	FCLGA4710
Power consumption (TDP)	300 Watt	150 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon 678X and Xeon 634. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® AMX, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512	Intel® SSE4.1, Intel® AMX, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI	+	+
AVX	+	+
vPro	+	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	+	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	+
TSX	+	+
Turbo Boost Max 3.0	+	+
Deep Learning Boost	+	+

Security technologies

Xeon 678X and Xeon 634 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
SGX	-	-
OS Guard	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon 678X and Xeon 634 are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon 678X and Xeon 634. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR5(6400MT/s)MRDIMM(8000MT/s)	DDR5(6400MT/s)
Maximum memory size	4 TB	2 TB
Max memory channels	8	4
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 Xeon 678X and Xeon 634.

PCIe version	5.0	5.0
PCI Express lanes	128	80

Synthetic benchmarks

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.

---

Pros & cons summary

---

Performance score	57.07	22.38
Physical cores	48	12
Threads	96	24
Power consumption (TDP)	300 Watt	150 Watt