Core Ultra 7 155H vs Core i9-9900X

Primary details

Comparing Core i9-9900X and Core Ultra 7 155H processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	487	383
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	13.73	no data
Market segment	Desktop processor	Laptop
Series	Intel Core i9	Intel Meteor Lake-H
Architecture codename	Skylake (server) (2017−2019)	Meteor Lake-H
Release date	8 October 2018 (5 years ago)	14 December 2023 (less than a year ago)
Launch price (MSRP)	$989	no data
Current price	$468 (0.5x MSRP)	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i9-9900X and Core Ultra 7 155H 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	10 (Deca-Core)	16 (Hexadeca-Core)
Threads	20	22
Base clock speed	3.5 GHz	3.8 GHz
Boost clock speed	4.5 GHz	4.8 GHz
Bus support	4 × 8 GT/s	no data
L1 cache	640 KB	112 KB (per core)
L2 cache	10 MB	2 MB (per core)
L3 cache	19.25 MB (shared)	24 MB (shared)
Chip lithography	14 nm	7 nm
Maximum core temperature	92 °C	no data
Maximum case temperature (TCase)	72 °C	no data
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	Yes	No

Compatibility

Information on Core i9-9900X and Core Ultra 7 155H 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	FCLGA2066	FCBGA2049
Power consumption (TDP)	165 Watt	28 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9900X and Core Ultra 7 155H. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	+
TSX	+	+
Thermal Monitoring	no data	+
Flex Memory Access	no data	+
SIPP	no data	-
Turbo Boost Max 3.0	+	+
Status	Discontinued	Launched

Security technologies

Core i9-9900X and Core Ultra 7 155H technologies aimed at improving security, for example, by protecting against hacks.

TXT	no data	+
EDB	+	+
Secure Key	no data	+
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9900X and Core Ultra 7 155H are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-9900X and Core Ultra 7 155H. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR5
Maximum memory size	128 GB	96 GB
Max memory channels	4	2
Maximum memory bandwidth	85 GB/s	no data
ECC memory support	-	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	N/A	Intel® Arc™ graphics
Quick Sync Video	no data	+
Graphics max frequency	no data	2.25 GHz

Graphics interfaces

Available interfaces and connections of Core i9-9900X and Core Ultra 7 155H integrated GPUs.

Number of displays supported

no data

4

Graphics image quality

Maximum display resolutions supported by Core i9-9900X and Core Ultra 7 155H integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4	no data	4096 x 2304 @ 60Hz (HDMI 2.1 TMDS) 7680 x 4320 @ 60Hz (HDMI2.1 FRL)
Max resolution over eDP	no data	3840x2400 @ 120Hz
Max resolution over DisplayPort	no data	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Core i9-9900X and Core Ultra 7 155H integrated GPUs, sometimes API versions are included.

DirectX	no data	12.2
OpenGL	no data	4.6

Peripherals

Specifications and connection of peripherals supported by Core i9-9900X and Core Ultra 7 155H.

PCIe version	3.0	5.0
PCI Express lanes	44	28
PCI support	no data	5.0 and 4.0

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.

Core Ultra 7 155H outperforms Core i9-9900X by 14% based on our aggregate benchmark results.

---

Pros & cons summary

---

Performance score	14.10	16.14
Recency	8 October 2018	14 December 2023
Physical cores	10	16
Threads	20	22
Chip lithography	14 nm	7 nm
Power consumption (TDP)	165 Watt	28 Watt

---

Should you still have questions on choice between Core i9-9900X and Core Ultra 7 155H, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

---