MSI GS66 Stealth vs. Alienware X15 R2: Full specs comparison

The following is a comprehensive comparison of the MSI GS66 Stealth and Alienware X15 R2 specifications, including details on CPU, memory, storage, battery life, display quality, and other features.

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MSI GS66 Stealth image

MSI GS66 Stealth

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Alienware X15 R2 image

Alienware X15 R2

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MSI GS66 Stealth Pros

Reasons that MSI GS66 Stealth is better than Alienware X15 R2.

Supports larger memory

MSI GS66 Stealth supports a larger memory capacity than the Alienware X15 R2. It supports up to 64GB versus 32GB of system memory on the Alienware X15 R2.

Max system memory size
MSI GS66 Stealth
64 GB
Alienware X15 R2
32 GB
Upgradable memory

MSI GS66 Stealth comes with two SODIMM slots that allow you to replace or upgrade when needed. On the flip side, you can't upgrade RAM on the Alienware X15 R2 since it has onboard memory.

MemoryMSI GS66 StealthAlienware X15 R2
Slots
x2
Onboard
TypeDDR4LPDDR5
About 11% lighter

MSI GS66 Stealth weighed 4.62 pounds, 11% lighter than the 5.15 pounds Alienware X15 R2.

WeightMSI GS66 StealthAlienware X15 R2
Pound
4.62 lbs.
5.15 lbs.
Kilogram
2.10 kg
2.34 kg

Alienware X15 R2 Pros

Reasons that Alienware X15 R2 is better than MSI GS66 Stealth.

Newer manufacturing

2022 vs. 2020

Much faster CPU performance

Intel Core i9-12900H inside Alienware X15 R2 has a 71% better multi-core CPU performance score than the Intel Core i9-10980HK inside MSI GS66 Stealth.

Geekbench 5 multi-core score
Alienware X15 R2 - Intel Core i9-12900H
12,027
Alienware X15 R2 - Intel Core i7-12700H
11,774
MSI GS66 Stealth - Intel Core i9-10980HK
7,013
MSI GS66 Stealth - Intel Core i7-10875H
6,874
MSI GS66 Stealth - Intel Core i7-10750H
5,412
Supports faster memory

Alienware X15 R2 supports a faster memory speed than the MSI GS66 Stealth. It supports up to 5200MHz versus 3200MHz of system memory on the MSI GS66 Stealth.

Memory type and speed
Alienware X15 R2 - LPDDR5
5,200 MHz
MSI GS66 Stealth - DDR4
3,200 MHz

Prices

Here are the latest price updates and offers for both devices.

MSI GS66 Stealth Price
MSI Stealth GS66 15.6” 240Hz Gaming Laptop: 12th Gen Intel Core i7, NVIDIA Geforce RTX 3070Ti, 32GB DDR5, 512GB NVMe SSD, Thunderbolt 4, Cooler Boost Trinity+, Win 11 PRO: Black 12UGS-246
 MSI Stealth GS66 15.6” 240Hz Gaming Laptop: 12th Gen Intel Core i7, NVIDIA Geforce RTX 3070Ti, 32GB DDR5, 512GB NVMe SSD, Thunderbolt 4, Cooler Boost Trinity+, Win 11 PRO: Black 12UGS-246
By MSI
$1,364.00
$1,999.99 32% OFF
See at Amazon
MSI Stealth GS66 Gaming Laptop 15.6" FHD 240Hz 12th Gen Intel 14-core i7-12700H 32GB RAM 1TB SSD GeForce RTX 3070 Ti 8GB Graphic RGB Backlit Thunderbolt4 Dynaudio 2.5GB Lan Win11Pro Black + HDMI Cable
 MSI Stealth GS66 Gaming Laptop 15.6" FHD 240Hz 12th Gen Intel 14-core i7-12700H 32GB RAM 1TB SSD GeForce RTX 3070 Ti 8GB Graphic RGB Backlit Thunderbolt4 Dynaudio 2.5GB Lan Win11Pro Black + HDMI Cable
By MSI
$1,479.00
See at Amazon
MSI GS66 Stealth 15.6" 240Hz 3ms Ultra Thin and Light Gaming Laptop Intel Core i7-10750H RTX2070 Max-Q 16GB 1TB NVMe SSD Win10 VR Ready (10SF-683)
 MSI GS66 Stealth 15.6" 240Hz 3ms Ultra Thin and Light Gaming Laptop Intel Core i7-10750H RTX2070 Max-Q 16GB 1TB NVMe SSD Win10 VR Ready (10SF-683)
By MSI
$1,699.00
See at Amazon
Alienware X15 R2 Price
Alienware X15 R2 Gaming Laptop - 15.6-inch FHD 360Hz 1ms Display, Intel Core i7-12700H, 16GB RAM, 512GB SSD, NVIDIA GeForce RTX 3070Ti 8GB GDDR6, USB-C, WiFi 6, Bluetooth, Windows 11 Home - White
 Alienware X15 R2 Gaming Laptop - 15.6-inch FHD 360Hz 1ms Display, Intel Core i7-12700H, 16GB RAM, 512GB SSD, NVIDIA GeForce RTX 3070Ti 8GB GDDR6, USB-C, WiFi 6, Bluetooth, Windows 11 Home - White
By Alienware
$1,980.77
See at Amazon
Alienware X15 R2 Gaming Laptop - 15.6-inch FHD 360Hz 1ms Display, Core i9-12900H, 16GB RAM, 1TB SSD, NVIDIA GeForce RTX 3070Ti 8GB GDDR6, Killer WiFi 6, Windows 11 Home - Lunar Light
 Alienware X15 R2 Gaming Laptop - 15.6-inch FHD 360Hz 1ms Display, Core i9-12900H, 16GB RAM, 1TB SSD, NVIDIA GeForce RTX 3070Ti 8GB GDDR6, Killer WiFi 6, Windows 11 Home - Lunar Light
By Alienware
$2,599.00
See at Amazon
Dell Alienware X15 R2 Gaming Laptop (2022) | 15.6" QHD | Core i9-2TB SSD - 32GB RAM - RTX 3080 | 14 Cores @ 5 GHz - 12th Gen CPU - 10GB GDDR6X Win 11 Pro (Renewed)
 Dell Alienware X15 R2 Gaming Laptop (2022) | 15.6" QHD | Core i9-2TB SSD - 32GB RAM - RTX 3080 | 14 Cores @ 5 GHz - 12th Gen CPU - 10GB GDDR6X Win 11 Pro (Renewed)
By Dell
$3,558.99
See at Amazon

Specs Comparison

Availability

MSI GS66 StealthAlienware X15 R2
Released20202022
Release Date-
  • Announced on January 4, 2022.
  • Available starting in Winter 2022.
Pricing-Starting at $2,199
Generations-

Exterior

MSI GS66 StealthAlienware X15 R2
Size Comparison
MSI GS66 StealthAlienware X15 R2
Dimensions14.10” x 9.76” x 0.72 ~ 0.79” (358.3 x 248 x 18.3 ~ 19.8 mm)
  • 14.16” x 10.915” x 0.642” (359.7 x 277.25 x 16.3 mm)
    With FHD 165Hz diplay.
  • 14.16” x 10.915” x 0.626” (359.7 x 277.25 x 15.9 mm)
    With FHD 360Hz or QHD 240Hz diplay.
Weight4.62 lbs (2.1 kg)5.15 ~ 5.2 lbs. (2.34 ~ 2.36 kg)
Colors-
Lunar light
Keyboard and Trackpad
  • Per-Key RGB gaming keyboard by SteelSeries
  • Silky smooth touchpad with multi-touch gesture
  • Keyboard
    • Alienware X-Series thin keyboard
    • Per-key RGB LED with AlienFX lighting
    • Anti-ghosting and N-key rollover technology.
    • 1.5mm key travel.
  • Touchpad
    • Multi-touch gesture Premium Precision glass touchpad with integrated scrolling.
    • 4.13 x 2.36 in (105 mm x 80 mm) precision touchpad with multi-touch gesture support.
    • Supports AlienFX touchpad.
Chasis Information-
  • Based on Alienware's Legend 2.0 industrial design language
  • Constructed with CNC aluminum and magnesium alloy parts
  • Engineered with Alienware Cryo-Tech™Cooling technology
  • Includes Alienware's Quad-Fan Design (patent-pending)
  • Element 31 thermal interface material (available with all configurations)

Display

MSI GS66 StealthAlienware X15 R2
Size15.6 Inches15.6 Inches
Info
  • 15.6" UHD (3840x2160), IPS-Level
  • 15.6" FHD (1920x1080), 240Hz, IPS-Level
  • 15.6" FHD (1920x1080), 300Hz, IPS-Level
  • 15.6” FHD with 165Hz
    1920 x 1080 141 PPI ComfortView Plus 3ms response time 300 nits 16:9 100% sRGB color gamut 1000:1 Anti-glare WVA 6W
  • 15.6” FHD with 360Hz
    1920 x 1080 141 PPI ComfortView Plus NVIDIA G-Sync Advanced Optimus 1ms response time 300 nits 16:9 100% sRGB color gamut 1000:1 Anti-glare WVA 7.6W
  • 15.6” QHD with 240Hz
    2560 x 1440 188 PPI ComfortView Plus NVIDIA G-Sync Advanced Optimus 2ms response time 400 nits 16:9 99% DCI-P3 color gamut 1000:1 Anti-glare WVA 10.15 W

Ports

MSI GS66 StealthAlienware X15 R2
MSI GS66 Stealth Ports
Image Source: MSI
Left (4)
  • 1 x Thunderbolt 3
    40 Gpbs, USB 3.2 Gen 2 (10 Gbps), DisplayPort, Power Delivery
  • 1 x USB-A
    USB 3.2 Gen 2 (10 Gbps)
  • 1 x HDMI
    4K@60Hz
  • 1 x power port
Right (5)
  • 1 x USB-C
    USB 3.2 Gen 2 (10 Gbps)
  • 2 x USB-A
    USB 3.2 Gen 2 (10 Gbps)
  • 1 x RJ-45
    1 Gbps
  • 1 x headphone jack
    Headphone/Microphone
Alienware X15 R2 Ports
Image Source: Dell
Left
  • 1 x Power/DC-in Port
Right
  • 1 x Headset port
Back
  • 1 x Thunderbolt 4
    Supports USB 3.2 Gen 2, DisplayPort 1.4, and PD output 15W (5V/3A).
  • 1 x USB-C
    Supports USB 3.2 Gen 2, DisplayPort 1.4, and PD output 15W (5V/3A).
  • 1 x USB-A
    Supports USB 3.2 Gen 1 with PowerShare
  • 1 x HDMI 2.1
    Supports up to 4K@120Hz display out.
  • 1 x MicroSD Card Slot

Internal Specs

MSI GS66 StealthAlienware X15 R2
Processor
  1. 10th Gen Intel® Core™ i7-10750H
    6 cores, 12 threads, 2.60 → 5.00 GHz, 12MB SmartCache, 45W
  2. 10th Gen Intel® Core™ i7-10875H
    8 cores, 16 threads, 2.30 → 5.10 GHz, 16MB SmartCache, 45W
  3. 10th Gen Intel® Core™ i9-10980HK
    8 cores, 16 threads, 2.40 → 5.30 GHz, 16MB SmartCache, 45W
  1. 12th Gen Intel® Core™ i7-12700H
    14 cores, 20 threads, 2.30 → 4.70 GHz, 24MB SmartCache, 45W
  2. 12th Gen Intel® Core™ i9-12900H
    14 cores, 20 threads, 2.50 → 5.00 GHz, 24MB SmartCache, 45W
Integrated Graphics
  1. 10th Gen Intel® Core™ i7-10750H
    Intel® UHD Graphics 630
    24 Execution Units, 350 → 1150 MHz
  2. 10th Gen Intel® Core™ i7-10875H
    Intel® UHD Graphics 630
    24 Execution Units, 350 → 1200 MHz
  3. 10th Gen Intel® Core™ i9-10980HK
    Intel® UHD Graphics 630
    24 Execution Units, 350 → 1250 MHz
  1. 12th Gen Intel® Core™ i7-12700H
    Intel® Iris® Xe Graphics
    96 Execution Units, 400 → 1400 MHz
  2. 12th Gen Intel® Core™ i9-12900H
    Intel® Iris® Xe Graphics
    96 Execution Units, 400 → 1450 MHz
MemoryUp to 64GB 3200MHz Dual-channel DDR4 SDRAM
2 x SO-DIMM slots.
  • 16GB 32GB
    Dual Channel LPDDR5 5200MHz
Memory Slots
  • Onbaord memory
Memory Configurations
  • Speed: 5200MHz
  • Memory Type: Dual-channel LPDDR5
  • Minimum Memory: 16 GB
  • Maximum Memory: 32 GB
Discrete Graphics
GS66 Stealth 10SGS
  • NVIDIA® GeForce® RTX 2080 SUPER™ With Max-Q Design
    Video memory: 8GB GDDR6 VRAM.
GS66 Stealth 10SFS
  • NVIDIA® GeForce® RTX 2070 SUPER™ With Max-Q Design
    Video memory: 8GB GDDR6 VRAM.
GS66 Stealth 10SF
  • NVIDIA® GeForce RTX™ 2070 With Max-Q Design
    Video memory: 8GB GDDR6 VRAM.
GS66 Stealth 10SE
  • NVIDIA® GeForce RTX™ 2060
    Video memory: 6GB GDDR6 VRAM.
GS66 Stealth 10SD
  • NVIDIA® GeForce® GTX 1660 Ti
    Video memory: 6GB GDDR6 VRAM.
  • NVIDIA® GeForce RTX™ 3060 - 6GB GDDR6
  • NVIDIA® GeForce RTX™ 3070 Ti - 6GB GDDR6
  • NVIDIA® GeForce RTX™ 3080 Ti - 6GB GDDR6
* All configurations include 8-phase HyperEfficient graphics voltage regulation.
Storage
  • 1x M.2 SSD slot (NVMe PCIe Gen3)
  • 1x M.2 SSD Combo slot (NVMe PCIe Gen3 / SATA)
  • Storage slots: 2 x M.2 2280 PCIe slots
Single Storage Configuration
  • 256GB 512GB 1TB 2TB
    PCIe NVMe M.2 SSD
Dual Storage Configuration
  • 512GB 1TB 2TB 4TB
    RAID-0 (2 x PCIe NVMe M.2 SSD)

Connectivity

MSI GS66 StealthAlienware X15 R2
Wi-Fi802.11 AX Wi-Fi 6Killer Wi-Fi 6E AX1675
Dual Band 2.4 GHz/5 GHz WiFi 6E 802.11a/b/g/n/ac/ax
BluetoothBluetooth 5.1Bluetooth 5.2
Ethernet
  • Killer Gigabit LAN
    Speed: 10/100/1000 Mbps.
2.5Gbps Ethernet NIC via included Type-C to RJ-45 port dongle

Battery

MSI GS66 StealthAlienware X15 R2
Size99.9 Wh (4-cell Li-Polymer battery)87 WHr, 6-cell smart lithium-ion battery
Power Supply
MSI GS66 Stealth 10SD/SE
  • 180W slim power adapter
MSI GS66 Stealth 10SF/SFS/SGS
  • 230W slim power adapter
240W
power adapter.

Software

MSI GS66 StealthAlienware X15 R2
OSWindows 10 HomeWindows 11
Home Pro
Built-in Apps-Alienware Command Center
  • Dashboard navigates all features, including themes, system performance, and overclocking
  • Five Tailored Power States
    full speed performance balanced quiet battery saver
  • Game Library to manage titles from multiple services
  • FX supports full RBG values up to 16.8 million colors
  • Power Management adjusts power plans with a game
  • Overclocking controls system performance and overclocking profiles
  • Sound Center dials in the perfect sound by managing sound profiles, audio effects, and Audio Recon

Camera & Audio

MSI GS66 StealthAlienware X15 R2
Camera
  • Front-facing camera
    720p (1280 x 720 HD) camera.
  • IR camera for Windows Hello support.
  • Front-facing camera.
    Alienware HD (1280x720 resolution) camera.
  • Optional Windows Hello IR support.
Audio
  • 2x 2W Speaker
  • Sound by Dynaudio and Duo wave speaker
  • Array Microphone
  • Speakers:
    • Stereo speakers with Dolby Atmos
  • Microphone:
    • Dual-array microphones

Misc

MSI GS66 StealthAlienware X15 R2
Sensors-Windows Hello IR Camera
Security
  • Enterprise-grade protection with Windows Hello face sign-in
Windows Hello IR camera for Facial Biometrics
Warranty-1 Year Hardware Service with Onsite/In-Home Service After Remote Diagnosis

Key Features

MSI GS66 StealthAlienware X15 R2
At Glance
Released in
2020
16:9 FHD
15.6”
1080p 300Hz
Weight
4.62 lb
2.10 kg
Up to
Intel Core i9-10980HK
8C/16T, 2.40 → 5.30 GHz
Geekbench 5
1,223
Single Core
Geekbench 5
7,013
Multi-Core
With integrated
Intel® UHD Graphics 630
24 Execution Units, 350 → 1250 MHz
Upgradable up to
64GB
3200 MHz DDR4
MSI GS66 Stealth Ports
NVIDIA GeForce
RTX 2080 SUPER
8GB GDDR6 with Max-Q
Released in Early
2022
16:9 QHD
15.6”
1440p 240Hz
Weight
5.15 lb
2.34 kg
Up to
Intel Core i9-12900H
14C/20T, 2.50 → 5.00 GHz
Geekbench 5
1,758
Single Core
Geekbench 5
12,027
Multi-Core
With integrated
Intel® Iris® Xe Graphics
96 Execution Units, 400 → 1450 MHz
Configurable up to
32GB
5200 MHz LPDDR5
Alienware X15 R2 Ports
Nvidia GeForce
RTX 3080 Ti
16GB GDDR6

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