Lenovo Legion Slim 7i (15”, Intel, 2020) vs. Alienware M15 R5: Which is better?

Here is a side by side comparison between Lenovo Legion Slim 7i (15”, Intel, 2020) and Alienware M15 R5 specs including CPU, RAM, storage, battery, display, and more.

Lenovo Legion Slim 7i (15”, Intel, 2020) Pros

Reasons that Lenovo Legion Slim 7i (15”, Intel, 2020) is better than Alienware M15 R5.

About 24% lighter

Lenovo Legion Slim 7i (15”, Intel, 2020) weighed 4.1 pounds, 24% lighter than the 5.34 pounds Alienware M15 R5.

WeightLenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
Pound
4.1 lbs.
5.34 lbs.
Kilogram
1.86 kg
2.42 kg

Alienware M15 R5 Pros

Reasons that Alienware M15 R5 is better than Lenovo Legion Slim 7i (15”, Intel, 2020).

Slightly faster CPU performance

AMD Ryzen 9-5900HX inside Alienware M15 R5 has a 9% better multi-core CPU performance score than the Intel Core i9-10980HK inside Lenovo Legion Slim 7i (15”, Intel, 2020).

Geekbench 5 multi-core score
Alienware M15 R5 - AMD Ryzen 9-5900HX
7,663
Alienware M15 R5 - AMD Ryzen 7-5800H
7,098
Lenovo Legion Slim 7i (15”, Intel, 2020) - Intel Core i9-10980HK
7,013
Lenovo Legion Slim 7i (15”, Intel, 2020) - Intel Core i7-10875H
6,874
Lenovo Legion Slim 7i (15”, Intel, 2020) - Intel Core i7-10870H
6,596
Lenovo Legion Slim 7i (15”, Intel, 2020) - Intel Core i7-10750H
5,412
Lenovo Legion Slim 7i (15”, Intel, 2020) - Intel Core i5-10300H
3,747

Key Similars

Similar characteristics share between Lenovo Legion Slim 7i (15”, Intel, 2020) and Alienware M15 R5.

Supports the same maximum memory size of up to 32GB

Both laptops supports up to 32GB of system memory.

Max system memory size
Lenovo Legion Slim 7i (15”, Intel, 2020)
32 GB
Alienware M15 R5
32 GB
Uses the same memory type and speed

Both laptops supports the same 3200MHz DDR4 RAM.

Memory type and speed
Lenovo Legion Slim 7i (15”, Intel, 2020) - DDR4
3,200 MHz
Alienware M15 R5 - DDR4
3,200 MHz
Upgradable memory

Both laptops come with available RAM slots that allow you to replace or upgrade when needed.

MemoryLenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
Slots
x1
x2
TypeDDR4DDR4

Prices

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

Lenovo Legion Slim 7i (15”, Intel, 2020) Price
Lenovo Legion Slim 7i Gen 8 16" Gaming Laptop (2023 Model) - Intel Core i7-13700H 14C, NVIDIA GeForce RTX 4060, 16GB RAM, 1TB M.2 NVMe SSD, 16.0" IPS QHD+ 500 nits 240Hz, Windows 11 Home
Lenovo Legion Slim 7i Gen 8 16" Gaming Laptop (2023 Model) - Intel Core i7-13700H 14C, NVIDIA GeForce RTX 4060, 16GB RAM, 1TB M.2 NVMe SSD, 16.0" IPS QHD+ 500 nits 240Hz, Windows 11 Home
By Lenovo
$1,699.95
Lenovo Legion Pro 7i Gen 9 16" Gaming Laptop (2024 Model) Intel Core i9-14900HX 24C, NVIDIA GeForce RTX 4090 16GB, 32GB RAM, 2TB (1TB+1TB) NVMe SSD, 16.0" IPS QHD+ 500 nits 240Hz, Windows 11 Home
Lenovo Legion Pro 7i Gen 9 16" Gaming Laptop (2024 Model) Intel Core i9-14900HX 24C, NVIDIA GeForce RTX 4090 16GB, 32GB RAM, 2TB (1TB+1TB) NVMe SSD, 16.0" IPS QHD+ 500 nits 240Hz, Windows 11 Home
By Lenovo
$3,295.00
Lenovo Legion Pro 7i 16" QHD+ 500nits Gaming Laptop 240Hz Intel Core i9-13900HX 16GB RAM 1TB SSD NVIDIA GeForce RTX 4080 12GB Windows 11 Onyx Grey
Lenovo Legion Pro 7i 16" QHD+ 500nits Gaming Laptop 240Hz Intel Core i9-13900HX 16GB RAM 1TB SSD NVIDIA GeForce RTX 4080 12GB Windows 11 Onyx Grey
By Lenovo
$2,299.99
Alienware M15 R5 AMD Ryzen Price
Alienware M15 R5 Gaming Laptop, 15.6 inch FHD 360Hz 1ms G-SYNC Display, AMD Ryzen R9 5900HX, GeForce RTX 3070, 64GB RAM, 2TB NVMe SSD, Killer WiFi, RGB Keyboard, Windows 11, Dark Side of The Moon
Alienware M15 R5 Gaming Laptop, 15.6 inch FHD 360Hz 1ms G-SYNC Display, AMD Ryzen R9 5900HX, GeForce RTX 3070, 64GB RAM, 2TB NVMe SSD, Killer WiFi, RGB Keyboard, Windows 11, Dark Side of The Moon
By Dell
$2,659.00
Dell Alienware m15 R5 Ryzen Edition Gaming Laptop (2021) | 15.6" FHD | Core Ryzen 9-1TB SSD - 32GB RAM - RTX 3070 | 12 Cores @ 4.7 GHz - 8GB GDDR6
Dell Alienware m15 R5 Ryzen Edition Gaming Laptop (2021) | 15.6" FHD | Core Ryzen 9-1TB SSD - 32GB RAM - RTX 3070 | 12 Cores @ 4.7 GHz - 8GB GDDR6
By Dell
$2,584.00
Dell Alienware m15 R5 Ryzen Edition Gaming Laptop (2021) | 15.6" 360Hz FHD | Core Ryzen 7-512GB SSD Hard Drive - 16GB RAM - RTX 3070 | 8 Cores @ 4.4 GHz - 8GB GDDR6 Win 11 Home (Renewed)
Dell Alienware m15 R5 Ryzen Edition Gaming Laptop (2021) | 15.6" 360Hz FHD | Core Ryzen 7-512GB SSD Hard Drive - 16GB RAM - RTX 3070 | 8 Cores @ 4.4 GHz - 8GB GDDR6 Win 11 Home (Renewed)
By Dell
$1,755.99

Availability

Lenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
Released20202021
Release DateAnnounced on December 04, 2020Announced on April 20, 2021
Generations-

Exterior

Lenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
Dimensions14.01 x 9.84 x 0.6 - 0.7 inches (356 x 250 x 15.9 - 17.9 mm)14.02” x 10.73” x 0.47 - 0.76” (356.20 x 272.50 x 12 - 19.25 mm)
WeightStarting at 4.1 lbs (1.86 kg)5.34 - 5.93 lbs (2.42 - 2.69 kg)
Colors
Slate grey
Dark Side of the Moon with High Endurance Clear Coat and Silky Smooth Finish
Keyboard and Trackpad
  • Keyboard
    • 6-row, spill-resistant, multimedia Fn keys, numeric keypad.
  • Keyboard Backlight
    • RGB LED backlight
    • White LED backlight
  • Touchpad
    • Buttonless glass surface multi-touch touchpad supports Precision TouchPad (PTP).
  • Keyboard
    • Alienware mSeries 4-Zone AlienFX RGB keyboard.
    • RGB per-key backlit Cherry mechanical keyboard.
    • AlienFX lighting
    • Includes anti-ghosting and N-key rollover technology
    • 1.8mm key travel
    • 0.2mm-dish concave key design
  • Touchpad
    • 4.13 x 2.36 in (105 mm x 80 mm) precision touchpad with multi-touch gesture support.

Display

Lenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
Size15.6 Inches15.6 Inches
Info
  • 15.6" FHD 60Hz
    1920 x 1080 IPS 60 Hz 100% sRGB Dolby Vision® Supported 300 nits
  • 15.6" FHD 144Hz
    1920 x 1080 IPS 144 Hz Up to 5 ms Response Time 100% sRGB Dolby Vision® Supported 300 nits
  • 15.6" UHD 60Hz
    3840 x 2160 IPS 60 Hz 100% Adobe RGB VESA DisplayHDR 400 Certified Dolby Vision® Supported 500 nits
  • 15.6” FHD with 165Hz
    1920 x 1080 141 PPI 9ms 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 5ms response time 300 nits 16:9 100% sRGB color gamut 1000:1 Anti-glare WVA 8W
  • 15.6” QHD with 240Hz
    2560 x 1440 188 PPI 9ms response time 400 nits 16:9 99% DCI-P3 color gamut 1000:1 Anti-glare WVA 10W

Ports

Lenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
  • 1 x Thunderbolt™ 3
    Supports USB 3.2 Gen 2, DisplayPort™ 1.4, and Power Delivery 100W.
  • 1 x USB-A 3.2 Gen 2
  • 1 x USB-A 3.2 Gen 2 (Always On)
  • 1 x 4-in-1 Full-size SD Card Reader
  • 1 x Audio jack
  • 1 x Power adapter
Alienware M15 R5 Ports
Image Source: Dell
  • 1 x USB-C 3.2 Gen 2 with DisplayPort
  • 2 x USB-A 3.2 Gen 1 Port
  • 1 x USB-A 3.2 Gen 1 port with PowerShare
  • 1 x RJ-45
  • 1 x HDMI 2.1
    Supports up to 4K@120Hz display out.
  • 1 x Headset port
  • 1 x Power/DC-in Port

Internal Specs

Lenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
Processor
  1. 10th Gen Intel® Core™ i5-10300H
    4 cores, 8 threads, 2.50 → 4.50 GHz, 8MB SmartCache, 45W
  2. 10th Gen Intel® Core™ i7-10750H
    6 cores, 12 threads, 2.60 → 5.00 GHz, 12MB SmartCache, 45W
  3. 10th Gen Intel® Core™ i7-10870H
    8 cores, 16 threads, 2.20 → 5.00 GHz, 16MB SmartCache, 45W
  4. 10th Gen Intel® Core™ i7-10875H
    8 cores, 16 threads, 2.30 → 5.10 GHz, 16MB SmartCache, 45W
  5. 10th Gen Intel® Core™ i9-10980HK
    8 cores, 16 threads, 2.40 → 5.30 GHz, 16MB SmartCache, 45W
  1. AMD Ryzen™ 7 5800H
    8 cores, 16 threads, 3.20 → 4.40 GHz, 4MB L2 Cache, 16MB L3 Cache, 45W
  2. AMD Ryzen™ 9 5900HX
    8 cores, 16 threads, 3.30 → 4.60 GHz, 4MB L2 Cache, 16MB L3 Cache, 45W
Integrated Graphics
  1. 10th Gen Intel® Core™ i5-10300H
    Intel® UHD Graphics 630
    24 Execution Units, 350 → 1050 MHz
  2. 10th Gen Intel® Core™ i7-10750H
    Intel® UHD Graphics 630
    24 Execution Units, 350 → 1150 MHz
  3. 10th Gen Intel® Core™ i7-10870H
    Intel® UHD Graphics 630
    24 Execution Units, 350 → 1200 MHz
  4. 10th Gen Intel® Core™ i7-10875H
    Intel® UHD Graphics 630
    24 Execution Units, 350 → 1200 MHz
  5. 10th Gen Intel® Core™ i9-10980HK
    Intel® UHD Graphics 630
    24 Execution Units, 350 → 1250 MHz
  1. AMD Ryzen™ 7 5800H
    AMD Radeon™ Graphics
    8 Graphics Cores, 2000 MHz
  2. AMD Ryzen™ 9 5900HX
    AMD Radeon™ Graphics
    8 Graphics Cores, 2100 MHz
Memory
8GB 16GB 32GB
2933 MHz or 3200 MHz DDR4 Memory
  • Memory Slots
    • 1 x Onboard Memory
    • 1 x SO-DIMM DDR4 Slot
8 GB 16 GB 32 GB
3200MHz Dual-channel DDR4 SDRAM.
2 x SO-DIMM slots.
Discrete Graphics
  • NVIDIA® GeForce® GTX 1650 Ti
    4GB GDDR6
  • NVIDIA® GeForce® GTX 1660 Ti
    Max-Q Design, 6GB GDDR6
  • NVIDIA® GeForce RTX™ 2060
    Max-Q Design, 6GB GDDR6
  • Supports External eGPU Support
  • NVIDIA® GeForce RTX™ 3050 Ti
    4GB GDDR6 VRAM.
  • NVIDIA® GeForce RTX™ 3060
    6GB GDDR6 VRAM.
  • NVIDIA® GeForce RTX™ 3070
    8GB GDDR6 VRAM.
Storage
512 GB 1TB 2TB
M.2 2280 SSD
  • 2 x PCIe NVMe, PCIe 3.0 x4 slots
2 x M.2 2230/2280 slots (Up to 2TB each)

Connectivity

Lenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
Wi-FiKiller Wi-Fi 6 AX1650, 802.11ax 2x2 Wi-Fi + Bluetooth 5.1, M.2 CardRivet Killer Wi-Fi 6 AX1650x
Dual Band 2.4 GHz/5 GHz Up to 2400 Mbps WiFi 6 802.11a/b/g/n/ac/ax
BluetoothBluetooth 5.1Bluetooth 5.2
Ethernet-Gigabit Ethernet Controller
Transfer rate: 10/100/1000/2500 Mbps

Battery

Lenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
Size71 WHr (Integrated 3-Cell Li-Polymer battery)
Supports Rapid Charge Boost (get 2 hours of runtime with a 15-minute charge)
  • 56 WHr, 3-cell smart lithium-ion battery
  • 86 WHr, 6-cell smart lithium-ion battery
Battery LifeUp to 5.8 hours
Tested with MobileMark® 2018
-
Power Supply
170W 230W
Slim tip AC adapter.
180W 240W
power adapter.

Software

Lenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
OS
  • Windows 10 Home 64
  • Windows 10 Pro 64
  • FreeDOS
  • No operating system
Windows 10 Home Windows 10 Pro
Upgradable to Windows 11
Built-in Apps
Lenovo Vantage Dolby Atmos® Speaker System Dolby Vision® McAfee® Antivirus
  • Alienware Command Center
    Supports AlienFX lighting, Game
    Library with auto-tune game profile functionality.
  • Alienware Adrenalin
  • Alienware Mobile Connect
  • Microsoft Office 365 (30-day trial)

Camera & Audio

Lenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
CameraTop-placed Built-in HD Webcam (720p) with Privacy ShutterFront-facing camera
Alienware HD (1280x720 resolution) camera.
Audio
  • 2 x 2W Dolby Atmos® Speaker System for Gaming
  • Dual array microphone
  • Controller: Realtek ALC3254
    • 7.1 Digital Audio out using HDMI out connection
    • Alienware Sound Center via Alienware Command Center
  • Speakers:
    • 2 x 2W speakers
  • Microphone:
    • Dual-array microphones

Misc

Lenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
Sensors
  • Fingerprint Reader Combined with Power Button
-
Security
  • Fingerprint Reader
    • Touch style fingerprint reader on the power button
  • BIOS Security
    • Power-on password
    • Supervisor password
  • Other Security
    • Camera privacy shutter
-
In the box
  • Lenovo Legion Slim 7i 15”
  • AC adapter
  • Internal Battery
  • Quick Start Guide
-
Warranty1-year depot service-

Key Features

Lenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5
At Glance
Released in
2020
16:9 4K UHD
15.6”
2160p 60Hz
Weight
4.1 lb
1.86 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
32GB
3200 MHz DDR4
NVIDIA GeForce
RTX 2060
6GB GDDR6 with Max-Q
Released in Early
2021
16:9 QHD
15.6”
1440p 240Hz
Weight
5.34 lb
2.42 kg
Up to
AMD Ryzen 9-5900HX
8C/16T, 3.30 → 4.60 GHz
Geekbench 5
1,416
Single Core
Geekbench 5
7,663
Multi-Core
With integrated
AMD Radeon™ Graphics
8 Graphics Cores, 2100 MHz
Upgradable up to
32GB
3200 MHz DDR4
Alienware M15 R5 Ports
Nvidia GeForce
RTX 3070
8GB GDDR6

Comparison Summary

Lenovo Legion Slim 7i (15”, Intel, 2020) vs. Alienware M15 R5

Lenovo has released the Legion Slim 7i (15”, Intel, 2020), a 15.6-inch machine, in 2020. It is powered by up to an octa-core Intel Core i9-10980HK with a boost clock speed up to 5.30 GHz. The laptop has a dedicated GPU option up to NVIDIA GeForce RTX 2060 with 6GB GDDR6 with Max-Q.

On the other hand, we have the 15.6-inch Alienware M15 R5 was introduced by Dell about a year later in early-2021. It comes with up to an octa-core AMD Ryzen 9-5900HX with a boost clock speed up to 4.60 GHz. It has a dedicated GPU option up to Nvidia GeForce RTX 3070 with 8GB GDDR6.

Geekbench 5 Single Core

Lenovo Legion Slim 7i (15”, Intel, 2020)1
10th Gen Intel® Core™ i5-10300H1,06174.93%
2
10th Gen Intel® Core™ i7-10750H1,13480.08%
3
10th Gen Intel® Core™ i7-10870H1,15981.85%
4
10th Gen Intel® Core™ i7-10875H1,19284.18%
5
10th Gen Intel® Core™ i9-10980HK1,22386.37%
Alienware M15 R51
AMD Ryzen™ 7 5800H1,33494.21%
2
AMD Ryzen™ 9 5900HX1,416100.00%
01,416

Geekbench 5 Multi Core

Lenovo Legion Slim 7i (15”, Intel, 2020)1
10th Gen Intel® Core™ i5-10300H3,74748.90%
2
10th Gen Intel® Core™ i7-10750H5,41270.63%
3
10th Gen Intel® Core™ i7-10870H6,59686.08%
4
10th Gen Intel® Core™ i7-10875H6,87489.70%
5
10th Gen Intel® Core™ i9-10980HK7,01391.52%
Alienware M15 R51
AMD Ryzen™ 7 5800H7,09892.63%
2
AMD Ryzen™ 9 5900HX7,663100.00%
07,663

Both Lenovo Legion Slim 7i (15”, Intel, 2020) and Alienware M15 R5 have the same 15.6-inch display size. In addition, The Lenovo Legion Slim 7i (15”, Intel, 2020) weighs 4.1 lbs. about 30% lighter than the 5.34 lbs. Alienware M15 R5. Moreover, measured at 14.01” x 9.84” x 0.7”, the Lenovo Legion Slim 7i (15”, Intel, 2020) is considerably more portable than the Alienware M15 R5 at 14.02” x 10.73” x 0.76”.

Lenovo Legion Slim 7i (15”, Intel, 2020)Alienware M15 R5

Moving over to upgradability, Lenovo claims that the Lenovo Legion Slim 7i (15”, Intel, 2020) supports up to 32GB 3200 MHz DDR4 memory that you can upgrade with memory module slots on the motherboard. It also comes with two M.2 slots that users can easily upgrade and install an additional SSD to expand the storage on the device.

For Alienware M15 R5, it supports up to 32GB 3200 MHz DDR4 memory that you can upgrade with two memory module slots on the motherboard. It also has two M.2 slots that users can easily swap or add an extra SSD to get extra space when needed.

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