2021 ROG Flow X13 vs. 2021 ROG Zephyrus G15: Which is better?

Here is a side by side comparison between 2021 ROG Flow X13 and 2021 ROG Zephyrus G15 specs including CPU, RAM, storage, battery, display, and more.

2021 ROG Flow X13 Pros

Reasons that 2021 ROG Flow X13 is better than 2021 ROG Zephyrus G15.

Slightly faster CPU performance

AMD Ryzen 9-5980HS inside 2021 ROG Flow X13 has a 8% better multi-core CPU performance score than the AMD Ryzen 9-5900HS inside 2021 ROG Zephyrus G15.

Geekbench 5 multi-core score
2021 ROG Flow X13 - AMD Ryzen 9-5980HS
7,773
2021 ROG Flow X13 - AMD Ryzen 9-5900HS
7,162
2021 ROG Zephyrus G15 - AMD Ryzen 9-5900HS
7,162
2021 ROG Zephyrus G15 - AMD Ryzen 7-5800HS
6,454
Supports faster memory

The 2021 ROG Flow X13 supports a faster memory speed than the 2021 ROG Zephyrus G15. It supports up to 4267MHz versus 3200MHz of system memory on the 2021 ROG Zephyrus G15.

Memory type and speed
2021 ROG Flow X13 - LPDDR4X
4,267 MHz
2021 ROG Zephyrus G15 - DDR4
3,200 MHz
About 32% lighter

The 2021 ROG Flow X13 weighed 2.87 pounds, 32% lighter than the 4.19 pounds 2021 ROG Zephyrus G15.

Weight2021 ROG Flow X132021 ROG Zephyrus G15
Pound
2.87 lbs.
4.19 lbs.
Kilogram
1.30 kg
1.90 kg

2021 ROG Zephyrus G15 Pros

Reasons that 2021 ROG Zephyrus G15 is better than 2021 ROG Flow X13.

Supports larger memory

The 2021 ROG Zephyrus G15 supports a larger memory capacity than the 2021 ROG Flow X13. It supports up to 48GB versus 32GB of system memory on the 2021 ROG Flow X13.

Max system memory size
2021 ROG Zephyrus G15
48 GB
2021 ROG Flow X13
32 GB
Upgradable memory

The 2021 ROG Zephyrus G15 comes with one SODIMM slot that allow you to replace or upgrade when needed. On the flip side, you can't upgrade RAM on the 2021 ROG Flow X13 since it has onboard memory.

Memory2021 ROG Flow X132021 ROG Zephyrus G15
Slots
Onboard
x1
TypeLPDDR4XDDR4
16% larger display

The 2021 ROG Zephyrus G15 has a 15.6-inch screen size 16% larger than the 13.4-inch 2021 ROG Flow X13.

Display size
2021 ROG Zephyrus G15
15.6-inch
2021 ROG Flow X13
13.4-inch
Has four more ports and slots

The 2021 ROG Zephyrus G15 has more ports and slots count than the 2021 ROG Flow X13. It has ten versus six amount of ports and slots on the 2021 ROG Flow X13.

Ports2021 ROG Flow X132021 ROG Zephyrus G15
HDMIYesYes
headphone jackYesYes
lock slotNoYes
microSD card slotNoYes
power portNoYes
RJ-45NoYes
ROG XG Mobile InterfaceYesNo
USB-AYesYes x2
USB-CYes x2Yes x2
Total610
More versatile connectivity

The 2021 ROG Zephyrus G15 has better versatile I/O connectivity than the 2021 ROG Flow X13. It has seven versus four commonly used ports and slots on the 2021 ROG Flow X13.

Ports2021 ROG Flow X132021 ROG Zephyrus G15
HDMIYesYes
headphone jackYesYes
USB-AYesYes
USB-CYesYes
microSD card slotNoYes
power portNoYes
RJ-45NoYes

Prices

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

2021 ROG Flow X13 Price
Asus ROG Flow X13 Gaming 2-in-1 Laptop | 13.4" FHD+ 120Hz Glossy Touch 100% sRGB | AMD 8-Core Zen 4 Ryzen 9 7940HS (>i9-12900H) | 16GB DDR5 512GB SSD | Backlit FHD IR Camera Win11 Black + HDMI Cable
Asus ROG Flow X13 Gaming 2-in-1 Laptop | 13.4" FHD+ 120Hz Glossy Touch 100% sRGB | AMD 8-Core Zen 4 Ryzen 9 7940HS (>i9-12900H) | 16GB DDR5 512GB SSD | Backlit FHD IR Camera Win11 Black + HDMI Cable
By Asus
$899.00
ASUS ROG Flow Z13 (2023) Gaming Laptop Tablet, 13.4” Nebula Display 16:10 QHD 165Hz, GeForce RTX 4050, Intel Core i9-13900H, 16GB LPDDR5, 1TB PCIe SSD, Wi-Fi 6E, Windows 11, GZ301VU-DS94,Black
ASUS ROG Flow Z13 (2023) Gaming Laptop Tablet, 13.4” Nebula Display 16:10 QHD 165Hz, GeForce RTX 4050, Intel Core i9-13900H, 16GB LPDDR5, 1TB PCIe SSD, Wi-Fi 6E, Windows 11, GZ301VU-DS94,Black
By ASUS
$1,749.99
ASUS ROG Flow X13 Ultra Slim 2-in-1 Gaming Laptop, 13.4” 120Hz FHD+ Display, GeForce GTX 1650, AMD Ryzen 9 5900HS, 16GB LPDDR4X, 1TB PCIe SSD, Wi-Fi 6, Windows 10 Home, GV301QH-DS96
ASUS ROG Flow X13 Ultra Slim 2-in-1 Gaming Laptop, 13.4” 120Hz FHD+ Display, GeForce GTX 1650, AMD Ryzen 9 5900HS, 16GB LPDDR4X, 1TB PCIe SSD, Wi-Fi 6, Windows 10 Home, GV301QH-DS96
By ASUS
$1,139.00
$1,359.99 16% OFF
2021 ROG Zephyrus G15 Price
Asus ROG Zephyrus G15 Gaming Laptop 15.6" WQHD IPS 165Hz (100% DCI-P3) AMD Octa-Core Ryzen 9 6900HS (>i7-11370H) 16GB RAM 512GB SSD GeForce RTX 3060 6GB Graphic USB-C Backlit Win11 Black + HDMI Cable
Asus ROG Zephyrus G15 Gaming Laptop 15.6" WQHD IPS 165Hz (100% DCI-P3) AMD Octa-Core Ryzen 9 6900HS (>i7-11370H) 16GB RAM 512GB SSD GeForce RTX 3060 6GB Graphic USB-C Backlit Win11 Black + HDMI Cable
By Asus
$1,179.00
ASUS ROG Zephyrus G15 Ultra Slim Gaming Laptop, 15.6” 165Hz QHD Display, GeForce RTX 3080, AMD Ryzen 9 5900HS, 16GB DDR4, 1TB PCIe NVMe SSD, Wi-Fi 6, Windows 10, Eclipse Gray, GA503QS-BS96Q
ASUS ROG Zephyrus G15 Ultra Slim Gaming Laptop, 15.6” 165Hz QHD Display, GeForce RTX 3080, AMD Ryzen 9 5900HS, 16GB DDR4, 1TB PCIe NVMe SSD, Wi-Fi 6, Windows 10, Eclipse Gray, GA503QS-BS96Q
By ASUS
$1,329.99
$2,099.99 37% OFF
Asus ROG Zephyrus G15 Gaming Laptop | 15.6" WQHD 165Hz 100% DCI-P3 | AMD 8-Core Ryzen 9 6900HS (>i7-11370H) | 16GB DDR5 512GB+1TB SSD | GeForce RTX 3060 6GB | USB-C Backlit Win11 + HDMI Cable
Asus ROG Zephyrus G15 Gaming Laptop | 15.6" WQHD 165Hz 100% DCI-P3 | AMD 8-Core Ryzen 9 6900HS (>i7-11370H) | 16GB DDR5 512GB+1TB SSD | GeForce RTX 3060 6GB | USB-C Backlit Win11 + HDMI Cable
By Asus
$1,249.00

Availability

2021 ROG Flow X132021 ROG Zephyrus G15
Released20212021
Release DateAnnounced on January 13, 2021 (CES 2021)-
Applicable Models-
  • 2021 ROG Zephyrus G15
  • ROG Zephyrus G15 (2021)
  • ROG Zephyrus G15 GA503
  • ROG Zephyrus G15 GA503QC
  • ROG Zephyrus G15 GA503QE
  • ROG Zephyrus G15 GA503QR
Generations

Exterior

2021 ROG Flow X132021 ROG Zephyrus G15
Dimensions11.77 x 8.74 x 0.62” (299 x 222 x 15.8 mm)13.98” x 9.57” x 0.78” (355 x 243 x 19.9 mm)
Weight2.87 lbs (1.30 kg)4.19 lbs (1.90 kg)
Colors
Black
Eclipse Gray Moonlight White
Keyboard and Trackpad
  • Full size 15” white backlit chicklet keyboard
  • 1.7mm key travel
  • Hotkeys:
    Volume up Volume down Microphone mute ROG Armoury Crate
  • N-KEY rollover
  • Full-size backlit keyboard
    1.7 mm key travel 20M key press lifetime N-Key Rollover
  • Hotkeys 
    Volume down volume up mute Armoury Crate
  • Touchpad
    20% larger 40% faster lower latency

Display

2021 ROG Flow X132021 ROG Zephyrus G15
Size13.4 Inches15.6 Inches
Info
  • 13.4” WQUXGA 60Hz
    16:10 3840 x 2400 60Hz 116% sRGB 86% Adobe RGB 85% DCI-P3 Pantone Validated Touch Screen IPS Level Anti-Glare Adaptive-Sync Pantone Validated
  • 13.4” WUXGA 120Hz
    16:10 1920 x 1200 120Hz 100% sRGB 75% Adobe RGB 75% DCI-P3 Pantone Validated Touch Screen IPS Level Anti-Glare Adaptive-Sync Pantone Validated
  • 15.6” WQHD 165Hz
    16:9 2560 x 1440 165Hz 3ms 100% DCI-P3 Non-touch IPS Level Anti-Glare FreeSync Pantone Validated
  • 15.6” FHD 144Hz
    16:9 1920 x 1080 360Hz 3ms 62.5% sRGB 47.34% Adobe RGB Non-touch IPS Level Anti-Glare FreeSync

Ports

2021 ROG Flow X132021 ROG Zephyrus G15
2021 ROG Flow X13 Ports
Image Source: ASUS
Left (4)
  • 1 x ROG XG Mobile Interface
    Exclusive interface with PCIe 3.0 x8 (Up to 63Gbps)
  • 1 x USB-C
    USB 3.2 Gen 2 (10 Gbps)
  • 1 x HDMI
    v2.0b
  • 1 x headphone jack
    Headphone/Microphone
Right (2)
  • 1 x USB-C
    USB 3.2 Gen 2 (10 Gbps), DisplayPort 1.4, Power Delivery
  • 1 x USB-A
    USB 3.2 Gen 2 (10 Gbps)
2021 ROG Zephyrus G15 Ports
Image Source: ASUS
Left (7)
  • 2 x USB-C
    USB 3.2 Gen 2 (10 Gbps), DisplayPort 1.4, Power Delivery 3.0
  • 1 x USB-A
    USB 3.2 Gen 2 (10 Gbps)
  • 1 x HDMI
    v2.0b
  • 1 x RJ-45
    1 Gbps
  • 1 x headphone jack
    Headphone/Microphone
  • 1 x power port
Right (3)
  • 1 x USB-A
    USB 3.2 Gen 2 (10 Gbps)
  • 1 x microSD card slot
    up to 312 MB/s transfer speed
  • 1 x lock slot

Internal Specs

2021 ROG Flow X132021 ROG Zephyrus G15
Processor
  1. AMD Ryzen™ 9 5900HS
    8 cores, 16 threads, 3.00 → 4.60 GHz, 4MB L2 Cache, 16MB L3 Cache, 35W
  2. AMD Ryzen™ 9 5980HS
    8 cores, 16 threads, 3.00 → 4.80 GHz, 4MB L2 Cache, 16MB L3 Cache, 35W
  1. AMD Ryzen™ 7 5800HS
    8 cores, 16 threads, 2.80 → 4.40 GHz, 4MB L2 Cache, 16MB L3 Cache, 35W
  2. AMD Ryzen™ 9 5900HS
    8 cores, 16 threads, 3.00 → 4.60 GHz, 4MB L2 Cache, 16MB L3 Cache, 35W
Integrated Graphics
  1. AMD Ryzen™ 9 5900HS
    AMD Radeon™ Graphics
    8 Graphics Cores, 2100 MHz
  2. AMD Ryzen™ 9 5980HS
    AMD Radeon™ Graphics
    8 Graphics Cores, 2100 MHz
  1. AMD Ryzen™ 7 5800HS
    AMD Radeon™ Graphics
    8 Graphics Cores, 2000 MHz
  2. AMD Ryzen™ 9 5900HS
    AMD Radeon™ Graphics
    8 Graphics Cores, 2100 MHz
Memory
16GB 32GB
Dual-Channel LPDDR4X 4266MHz Onboard Memory
16GB 32GB 48GB
Dual-Channel DDR4 3200MHz Memory.
1 x 16GB Onboard Memory and 1 x SODIMM slot
Discrete GraphicsNVIDIA® GeForce® GTX 1650
4GB GDDR6 VRAM (With ROG Boost up to 1255MHz at 35W (40W with Dynamic Boost)).
  • NVIDIA® GeForce RTX™ 3060
    6GB GDDR6 VRAM, with ROG Boost up to 1525MHz at 80W (95W with Dynamic Boost).
  • NVIDIA® GeForce RTX™ 3070
    8GB GDDR6 VRAM, with ROG Boost up to 1390MHz at 80W (100W with Dynamic Boost).
  • NVIDIA® GeForce RTX™ 3080
    8GB GDDR6 VRAM, with ROG Boost up to 1345MHz at 80W (100W with Dynamic Boost).
Storage
512GB 1TB
M.2 NVMe PCIe 3.0
512GB 1TB 2TB
M.2 NVMe PCIe 3.0.
2 x M.2 SSD slots, supports RAID-0.

Connectivity

2021 ROG Flow X132021 ROG Zephyrus G15
Wi-FiIntel® Wi-Fi 6 with Gig+ performance (802.11ax)Intel® Wi-Fi 6 with Gig+ performance (802.11ax)
BluetoothBluetooth 5.0Bluetooth 5.0
Ethernet- Gigabit LAN
Speed: 10/100/1000 Mbps.

Battery

2021 ROG Flow X132021 ROG Zephyrus G15
Size62 Wh 4-cell lithium-ion90 Wh (4-cell Lithium-ion)
Battery LifeUp to 10 hours
Video playback.
-
Power Supply100W USB-C power adaptor
  • 200W
      ø6.0 mm power adapter.
  • 100W
      USB-C power adapter.

Software

2021 ROG Flow X132021 ROG Zephyrus G15
OS
  • Windows 10 Home
  • Windows 10 Pro
  • Windows 10 Home
  • Windows 10 Pro
Built-in Apps
Armoury Crate GameVisual 1M Xbox Game Pass
Armoury Crate

Camera & Audio

2021 ROG Flow X132021 ROG Zephyrus G15
Camera Front-facing camera
Top-mount front camera, 0.92 Megapixels (1280 x 720 HD).
No Built-in camera.
Audio
  • 2x 1W speaker with Smart Amp Technology
  • Built-in array microphone
  • Two-Way AI Noise Cancelation
  • 4 x 2W woofer with Smart Amp Technology.
  • 2 x 2W tweeter.
  • Supports Dolby Atmos.
  • 3D array microphone.
  • Two-Way AI Noise Cancelation

Misc

2021 ROG Flow X132021 ROG Zephyrus G15
InkingSupports ASUS Pen.-
Security-
  • One-Touch Login
    Fingerprint on the power button.
  • Kensington Lock Slot
In the box-
  • FHD 1080P@60FPS external camera
    optional.
  • ROG Backpack
    optional.
  • ROG Delta headset
    optional.
  • ROG Chakram Core mouse P511
    optional.
  • ROG Impact Gaming Mouse
    optional.
  • TYPE-C, 100W AC Adapter
    Output: 20V DC, 5A, 100W, Input: 100~240V AC 50/60Hz universal (optional)

Key Features

2021 ROG Flow X132021 ROG Zephyrus G15
At Glance
Released in Early
2021
16:10
13.4”
1200p 120Hz
Weight
2.87 lb
1.30 kg
Up to
AMD Ryzen 9-5980HS
8C/16T, 3.00 → 4.80 GHz
Geekbench 5
1,450
Single Core
Geekbench 5
7,773
Multi-Core
With integrated
AMD Radeon™ Graphics
8 Graphics Cores, 2100 MHz
Configurable up to
32GB
4267 MHz LPDDR4X
2021 ROG Flow X13 Ports
NVIDIA GeForce
GTX 1650
4GB GDDR6
Released in Early
2021
16:9
15.6”
1440p 165Hz
Weight
4.19 lb
1.90 kg
Up to
AMD Ryzen 9-5900HS
8C/16T, 3.00 → 4.60 GHz
Geekbench 5
1,356
Single Core
Geekbench 5
7,162
Multi-Core
With integrated
AMD Radeon™ Graphics
8 Graphics Cores, 2100 MHz
Upgradable up to
48GB
3200 MHz DDR4
2021 ROG Zephyrus G15 Ports
Nvidia GeForce
RTX 3080
8GB GDDR6 80W TGP

Comparison Summary

2021 ROG Flow X13 vs. 2021 ROG Zephyrus G15

ASUS has released the ROG Flow X13, a 13.4-inch machine, in early-2021. It is powered by up to an octa-core AMD Ryzen 9-5980HS with a boost clock speed up to 4.80 GHz. The laptop has a dedicated GPU option up to NVIDIA GeForce GTX 1650 with 4GB GDDR6.

On the other hand, we have the 15.6-inch ROG Zephyrus G15 was introduced by ASUS around the same time in early-2021. It comes with up to an octa-core AMD Ryzen 9-5900HS with a boost clock speed up to 4.60 GHz. It has a dedicated GPU option up to Nvidia GeForce RTX 3080 with 8GB GDDR6 80W TGP.

Geekbench 5 Single Core

2021 ROG Flow X131
AMD Ryzen™ 9 5900HS1,35693.52%
2
AMD Ryzen™ 9 5980HS1,450100.00%
2021 ROG Zephyrus G151
AMD Ryzen™ 7 5800HS1,33492.00%
2
AMD Ryzen™ 9 5900HS1,35693.52%
01,450

Geekbench 5 Multi Core

2021 ROG Flow X131
AMD Ryzen™ 9 5900HS7,16292.14%
2
AMD Ryzen™ 9 5980HS7,773100.00%
2021 ROG Zephyrus G151
AMD Ryzen™ 7 5800HS6,45483.03%
2
AMD Ryzen™ 9 5900HS7,16292.14%
07,773

The 2021 ROG Flow X13 has a 13.4-inch display which is considerably smaller than the 15.6-inch 2021 ROG Zephyrus G15. In addition, The 2021 ROG Flow X13 weighs 2.87 lbs. about 45% lighter than the 4.19 lbs. 2021 ROG Zephyrus G15. Moreover, measured at 11.77” x 8.74” x 0.62”, the 2021 ROG Flow X13 is much more portable than the 2021 ROG Zephyrus G15 at 13.98” x 9.57” x 0.78”.

2021 ROG Flow X132021 ROG Zephyrus G15

There are a toal number of 6 ports and slots available on 2021 ROG Flow X13. That includes a ROG XG Mobile Interface, two USB-C ports, an HDMI port, a headphone jack, and a USB-A port. With that said, it has four ports and slots fewer than the 2021 ROG Zephyrus G15 that has two USB-C ports, two USB-A ports, an HDMI port, an RJ-45 port, a headphone jack, a power port, a microSD card slot, and a lock slot.

Moving over to upgradability, ASUS claims that the 2021 ROG Flow X13 supports up to 32GB 4267 MHz LPDDR4X memory. However, it has an onboard memory module that is not upgradable by the users.

For 2021 ROG Zephyrus G15, it supports up to 48GB 3200 MHz DDR4 memory that you can upgrade with one memory module slot 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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