GIGABYTE B650 UD AX
GIGABYTE B650 UD AX Specifications Review
GIGABYTE B650 UD AX by GIGABYTE is a Standard-ATX form factor motherboard based on the mid-range B650 chipset and AM5 socket, providing a balanced set of features and connectivity. It is designed to support DDR5 memory, with 4 slots, a maximum capacity of 256 GB, and an overclocking speed of up to 8000 MHz.
VRM Quality
The GIGABYTE B650 UD AX has a basic VRM configuration, delivering 60 A across 6 phases. Best for low-power CPUs (≤65 W TDP). Using high-wattage chips or overclocking could cause severe thermal issues and instability. Recommended for budget builds, office workstations, and media PCs.
See the VRM Appropriate CPU Specification Table at the bottom of this page for recommended CPU options.
Expansion and Storage Overview
The GIGABYTE B650 UD AX offers a balanced expansion and storage configuration with PCIe 4.0 support, meaning it uses PCI Express 4.0, fast enough for modern GPUs and high-speed NVMe SSDs. It also includes 4 x16 slots . These PCIe slots are used to connect expansion cards — with the x16 slots typically reserved for graphics cards, while x8, x4, and x1 slots are used for devices like capture cards, sound cards, or network adapters.
For storage, this motherboard provides 3 M.2 slots (5.0, 4.0) and 4 SATA ports. M.2 slots are high-speed connectors for modern NVMe SSDs, which are much faster than older storage, while SATA ports are used for traditional hard drives and 2.5-inch SSDs. Together, they allow you to mix fast primary storage with larger, more affordable drives for bulk data.
Connectivity Overview
This motherboard has essential connectivity features with wired Realtek® RTL8111H GbE LAN chip (1 Gbps/100 Mbps/10 Mbps) Ethernet wireless networking with the Wi-Fi 6 standard, . USB connectivity covers basic needs. Please refer to the specification table for details.
For video output, this motherboard includes HDMI version 2.1 , DisplayPort version 1.4 . These video outputs are intended for integrated graphics and will only function if your CPU includes integrated GPU capabilities.
Audio Quality
The motherboard includes a standard audio chipset (Realtek ALC897) that covers basic needs for casual listening. While adequate for everyday use with mainstream headphones or desktop speakers, discerning users may want to add a USB DAC or sound card for improved fidelity, especially for music production or high-end headphones.
Overall Quality and Value
GIGABYTE B650 UD AX is basic and functional, carrying an overall quality score of 48.00. It is designed for budget-conscious builds or office setups where advanced features are not required, handling standard tasks effectively but lacking the polish or expandability of higher-tier models.
This motherboard has a solid 53.7% value efficiency, providing decent performance relative to its price. It represents a balanced option for users seeking fair capabilities without paying a premium.
General Information
| Manufacturer | GIGABYTE |
|---|---|
| Motherboard Name | GIGABYTE B650 UD AX |
| Current Price Amazon | $170 |
| Amazon Price Updated | 1 hour, 21 minutes ago. |
| Motherboard Available | True |
| Chipset / Socket | B650 / AM5 |
| Form Factor | Standard-ATX |
VRM Configuration
| CPU Power Phases (Amps) | 6 (60 A) |
|---|---|
| Power Design | 6+2+2 |
Memory Information
| Type / Slots | DDR5 / 4 slots |
|---|---|
| Max Capacity / Max OC | 256 GB / 8000 MHz |
PCIe Slot Configuration
| Supported Version | PCIe 4.0 | ||||
|---|---|---|---|---|---|
| Slot Size | Physical Slots | Gen4 | Gen3 |
|---|---|---|---|
| x16 | 4 | 1 | 0 |
Storage Configuration
| M.2 Slot Count | 3 slots |
|---|---|
| M.2 Supported Lengths | 25110, 22110, 2580, 2280 |
| M.2 PCIe Modes | 5.0, 4.0 |
| SATA Ports | 4 |
Onboard Audio Features
| Audio Chipset | Realtek ALC897 |
|---|---|
| Analog Audio Jacks | 3 jacks |
| Spatial/Surround Audio | ✔️ Rear Output Supports Spatial Audio |
Motherboard Display Outputs
| HDMI Output | HDMI - Version 2.1 (Max: 4096x2160@60 Hz) |
|---|---|
| DisplayPort Output | DisplayPort - Version 1.4 (Max: 3840x2160@144 Hz) |
USB and Thunderbolt Connectivity
Rear USB Ports
| USB 2.0 Type-A (480 Mbps) | 6 |
|---|---|
| USB 3.2 Gen 1 Type-C (5 Gbps) | 1 |
| USB 3.2 Gen 2 Type-A (10 Gbps) | 2 |
Front USB Ports
| USB 3.2 Gen 1 Type-C (5 Gbps) | 1 |
|---|
Internal USB Headers
| USB 2.0 Header (480 Mbps) | 6 |
|---|---|
| USB 3.2 Gen 1 Header (5 Gbps) | 2 |
Networking Information
| Ethernet | Chipset: Realtek® RTL8111H GbE LAN chip (1 Gbps/100 Mbps/10 Mbps) LAN Ports: 1 |
|---|---|
| Wi-Fi |
Version: Wi-Fi 6 Frequency Bands: 2.4GHz, 5GHz, 6GHz Antenna Connectors: 2 |
| Bluetooth | Supported: No |
Button Features
| Buttons |
Q-Flash Plus |
|---|
Quality & Features
Additional Information
| RAM | Supports non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 memory modules. Also supports AMD EXtended Profiles for Overclocking (AMD EXPO™). The CPU and memory configuration may affect the supported memory types, data rate (speed), and number of DRAM modules, please refer to the official "Memory Support List" for more information. |
|---|---|
| Display | HDMI supports HDCP 2.3 and native HDMI 2.1 TMDS compatible ports. Graphics specifications may vary depending on CPU support. |
| Expansion | The primary PCIEX16 slot's bandwidth depends on the installed CPU: Ryzen 7000/9000 Series support PCIe 4.0 x16, Ryzen 8000-Phoenix 1 support PCIe 4.0 x8, and Ryzen 8000-Phoenix 2 support PCIe 4.0 x4. The PCIEX1_1 and PCIEX1_2 slots become unavailable when an AMD Ryzen 8000 Series-Phoenix 2 processor is used. The PCIEX16 slot can only support a graphics card or an NVMe SSD. |
| Storage |
M.2 Slot Details:
RAID 0, 1, and 10 are supported for both NVMe and SATA storage devices. The performance and supported PCIe version of the M2A_CPU and M2P_CPU slots are dependent on the installed CPU model. |
| Audio | Supports 2/4/5.1/7.1-channel audio. You can change the functionality of an audio jack using the audio software. To configure 7.1-channel audio, access the audio software for audio settings. |
| Networking | Realtek RTL8851 WIFI 6 module. Supports WIFI a, b, g, n, ac, ax. 2T2R antenna configuration. |
| Buttons | The text mentions a Clear CMOS jumper, but not a button. |
| Dimensions | 30.5 cm x 24.4 cm |
Note: The specifications and descriptions above are extracted by AI to present the official manufacturer data in a clearer and more natural way for easier understanding. However, this AI-processed information may contain inaccuracies. Please verify all details by consulting the official manufacturer's information provided below.
GIGABYTE B650 UD AX Compared to Motherboards with Similar Performance and Features
Motherboard Quality & Features per Price Table
| Motherboard (Desc) | Price (Desc) | Overall_Q (Desc) | VRM_Q (Desc) | Chipset (Desc) | Exp_Str (Desc) | Connect (Desc) | Audio (Desc) | Q&F/Price (Desc) |
|---|---|---|---|---|---|---|---|---|
|
$140
|
0.0%
|
49.2%
|
24.0%
|
74.0%
|
65.0%
|
43.0%
|
40.0%
|
66.8%
|
|
|
$160
|
0.0%
|
49.0%
|
14.0%
|
74.0%
|
72.0%
|
45.0%
|
40.0%
|
58.2%
|
|
|
$120❗
|
0.0%
|
48.8%
|
18.0%
|
74.0%
|
72.0%
|
40.0%
|
40.0%
|
77.3%
|
|
|
$170
|
↑
17.7%
|
48.0%
|
18.0%
|
74.0%
|
63.0%
|
45.0%
|
40.0%
|
53.7%
|
|
|
$120
|
0.0%
|
48.0%
|
15.0%
|
73.0%
|
52.0%
|
60.0%
|
40.0%
|
76.0%
|
|
|
$120
|
↓
-7.6%
|
47.8%
|
20.0%
|
76.0%
|
46.0%
|
57.0%
|
40.0%
|
75.7%
|
|
|
$100❗
|
0.0%
|
47.6%
|
20.0%
|
73.0%
|
63.0%
|
42.0%
|
40.0%
|
90.4%
|
|
|
$115
|
0.0%
|
46.8%
|
14.0%
|
74.0%
|
51.0%
|
50.0%
|
45.0%
|
77.3%
|
|
|
$160❗
|
0.0%
|
46.6%
|
18.0%
|
78.0%
|
63.0%
|
34.0%
|
40.0%
|
55.3%
|
Motherboard Comparison and Detail Specifications Table
| Specification | Perf Chart | ||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Price |
$140
|
0.0%
|
$160
|
0.0%
|
$120❗
|
0.0%
|
$170
|
↑
17.7%
|
$120
|
0.0%
|
$120
|
↓
-7.6%
|
$100❗
|
0.0%
|
$115
|
0.0%
|
$160❗
|
0.0%
|
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| Manufacturer | GIGABYTE | GIGABYTE | GIGABYTE | GIGABYTE | ASRock | MSI | ASRock | GIGABYTE | ASRock | ||||||||||||||||||||||||||||||||||||||||
| Chip/Socket | B650M / AM5 | B650M / AM5 | B650 / AM5 | B650 / AM5 | B650M / AM5 | B650M / AM5 | B650M / AM5 | B650M / AM5 | B850M / AM5 | ||||||||||||||||||||||||||||||||||||||||
| Form | Micro-ATX | Micro-ATX | Standard-ATX | Standard-ATX | Micro-ATX | Micro-ATX | Micro-ATX | Micro-ATX | Micro-ATX | ||||||||||||||||||||||||||||||||||||||||
| CPU Phases | 8 (60 A) | 5 (60 A) | 6 (60 A) | 6 (60 A) | 6 (50 A) | 7 (55 A) | 8 (50 A) | 5 (60 A) | 6 (60 A) | ||||||||||||||||||||||||||||||||||||||||
| PWR Design | 8+2+2 | 5+2+2 | 6+2+2 | 6+2+2 | 6+2+1 | 7+2+1 | 8+2+1 | 5+2+2 | 6+1+1 | ||||||||||||||||||||||||||||||||||||||||
| Mem Slots | 4 / DDR5 | 4 / DDR5 | 4 / DDR5 | 4 / DDR5 | 4 / DDR5 | 4 / DDR5 | 2 / DDR5 | 4 / DDR5 | 2 / DDR5 | ||||||||||||||||||||||||||||||||||||||||
| Max Mem | 256 GB / 8200 MHz | 256 GB / 8000 MHz | 256 GB / 8000 MHz | 256 GB / 8000 MHz | 256 GB / 7200 MHz | 256 GB / 7200 MHz | 128 GB / 7200 MHz | 256 GB / 8000 MHz | 128 GB / 8200 MHz | ||||||||||||||||||||||||||||||||||||||||
| PCIe | PCIe 5.0 | PCIe 4.0 | PCIe 4.0 | PCIe 4.0 | PCIe 4.0 | PCIe 4.0 | PCIe 4.0 | PCIe 4.0 | PCIe 4.0 | ||||||||||||||||||||||||||||||||||||||||
| PCIe Slots | 1x16 Gen5 | 1x16 Gen3 | 1x16 Gen4 | 3x16 Gen3 | 1x16 Gen4 | 3x16 Gen3 | 1x16 Gen4 | 1x16 Gen4 | 1x16 Gen3 | 1x16 Gen4 | 2x1 Gen3 | 2x16 Gen4 | 1x1 Gen4 | 1x16 Gen4 | 1x1 Gen3 | 2x16 Gen4 | 1x1 Gen4 | ||||||||||||||||||||||||||||||||||||||||
| M.2 | 2 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | ||||||||||||||||||||||||||||||||||||||||
| SATA | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | ||||||||||||||||||||||||||||||||||||||||
| Audio | Realtek® Audio CODEC | Realtek ALC897 | Realtek® Audio CODEC | Realtek ALC897 | Realtek ALC897 Audio Codec | Realtek® ALC897 Codec | Realtek ALC897 Audio Codec | Realtek® ALC892/ALC897 | Realtek ALC897 Audio Codec | ||||||||||||||||||||||||||||||||||||||||
| S/PDIF | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ||||||||||||||||||||||||||||||||||||||||
| HDMI | ✔️ (2.1) | ✔️ (2.1) | ✔️ (2.1) | ✔️ (2.1) | ✔️ (2.1) | ✔️ (2.1) | ✔️ (2.1) | ✔️ (2.1) | ✔️ (2.1) | ||||||||||||||||||||||||||||||||||||||||
| DP | ✔️ (1.4) | ✔️ (1.4) | ✔️ (1.4) | ✔️ (1.4) | ✔️ (1.4) | ✔️ (1.4) | ✔️ (1.4) | ✔️ (1.4) | ✔️ (1.4) | ||||||||||||||||||||||||||||||||||||||||
| LAN | Realtek® 2.5GbE LAN chip… (1 ports) | Realtek® RTL8111H GbE LA… (1 ports) | Realtek® GbE LAN chip (1… (1 ports) | Realtek® RTL8111H GbE LA… (1 ports) | 2.5 Gigabit LAN 10/100/1… (1 ports) | Realtek® 8125BG 2.5G (1 ports) | 2.5 Gigabit LAN 10/100/… (1 ports) | Realtek® 2.5GbE LAN chip… (1 ports) | 2.5 Gigabit LAN 10/100/1… (1 ports) | ||||||||||||||||||||||||||||||||||||||||
| Wi-Fi | ❌ | Wi-Fi 6 (802.11ax) | Wi-Fi 802.11ac | Wi-Fi 6 | Wi-Fi Wi-Fi 6E | ❌ | ❌ | Wi-Fi Wi-Fi 6E | ❌ | ||||||||||||||||||||||||||||||||||||||||
| BT | ❌ | ❌ | v5.0 | ❌ | v5.2 | ❌ | ❌ | v5.3 | ❌ | Rear USB |
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VRM Appropriate CPU Specification Table
| CPU | Price | App_Performance | Game_Performance | TDP/Max | C/SC/T | L2/L3 Cache | Base/Boost | Code Name | GPU |
|---|---|---|---|---|---|---|---|---|---|
| No compatible CPU available. The motherboard's VRM is too weak to be recommended with any CPU in the database. | |||||||||
Official Manufacturer Data
Memory:
4 x DDR5 DIMM sockets supporting up to 256 GB (64 GB single DIMM capacity) of system memory
Dual channel memory architecture
Support for non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 memory modules
Support for AMD EXtended Profiles for Overclocking (AMD EXPO™) and Extreme Memory Profile (XMP) memory modules
(The CPU and memory configuration may affect the supported memory types, data rate (speed), and number of DRAM modules, please refer to "Memory Support List" on GIGABYTE's website for more information.)
Graphics:
- 1 x DisplayPort, supporting a maximum resolution of 3840x2160@144 Hz
* Support for DisplayPort 1.4 version.
- 1 x HDMI port, supporting a maximum resolution of 4096x2160@60 Hz
* Support for HDMI 2.1 version and HDCP 2.3.
** Support for native HDMI 2.1 TMDS compatible ports.
(Graphics specifications may vary depending on CPU support.)
Storage:
- AMD Ryzen™ 7000 Series Processors/ Ryzen™ 9000 Series Processors support PCIe 5.0 x4/x2 SSDs
- AMD Ryzen™ 8000 Series-Phoenix 1 Processors support PCIe 4.0 x4/x2 SSDs
- AMD Ryzen™ 8000 Series-Phoenix 2 Processors support PCIe 4.0 x4/x2 SSDs
1 x M.2 connector (M2P_CPU), integrated in the CPU, supporting Socket 3, M key, type 22110/2280 SSDs:
- AMD Ryzen™ 7000 Series Processors/ Ryzen™ 9000 Series Processors support PCIe 4.0 x2 SSDs
- AMD Ryzen™ 8000 Series-Phoenix 1 Processors support PCIe 4.0 x2 SSDs
- AMD Ryzen™ 8000 Series-Phoenix 2 Processors support PCIe 4.0 x2 SSDs
1 x M.2 connector (M2C_SB), integrated in the Chipset, supporting Socket 3, M key, type 22110/2280 PCIe 4.0 x4/x2 SSD support)
4 x SATA 6Gb/s connectors
RAID 0, RAID 1, and RAID 10 support for NVMe SSD storage devices
RAID 0, RAID 1, and RAID 10 support for SATA storage devices
Expansion Slots:
- AMD Ryzen™ 7000 Series Processors/ Ryzen™ 9000 Series Processors support PCIe 4.0 x16 mode
- AMD Ryzen™ 8000 Series-Phoenix 1 Processors support PCIe 4.0 x8 mode
- AMD Ryzen™ 8000 Series-Phoenix 2 Processors support PCIe 4.0 x4 mode
* The PCIEX16 slot can only support a graphics card or an NVMe SSD. If only one graphics card is to be installed, be sure to install it in the PCIEX16 slot.
2 x PCI Express x16 slots (PCIEX1_1/PCIEX1_2), integrated in the CPU, supporting PCIe 3.0 and running at x1
* The PCIEX1_1 and PCIEX1_2 slots become unavailable when an AMD Ryzen™ 8000 Series-Phoenix 2 processor is used.
1 x PCI Express x16 slot (PCIEX1_3), integrated in the Chipset, supporting PCIe 3.0 and running at x1
USB:
- 2 x USB 3.2 Gen 2 Type-A ports (red) on the back panel
- 1 x USB Type-C® port on the back panel, with USB 3.2 Gen 1 support
CPU+USB 2.0 Hub:
- 4 x USB 2.0/1.1 ports on the back panel
Chipset:
- 2 x USB 3.2 Gen 1 ports available through the internal USB header
- 1 x USB Type-C® port with USB 3.2 Gen 1 support, available through the internal USB header
- 4 x USB 2.0/1.1 ports (2 ports on the back panel, 2 ports available through the internal USB header)
Chipset+USB 2.0 Hub:
- 4 x USB 2.0/1.1 ports available through the internal USB headers
Internal I/O:
1 x 8-pin ATX 12V power connector
1 x CPU fan header
1 x CPU fan/water cooling pump header
2 x system fan headers
1 x system fan/water cooling pump header
3 x addressable RGB Gen2 LED strip headers
1 x RGB LED strip header
3 x M.2 Socket 3 connectors
4 x SATA 6Gb/s connectors
1 x front panel header
1 x front panel audio header
1 x USB Type-C® header, with USB 3.2 Gen 1 support
1 x USB 3.2 Gen 1 header
3 x USB 2.0/1.1 headers
1 x Trusted Platform Module header (For the GC-TPM2.0 SPI/GC-TPM2.0 SPI 2.0/GC-TPM2.0 SPI V2 module only)
1 x Q-Flash Plus button
1 x serial port header
1 x Clear CMOS jumper
Back Panel I/O:
1 x HDMI port
1 x PS/2 keyboard/mouse port
2 x SMA antenna connectors (2T2R)
1 x USB Type-C® port, with USB 3.2 Gen 1 support
2 x USB 3.2 Gen 2 Type-A ports (red)
6 x USB 2.0/1.1 ports
1 x RJ-45 port
3 x audio jacks
WiFi:
- WIFI a, b, g, n, ac, ax, supporting 2.4/5/6 GHz carrier frequency bands
- Support for 11ax wireless standard
(Actual data rate may vary depending on environment and equipment.)
Audio:
ALC897
High Definition Audio
2/4/5.1/7.1-channel
* You can change the functionality of an audio jack using the audio software. To configure 7.1-channel audio, access the audio software for audio settings.
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