ASROCK B450M PRO4 R2.0
ASROCK B450M PRO4 R2.0 Specifications Review
ASROCK B450M PRO4 R2.0 by ASRock is a Micro-ATX form factor motherboard based on the mid-range B450M chipset and AM4 socket, providing a balanced set of features and connectivity. It is designed to support DDR4 memory, with 4 slots, a maximum capacity of 128 GB, and an overclocking speed of up to 3200 MHz.
VRM Quality
The ASROCK B450M PRO4 R2.0 has a basic VRM configuration, delivering 42 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 ASROCK B450M PRO4 R2.0 offers a simplified expansion and storage configuration with PCIe 3.0 support, meaning it uses PCI Express 3.0, still capable for most current GPUs and expansion cards, but with less bandwidth than newer standards. It also includes 2 x16 slots , and 1 x1 slot. 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 2 M.2 slots 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 PCIE x1 Gigabit LAN 10/100/1000 Mb/s Ethernet . USB connectivity covers basic needs. Please refer to the specification table for details.
For video output, this motherboard includes HDMI 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 ALC892/897 Audio Codec) 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
ASROCK B450M PRO4 R2.0 is basic and functional, carrying an overall quality score of 38.00. 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 offers an impressive 90.7% performance-to-price ratio, delivering excellent value by combining strong performance with reasonable cost, making it a smart choice for budget-conscious buyers who don’t want to sacrifice quality.
General Information
| Manufacturer | ASRock |
|---|---|
| Motherboard Name | ASROCK B450M PRO4 R2.0 |
| Current Price Amazon | $80❗N/A |
| Amazon Price Updated | 1 month, 2 weeks ago. |
| Motherboard Available | False |
| Chipset / Socket | B450M / AM4 |
| Form Factor | Micro-ATX |
VRM Configuration
| CPU Power Phases (Amps) | 6 (42 A) |
|---|---|
| Power Design | 6+2 |
Memory Information
| Type / Slots | DDR4 / 4 slots |
|---|---|
| Max Capacity / Max OC | 128 GB / 3200 MHz |
PCIe Slot Configuration
| Supported Version | PCIe 3.0 | ||||
|---|---|---|---|---|---|
| Slot Size | Physical Slots | Gen3 |
|---|---|---|
| x16 | 2 | 1 |
| x1 | 1 | 0 |
Storage Configuration
| M.2 Slot Count | 2 slots |
|---|---|
| M.2 Supported Lengths | 2230, 2242, 2260, 2280 |
| SATA Ports | 4 |
Onboard Audio Features
| Audio Chipset | Realtek ALC892/897 Audio Codec |
|---|---|
| Analog Audio Jacks | 3 jacks |
Motherboard Display Outputs
| HDMI Output | HDMI - Version 1.4 (Max: 4096x2160 @ 24Hz) |
|---|
USB and Thunderbolt Connectivity
Rear USB Ports
| USB 2.0 Type-A (480 Mbps) | 2 |
|---|---|
| USB 3.2 Gen 1 Type-A (5 Gbps) | 4 |
| USB 3.2 Gen 2 Type-A (10 Gbps) | 1 |
| USB 3.2 Gen 2 Type-C (10 Gbps) | 1 |
Internal USB Headers
| USB 2.0 Header (480 Mbps) | 4 |
|---|---|
| USB 3.2 Gen 1 Header (5 Gbps) | 2 |
Networking Information
| Ethernet | Chipset: PCIE x1 Gigabit LAN 10/100/1000 Mb/s LAN Ports: 1 |
|---|---|
| Wi-Fi |
Module: Not Included |
| Bluetooth | Supported: No |
Quality & Features
Additional Information
| RAM | Supports DDR4 un-buffered memory with speeds of 3200 / 2933 / 2667 / 2400 / 2133. Overclocking is supported on certain CPUs (Pinnacle Ridge, Summit Ridge, Raven Ridge). ECC support is dependent on the CPU model; for example, it is supported with Vermeer CPUs but not with Picasso or Raven Ridge CPUs. The DIMM slots feature 15μ Gold Contact. |
|---|---|
| Display | Features Integrated AMD Radeon™ Vega Series Graphics in Ryzen Series APU, with actual support varying by CPU. Supports DirectX 12 and Pixel Shader 5.0. Shared memory is 2GB by default, with a maximum of 16GB (requires 32GB system memory). Provides three graphics output options: D-Sub (max 1920x1200 @ 60Hz), DVI-D (max 1920x1200 @ 60Hz), and HDMI. Supports Triple Monitor setups. The HDMI 1.4 port supports Auto Lip Sync, Deep Color (12bpc), xvYCC, HBR, and 4K Ultra HD (UHD) playback. HDCP 1.4 is supported on both DVI-D and HDMI 1.4 ports. |
| Expansion | The primary PCIe 3.0 x16 slot (PCIE2) speed is dependent on the installed CPU: x16 mode with Vermeer/Matisse/Cezanne/Renoir/Summit Ridge/Pinnacle Ridge CPUs, x8 mode with Picasso/Raven Ridge CPUs, and x4 mode with Athlon series CPUs. There is a second physical x16 slot (PCIE3) that operates at PCIe 2.0 x4 mode. An additional PCIe 2.0 x1 slot is also present. Supports NVMe SSD as boot disks and AMD Quad CrossFireX. |
| Storage |
M.2 Slot Details:
SATA connectors support NCQ, AHCI and Hot Plug. Supports NVMe SSD as boot disks. Supports ASRock U.2 Kit. |
| Audio | 7.1 CH HD Audio with Content Protection. Supports Surge Protection. |
| Networking | PCIE x1 Gigabit LAN. The RJ-45 port has an LED indicator (ACT/LINK LED and SPEED LED). |
| Dimensions | 24.4 cm x 24 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.
ASROCK B450M PRO4 R2.0 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) |
|---|---|---|---|---|---|---|---|---|
|
$80
|
0.0%
|
42.4%
|
13.0%
|
81.0%
|
46.0%
|
27.0%
|
45.0%
|
100.7%
|
|
|
$70
|
0.0%
|
42.2%
|
12.0%
|
75.0%
|
48.0%
|
31.0%
|
45.0%
|
114.6%
|
|
|
$97
|
↑
1.9%
|
40.4%
|
13.0%
|
67.0%
|
49.0%
|
33.0%
|
40.0%
|
79.3%
|
|
|
$80❗
|
↓
-1.4%
|
38.0%
|
13.0%
|
58.0%
|
37.0%
|
37.0%
|
45.0%
|
90.7%
|
|
|
$188❗
|
0.0%
|
37.8%
|
14.0%
|
77.0%
|
45.0%
|
13.0%
|
40.0%
|
38.2%
|
|
|
$100
|
0.0%
|
36.2%
|
18.0%
|
49.0%
|
35.0%
|
39.0%
|
40.0%
|
68.8%
|
|
|
$72
|
0.0%
|
33.8%
|
12.0%
|
58.0%
|
30.0%
|
29.0%
|
40.0%
|
89.2%
|
|
|
$146
|
↑
38.8%
|
33.0%
|
24.0%
|
41.0%
|
29.0%
|
31.0%
|
40.0%
|
43.0%
|
|
|
$127
|
↑
0.1%
|
32.4%
|
15.0%
|
47.0%
|
29.0%
|
31.0%
|
40.0%
|
48.6%
|
Motherboard Comparison and Detail Specifications Table
| Specification | Perf Chart | ||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Price |
$80
|
0.0%
|
$70
|
0.0%
|
$97
|
↑
1.9%
|
$80❗
|
↓
-1.4%
|
$188❗
|
0.0%
|
$100
|
0.0%
|
$72
|
0.0%
|
$146
|
↑
38.8%
|
$127
|
↑
0.1%
|
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| Manufacturer | MSI | GIGABYTE | ASUS | ASRock | MSI | ASUS | Asrock | ASRock | GIGABYTE | ||||||||||||||||||||||||||||||||||||
| Chip/Socket | B550M / AM4 | B550M / AM4 | B450M / AM4 | B450M / AM4 | B550 / AM4 | A520M / AM4 | B450M / AM4 | A520M / AM4 | A520I / AM4 | ||||||||||||||||||||||||||||||||||||
| Form | Micro-ATX | Micro-ATX | Micro-ATX | Micro-ATX | Standard-ATX | Micro-ATX | Micro-ATX | Mini-ITX | Mini-ITX | ||||||||||||||||||||||||||||||||||||
| CPU Phases | 5 (50 A) | 5 (50 A) | 5 (50 A) | 6 (42 A) | 5 (55 A) | 6 (60 A) | 5 (50 A) | 8 (60 A) | 6 (50 A) | ||||||||||||||||||||||||||||||||||||
| PWR Design | 5+1 | 5+1 | 5+1 | 6+2 | 5+1 | 6+1 | 5+1 | 8+1 | 6+1 | ||||||||||||||||||||||||||||||||||||
| Mem Slots | 4 / DDR4 | 4 / DDR4 | 4 / DDR4 | 4 / DDR4 | 4 / DDR4 | 4 / DDR4 | 2 / DDR4 | 2 / DDR4 | 2 / DDR4 | ||||||||||||||||||||||||||||||||||||
| Max Mem | 128 GB / 4400 MHz | 128 GB / 4733 MHz | 128 GB / 4400 MHz | 128 GB / 3200 MHz | 128 GB / 4400 MHz | 128 GB / 4866 MHz | 64 GB / 3200 MHz | 64 GB / 4733 MHz | 64 GB / 5300 MHz | ||||||||||||||||||||||||||||||||||||
| PCIe | PCIe 4.0 | PCIe 4.0 | PCIe 3.0 | PCIe 3.0 | PCIe 3.0 | PCIe 3.0 | PCIe 3.0 | PCIe 3.0 | PCIe 3.0 | ||||||||||||||||||||||||||||||||||||
| PCIe Slots | 1x16 Gen4 | 2x1 Gen3 | 1x16 Gen4 | 1x1 Gen3 | 3x16 Gen3 | 2x1 | 1x16 Gen3 | 1x1 | 2x16 Gen3 | 4x1 | 1x16 Gen3 | 2x1 Gen3 | 1x16 Gen3 | 1x1 | 1x16 Gen3 | 1x16 Gen3 | ||||||||||||||||||||||||||||||||||||
| M.2 | 2 | 2 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | ||||||||||||||||||||||||||||||||||||
| SATA | 4 | 4 | 6 | 4 | 6 | 4 | 4 | 4 | 4 | ||||||||||||||||||||||||||||||||||||
| Audio | Realtek® ALC892/ALC897 Codec | Realtek® ALC892/ALC897 | Realtek ALC887/897 | Realtek ALC892/897 Audio Codec | Realtek® ALC897 Codec | Realtek ALC887/897 | Realtek ALC887/897 | Realtek ALC887/897 Audio Codec | Realtek® Audio CODEC | ||||||||||||||||||||||||||||||||||||
| S/PDIF | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ||||||||||||||||||||||||||||||||||||
| HDMI | ✔️ (2.1) | ✔️ (2.1) | ✔️ (None) | ✔️ (1.4) | ✔️ (2.0b) | ✔️ (2.1) | ✔️ (None) | ✔️ (2.1) | ✔️ (2.1) | ||||||||||||||||||||||||||||||||||||
| DP | ✔️ (None) | ✔️ (1.4) | ❌ | ❌ | ❌ | ✔️ (1.2) | ❌ | ✔️ (1.4) | ✔️ (1.4) | ||||||||||||||||||||||||||||||||||||
| LAN | Realtek® 8111HN Gigabit (1 ports) | Realtek® GbE LAN chip (1… (1 ports) | Realtek® RTL8111H (1 ports) | PCIE x1 Gigabit LAN 10/1… (1 ports) | 1x Realtek® RTL8111H LAN… (1 ports) | 1 x Realtek 1Gb Ethernet… (1 ports) | PCIE x1 Gigabit LAN 10/1… (1 ports) | PCIE x1 Gigabit LAN 10/1… (1 ports) | Realtek® GbE LAN chip (1 ports) | ||||||||||||||||||||||||||||||||||||
| Wi-Fi | ❌ | ❌ | ❌ | ❌ | ❌ | Wi-Fi Wi-Fi 5 | ❌ | Wi-Fi 802.11ac | Wi-Fi 802.11ac | ||||||||||||||||||||||||||||||||||||
| BT | ❌ | ❌ | ❌ | ❌ | ❌ | v5.0 | ❌ | v4.2 | v4.2 | Rear USB |
|
|
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|
❌ |
|
|
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|
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| USB Headers |
|
|
|
|
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|
|
|
|
||||||||||||||||||||||||||||||||||||
| Front USB |
|
❌ |
|
❌ |
❌ |
❌ |
❌ |
❌ |
❌ |
%20Gallery/5f36163c6bd245b68145502b06ea9c7a.jpg)
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 DDR4 DIMM Slots
- AMD Ryzen series CPUs (Vermeer) support DDR4 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory*
- AMD Ryzen series CPUs (Matisse) support DDR4 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory*
- AMD Ryzen series APUs (Cezanne) support DDR4 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory*
- AMD Ryzen series APUs (Renoir) support DDR4 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory*
- AMD Ryzen series CPUs (Pinnacle Ridge) support DDR4 3200+(OC) / 2933(OC) / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory*
- AMD Ryzen series CPUs (Picasso) support DDR4 2933 / 2667 / 2400 / 2133 non-ECC, un-buffered memory*
- AMD Ryzen series CPUs (Summit Ridge) support DDR4 3200+(OC) / 2933(OC) / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory*
- AMD Ryzen series CPUs (Raven Ridge) support DDR4 3200+(OC) / 2933 / 2667 / 2400 / 2133 non-ECC, un-buffered memory
- Max. capacity of system memory: 128GB**
- Supports Extreme Memory Profile (XMP) memory modules
- 15μ Gold Contact in DIMM Slots
Graphics:
- DirectX 12, Pixel Shader 5.0
- Shared memory default 2GB. Max Shared memory supports up to 16GB.**
- Three graphics output options: D-Sub, DVI-D and HDMI
- Supports Triple Monitor
- Supports HDMI 1.4 with max. resolution up to 4K x 2K (4096x2160) @ 24Hz / (3840x2160) @ 30Hz
- Supports DVI-D with max. resolution up to 1920x1200 @ 60Hz
- Supports D-Sub with max. resolution up to 1920x1200 @ 60Hz
- Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI 1.4 Port (Compliant HDMI monitor is required)
- Supports HDCP 1.4 with DVI-D and HDMI 1.4 Ports
- Supports 4K Ultra HD (UHD) playback with HDMI 1.4 Port
*Actual support may vary by CPU
**The Max shared memory 16GB requires 32GB system memory installed.
Storage:
- 1 x Ultra M.2 Socket (M2_1), supports M Key type 2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32 Gb/s) (with Vermeer, Matisse, Cezanne, Renoir, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16 Gb/s) (with Athlon series APU)**
- 1 x M.2 Socket (M2_2), supports M Key type 2230/2242/2260/2280 M.2 SATA3 6.0 Gb/s module
*M2_2 and SATA3_3 share lanes. If either one of them is in use, the other one will be disabled.
**Supports NVMe SSD as boot disks
Supports ASRock U.2 Kit
Expansion Slots:
- 1 x PCI Express 3.0 x16 Slot (PCIE2: x16 mode)*
- 1 x PCI Express 2.0 x16 Slot (PCIE3: x4 mode)
AMD Ryzen series CPUs (Picasso, Raven Ridge)
- 1 x PCI Express 3.0 x16 Slot (PCIE2: x8 mode)*
- 1 x PCI Express 2.0 x16 Slot (PCIE3: x4 mode)
AMD Athlon series CPUs
- 1 x PCI Express 3.0 x16 Slot (PCIE2: x4 mode)*
- 1 x PCI Express 2.0 x16 Slot (PCIE3: x4 mode)
- 1 x PCI Express 2.0 x1 Slot
- Supports AMD Quad CrossFireX™ and CrossFireX™
*Supports NVMe SSD as boot disks
USB:
Internal I/O:
- 1 x TPM Header
- 1 x Chassis Intrusion Header
- 1 x Power LED and Speaker Header
- 1 x RGB LED Header*
- 1 x Addressable LED Header**
- 1 x AMD Fan LED Header***
- 1 x CPU Fan Connector (4-pin)****
- 1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)*****
- 3 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan Speed Control)******
- 1 x 24 pin ATX Power Connector
- 1 x 8 pin 12V Power Connector
- 1 x Front Panel Audio Connector
- 2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection)
- 1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection)
*Supports in total up to 12V/3A, 36W LED Strip
**Supports in total up to 5V/3A, 15W LED Strip
***The AMD Fan LED Header supports LED strips of maximum load of 3A (36W) and length up to 2.5M.
****The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power.
*****The CPU/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power.
******The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power.
CPU_FAN2/WP, CHA_FAN1/WP, CHA_FAN2/WP and CHA_FAN3/WP can auto detect if 3-pin or 4-pin fan is in use.
Back Panel I/O:
- 1 x D-Sub Port
- 1 x DVI-D Port
- 1 x HDMI Port
- 2 x USB 2.0 Ports (Supports ESD Protection)
- 1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) (Supports ESD Protection)
- 1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (Supports ESD Protection)
- 4 x USB 3.2 Gen1 Ports (Supports ESD Protection)
- 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
- HD Audio Jacks: Line in / Front Speaker / Microphone
Audio:
- Supports Surge ProtectionA8:XFD8
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