ASRock > Motherboard Compare Result

Model	B450M Steel Legend	B450M Pro4

Form Factor	- Micro ATX Form Factor: 9.6-in x 9.6-in, 24.4 cm x 24.4 cm	- Micro ATX Form Factor: 9.6-in x 9.6-in, 24.4 cm x 24.4 cm - Solid Capacitor design
Unique Feature	ASRock USB 3.2 Gen2 - ASRock USB 3.2 Gen2 Type-A Port (10 Gb / s) - ASRock USB 3.2 Gen2 Type-C Port (10 Gb / s) ASRock Super Alloy - XXL Aluminum Alloy Heatsink - Premium 60A Power Choke - Nichicon 12K Black Caps (100% Japan made high quality conductive polymer capacitors) - I / O Armor - Sapphire Black PCB - High Density Glass Fabric PCB - 2oz Copper PCB ASRock Steel Slot ASRock Ultra M.2 (PCIe Gen3 x4) ASRock Full Spike Protection (for all USB, Audio, LAN Ports) ASRock Live Update & APP Shop	ASRock USB 3.2 Gen2 - ASRock USB 3.2 Gen2 Type-A Port (10 Gb / s) - ASRock USB 3.2 Gen2 Type-C Port (10 Gb / s) ASRock Super Alloy - Premium 42A Power Choke - Sapphire Black PCB - High Density Glass Fabric PCB - 2oz Copper PCB ASRock Ultra M.2 (PCIe Gen3 x4) ASRock Full Spike Protection (for all USB, Audio, LAN Ports) ASRock Live Update & APP Shop
CPU	- Supports AMD AM4 Socket Ryzen™ 2000, 3000, 4000 G-Series, 5000 and 5000 G-Series Desktop Processors - Digi Power design - 6 Power Phase design	- Supports AMD AM4 Socket Ryzen™ 2000, 3000, 4000 G-Series, 5000 and 5000 G-Series Desktop Processors - Digi Power design - 9 Power Phase design
Chipset	- AMD Promontory B450	- AMD Promontory B450
Memory	- Dual Channel DDR4 Memory Technology - 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 3533+(OC) / 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 3466+(OC) / 3200(OC) / 2933(OC) / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory* - AMD Ryzen series CPUs (Raven Ridge) support DDR4 3466+(OC) / 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 For Ryzen Series APUs (Picasso, Cezanne, Renoir and Raven Ridge), ECC is only supported with PRO CPUs. Please refer to below table for AMD non-XMP memory frequency support. Ryzen Series CPUs (Vermeer): Ryzen Series CPUs (Matisse): Ryzen Series APUs (Cezanne): Ryzen Series APUs (Renoir): Ryzen Series CPUs (Pinnacle Ridge): Ryzen Series CPUs (Picasso): Ryzen Series CPUs (Summit Ridge): Ryzen Series CPUs (Raven Ridge): SR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module label DR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module label *Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows 32-bit OS. For Windows 64-bit OS with 64-bit CPU, there is no such limitation.	- Dual Channel DDR4 Memory Technology - 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 For Ryzen Series APUs (Picasso, Cezanne, Renoir and Raven Ridge), ECC is only supported with PRO CPUs. Please refer to below table for AMD non-XMP memory frequency support. Ryzen Series CPUs (Vermeer): Ryzen Series CPUs (Matisse): Ryzen Series APUs (Cezanne): Ryzen Series APUs (Renoir): Ryzen Series CPUs (Pinnacle Ridge): Ryzen Series CPUs (Picasso): Ryzen Series CPUs (Summit Ridge): Ryzen Series CPUs (Raven Ridge): SR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module label DR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module label *Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows 32-bit OS. For Windows 64-bit OS with 64-bit CPU, there is no such limitation.
Slots	AMD Ryzen series CPUs (Vermeer, Matisse, Cezanne, Renoir, Summit Ridge and Pinnacle Ridge) - 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) (If you use Athlon 2xxGE series APU, PCIE2 slot will run at x4 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	AMD Ryzen series CPUs (Vermeer, Matisse, Cezanne, Renoir, Summit Ridge and Pinnacle Ridge) - 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
Graphics	- Integrated AMD Radeon™ Vega Series Graphics in Ryzen Series APU* - DirectX 12, Pixel Shader 5.0 - Shared memory default 2GB. Max Shared memory supports up to 16GB.** - Dual graphics output: Support HDMI and DisplayPort 1.2 ports by independent display controllers - Supports HDMI 1.4 with max. resolution up to 4K x 2K (4096x2160) @ 24Hz / (3840x2160) @ 30Hz - Supports DisplayPort 1.2 with max. resolution up to 4K x 2K (4096x2160) @ 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 HDMI 1.4 and DisplayPort 1.2 Ports - Supports 4K Ultra HD (UHD) playback with HDMI 1.4 and DisplayPort 1.2 Ports Actual support may vary by CPU *The Max shared memory 16GB requires 32GB system memory installed.	- Integrated AMD Radeon™ Vega Series Graphics in Ryzen Series APU* - 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 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 Port (Compliant HDMI monitor is required) - Supports HDCP 1.4 with DVI-D and HDMI Ports - Supports 4K Ultra HD (UHD) playback with HDMI Port Actual support may vary by CPU *The Max shared memory 16GB requires 32GB system memory installed.
Audio	- 7.1 CH HD Audio with Content Protection (Realtek ALC892 / 897 Audio Codec) - Supports Surge Protection - PCB Isolate Shielding - Individual PCB Layers for R / L Audio Channel - Gold Audio Jacks	- 7.1 CH HD Audio with Content Protection (Realtek ALC892 Audio Codec) - Premium Blu-ray Audio support - Supports Surge Protection - ELNA Audio Caps
Lan	- PCIE x1 Gigabit LAN 10 / 100 / 1000 Mb / s - Realtek RTL8111H - Supports Wake-On-LAN - Supports Lightning / ESD Protection - Supports Energy Efficient Ethernet 802.3az - Supports PXE	- PCIE x1 Gigabit LAN 10 / 100 / 1000 Mb / s - Realtek RTL8111H - Supports Wake-On-LAN - Supports Lightning / ESD Protection - Supports Energy Efficient Ethernet 802.3az - Supports PXE
WiFi	- n/a	- n/a
USB
Rear Panel I/O	- 1 x PS / 2 Mouse / Keyboard Port - 1 x HDMI Port - 1 x DisplayPort 1.2 - 1 x Optical SPDIF Out 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: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks)	- 1 x PS / 2 Mouse / Keyboard Port - 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 3.1 Gen2 Type-A Port (10 Gb / s) (Supports ESD Protection) - 1 x USB 3.1 Gen2 Type-C Port (10 Gb / s) (Supports ESD Protection) - 4 x USB 3.1 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
Storage	- 4 x SATA3 6.0 Gb / s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot Plug* - 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 and Raven Ridge 2)** - 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	- 4 x SATA3 6.0 Gb / s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot Plug* - 1 x Ultra M.2 Socket (M2_1, Key M), supports type 2242 / 2260 / 2280 PCIe Gen3x4 (32 Gb / s) (with Vermeer, Matisse, Cezanne, Renoir, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3x2 (16 Gb / s) (with Athlon series APU) mode** - 1 x M.2 Socket (M2_2, Key M), supports type 2230 / 2242 / 2260 / 2280 SATA3 6.0 Gb / s mode 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
RAID
Connector	- 1 x COM Port Header - 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.	- 1 x COM Port Header - 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 3.1 Gen1 Header (Supports 2 USB 3.1 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.
BIOS	- 128Mb AMI UEFI Legal BIOS with multilingual GUI support - Supports "Plug and Play" - ACPI 5.1 compliance wake up events - Supports jumperfree - SMBIOS 2.3 support - DRAM Voltage multi-adjustment	- 128Mb AMI UEFI Legal BIOS with multilingual GUI support - Supports "Plug and Play" - ACPI 5.1 compliance wake up events - Supports jumperfree - SMBIOS 2.3 support - DRAM Voltage multi-adjustment
Support CD	- Drivers, Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and Toolbar	- Drivers, Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and Toolbar
Software and UEFI	Software - ASRock Motherboard Utility (A-Tuning) - ASRock Polychrome SYNC UEFI - ASRock Full HD UEFI - ASRock Instant Flash - ASRock Easy RAID Installer *These utilities can be downloaded from ASRock Live Update & APP Shop.	Software - ASRock A-Tuning - ASRock Polychrome SYNC UEFI - ASRock Full HD UEFI - ASRock Instant Flash - ASRock Easy RAID Installer *These utilities can be downloaded from ASRock Live Update & APP Shop.
Hardware Monitor	- Temperature Sensing: CPU, CPU / Water Pump, Chassis / Water Pump Fans - Fan Tachometer: CPU, CPU / Water Pump, Chassis / Water Pump Fans - Quiet Fan (Auto adjust chassis fan speed by CPU temperature): CPU, CPU / Water Pump, Chassis / Water Pump Fans - Fan Multi-Speed Control: CPU, CPU / Water Pump, Chassis / Water Pump Fans - CASE OPEN detection - Voltage monitoring: +12V, +5V, +3.3V, Vcore	- Temperature Sensing: CPU, CPU / Water Pump, Chassis / Water Pump Fans - Fan Tachometer: CPU, CPU / Water Pump, Chassis / Water Pump Fans - Quiet Fan (Auto adjust chassis fan speed by CPU temperature): CPU, CPU / Water Pump, Chassis / Water Pump Fans - Fan Multi-Speed Control: CPU, CPU / Water Pump, Chassis / Water Pump Fans - CASE OPEN detection - Voltage monitoring: +12V, +5V, +3.3V, Vcore
OS	- Microsoft Windows 10 64-bit / 11 64-bit* *Summit Ridge do not officially support Windows 11.	- Microsoft Windows 10 64-bit / 11 64-bit* *Summit Ridge do not officially support Windows 11.
Certifications	- FCC, CE - ErP / EuP ready (ErP / EuP ready power supply is required)	- FCC, CE - ErP / EuP ready (ErP / EuP ready power supply is required)
Accessories	- Quick Installation Guide, Support CD, I / O Shield - 2 x SATA Data Cables - 2 x Screws for M.2 Sockets	- Quick Installation Guide, Support CD, I / O Shield - 2 x SATA Data Cables - 2 x Screws for M.2 Sockets