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ASRock B450M PRO4 AM4 AMD Promontory B450 SATA 6Gb/s USB 3.1 HDMI Micro ATX AMD Motherboard

4.6 4.6 out of 5 stars 5,068 ratings

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About this item

  • Socket AM4 Digi Power design 9 Power Phase design Supports 105W Water Cooling (Pinnacle Ridge) Supports 95W Water Cooling (Summit Ridge) Supports 65W Water Cooling (Raven Ridge)
  • Country of origin : China
  • Memory 4x DDR4-3200+(OC)/2933/2667/2400/2133 DIMM Slots Dual Channel ECC Non-ECC Unbuffered Max Capacity of 64GB (AMD Ryzen series CPUs (Pinnacle Ridge))
  • Slots 2x PCI-Express 3 0 x16 Slots (one runs at x8) 2x PCI-Express 2 0 x16 Slots (two run at x4) 1x PCI-Express 2 0 x1 Slot

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ASRock B450M PRO4 AM4 AMD Promontory B450 SATA 6Gb/s USB 3.1 HDMI Micro ATX AMD Motherboard
ASRock B450M PRO4 AM4 AMD Promontory B450 SATA 6Gb/s USB 3.1 HDMI Micro ATX AMD Motherboard
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Price-20% $98.99
Typical:$123.38
-34% $79.03
List:$119.99
-13% $86.76
List:$99.99
-8% $109.99
List:$119.99
$104.21-10% $71.99
List:$79.99
Delivery
Get it as soon as Monday, Apr 1
Get it Apr 1 - 2
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Get it as soon as Sunday, Mar 31
Get it Apr 8 - 10
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Customer Ratings
For gaming
4.3
4.7
4.5
3.9
4.1
Tech Support
3.9
4.5
4.2
3.5
3.9
Value for money
4.4
5.0
3.8
4.2
Easy to install
4.4
4.1
4.4
Stability
4.6
3.9
3.5
Sold By
Amazon.com
IPC-STORE✅
Amazon.com
Amazon.com
IPC-STORE✅
Amazon.com
platform
windows 10
windows 10
android, android, android, android, android
windows 10
no operating system
windows 10
cpu socket
Socket AM4
Socket AM4
Socket AM4
Socket AM4
Socket AM4
Socket AM4
memory slots
4
2
4
4
4
memory capacity
64 GB
32 GB
12 GB
128 GB
128 GB
128 GB
compatible processors
AMD A Series
AMD Ryzen 5000 Series, AMD Ryzen 3000 Series, AMD Ryzen 2000 Series
AMD 2nd Gerenration Ryzen
AMD A Series
AMD 1st Gerenration Ryzen
card interface
pci e
pci e
integrated, integrated
pci e
pci e
integrated

Product Description

ASRock B450M PRO4 Socket AM4/AMD Promontory B450/DDR4/Quad CrossFireX/SATA3&USB3 1/M 2/A&GBE/MicroATX Motherboard  (New Item!). Slots 2x PCI-Express 3 0 x16 Slots (one runs at x8) 2x PCI-Express 2 0 x16 Slots (two run at x4) 1x PCI-Express 2 0 x1 Slot

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Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
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ASRock B450M PRO4 AM4 AMD Promontory B450 SATA 6Gb/s USB 3.1 HDMI Micro ATX AMD Motherboard


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Customer reviews

4.6 out of 5 stars
4.6 out of 5
5,068 global ratings

Customers say

Customers like the quality, value, ease of installation, and performance of the motherboard. For example, they mention it's an exceptional product, unbeatable at this price, and sufficient for a budget build. Some appreciate the appearance, features, and compatibility. That said, opinions are mixed on performance and memory slots.

AI-generated from the text of customer reviews

119 customers mention86 positive33 negative

Customers generally like the quality of the motherboard. They say it's a great board with multiple fan headers and RGB headers. They also mention it'll be an exceptional product if not overclocking. Overall, customers find it to be an affordable yet high quality motherboard. It has amazing performance and is perfect for entry level gaming.

"...So far so good, great MoBo, all the addressable RGB still works great (Wraith Spire LED, Corsair RGB Fans, LED strips), will probably buy another..." Read more

"...motherboard, very easy to install and is honestly a perfect motherboard for entry level gaming...." Read more

"...I run it in a Fractal Define C min TG case. Lovely combo and easy build." Read more

"...The IO shield is flimsy and stamped out of a single piece of metal without paint.The super speed M.2 and Sata ports work...." Read more

100 customers mention90 positive10 negative

Customers are satisfied with the value of the motherboard. They mention that it is unbeatable at this price, one of the cheapest ones with 2x m.2 connectors and 2x PCIe 16x lanes, and has great features for the price. Some say that it's sufficient for a budget build and has good quality. Overall, most are happy with their purchase and recommend it to others.

"...would definitely recommend this board due to the features it offers at the price point. Neither have failed me yet...." Read more

"...Once again, a great entry level board for new gamers, great affordable price, nice build quality" Read more

"...Overall, it's nice mainboard and worth the money. My system(2x8gb 2666Mhz, Ryzen 5 3600, 512 SSD, ATI WX9100 card etc.) runs smoothly like a charm." Read more

"It’s a good motherboard and unbeatable at this price." Read more

69 customers mention63 positive6 negative

Customers find the installation of the motherboard to be easy. They mention that the BIOS is easy to interact with, and the installation went well. They also say the motherboard is simple and easy to build. Customers also say that multi app processing is quick and easy, and that it's easy to do a bios update.

"...and no stress installing the motherboard, very easy to install and is honestly a perfect motherboard for entry level gaming...." Read more

"...I run it in a Fractal Define C min TG case. Lovely combo and easy build." Read more

"...Pros:-- Easy to setup-- Lots of features, including easy to do OC-- Works flawlessly with Ryzen 5 3600 out of box--..." Read more

"...Internet, word processing, multimedia, and multi app processing is quick and easy. My cpu averages 45 c under heavy load...." Read more

23 customers mention20 positive3 negative

Customers like the appearance of the motherboard. They say it looks good, is nice for the form factor, and is not gimmicky or blingy. The board is easy to install and has a nice color. The BIOS layout is also appreciated by customers. The layout was pretty much identical, making the change not difficult at all.

"...It is also a handsome board. Not gimmicky or blingy but has RGB headers for those inclined. I run it in a Fractal Define C min TG case...." Read more

"...I honestly think this is a great looking mid range 450 pro board that does everything I need...." Read more

"...I got this board because it wasn't fancy. No RGB, no weirdly placed heat sinks to give the illusion they're actually cooling something...." Read more

"...I set the silent option, and it was really quiet and cool...." Read more

19 customers mention16 positive3 negative

Customers like the features of the motherboard. For example, they say it has plenty of features for a solid price, it's extremely versatile, and has excellent IO options. The BIOS is also pretty good and has many settings that you would need to use. Overall, most are happy with the product and find it to be an excellent option for an entry-level or mid-level PC build.

"...Pros:-- Easy to setup-- Lots of features, including easy to do OC-- Works flawlessly with Ryzen 5 3600 out of box--..." Read more

"...good to see that it has a thunderbolt connector, along with its excellent IO options...." Read more

"...I'm actually impressed with the ASRock Utility app which you can get on their website...." Read more

"...It is extremely versatile!I used this with an AMD Ryzen 3 2200G processor and so far everything has worked out great...." Read more

17 customers mention14 positive3 negative

Customers like the compatibility of the motherboard. For example, they say it fits most AMD processors, has an easy installation process, and is perfect for their needs. Some mention that the board is small and easy to take. Overall, most are satisfied with the compatibilITY and performance of the product.

"...pc builds due to the memory compatibility, cpu socket, and cpu compatibility...." Read more

"...The size of this thing is amazing and even more amazing for all the slots, AIOs, it has...." Read more

"...Super good compatibility and options to set up, colorful cooling system capability options, and USB C port." Read more

"I loved this motherboard it has all the slots I need and is small which makes it easier to take out my case when I need too and it’s already ryzen..." Read more

101 customers mention62 positive39 negative

Customers are mixed about the performance of the motherboard. Some mention that it performs great, runs perfectly with Ryzen 5000, and takes the power and performance perfectly. However, others say that they had issues getting the board to power initially, had a weird problem where it wouldn't restart after a shutdown, and that the GbE NIC is defective.

"...Still have the 64GB of RAM installed (definitely overkill), works great so I guess I'll keep them in since the workstation is getting different RAM..." Read more

"...Cons:-- Not supporting high frequency memory out of box, like 3200mHz, you have to adjust bios to make it work, and according to ASRock support..." Read more

"...AMD Radeon RX 5500XT 8GB graphics card and the motherboard takes the power and performance perfectly, no overvolts..." Read more

"I love this board, perfect for what I need...." Read more

47 customers mention26 positive21 negative

Customers are mixed about the memory slots. Some mention that the board comes with 4 memory module slots available, while others say that it blocks some of the SATA ports.

"...It has two 12 volt RGB and a 5v RGB header, heat sinks on the VRAM, 4 DIM slots, two M.2 slots (one can be used for NVMe), easy BIOS, works out of..." Read more

"...And further more, the port didn't support the second nvme I installed, so like I said earlier, I bought an enclosure for it and I'm actually happy..." Read more

"...prebuilt/budget gaming pc builds due to the memory compatibility, cpu socket, and cpu compatibility...." Read more

"...I bought mine used, and paid the price for it. The used model has a broken port. I had to buy an additional sound card to plug in headphones...." Read more

One of the better motherboards for Ryzen I have used; plenty of headers for lights and accessories.
5 Stars
One of the better motherboards for Ryzen I have used; plenty of headers for lights and accessories.
I have this board for two builds. The price is right and offers features on more expensive boards. It has two 12 volt RGB and a 5v RGB header, heat sinks on the VRAM, 4 DIM slots, two M.2 slots (one can be used for NVMe), easy BIOS, works out of the box for every Ryzen 1st gen I have tried. I have another ASROCK board around the same price point and it has no RGB headers, no heat sinks over the VRAM and just two DIM slots and one M.2 slot. It has more features than an MSI board I had used for another Ryzen build that was nearly double the price. One is outfitted with a Ryzen 5 1600X with 32GB of G-Skill Flare X, an M.2 SSD, 2TB HDD and NVIDIA 1060 6GB, the other is a Ryzen 7 1700, 32GB of G-Skill FlareX, Patriot M.2 SSD, Western Digital M.2 SSD, SATA3 SSD, 4TB HDD, RX580 8GB.If you're building a Ryzen 1st or 2nd gen machine, I would definitely recommend this board due to the features it offers at the price point. Neither have failed me yet.05/12/20 Update: Now I have one rocking a Ryzen 5 3600X with a BIOS update to 3.50. No issues.05/20 to 10/20 Update: Transplanted the motherboard into an HTPC case so I can fit into a smaller space in my entertainment system and game on my 65" TV. So upgraded to a GTX 1660 6GB card (because of small form factor) and 32GB (4X8GB) or G.Skill Trident RGB RAM DDR4 2400 overclocked to 3200 that I had sitting around. Everything worked fine and all games were buttery smooth.Being the eternal tinkerer, I can't leave well enough alone so I decided to max out the RAM at 64GB with some G.Skill Aegis (4X16GB) DDR4 3200 I had laying around for a different build (workstation), I needed to test the RAM and make sure it worked and to run Memtest before the return window closed. I pulled the 4 sticks of overclocked G.Skill Trident RGB out, and tossed 4 sticks of the G.Skill Aegis RAM in....wouldn't boot up :(This is a common issue I have run into when building rigs, my usual solution when building a new rig or introducing new RAM if it doesn't boot with all RAM installed is to start off with 1 stick in the primary RAM slot, which worked in this case. I let it boot into BIOS, verify the RAM, then shut it down. For testing purposes, I did this with the remaining sticks of RAM, had to make sure they all worked. Then I installed two sticks of RAM, booted into BIOS, shut it down. Tossed in the next two sticks of RAM, booted into BIOS, set XMP, reboot into windows and wham, I'm in.Because I can't leave well enough alone, I went back into BIOS and tried overclocking the RAM....NOPE - would not overclock showing the limitations of cheap G.Skill Aegis RAM versus the much more expensive G.Skill Trident RGB sticks which can be cranked up. Still have the 64GB of RAM installed (definitely overkill), works great so I guess I'll keep them in since the workstation is getting different RAM anyway. So far so good, great MoBo, all the addressable RGB still works great (Wraith Spire LED, Corsair RGB Fans, LED strips), will probably buy another board for another build to use up spare parts I have laying around, like the G.Skill Trident RGB sticks I just pulled out. It has kinda raised in price a little bit though (thanks to Linus Tech Tips), so I have looked at other MoBo's in the same price range, they just don't have the feature set so looks like I'll pick up #3.Update 11/24/20I like this board so much that I bought another one. Now I have covered 1st, 2nd and 3rd gen Ryzen on it. By the way, this latest one had the sticker that it was 3rd Gen Ryzen ready, but I stuck a 2700X in this one. I added a few pics, Darkflash Mesh case, Neon lights really make it pop, why not, it has two 12v RGB headers and a 5v RGB header. This build was to mop up parts I had laying around.
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Top reviews from the United States

Reviewed in the United States on June 20, 2019
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5.0 out of 5 stars One of the better motherboards for Ryzen I have used; plenty of headers for lights and accessories.
Reviewed in the United States on June 20, 2019
I have this board for two builds. The price is right and offers features on more expensive boards. It has two 12 volt RGB and a 5v RGB header, heat sinks on the VRAM, 4 DIM slots, two M.2 slots (one can be used for NVMe), easy BIOS, works out of the box for every Ryzen 1st gen I have tried. I have another ASROCK board around the same price point and it has no RGB headers, no heat sinks over the VRAM and just two DIM slots and one M.2 slot. It has more features than an MSI board I had used for another Ryzen build that was nearly double the price. One is outfitted with a Ryzen 5 1600X with 32GB of G-Skill Flare X, an M.2 SSD, 2TB HDD and NVIDIA 1060 6GB, the other is a Ryzen 7 1700, 32GB of G-Skill FlareX, Patriot M.2 SSD, Western Digital M.2 SSD, SATA3 SSD, 4TB HDD, RX580 8GB.

If you're building a Ryzen 1st or 2nd gen machine, I would definitely recommend this board due to the features it offers at the price point. Neither have failed me yet.

05/12/20 Update: Now I have one rocking a Ryzen 5 3600X with a BIOS update to 3.50. No issues.

05/20 to 10/20 Update: Transplanted the motherboard into an HTPC case so I can fit into a smaller space in my entertainment system and game on my 65" TV. So upgraded to a GTX 1660 6GB card (because of small form factor) and 32GB (4X8GB) or G.Skill Trident RGB RAM DDR4 2400 overclocked to 3200 that I had sitting around. Everything worked fine and all games were buttery smooth.

Being the eternal tinkerer, I can't leave well enough alone so I decided to max out the RAM at 64GB with some G.Skill Aegis (4X16GB) DDR4 3200 I had laying around for a different build (workstation), I needed to test the RAM and make sure it worked and to run Memtest before the return window closed. I pulled the 4 sticks of overclocked G.Skill Trident RGB out, and tossed 4 sticks of the G.Skill Aegis RAM in....wouldn't boot up :(

This is a common issue I have run into when building rigs, my usual solution when building a new rig or introducing new RAM if it doesn't boot with all RAM installed is to start off with 1 stick in the primary RAM slot, which worked in this case. I let it boot into BIOS, verify the RAM, then shut it down. For testing purposes, I did this with the remaining sticks of RAM, had to make sure they all worked. Then I installed two sticks of RAM, booted into BIOS, shut it down. Tossed in the next two sticks of RAM, booted into BIOS, set XMP, reboot into windows and wham, I'm in.

Because I can't leave well enough alone, I went back into BIOS and tried overclocking the RAM....NOPE - would not overclock showing the limitations of cheap G.Skill Aegis RAM versus the much more expensive G.Skill Trident RGB sticks which can be cranked up. Still have the 64GB of RAM installed (definitely overkill), works great so I guess I'll keep them in since the workstation is getting different RAM anyway. So far so good, great MoBo, all the addressable RGB still works great (Wraith Spire LED, Corsair RGB Fans, LED strips), will probably buy another board for another build to use up spare parts I have laying around, like the G.Skill Trident RGB sticks I just pulled out. It has kinda raised in price a little bit though (thanks to Linus Tech Tips), so I have looked at other MoBo's in the same price range, they just don't have the feature set so looks like I'll pick up #3.

Update 11/24/20
I like this board so much that I bought another one. Now I have covered 1st, 2nd and 3rd gen Ryzen on it. By the way, this latest one had the sticker that it was 3rd Gen Ryzen ready, but I stuck a 2700X in this one. I added a few pics, Darkflash Mesh case, Neon lights really make it pop, why not, it has two 12v RGB headers and a 5v RGB header. This build was to mop up parts I had laying around.
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Top reviews from other countries

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Arturo Noriega Sevilla
5.0 out of 5 stars Tarjeta madre con alto rango de compatibilidad
Reviewed in Mexico on September 22, 2021
Luci
5.0 out of 5 stars Fijne moederbord
Reviewed in the Netherlands on June 26, 2021
Jose Luis Auñón García
5.0 out of 5 stars Calidad y sencillez
Reviewed in Spain on June 14, 2021
Tyler
5.0 out of 5 stars This is a fantastic motherboard for the price, and supports Ryzen 3000 out of the box.
Reviewed in Canada on March 12, 2020
10 people found this helpful
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Sathyanarayanan
5.0 out of 5 stars Best value and lot of options for upgrade
Reviewed in India on February 2, 2021
5 people found this helpful
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