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Description
Asus PRIME H840M-A-CSM AM5 Micro ATX MotherboardQuick Specs Supports AMD Ryzen 7000 8000 9000 Series Processors for powerful performance. Features PCIe 4. 0 slot for lightning fast graphics card and SSD speeds. Includes SafeSlot Core+ for enhanced PCIe slot strength and durability. Offers BIOS FlashBack for simple and safe BIOS updates. Equipped with a pre mounted I O shield for easy installation and protection. Built for Today's Demands ASUS PRIME series motherboards are expertly engineered to
Quick Specs
- Supports AMD Ryzen 7000/8000/9000 Series Processors for powerful performance.
- Features PCIe 4.0 slot for lightning-fast graphics card and SSD speeds.
- Includes SafeSlot Core+ for enhanced PCIe slot strength and durability.
- Offers BIOS FlashBack for simple and safe BIOS updates.
- Equipped with a pre-mounted I/O shield for easy installation and protection.
Built for Today's Demands
ASUS PRIME series motherboards are expertly engineered to unleash the full potential of AMD Ryzen 7000/8000/9000 series processors. Boasting a robust power design, comprehensive cooling solutions, and intelligent tuning options, the PRIME B650M-A-CSM provides everyday users and PC DIY builders with a range of performance optimisation options via intuitive software and firmware features.
Lightning-Fast Connectivity
Experience next-level speed with the PCIe 4.0 slot, supporting the latest graphics cards and NVMe SSDs. Enjoy data transfer rates that are twice as fast as the previous generation, ensuring your system is ready for demanding tasks such as gaming, content creation, and productivity. This ASUS AM5 motherboard ensures your system remains cutting edge.
EZ PC DIY Design
Building a PC has never been easier. The PRIME B650M-A-CSM incorporates numerous DIY-friendly designs, including SafeSlot Core+ for enhanced PCIe slot retention and Q-LED Core for simple troubleshooting. The pre-mounted I/O shield streamlines the installation process and protects against electrostatic discharge. This AM5 micro ATX motherboard simplifies the build process.
Dependable Stability
ASUS motherboards are renowned for their durability and long-term reliability. The PRIME B650M-A-CSM utilises high-quality components, comprehensive cooling solutions, and rigorous testing to ensure it can withstand the demands of continuous use, providing you with a stable and dependable platform for years to come.
Optimised Cooling
The PRIME B650M-A-CSM features comprehensive cooling controls that are configurable via Fan Xpert 2+ software or via the UEFI BIOS. Multiple temperature sensors and dedicated fan headers allow you to optimise cooling performance based on your system's specific needs, ensuring stability and preventing thermal throttling, even under heavy workloads. The ASUS AM5 motherboard provides excellent thermal management.
FEATURES:
- Intel H840M Chipset
- Supports AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors
- Supports DDR5 Memory, Dual Channel DDR5 7600+ MT/s (OC) 256GB max capacity
- Ultra-fast Realtek 2.5G Ethernet LAN
- Lightning Fast Game experience_ PCIe 4.0 slot support
- Asus Fan Xpert 2+ for more cooling control
- EZ PC DIY_ SafeSlot Core+ and Q-LED Core, BIOS Flashback, and a pre-mounted I/O shield for easy usage
- Aura Sync support for full RGB lighting control
SPECIFICATIONS:
- CPU:
- AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors*
- * Refer to https_//www.asus.com/support/download-center/ for CPU support list.
- Chipset: AMD B840 Chipset
- Memory:
- 4 x DIMM slots, max. 256GB, DDR5
- Supports up to 7600+MT/s (OC) with Ryzen™ 9000 & 8000 & 7000 Series Processors, ECC and Non-ECC, Un-buffered DIMM*
- Dual channel memory architecture
- Supports AMD Extended Profiles for Overclocking (EXPO™)
- ASUS Enhanced Memory Profile (AEMP)
- * Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration
- * Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
- Graphics:
- 2 x DisplayPort**
- 1 x HDMI™ port***
- * Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.
- ** Supports max. 8K@30Hz as specified in DisplayPort 1.4.
- *** Supports 4K@60Hz as specified in HDMI 2.1.
- Expansion Slots_
- AMD Ryzen™ 9000 & 7000 Series Desktop Processors*
- 1 x PCIe 4.0 x16 slot (supports x16 mode)
- AMD Ryzen™ 8000 Series Desktop Processors
- 1 x PCIe 4.0 x16 slot (supports x8/x4 mode)**
- AMD B840 Chipset
- 2 x PCIe 3.0 x16 slots (support x1 mode)
- * Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/).
- ** Specifications vary by CPU types.
- To ensure compatibility of the device installed, please refer to https_//www.asus.com/support/download-center/ for the list of supported peripherals.
- Storage:
- Total supports 3 x M.2 slots and 4 x SATA 6Gb/s ports
- AMD Ryzen™ 9000 & 7000 Series Desktop Processors
- M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
- M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
- AMD Ryzen™ 8000 Series Desktop Processors
- M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
- M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4/x2 mode)*
- AMD B840 Chipset
- M.2_3 slot (Key M), type 2280 (supports PCIe 3.0 x4 mode)
- 4 x SATA 6Gb/s ports
- * Specifications vary by CPU types.
- RAID:
- AMD RAIDXpert2 Technology
- Ryzen™ 9000 Series Processors_ RAID 0/1/5/10
- Ryzen™ 8000 Series Processors_ RAID 0/1
- Ryzen™ 7000 Series Processors_ RAID 0/1/10
- Ethernet:
- 1 x Realtek 2.5Gb Ethernet
- ASUS LANGuard
- Rear USB (Total 7 ports):
- 2 x USB 10Gbps ports (2 x Type-A)
- 1 x USB 5Gbps port (1 x USB Type-C®)
- 4 x USB 2.0 ports (4 x Type-A)
- Front USB (Total 7 ports)
- 1 x USB 5Gbps connector (supports USB Type-C®)
- 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
- 2 x USB 2.0 headers support 4 additional USB 2.0 ports
- * USB Type-C® power delivery output_ max. 5V/3A
- Audio:
- Realtek 7.1 Surround Sound High Definition Audio CODEC*
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- Supports up to 24-Bit/192 kHz playback
- Audio Features_
- Audio Shielding
- Premium audio capacitors
- Dedicated audio PCB layers
- *A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
- Back Panel I/O Ports_
- 2 x USB 10Gbps ports (2 x Type-A)
- 1 x USB 5Gbps port (1 x USB Type-C®)
- 4 x USB 2.0 ports (4 x Type-A)
- 2 x DisplayPort
- 1 x HDMI™ port
- 1 x Realtek 2.5Gb Ethernet port
- 3 x Audio jacks
- 1 x BIOS FlashBack™ button
- Operating System_ Windows 11, Windows 10 64-bit
- Form Factor_ Micro ATX
WHAT’S IN THE BOX_
- Asus PRIME H840M-A-CSM AM5 Micro ATX Motherboard – Black x1
- SATA Cables x2
- M.2 rubber package x1
- Screw Package for M.2 SSD x2
- Quick Start Guide x1
Why Asus?
ASUS is a globally recognised tech company renowned for quality and innovation. For over three decades, ASUS has consistently delivered cutting-edge PC components and electronics, earning the trust of gamers, professionals, and everyday users alike. Choose ASUS for reliability, performance, and a commitment to pushing the boundaries of what's possible. When building your next PC, an ASUS AM5 motherboard is a solid foundation.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Solid, powerful, rechargeable
Color: Black
Very impressed with its weight, speed and performance. The dial is great
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Reviewed in the United States on May 29, 2026
★★★★★ 4
Very nearly the perfect frother for all your basic frothing & mixing needs
Color: Black
There are a lot of middle-of-the-road frothers out there. I've been through a few of them in my recent search for something that could mix and froth well, without taking up any more outlets in my basement kitchen. Of the three Maestri frothers I've tried so far, this one wins the race by a nose.
Most recently, these Maestri frothers come in basically three versions: A single-speed @ 8000 RPM, a two-speed @8000/5500 RPM, and this stepless variable-speed version. Aside from that, the only real difference in recent version pack-outs is which attachments they come with.
Look over the reviews of the single-speed version and you'll find that while it can and does froth well, it starts at a single, high speed and gets there fast. This makes it pretty easy to spin liquid right out of most common cups and mugs.
There is a two-speed version, but it's harder to find, only comes in one color (Grape Purple), and while it's much better than the Maestri single-speed, it still has a couple of quirks that make this variable-speed version win out.
This mixes and froths whole milk, half-and-half, or heavy whipping cream, or just about anything else very well. Like all frothers, it takes a little time to learn its nuances and nail down the technique, this will definitely get you there.
The best feature of this is easily the speed control. Turn the knob to turn it on at a low speed that's great to get things started, then turn the knob to crank up the speed just enough to do what you need, whether that's mixing or frothing. The low starting speed makes it easy to keep things under control without undue spilling, and the max speed is more than enough to make quick work of getting your froth on.
There are really only two complaints I have with this stepless, variable speed version:
- I'd really like to have a Press On / Release Off button in addition to the Speed Control knob. More than one time have I gone to turn this off, only to spin the knob the wrong way and crank the speed up to ludicrous, sloshing liquid on the counter. Being able to turn it Off just by letting go of the button would be quick and easy. This configuration would allow using a preferred speed right from the start, while still allowing speed to be adjusted on-the-fly when needed.
- Give it a bigger battery. It would cost mere pennies to give this a 2000mAH+ instead of a 1200mAH battery, and I can't think of any reasonable downside to that.
- Give the motor a little more torque. It's fairly easy for the current motor, at any speed, to get bogged down in a thick protein powder mix, or when pressing the frother or other attachment a bit too hard into the bottom or side of the frothing container. A bit more "oomph" would prevent that.
I really like the overall design and features of thes Maestri frothers better than many other, cheaper versions. This variable-speed version is pretty great as it is and probably the one I would recommend over the single- or two-speed, for most people. But I often find myself using two hands -- one to hold it steady, and the other to turn it on and tweak the knob to the desired speed(s) -- for a device that should arguably need only one hand to use. Just a couple of minor tweaks as noted above would make this the overall best frother of its type that I've used.
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Reviewed in the United States on May 23, 2025
★★★★★ 5
Hands down, the BEST handheld frother I've ever used!
Color: Black
Hands down, the BEST handheld frother I've ever used! I got the black one, but any color will have the same results.
Over the past 12 years or so, I've used so many different handheld frothers and they've ALL fallen short of expectations for quality, longevity, power, features, and usability.
I've used everything from cheap, $15 models to $50+ models and everything in-between. Some with fancy attachments for various types of mixing, frothing, beating, whipping, etc. Some with rechargeable batteries, some without. Some AC powered, some with fixed whisks, some with detachable/replaceable whisks, some with stands, etc. NONE have been spectacular. Most broke within 6 months and got tossed. ALL were major disappointments in the end, including the "revered" Zulay models of which I tried several.
I finally found this Maestri House branded, variable speed frother with detachable / replaceable whisks and got one to try. I was literally on Cloud Nine the first time I turned it on. Like, WOW! Not only was it FAST on the highest speed, but it was powerful enough to churn right through milk, eggs, cream, etc, without bogging down like many others.
This thing makes milk froth like a milkshake and Matcha Lattes like nothing else I've ever experienced. I used to have to sift my Matcha, then whisk it in hot water, then froth milk and then blend them together to make the perfect latte. and if the milk was cold (my preference), pre-whisking in hot water was a must to avoid lumps. However, with THIS frother? I literally pour my milk into a tall tumbler, drop in un-sifted Matcha powder, and spin up the Maestri House frother at first on a medium low speed to get it mixed, then jump straight to the highest speed to really whip that milk and match up. After about 30-45 seconds, I've got the thickest, richest, smoothest, most aerated latte around. And NO LUMPS at all!!! What a time and dish saver!
And cleaning? I just run it under hot running water to get the shaft cleaned and then spin it up in a dish with hot running water for a few moments, then spin it on high for a few seconds in the air to dry it off instantly.
Now, I'll be honest here, too. The specs say it can go months on a charge, using it for a couple minutes a couple times daily. Well, I guess it could do that and still spin. But I use it FULL SPEED, churning hard for at least a minute a couple times per day. After about 2 weeks, I can start to notice a speed reduction so I just plug it back in on the charger. All things considered, this is still better than all the other handheld frothers I've used over the years.
After using the heck out of this thing for the past 7 months, I've even decided to start selling these in our Japanese gift shop. The manufacturer is has been very responsive both in customer support (I called them about an issue I thought I was having, and they called me back with a couple hours even though I didn't leave voicemail when they didn't answer right away) and in reseller support. I have to give these guys an A+ for responsiveness and quick resolution when problems might arise.
HIGHLY recommended!!
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Reviewed in the United States on October 17, 2025
★★★★★ 5
Great Addition!
Color: Black
Why did you pick this product vs others?:
I just started a powdered drink routine recently and was having a difficult time mixing it with water. I would consistently end up with small nuggets of mix making it unenjoyable to drink. I knew I needed a mixer and was glad I found this device when I did. It works perfectly! I like the fact that it comes with its own stand and included two mixing heads. It is solid, well-designed, and you can feel the quality when you pick it up. The variable speed of the mixer is perfect for ensuring that everything is blended well. I haven’t used it to “froth” anything yet, at least not on purpose, but I accidentally found out that it can do that well. This is a great addition to our kitchen and is very easy to wash after use. So far…no issues. Highly recommend for those of you looking for the right tool to make sure those protein mixes aren’t full of unmixed nuggets.
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Reviewed in the United States on June 21, 2025
★★★★★ 4
Low foam
Color: Black
Love this frother. It is great quality and the turn speed is amazing. My only issue is this. It comes w 2 wands and they are both singles. The single is great for stirring things up. It does not make a lot of froth and for some things it’s perfect but sometimes I like a lot of froth and I wish it either came w a single and a double or you could purchase a double separately to intermix. I don’t want to buy a whole other unit just for the double. I wrote to them bc the double frother they sell doesn’t look as good as this one but sometimes a girl needs a lot of foam and sometimes th stirring is perfect.
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Reviewed in the United States on February 20, 2026