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Our pre-installed I/O shield safeguards ports, simplifies the build process, increases functionality and enhances aesthetics for PC DIY enthusiasts.
| Model | PRIME B840M-A-CSM |
| CPU | AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors* |
| Chipset | AMD B840 Chipset |
| Memory | 4 x DIMM slots, max. 192GB, 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, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/download-center/. Adjustments will be made based on the specifications of mass-produced memory products available on the market. * 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. 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 |
| USB | 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 |
| Internal I/O Connectors | Fan and Cooling Related 1 x 4-pin CPU Fan header 1 x 4-pin CPU OPT Fan header 2 x 4-pin Chassis Fan headers Power Related 1 x 24-pin Main Power connector 1 x 8-pin +12V CPU Power connector Storage Related 3 x M.2 slots (Key M) 4 x SATA 6Gb/s ports USB 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 Miscellaneous 3 x Addressable Gen 2 headers 1 x Clear CMOS header 1 x COM Port header 1 x Front Panel Audio header (F_AUDIO) 1 x S/PDIF Out header 1 x SPI TPM header (14-1 pin) 1 x 10-1 pin Front Panel System header |
| Special Features | ASUS 5X PROTECTION III – DIGI+ VRM – LANGuard – Overvoltage protection – SafeSlot Core+ – Stainless-steel back I/O ASUS Q-Design – Q-Dashboard – Q-DIMM – Q-LED Core – Q-Slot ASUS Thermal Solution – M.2 heatsink – VRM heatsink design ASUS EZ DIY – BIOS FlashBack™ button – BIOS FlashBack™ LED – Pre-mounted I/O shield Aura Sync – Addressable Gen 2 headers |
| Software Features | ASUS Exclusive Software Armoury Crate – Aura Creator – Aura Sync – Fan Xpert 2+ – Power Saving ASUS DriverHub TurboV Core ASUS CPU-Z Norton 360 Deluxe (60 Days Free Trial) WinRAR (40 Days Free Trial) UEFI BIOS ASUS EZ DIY – ASUS CrashFree BIOS 3 – ASUS EZ Flash 3 – ASUS UEFI BIOS EZ Mode – ASUS MyHotkey |
| Remote Management Features | IT Management software supported – ASUS Control Center Express (ACCE) |
| BIOS | 256 Mb Flash ROM, UEFI AMI BIOS |
| Manageability | WOL by PME, PXE |
| Accessories | Cables 2 x SATA 6Gb/s cables Miscellaneous 1 x M.2 rubber package 2 x Screw packages for M.2 SSD Documentation 1 x ACC Express Activation Key Card 1 x Quick start guide |
| Operating System | Windows 11, Windows 10 64-bit |
| Form Factor | micro-ATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm) |
| Warranty | 3 Years |
| Note** | **Prices, Specifications & Features are subject to change without notice |
Brain Tech PC operated by Nishi Infotek LLP ships to almost all pin codes across India. We use reliable courier partners to ensure your order reaches you safely and on time.
We offer Free Shipping on most prepaid orders across India.
If a specific shipping charge applies to a small order or a remote area, it will be calculated and displayed at checkout before you make a payment.
There are no hidden charges. The total price shown at checkout is the final price.
Processing Time: Orders are usually processed and packed within 1 to 2 business days (Monday to Saturday).
Order Cut-off Time: Orders placed after 2:00 PM IST will be processed on the next business day.
Custom PCs: For Custom PC builds, please allow an additional 2-3 days for assembly and stress testing before dispatch.
Transit Time: Once shipped, the estimated delivery time is 2 to 4 business days depending on your location.
Total Delivery Time: You can expect to receive your order within 3 to 6 business days from the date of purchase.
Metro Cities: 3-4 Days
Rest of India: 4-6 Days
Remote Areas: May take slightly longer.
(Note: Delivery timelines may be impacted by public holidays, extreme weather, or courier delays beyond our control.)
We ship using trusted carriers to ensure the safety of high-value electronics:
Blue Dart
Delhivery
DTDC
Amazon Shipping
Once your order is shipped, you will receive an email and SMS with the Tracking Number and the courier company's link. You can track your package live to know the expected delivery date.
IMPORTANT:
Do not accept the package if the seal is broken, tampered with, or damaged.
Video Recording: We highly recommend making an unboxing video (without cuts) when opening your package. This is mandatory proof if you receive a damaged product or missing accessories.
If you face any issues, contact us immediately at +91 9146194675 or contact@braintechpc.in.
Currently, we do not ship internationally. We ship only within India.
If you have any questions about your shipment, please contact us:
Phone: +91 9146194675
Email: contact@braintechpc.in
Address: 1st Floor, 103, Prakashdeep Apartment, Station Road, O.T Section, Ulhasnagar, Maharashtra 421002, India
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