Free tools Windows power users keep installed
One-click scans. No signup required.
The ASUS B85M-E/CSM is a micro-ATX motherboard for an existing Intel LGA1150 desktop, built around the B85 chipset and DDR3 memory. It can make sense as a like-for-like replacement when the rest of the system is worth keeping, but it is not a modern-platform upgrade: its documented storage is SATA, memory tops out at 32 GB, and CPU compatibility must be checked by exact model and BIOS. ASUS’s available manual is labeled B85M-E, so verify the exact /CSM board and revision before buying or applying variant-specific specifications.
What the ASUS B85M-E/CSM is—and what this review can establish
This is a specification-led review of a legacy micro-ATX board, not a hands-on performance review. The available evidence is ASUS documentation for the B85M-E and a Kingston memory listing that explicitly names the B85M-E/CSM. ASUS’s support page likewise identifies B85M-E rather than a separate /CSM support entry. The sources therefore establish the documented B85M-E feature set and corroborate the /CSM name and broad memory capacity, but do not establish whether every /CSM revision is identical.
For a used board, compare the seller’s photos with the board’s printed model and revision, connector layout, BIOS information, and the CPU support list. The ASUS manual is dated November 1, 2013, and later manuals appear on the support page; confirm that the documentation and BIOS apply to the specific board in hand.
ASUS B85M-E/CSM specifications
| Feature | Documented specification |
|---|---|
| Form factor | Micro-ATX; exact dimensions and /CSM-specific physical differences are not established in the cited source text. |
| Socket and chipset | LGA1150 socket; Intel B85 Express chipset (ASUS, 2013). |
| Processor families | 4th-generation Intel Core i7, Core i5, Core i3, Pentium, and Celeron families; support for an individual processor depends on ASUS’s CPU support data and potentially BIOS version. |
| Memory | Four DDR3 DIMM sockets; maximum 32 GB; dual-channel; non-ECC, unbuffered; listed speeds 1600, 1333, and 1066 MHz (ASUS, 2013). Kingston’s B85M-E/CSM listing also reports four sockets and a 32 GB maximum. |
| Storage | Two SATA 3 Gb/s connectors and four SATA 6 Gb/s connectors (ASUS, 2013). |
| Expansion | One PCIe 3.0/2.0 x16 slot, one PCIe 2.0 x16-length slot running at x4, one PCIe 2.0 x1 slot, and one PCI slot. |
| Rear display outputs | D-Sub, DVI, HDMI, and DisplayPort. The manual lists maximums of 1920 × 2000 at 60 Hz for DVI and D-Sub, 2560 × 1600 at 60 Hz for HDMI, and 4096 × 2160 at 24 Hz or 3840 × 2160 at 60 Hz for DisplayPort; actual output depends on a supported processor with integrated graphics. |
| Networking and audio | Realtek 8111F Gigabit LAN and Realtek ALC887-VD2 HD audio codec. |
| USB | Four USB 3.0 total: two rear ports and two through an internal header. Eight USB 2.0 total: four rear ports and four through internal headers. |
| Original box contents | ASUS lists two SATA cables and an I/O shield. Their presence is not assured with used or incomplete listings. |
What CPU is compatible with the ASUS B85M-E/CSM?
ASUS describes the B85M-E as supporting 4th-generation Intel Core i7, i5, and i3 processors, along with Pentium and Celeron families. That family-level description is not enough to confirm a specific CPU: consult the ASUS B85M-E support page and its CPU support information for the exact processor and any required BIOS version. Do not treat an LGA1150 socket match alone as proof of compatibility.
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →#1 Best Overall
Because the support page is for B85M-E rather than a distinct B85M-E/CSM page, verify the board’s exact printed model and revision before relying on a listed BIOS or CPU entry.
How much RAM does it support?
The ASUS manual specifies four DDR3 DIMMs with a maximum capacity of 32 GB, dual-channel operation, and non-ECC unbuffered memory. The listed memory speeds are 1600, 1333, and 1066 MHz. ASUS notes that modules rated at 1600 MHz or higher using XMP operate at a maximum 1600 MHz transfer rate under the chipset limitation. Kingston’s B85M-E/CSM memory configurator independently lists four sockets and 32 GB maximum, but check the module’s exact compatibility and the specific board before purchase.
Rank #2
- Ready for Advanced AI PC: Designed for the future of AI computing, with the power and connectivity needed for demanding AI applications
- AMD AM5 Socket: Ready for AMD Socket AM5 for AMD Ryzen 9000 & 8000 & 7000 Series Desktop Processors
- Enhanced Power Solution: 8+2+1 80A DrMOS power stages, 8-layer PCB, 8+4 pin ProCool power connectors, alloy chokes and durable capacitors for stable power delivery
- Latest M.2 Support: One onboard PCIe 5.0 M.2 slot and two PCIe 4.0 M.2 slots
- Ultrafast Connectivity: Wi-Fi 6E, PCIe 5.0 x16 slot, Realtek 2.5Gb Ethernet, rear USB 10Gbps Type-C port, front USB 5Gbps Type-C connector support
Does the ASUS B85M-E/CSM support NVMe?
The cited ASUS manual documents six SATA connectors—two at 3 Gb/s and four at 6 Gb/s—and does not document an onboard M.2 slot. Do not buy this board on the assumption that it has native M.2 or NVMe support. A PCIe adapter may be a separate possibility, but the cited documentation does not establish boot support, compatibility, or performance for that setup.
Which graphics card slot does it have?
ASUS lists one PCIe x16 slot, plus a second x16-length slot that operates at x4, a PCIe x1 slot, and a legacy PCI slot. Check the board manual and physical layout before choosing a card: the secondary full-length slot is not an x16-electrical slot, and an installed card’s fit can depend on neighboring slots and case clearance.
Rank #3
- Optimized for Intel Core Ultra Processors (Series 2): Built on the Intel H810 chipset with LGA1851 socket, delivering stable performance and compatibility for next-gen AI PC applications.
- Commercial-Grade Reliability with CSM Support: ASUS Corporate Stable Model (CSM) provides extended product lifecycle, EOL notice, and IT-focused features for managed commercial deployments.
- ASUS Control Center Express (ACCE): Streamline IT management with real-time monitoring, remote BIOS updates, and asset tracking—ideal for SMBs and enterprise fleets.
- Essential Connectivity and Expansion: Features PCIe 4.0, DDR5 support, M.2 slot, HDMI, D-Sub, USB 3.2 Gen 1, and Realtek 1Gb LAN for modern commercial needs.
- Advanced Cooling and Power Design: Comprehensive cooling with VRM and PCH heatsinks, plus robust 6+1+1 power stages ensure stable power delivery and thermal efficiency.
The rear panel also includes D-Sub, DVI, HDMI, and DisplayPort outputs. These motherboard outputs require a supported CPU with integrated graphics; a discrete graphics card is a separate route to display output.
Ports, networking, audio, and accessories
The documented networking controller is a Realtek 8111F Gigabit LAN chip, and audio is handled by a Realtek ALC887-VD2 HD audio codec. The board provides four USB 3.0 ports in total and eight USB 2.0 ports in total, split between rear connectors and internal headers as shown in the specifications table.
Rank #4
- Ready for Advanced AI PC: Designed for the future of AI computing, with the power and connectivity needed for demanding AI applications.
- AMD AM5 Socket: Ready for AMD Ryzen 9000, 8000 and 7000 series desktop processors.
- Intelligent Control: ASUS-exclusive AI Overclocking, AI Cooling II, AI Networking and AEMP to simplify setup and improve performance.
- ROG Strix Overclocking technologies: Dynamic OC Switcher, Core Flex, Asynchronous Clock and PBO Enhancement.
- Robust Power Solution: 18 plus 2 plus 2 power solution rated for 110A per stage with dual ProCool II power connectors, high-quality alloy chokes and durable capacitors to support multi-core processors.
ASUS’s original package list includes two SATA cables and an I/O shield. A replacement board sold second-hand may not include either, so check listing photos and confirm the seller’s included items rather than assuming the factory bundle is intact.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Is the B85M-E/CSM worth replacing or upgrading?
It is most defensible as a replacement for a failed board in a working LGA1150 system, especially if the existing DDR3 memory, processor, storage, and case are still suitable. Buying another used board does not modernize the platform; whether it is sensible depends on the exact board condition, CPU/BIOS match, what is included, and the cost of replacing the system with a newer platform. Current stock, prices, and comparative failure rates are not established here.
Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallOutdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchQuick Recap
Best Value
- ASUS 5X Protection: All-round protection provides the best quality, reliability, and durability
- USB 3.0 BOOST (UASP Support): 170% faster transfer speeds than traditional USB 3.0
- Network iControl: Real-time network bandwidth management
- Fan Xpert :Dedicated CPU and case fan controls
- Crash Free BIOS 3: Restore corrupted BIOS data from USB storage
- Consider a like-for-like replacement if you need to retain a compatible LGA1150 CPU and DDR3 memory and the board’s SATA and I/O connections fit the system.
- Consider a platform change if you need onboard M.2/NVMe, newer connectivity, or a memory generation beyond DDR3, or if sourcing a verified board makes the overall replacement uneconomical.
- Before buying used, confirm the printed model and revision, socket condition, BIOS/CPU compatibility, connector layout, seller evidence of operation, return terms, and whether the I/O shield and cables are included.
Sources
- ASUS B85M-E User’s Manual, Version E8150, dated November 1, 2013.
- ASUS B85M-E Support — Manual & Document, listing official manuals including English versions dated November 1, 2013 and January 16, 2015.
- Kingston Technology memory listing for ASUS B85M-E/CSM, accessed 2026.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
