THFKLXT X399 STR4 Threadripper Motherboard vs THFKLXT Computer Motherboards (2026): Key Differences
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When evaluating thfklxt PC motherboard vs computer motherboards, you are comparing two distinct platforms from the same brand. Both models prioritize stable performance and multitasking capabilities for demanding workloads. The primary difference lies in their generation and target hardware. One board supports older Threadripper processors with DDR4 memory, while the other targets modern Ryzen CPUs with DDR5 and PCIe 5.0 speeds. This choice depends entirely on your existing components and future upgrade path.
Key differences
| Aspect | THFKLXT X399 STR4 Threadripper Motherboard | THFKLXT AM5 E-ATX Motherboard |
|---|---|---|
| CPU Socket | STR4 | AM5 |
| Chipset | X399 | X670E |
| Memory Type | DDR4 | DDR5 |
| PCIe Version | PCIe 3.0 | PCIe 5.0 |
| M.2 Slots | 3 | 4 |
| Form Factor | not listed | E-ATX |
Which one should you choose?
Choose THFKLXT X399 STR4 Threadripper Motherboard if
- You already own an AMD Threadripper processor and DDR4 RAM.
- You need a platform optimized for legacy high-core-count workstations.
Choose THFKLXT AM5 E-ATX Motherboard if
- You are building a new system with modern Ryzen processors.
- You want faster storage and graphics connectivity via PCIe 5.0.
Verdict: Choose the X399 STR4 model if you are maintaining or upgrading an existing Threadripper workstation. Select the X670E AM5 board if you are starting a new build with modern Ryzen CPUs and want the latest memory and expansion standards.
Platform Generation and Hardware Specs
CPU Socket Compatibility
Product A, the THFKLXT X399 STR4 Threadripper Motherboard, uses the STR4 socket. This specific socket is designed for AMD Ryzen Threadripper processors, specifically supporting models like the 2950X and 2970X. This makes it a specialized choice for high-end workstation builds from an older generation. Product B, the THFKLXT AM5 E-ATX Motherboard, features the AM5 socket. This modern socket supports a wide range of Ryzen 7000 and 9000 series desktop CPUs, including the 7800X3D and 9900X. The AM5 platform offers a broader selection of current mainstream and high-performance desktop processors compared to the niche Threadripper focus of the X399.
Memory Technology
Memory type is a critical differentiator between these two boards. Product A relies on DDR4 memory. While DDR4 is a mature and stable technology, it generally offers lower bandwidth and higher latency compared to its successor. Product B utilizes DDR5 memory. DDR5 provides significantly higher data transfer rates and improved power efficiency. This upgrade allows for faster read and write speeds, which enhances system responsiveness. The dual-channel design on Product B further boosts these speeds, making it better suited for large-scale games and professional software that demand rapid data access. DDR5 is the clear choice for future-proofing your build.
PCIe Version and Bandwidth
The version of PCIe supported by each motherboard dictates how fast data moves between the CPU and expansion cards. Product A supports PCIe 3.0. This version provides sufficient bandwidth for many current devices but can become a bottleneck for the latest high-speed storage and graphics hardware. Product B supports PCIe 5.0. This newer standard doubles the bandwidth of PCIe 4.0 and significantly exceeds PCIe 3.0. This allows for much faster data transmission channels for high-speed solid-state drives and discrete graphics cards. If you plan to use the latest top-tier components, PCIe 5.0 ensures you can fully leverage their performance potential without restriction.
M.2 Slot Count
Storage expansion options vary between the two models. Product A includes three M.2 slots. This allows you to install multiple high-speed NVMe solid-state drives for your operating system, games, and work files. Product B offers four M.2 slots. This additional slot provides more flexibility for storage configurations. You can install more drives without needing to rely on SATA ports or expansion cards. For users who manage large media libraries or require extensive local storage for professional workflows, the extra M.2 slot on Product B offers greater capacity and organization options directly on the motherboard.
Form Factor and Size
The physical size of the motherboard determines which cases it will fit into. Product A is listed with a size of One Size, but its X399 chipset and STR4 socket typically align with ATX or E-ATX dimensions common in workstation builds. Product B is explicitly defined as an E-ATX form factor. E-ATX boards are larger than standard ATX boards, offering more real estate for components and cooling solutions. This size can be advantageous for airflow and component spacing but requires a case with sufficient space. If you have a standard ATX case, Product B might not fit, whereas the X399 board may be more compatible with traditional mid-tower cases.
Which motherboard fits your build needs
Threadripper users needing legacy support
Choose this board if you are building with an AMD Ryzen Threadripper processor. The STR4 socket ensures compatibility with older high-end chips like the 2950X. It provides three M.2 slots and PCIe 3.0 connectivity, which is sufficient for your existing storage and expansion cards without requiring a platform upgrade.
Users wanting latest AMD Ryzen 9000 support
Select this model for modern AMD Ryzen 9000 series processors. The AM5 socket and X670E chipset support the newest CPUs. It features DDR5 memory for faster data access and four M.2 slots. The PCIe 5.0 standard offers higher bandwidth for future graphics cards and high-speed NVMe drives compared to older standards.
Builders prioritizing maximum expansion slots
This E-ATX motherboard offers more physical space and connectivity options. It includes four M.2 slots versus three on the other model. The larger form factor accommodates more expansion cards and better airflow for the X670E chipset. You get the latest PCIe 5.0 lanes for top-tier peripheral performance.
Users needing DDR5 memory speed
If memory bandwidth is critical for your workflow, this board supports DDR5 RAM. This technology provides higher transfer rates than the DDR4 memory used by the STR4 platform. Combined with the dual-channel design and X670E chipset, it delivers better throughput for video editing and large data processing tasks.
The products compared
THFKLXT X399 STR4 Threadripper Motherboard
Best for: Threadripper 2950X/2970 multitasking workstations
- CPU Socket
- STR4
- Chipset
- X399
- Memory Type
- DDR4
- PCIe Version
- PCIe 3.0
- M.2 Slots
- 3
- Use Case
- Gaming
View on Amazon: THFKLXT X399 STR4 Threadripper Motherboard Affiliate link
This THFKLXT board uses the X399 chipset and STR4 socket to support AMD Threadripper 2950X and 2970 CPUs. It features three M.2 slots and DDR4 memory support on PCIe 3.0 lanes. You get improved data processing speeds and faster transmission channels for high-speed SSDs and discrete graphics cards. This setup is designed for users who need smooth multitasking for large games and video editing software without lag.
Pros
- Supports Threadripper 2950X and 2970 processors via STR4 socket
- Includes three M.2 slots for storage expansion
- Uses X399 chipset for improved data processing speeds
- Provides faster data transmission for high-speed SSDs and graphics cards
Cons
- Limited to PCIe 3.0 bandwidth instead of newer standards
- Only supports DDR4 memory modules
- Specific compatibility limited to ASRock X399 Phantom Gaming 6 form factor
Good fit if
- You are building a workstation with Threadripper 2950X or 2970 CPUs
- You need multiple M.2 slots for fast storage
- You run heavy multitasking workloads like video editing
Skip if
- You require PCIe 4.0 or 5.0 connectivity
- You plan to use DDR5 memory
- You are building with AM5 or Intel platforms
Verdict: THFKLXT X399 STR4 Threadripper Motherboard fits users needing Threadripper 2950X or 2970 performance with multiple M.2 slots. It delivers the necessary bandwidth for heavy multitasking and video editing tasks.
THFKLXT AM5 E-ATX Motherboard
Best for: Large cases needing PCIe 5.0 and AM5 support
- CPU Socket
- AM5
- Chipset
- X670E
- Form Factor
- EATX
- Memory Type
- DDR5
- PCIe Version
- PCIe 5.0
- M.2 Slots
- 4
View on Amazon: THFKLXT AM5 E-ATX Motherboard Affiliate link
This THFKLXT motherboard uses the AM5 socket and X670E chipset. It supports DDR5 memory and PCIe 5.0 for high-speed data transfer. The E-ATX form factor provides ample space for components. You get four M.2 slots for storage expansion. This board suits users needing robust connectivity and modern CPU support for demanding tasks.
Pros
- AM5 socket supports Ryzen 9000 and 7000 series CPUs
- X670E chipset ensures PCIe 5.0 compatibility
- Four M.2 slots for extensive storage options
- Dual-channel DDR5 memory support for faster read/write speeds
Cons
- E-ATX form factor requires a large case
- No mention of built-in Wi-Fi or Bluetooth
- Limited color and size options available
Good fit if
- You need a motherboard for the latest AMD AM5 processors
- You require multiple M.2 slots for fast storage
- You have a large case that fits E-ATX boards
Skip if
- You prefer a smaller ATX or Micro-ATX form factor
- You need integrated wireless connectivity without adapters
- You are building a compact ITX system
Verdict: THFKLXT AM5 E-ATX Motherboard is a solid choice for builders needing PCIe 5.0 and ample M.2 slots. It fits users with large cases who want modern AM5 support.
Specifications side by side
| Spec | THFKLXT X399 STR4 Threadripper Motherboard | THFKLXT AM5 E-ATX Motherboard |
|---|---|---|
| CPU Socket | STR4 | AM5 |
| Chipset | X399 | X670E |
| Form Factor | not stated | EATX |
| Memory Type | DDR4 | DDR5 |
| PCIe Version | PCIe 3.0 | PCIe 5.0 |
| M.2 Slots | 3 | 4 |
| Use Case | Gaming | not stated |
| Series | Ryzen Threadripper | not stated |
| Size | One Size | One Size |
| Color | One Color | One Color |
| Model | THFKLXT123 | THFKLXT123 |
Frequently asked questions
Does the THFKLXT X399 support modern AM5 processors?
No. The THFKLXT X399 STR4 Motherboard uses the STR4 socket. This socket is designed specifically for AMD Ryzen Threadripper processors. It does not fit AM5 chips. If you need AM5 support, you should look at the THFKLXT AM5 E-ATX Motherboard instead.
What is the main difference between these two THFKLXT boards?
The primary difference is the CPU socket and PCIe generation. The X399 STR4 board supports Threadripper 2950X and 2970 processors with PCIe 3.0. The AM5 E-ATX board supports newer AM5 processors and offers PCIe 5.0. Choose based on your processor generation.
Is the THFKLXT X399 good for video editing?
Yes. This motherboard is best for users needing Threadripper 2950X or 2970 performance. It delivers necessary bandwidth for heavy multitasking and video editing tasks. The multiple M.2 slots also help manage large video files efficiently during your workflow.
Does the AM5 motherboard have PCIe 4.0 slots?
The data specifies PCIe 5.0 support for the THFKLXT AM5 E-ATX Motherboard. It does not explicitly list PCIe 4.0 slots. It is designed for builders needing modern AM5 support and ample M.2 slots in large cases. Check your specific GPU requirements.
Can I use this motherboard for gaming?
The THFKLXT X399 STR4 Motherboard lists gaming as a use case. It fits users needing Threadripper performance for multitasking. The AM5 E-ATX board supports modern AM5 processors. Both can handle gaming, but the X399 is optimized for legacy Threadripper chips.
Which board has more M.2 slots?
The THFKLXT X399 STR4 Motherboard provides three M.2 slots. The AM5 E-ATX Motherboard offers ample M.2 slots. The exact count for the AM5 board is not specified. The X399 is a solid choice if you need multiple M.2 connections for storage.
Is the THFKLXT AM5 board E-ATX size?
Yes. The THFKLXT AM5 E-ATX Motherboard has an E-ATX form factor. It fits users with large cases who want modern AM5 support. Ensure your case can accommodate this size before purchasing. The X399 board is listed as One Size.