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The ASUS ExpertCenter Pro ET900N G3 puts NVIDIA’s GB300 Grace Blackwell Ultra platform in a deskside tower, pairing 748GB of coherent memory with a 1,600W Titanium-rated power supply and an unusual fan aimed at its high-speed networking optics. StorageReview’s hands-on review found thoughtful details for a stationary AI system, but its handles do not make a 27kg workstation portable—and published performance figures vary too much by model and workload to reduce to one speed rating.
What the ET900N G3 is—and who it suits
The ET900N G3 is ASUS’s deskside implementation of NVIDIA’s GB300 Grace Blackwell Ultra platform on DGX Station architecture. It is designed for local AI development and inference, where a large shared memory pool and high-speed networking can matter more than the flexibility of a conventional desktop workstation.
Its defining feature is 748GB of coherent memory: ASUS lists a 72-core Grace CPU alongside Blackwell Ultra graphics, with memory shared across the platform. That makes the system relevant for teams working with large models locally, although actual model fit and serving speed depend on the model, precision, software, and workload—not memory capacity alone. ASUS advertises up to 20 PFLOPS of AI performance; StorageReview identifies that peak figure as NVFP4 with sparsity, a manufacturer specification rather than a result independently established across workloads.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →This is a specialized, high-power system for AI engineers, researchers, and organizations that need local compute. It is less compelling as a general workstation if the workload does not use the large coherent memory pool, GB300 compute, or 400GbE networking.
#1 Best Overall
- CPU: AMD Ryzen7 5700X (up to 4.6GHz) 8-Core 16-Thread to easily handle multi-line tasks
- Main board: MSI B550M-A PRO motherboard provides reliable performance and stability
- GPU: Geforce RTX 5060 8GB GDDR7 Graphics Cards (Brand may vary) Support DLSS 4 multi frame generation, ray tracing, and Reflex 2 delay optimization
- RAM: 32GB DDR4 3200MHz (16GB*2) SSD: 1TB M.2 NVMe PCIe
- Power supply: 650W (80plus bronze) certified for energy efficiency and stable performance
Key specifications
| Specification | What is established |
|---|---|
| Platform | NVIDIA GB300 Grace Blackwell Ultra; ASUS describes the system as built on DGX Station architecture. ASUS product specifications |
| CPU and graphics | 72-core Grace CPU and NVIDIA Blackwell Ultra graphics; StorageReview describes the GPU as B300. StorageReview’s September 23, 2026 review |
| Memory | 748GB coherent memory in ASUS’s current product information. StorageReview breaks the reviewed platform’s pool down as 252GB HBM3e and 496GB LPDDR5X. |
| Peak AI performance | Up to 20 PFLOPS NVFP4 with sparsity, as a manufacturer specification reported by ASUS and StorageReview; it is not a universal application benchmark. |
| Networking | Two QSFP112 400GbE ports via ConnectX-8, plus 10GbE LAN and a BMC 1GbE interface, according to StorageReview. ASUS also lists rear QSFP 400G ports. |
| Storage | ASUS lists up to four M.2 2280 PCIe 5.0 NVMe drives and up to 8TB total. The StorageReview sample had two 2TB PCIe 5.0 M.2 boot drives in RAID 1 and two open expansion slots, which the review says ASUS specified as PCIe 6.0. These are different descriptions: the sample configuration should not be assumed to describe every orderable system. |
| Power | 1,600W Titanium ATX supply; ASUS’s technical specifications list 115–240Vac input. Maximum output depends on regional input voltage and cord assembly. ASUS technical specifications |
| Cooling and software | ASUS describes a closed-loop AIO cooling system and lists Ubuntu with NVIDIA AI Developer Tools. Windows-based AI development support is described as planned, with no arrival date stated in the cited ASUS materials. |
| Size and weight | 584 × 232 × 565 mm; StorageReview reports 27kg net and 32kg gross. |
| Operating temperature | 10–35°C, according to ASUS’s technical specifications. |
Chassis and handles: easier to move, not portable
StorageReview describes a brushed-silver chassis with a dark mesh front and two handles on top. Those handles make sense for positioning the tower or moving it during service, but the reviewed system weighs 27kg net. Treat them as practical lifting points, not as a promise that this is a portable workstation. Check the intended desk or floor location, access route, and electrical supply before installation.
The review unit also contained an RTX PRO 2000 card. That is an observation about the tested configuration, not confirmation that the card is included with every ET900N G3.
Rank #2
- Legend perfected: Modern design with a matte basalt black finish in an optimized chassis with customizable AlienFX lighting zones, including the striking stadium lighting.
- Game changing graphics: Step into the future of gaming and creation with the NVIDIA GeForce RTX 5070 graphics, powered by NVIDIA Blackwell architecture.
- Marathon gaming unlocked: This high-performance technology ensures clean energy is consistently available, unleashing the top-level power of Intel Core Ultra 7 265F processor as you game, livestream, and multi-task for hours on end.
- Total command: Alienware Command Center software allows you to create and edit AlienFX lighting across the ecosystem, choose and monitor your performance mode across distinct power states, and create custom gaming profiles for your whole library.
- Dell Services: 1 Year Onsite Service provides support when and where you need it. Dell will come to your home, office, or location of choice, if an issue covered by Limited Hardware Warranty cannot be resolved remotely.
Why the optics get their own cooling fan
The cooling detail that distinguishes this chassis is a small fan directed at the ConnectX-8 QSFP112 cages. The liquid loop’s cold plate cools the network controller silicon; the optical transceivers seated in the cages can create heat of their own. Directing airflow across the cages addresses that separate heat source, which is most relevant when the system uses fiber transceivers for sustained high-speed networking.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsStorageReview notes that the optics fan matters less when using direct-attach copper (DAC) cables. That makes cabling choice part of the thermal picture: fiber deployments are the clearer use case for the extra airflow, while DAC connections reduce the relevance of cooling the optical modules. ASUS lists 400G transceivers as optional; confirm the exact transceiver and cable compatibility for the intended deployment rather than assuming accessories are included.
Rank #3
- POWERED BY RTX 5070 12GB + RYZEN 7 9700X - The GeForce RTX 5070 12GB GDDR7 graphics card pairs with an 8-core AMD Ryzen 7 9700X processor to drive smooth 1440p and 4K gameplay, giving this gaming PC the headroom for modern titles, streaming, and creative work.
- 32GB DDR5 6000MHz MEMORY & 1TB NVMe SSD - 32GB of high-speed DDR5 memory and a 1TB PCIe 4.0 NVMe solid state drive deliver quick load times, smooth multitasking, and generous storage, keeping this prebuilt gaming desktop responsive under heavy workloads.
- BUILT-IN 11.3-INCH Smart DISPLAY - An integrated smart screen shows real-time CPU and GPU temperatures, usage, and weather while you play, adding a distinctive and functional touch to your battlestation.
- 850W 80+ GOLD POWER SUPPLY, 360MM LIQUID COOLING & WiFi 7 - An 850W 80 Plus Gold certified power supply provides stable, efficient power with headroom for future upgrades, while a 360mm AIO liquid cooler, WiFi 7, and an ARGB mid-tower case keep the Ryzen 7 CPU cool and connected in a clean build.
- READY TO PLAY OUT OF THE BOX - Arrives fully assembled and tested with Windows 11 Home pre-installed, so your prebuilt gaming computer is ready to set up in minutes. Assembled in the USA, and backed by a one-year limited warranty and lifetime free technical support.
StorageReview observed copper cold plates on the GB300, SOCAMM modules, and ConnectX-8, with tubing to front and top radiators and a rear chassis fan. ASUS says its closed-loop AIO supports sustained full-load operation without thermal throttling. The hands-on review describes the cooling design, but does not establish a blanket no-throttling guarantee across every room temperature, workload, or installation.
Power supply: what Titanium does and does not tell you
The 1,600W Titanium ATX supply is appropriate to a platform built around high-power AI compute, but the Titanium label is a certification descriptor—not proof of a particular energy saving in this system. The ASUS technical page gives a 115–240Vac input range and says maximum power output varies with regional input voltage and cord assembly. Confirm the supply and included power cord for the destination region with ASUS or the seller before ordering.
Rank #4
- AMD Ryzen 7 9850X3D 4.7GHz (5.6GHz Turbo Boost) CPU Processor | 2TB Gen4 NVMe M.2 SSD – Up to 30x Faster Than Traditional HDD | 360mm AIO Liquid CPU Cooler with ARGB Fans, say goodbye to outdated and inefficient air coolers.
- AMD Radeon RX 9070 XT 16GB GDDR6 Graphics Card (Brand may vary) | 32GB DDR5 RAM 5600 Gaming Memory with Heat Spreader | Windows 11 Home
- High-spec AIO liquid coolers used, delivering unmatched cooling performance for a perfect operational experience and unparalleled cooling performance. With hardware unrestricted by temperature limits, you can unleash its full potential. Whether gaming, creating, or working, you'll never suffer from thermal throttling again. | Skytech Azure Gaming Case with Tempered Glass, Black | 1 Year Warranty on Parts and Labor | Free Technical Support | Assembled in the USA
- This powerful gaming PC is capable of running all your favorite games such as Elden Ring Nightreign, Baldur's Gate 3, Cyberpunk 2077, Hogwarts Legacy, Helldivers 2, Diablo IV, Starfield, Valorant, Counter-Strike 2, Forza Horizon 5, Resident Evil 9, Alan Wake 2, Warhammer 40,000: Space Marine 2, God of War Ragnarök, Overwatch 2, Dragon's Dogma 2, Marvel's Spider-Man, Clair Obscur: Expedition 33,, more at Ultra settings, detailed 4K Ultra HD resolution, and smooth 60+ FPS gameplay.
Performance: read the workload, not just the tokens-per-second figure
Published throughput results are not directly interchangeable. Model size, precision, prompt and output lengths, concurrent streams, and serving software all affect the result. Aggregate throughput under many concurrent requests is also different from the latency a single user experiences.
| Source and workload | Reported result | How to interpret it |
|---|---|---|
| ASUS, June 15, 2026: Qwen vLLM stress test | Approximately 864 output tokens/s | ASUS’s announcement does not specify the model details needed to compare this with the StorageReview results. |
| ASUS, June 15, 2026: extended vLLM stress test | Approximately 1,600 combined input/output tokens/s | A combined input/output figure, not an output-only result. ASUS does not give enough workload detail in the cited claim for a like-for-like comparison. |
| StorageReview, 2026: Mistral Small 24B FP8, equal 512/512 workload | 11,075 output tokens/s | A specific model, precision, and equal input/output workload; not a general system speed. |
| StorageReview, 2026: Mistral Small 24B FP8, long-prompt test at 128 streams | 2,302 output tokens/s | A different prompt and concurrency condition from the equal 512/512 result. |
| StorageReview, 2026: Qwen3 Coder 30B FP8, equal workload | 319 output tokens/s at one stream; 12,439 at 128 streams | The large gap illustrates how concurrency and batching change aggregate throughput; it does not mean a single request runs at the 128-stream rate. |
ASUS’s figures are manufacturer-reported results from its engineering team’s extended vLLM testing. StorageReview says it had its review machine in the lab for about a week for benchmarks, photography, and physical checks. Neither set of figures should be treated as a substitute for testing the models and serving configuration a buyer intends to use.
Best Value
- POWERHOUSE 8-CORE GAMING PERFORMANCE — Driven by the AMD Ryzen 7 8700F with 8 cores and 16 threads, boosting up to 5.0 GHz for smooth, responsive gameplay and the ability to handle AAA titles, streaming, and background tasks all at once
- NEXT-GEN BLACKWELL ARCHITECTURE — The NVIDIA GeForce RTX 5070 is powered by NVIDIA's cutting-edge Blackwell GPU architecture, delivering a massive generational leap in rasterization and ray tracing performance so you can experience your games the way they were meant to be played.
- Simplistic Design: Enjoy the latest generation of Windows 11 Home for your everyday needs. *MSI recommends Windows 11 Pro for business use.
- Cool While Gaming: In conjunction with an ARGB fan Air Cooler, the Codex R2 features four system cooling fans; three in the front and one in the rear to pull in cool air and push heat out of the PC.
- Turn on the Bright Lights: With the built-in RGB lighting, take your gaming experience to the next level by pressing the MSI LED button to cycle through lighting options. Customize lighting even further with MSI Center software.
Memory discrepancy: use the current 748GB figure
ASUS’s January 2026 CES announcement described 775GB of coherent memory, while its current product information and June launch release state 748GB. For the product as currently specified, use 748GB; the earlier announcement is a superseded figure, not evidence of a second current memory configuration. The reviewed platform’s 252GB HBM3e plus 496GB LPDDR5X breakdown adds up to the current total.
Buying and deployment checks
ASUS promotes presales consultation, but the published material cited here does not establish a current street price, a complete region-specific orderable configuration, or a verified retailer listing. Request a written quote that identifies the exact system configuration, included GPU and storage, operating system, support terms, power cord, and regional availability.
- Confirm the software environment. ASUS lists Ubuntu with NVIDIA AI Developer Tools. Windows-based AI development support is planned, but the cited material gives no release date.
- Match storage to the configuration. The product page’s maximum storage specification and the review unit’s drive layout are not interchangeable. Verify installed drives, open slots, and supported generation for the exact system being quoted.
- Plan networking around the deployment. Decide whether the link will use fiber transceivers or DACs, and verify accessory compatibility and availability.
- Verify site requirements. Check regional input voltage and cord assembly, cooling clearance, operating temperature, and the physical route for placing a 27kg tower.
- Benchmark representative work. Compare the same model, precision, prompt/output lengths, concurrency, and software stack; use both single-stream latency and aggregate throughput if both matter to the application.
Verdict
The ET900N G3’s strongest case is a deskside GB300 system that combines a 748GB coherent memory pool with 400GbE connectivity and cooling details aimed at sustained operation, including airflow over the optical cages. The handles are useful for deliberate placement, and the Titanium-rated 1,600W supply is a substantial power component, but neither feature makes the system light or establishes real-world efficiency by itself. It is worth considering when local AI workloads can use the platform’s memory and compute; buyers should settle the precise configuration, regional power details, software support, and workload-specific performance before committing.
Quick Recap
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