The ASUSTOR AS5402T and AS5404T are the same NAS inside: an Intel Celeron N5105, 4 GB of DDR4 (up to 16 GB), four M.2 NVMe SSD slots, dual 2.5GbE, three USB 3.2 Gen 2 ports and HDMI 2.0b. The difference is drive bays: the AS5402T has two (up to 36 TB raw with 18 TB drives) and the AS5404T has four (up to 72 TB raw), with a larger 120 mm fan and a slightly bigger body.
Quick pick: one or two users, mirrored backups and a compact box → AS5402T; Plex libraries, RAID 5 and room to grow → AS5404T. Both come diskless or bundled with a Seagate drive. ARC IP Networks is a trusted ASUSTOR supplier in Australia, with genuine stock, the full 3-year ASUSTOR warranty and Australia-wide delivery.
AS5402T vs AS5404T at a glance
ARC IP Networks lists these models as the Nimbustor 2 Gen2 and Nimbustor 4 Gen2; ASUSTOR's current product pages call them simply the AS5402T and AS5404T, part of the AS54 series.
| Model | In one line | Best for |
|---|---|---|
| ASUSTOR AS5402T | 2 drive bays + 4 x M.2 NVMe, Celeron N5105, dual 2.5GbE, HDMI 2.0b | Personal cloud, creators and gamers who want SSD speed in a small box |
| ASUSTOR AS5404T | 4 drive bays + 4 x M.2 NVMe, Celeron N5105, dual 2.5GbE, HDMI 2.0b | Plex servers, home studios and RAID 5 capacity |
Summarised from ASUSTOR's official product and specification pages.
ASUSTOR AS5402T vs AS5404T: full specifications
All figures come from ASUSTOR's specification pages. Lab speeds are ASUSTOR's Windows sequential results using SMB Multichannel across both 2.5GbE ports, and depend on your drives, network and computer.
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| Spec | AS5402T (2-bay) | AS5404T (4-bay) |
|---|---|---|
| Drive bays | 2 x 3.5/2.5-inch SATA | 4 x 3.5/2.5-inch SATA |
| M.2 SSD slots | 4 x M.2 2280 NVMe (PCIe 3.0 x1) | 4 x M.2 2280 NVMe (PCIe 3.0 x1) |
| Max internal raw capacity | 36 TB (2 x 18 TB) | 72 TB (4 x 18 TB) |
| Max drives with expansion units | 14 | 16 |
| Processor | Intel Celeron N5105, quad-core 2.0 GHz (burst 2.9 GHz) | Intel Celeron N5105, quad-core 2.0 GHz (burst 2.9 GHz) |
| Memory | 4 GB DDR4 (1 x 4 GB), 2 slots | 4 GB DDR4 (1 x 4 GB), 2 slots |
| Maximum memory | 16 GB (2 x 8 GB) | 16 GB (2 x 8 GB) |
| Network | 2 x 2.5GbE | 2 x 2.5GbE |
| USB | 3 x USB 3.2 Gen 2 (10 Gbps) | 3 x USB 3.2 Gen 2 (10 Gbps) |
| Video output | 1 x HDMI 2.0b | 1 x HDMI 2.0b |
| Infrared receiver | Yes | Yes |
| Hot-swappable drives | Yes | Yes |
| Lab read / write | 576 / 566 MB/s (RAID 1) | 576 / 566 MB/s (RAID 5) |
| System fan | 1 x 70 mm | 1 x 120 mm |
| Noise level (HDD idle) | 18.6 dB | 19.7 dB |
| Power consumption | 22.9 W operation, 12.7 W disk hibernation, 0.71 W sleep | 38.3 W operation, 17.7 W disk hibernation, 0.81 W sleep |
| Power adapter | 65 W | 90 W |
| Size (H x W x D) | 170 x 114 x 230 mm | 170 x 174 x 230 mm |
| Weight | 1.71 kg | 2.26 kg |
| Warranty | 3 years | 3 years |
Source: ASUSTOR specifications for AS5402T and AS5404T. Raw capacity varies by RAID type.
Two bays or four: the real decision
With two bays, the AS5402T is usually set up as RAID 1: both drives hold the same data, so you get the capacity of one drive and protection if the other fails. With four bays, the AS5404T can run RAID 5, which keeps the capacity of three drives and still survives one failure, or RAID 6 or RAID 10 for extra protection. That makes the four-bay model better value per usable terabyte once your library grows.
Both models accept 3.5-inch and 2.5-inch SATA hard drives and 2.5-inch SATA SSDs, with hot-swappable, tool-free bays. If you outgrow either one, ASUSTOR's AS5004U and AS6004U expansion units connect over USB and take the totals to 14 drives (AS5402T) or 16 drives (AS5404T).
Four M.2 NVMe slots on both
This is what sets the AS54 series apart from entry-level NAS units. Both models have four tool-free M.2 2280 NVMe slots on PCIe 3.0 x1, with cooling vents to keep the SSDs at full speed. ASUSTOR positions them for workloads that need high random I/O, such as content creation: use them as a fast SSD volume for active projects, apps and Docker containers, or to accelerate your hard-drive volume. Hard drives for capacity plus SSDs for speed is the hybrid approach we explain in our SSD and NVMe NAS guide.
Dual 2.5GbE with SMB Multichannel
Each model has two 2.5GbE ports. A single 2.5GbE link carries up to 312 MB/s, about two and a half times Gigabit Ethernet. Combine both ports with SMB Multichannel on a Windows PC and ASUSTOR's lab measured 576 MB/s read and 566 MB/s write, the same on both models. The ports still work with a standard Gigabit switch, so you can start on your existing NBN router or switch and upgrade to a 2.5G switch later.
HDMI 2.0b, 4K playback and USB 3.2 Gen 2
Both units have an HDMI 2.0b output with 10-bit 4K hardware decoding, HEVC decoding and VP9 10-bit Profile 2 decoding, so the NAS can play 4K HDR video straight to a TV. An infrared receiver works with ASUSTOR's optional AS-RC13 remote. Plex Media Server installs from App Central, and the Celeron N5105 offers 4K transcoding.
Three USB 3.2 Gen 2 ports at 10 Gbps are twice the speed of the previous generation's USB, which helps when you back up to an external drive or copy footage off a card reader.
Size, noise and power
The AS5402T is 114 mm wide and weighs 1.71 kg; the AS5404T is 174 mm wide and 2.26 kg. Both are 170 mm high and 230 mm deep. ASUSTOR rates them at 18.6 dB and 19.7 dB respectively with the hard drives idle, and the AS5404T's larger 120 mm fan moves more air for the extra drives. In operation the AS5402T draws 22.9 W and the AS5404T 38.3 W, and both drop below 1 W in sleep mode. Power scheduling, Wake on LAN and Wake on WAN in ADM help cut running costs further.
Which AS54 NAS for which Australian buyer?
| Buyer | Suggested model | Why |
|---|---|---|
| Single user or couple backing up PCs and phones | AS5402T | Two mirrored drives, small footprint, low power |
| Gamer storing a Steam library over iSCSI | AS5402T | M.2 SSD volume, dual 2.5GbE |
| Plex household with a growing 4K library | AS5404T | Four bays for RAID 5, HDMI 2.0b, 4K transcoding |
| Photographer or YouTuber at home | AS5404T | SSD slots for active projects, hard drives for the archive |
| Home office or small team (2–5 people) | AS5404T | Snapshots, RAID 5 and room to grow |
ARC IP Networks suggestions based on ASUSTOR's official specifications.
AS5402T and AS5404T drive bundles
ARC IP Networks sells both models diskless or bundled with a Seagate hard drive already included, so the NAS works on day one and you add drives as you grow.
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| Bundle | Included drive | Drive type | Workload rating | Seagate warranty |
|---|---|---|---|---|
| AS5402T-4TB, AS5404T-4TB | IronWolf 4 TB (ST4000VN006) | NAS, 5400 RPM class, 256 MB | 180 TB/year | 3 years |
| AS5404T-8TB | IronWolf 8 TB (ST8000VN004) | NAS, 7200 RPM, 256 MB | 180 TB/year | 3 years |
| AS5402T-10TB, AS5404T-10TB | IronWolf 10 TB (ST10000VN000) | NAS, 7200 RPM, 256 MB | 180 TB/year | 3 years |
| AS5402T-12TB, AS5404T-12TB | Exos X24 12 TB (ST12000NM002H) | Enterprise, 7200 RPM, 512 MB | 550 TB/year | 5 years |
Drive figures from Seagate product manuals. The NAS itself carries ASUSTOR's 3-year warranty.
AS54 vs Drivestor Gen2 and Lockerstor Gen2+
The AS54 sits between ASUSTOR's home and business ranges. Here is how the four-bay versions compare.
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| Drivestor 4 Gen2 (AS1204T) | AS5404T | Lockerstor 4 Gen2+ (AS6704T v2) | |
|---|---|---|---|
| Processor | Realtek RTD1619B, 1.7 GHz | Intel Celeron N5105, 2.0 GHz (burst 2.9 GHz) | Intel Celeron N5105, 2.0 GHz (burst 2.9 GHz) |
| Memory | 1 GB DDR4, not expandable | 4 GB DDR4, up to 16 GB | 4 GB DDR4, up to 16 GB |
| M.2 NVMe slots | None | 4 | 4 |
| Network | 1 x 2.5GbE | 2 x 2.5GbE | 2 x 5GbE, PCIe slot for a 10GbE card |
| HDMI | Not listed | HDMI 2.0b | HDMI 2.0b |
| USB | 3 x USB 5 Gbps | 3 x USB 3.2 Gen 2 | 2 x USB 3.2 Gen 2, 1 x USB 2.0 |
| Lab read / write | 266 / 160 MB/s | 576 / 566 MB/s | 1,146 / 536 MB/s |
Source: ASUSTOR specifications. Lab speeds: RAID 5, ASUSTOR test conditions differ by model.
Choose the Drivestor Gen2 for simple, low-cost backups and photo storage. Choose the AS54 when you want M.2 SSDs, more memory and HDMI. Step up to the Lockerstor Gen2+ when an office needs dual 5GbE or a 10GbE upgrade. For an all-SSD build, see the Flashstor 6 Gen2, and for the whole range our best NAS in Australia buying guide.
Shop genuine ASUSTOR AS54 NAS
Live Australian pricing (inc. GST) and stock levels are on each product page.
Common questions
Straight answers from the ARC IP Networks team. Last reviewed October 2026.
Drive bays. The AS5402T has two bays and the AS5404T has four. Both share the Intel Celeron N5105, 4 GB DDR4 (up to 16 GB), four M.2 NVMe slots, dual 2.5GbE, three USB 3.2 Gen 2 ports and HDMI 2.0b. The AS5404T also has a 120 mm fan instead of 70 mm and is 60 mm wider.
Yes. ARC IP Networks lists the AS5402T as the Nimbustor 2 Gen2 and the AS5404T as the Nimbustor 4 Gen2. ASUSTOR's current product pages use the model numbers AS5402T and AS5404T.
ASUSTOR's lab measured 576 MB/s read and 566 MB/s write for the AS5404T in RAID 5, using SMB Multichannel across both 2.5GbE ports. The AS5402T reached the same figures in RAID 1.
Yes. Both have four tool-free M.2 2280 NVMe slots on PCIe 3.0 x1, which can hold a fast SSD volume or accelerate the hard-drive volume.
Both the AS5404T and AS5402T ship with 4 GB of DDR4 in one of two slots and take up to 16 GB (2 x 8 GB).
Yes. It has an Intel Celeron N5105 with 4K transcoding, HDMI 2.0b with 10-bit 4K hardware decoding, and four bays for a large RAID 5 library. Plex Media Server installs from ASUSTOR App Central.
ASUSTOR lists 36 TB raw for the AS5402T (2 x 18 TB) and 72 TB raw for the AS5404T (4 x 18 TB). With expansion units, the totals rise to 14 and 16 drives respectively.
Yes. ARC IP Networks sells the AS5402T with a Seagate IronWolf 4 TB or 10 TB or an Exos X24 12 TB drive, and the AS5404T with IronWolf 4, 8 or 10 TB or Exos X24 12 TB.
Choose the AS5404T for home studios, Plex and power users on 2.5GbE. Choose the Lockerstor 4 Gen2+ (AS6704T v2) for offices that need dual 5GbE and a PCIe slot for a 10GbE card.
ARC IP Networks is a trusted ASUSTOR supplier in Australia, with genuine AS5402T and AS5404T units, the full 3-year ASUSTOR warranty, Australia-wide delivery and trade pricing. Order online at arcip.com.au or call 1300 100 440.
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