ASUS NUC 15 PRO+ SLIM Intel U9-285H/ DDR5 32GB/ 1TB/ Win 11 Pro
PRODUCT DESCRIPTION
ASUS NUC 15 Pro+ Slim Intel Core Ultra 9 285H / 32GB / 1TB / Windows 11 Pro (RNUC15CRSU9084C3) - 3 Years Onsite Warranty
A Different Chassis, Not Just a Faster NUC 15 Pro
The ASUS NUC 15 Pro+ Slim RNUC15CRSU9084C3 is the flagship of the NUC 15 family, but it is not simply a Core Ultra 9 upgrade dropped into the standard NUC 15 Pro chassis. ASUS builds the Pro+ Slim on its own board and enclosure — 144 x 112 x 41.8 mm against the 117 x 112 x 54 mm Tall chassis (or 117 x 112 x 36.8 mm slim chassis) used by the rest of the NUC 15 Pro range. It is wider and deeper to accommodate the higher-power Core Ultra 9 platform, while still coming in thinner than the Tall chassis at just 41.8 mm. Treat it as a distinct product line rather than a spec bump within NUC 15 Pro.
Intel Core Ultra 9 285H — 16 Cores, Arc 140T Graphics, the Top of the Range
The Core Ultra 9 Processor 285H pairs 6 performance cores, 8 efficient cores and 2 low-power efficient cores for 16 cores and 16 threads, with a maximum turbo frequency of 5.4 GHz — the highest in the NUC 15 range — backed by 24 MB of Intel Smart Cache. Base power is 45 W with a maximum turbo power of 115 W, a higher sustained power envelope than the Core Ultra 7 255H used in the standard NUC 15 Pro. Graphics are handled by the same Intel Arc 140T GPU architecture with 8 Xe-cores as the Ultra 7 tier, running at a higher maximum dynamic frequency. The on-chip Intel AI Boost NPU is rated at 13 peak TOPS (INT8), with ASUS quoting a combined platform figure of up to 99 TOPS across CPU, GPU and NPU together — but Microsoft's Copilot+ PC certification is judged on the NPU alone, and 13 TOPS sits below the 40 TOPS threshold, the same position as the Ultra 7 255H and Ultra 5 225H configurations elsewhere in our catalogue.
32 GB DDR5 and a 1 TB NVMe SSD
This configuration ships with 32 GB of DDR5 memory fitted across the platform's two SO-DIMM slots, and a 1 TB M.2 NVMe PCIe 5.0 SSD as primary storage, with a second M.2 2242 slot present for expansion. That is enough headroom for virtual machines, larger datasets and multitasking-heavy workloads without an immediate upgrade, and puts this configuration ahead of every other NUC 15 Pro / Pro Tall SKU in our catalogue on both memory and CPU tier.
Dual Thunderbolt 4, Dual HDMI 2.1, 2.5GbE, Four 4K Displays
Two Thunderbolt 4 Type-C ports (DisplayPort 2.1 and USB4 capable) and two HDMI 2.1 ports support up to four simultaneous 4K displays. Wired networking is a 2.5 Gigabit Ethernet port, with Intel Wi-Fi 7 and Bluetooth 5.4 for wireless. A Kensington lock slot and VESA mounting bracket are included, matching the security and deployment options of the rest of the NUC 15 Pro family even though the chassis itself is different.
Supplied Locally, with GST Invoice and Singapore Onsite Warranty
SourceIT supplies the ASUS NUC 15 Pro+ Slim RNUC15CRSU9084C3 with a full GST invoice and local Singapore support. ASUS backs this system with a 3-year onsite warranty, so a qualifying hardware fault is resolved at your premises.
Looking for a lower-cost configuration in the standard NUC 15 Pro chassis instead? Our ASUS NUC 15 Pro and NUC 15 Pro Tall listings cover Core Ultra 5, Core Ultra 7, Core 3, Core 5 and Core 7 configurations at lower price points. Email sales@sourceit.com.sg and we will help you compare.
ASUS RNUC15CRSU9084C3 Datasheet — Technical Specifications
General
| ASUS Product Name | ASUS NUC 15 Pro+ Slim, Full System |
| SKU | RNUC15CRSU9084C3 |
| Internal Item Code | 90AS00J1-M00230 |
| Range | ASUS NUC 15 Pro+ Slim (Arrow Lake platform), Core Ultra 9 configuration |
| Form Factor | Ultra-compact desktop mini PC, Pro+ Slim chassis — distinct from the NUC 15 Pro / Pro Tall chassis |
| Manufacturer Warranty | 3-Year Onsite Warranty (ASUS) |
| Local Warranty (Singapore) | Included with every unit supplied by SourceIT, together with a GST invoice |
Processor & Graphics
| Processor | Intel Core Ultra 9 Processor 285H (Arrow Lake, base power 45 W, max turbo power 115 W) |
| Cores / Threads | 16 cores (6 Performance + 8 Efficient + 2 Low Power Efficient) / 16 threads |
| Max Turbo Frequency | 5.4 GHz |
| Cache | 24 MB Intel Smart Cache |
| Graphics | Intel Arc 140T GPU, 8 Xe-cores — hardware ray tracing, XeSS, AV1 encode/decode |
| Neural Processing Unit | Intel AI Boost, 13 peak TOPS (INT8); up to 99 TOPS platform figure combining CPU+GPU+NPU. Below the 40 TOPS Copilot+ PC threshold |
Memory & Storage
| Memory Installed | 32 GB DDR5 across 2 x SO-DIMM |
| Memory Slots / Maximum | 2 x SO-DIMM, tool-less access, up to 96 GB total per ASUS |
| Storage Installed | 1 TB M.2 NVMe PCIe 5.0 SSD (primary slot) |
| Storage Expansion | Second M.2 2242 PCIe 4.0 slot present for expansion |
Connectivity & Display
| Wireless LAN | Intel Wi-Fi 7, Bluetooth 5.4 |
| Wired LAN | 1 x 2.5 Gigabit Ethernet (RJ45) |
| Display Outputs | 2 x Thunderbolt 4 Type-C (DisplayPort 2.1 and USB4 capable), 2 x HDMI 2.1 |
| Display Support | Up to four simultaneous 4K displays |
| USB | USB 3.2 Gen 2 Type-A and Type-C ports, plus USB 2.0 Type-A |
Physical & Security
| Chassis | Pro+ Slim chassis, 144 x 112 x 41.8 mm — a distinct, thinner-profile board and enclosure from the NUC 15 Pro / Pro Tall family |
| Weight | Approximately 0.68 kg |
| Mounting | VESA mount bracket supplied |
| Security | Intel Platform Trust Technology, Kensington lock slot |
| Operating System | Windows 11 Pro, pre-installed |
Connectivity & Setup / Expansion
A Distinct Chassis, Not a Configuration of the Standard NUC 15 Pro
At 144 x 112 x 41.8 mm, the Pro+ Slim chassis has a larger footprint than either the Tall (117 x 112 x 54 mm) or slim (117 x 112 x 36.8 mm) chassis used by the rest of the NUC 15 Pro range, while sitting between them on height. The extra footprint gives ASUS room for the Core Ultra 9's higher sustained power envelope and the board layout that supports it. Do not expect Tall-chassis expansion accessories (second M.2 2280 SSD module, second 2.5GbE LAN module) to be compatible — those are built for the NUC 15 Pro Tall enclosure specifically, and ASUS's specification pages for the Pro+ Slim line do not list them.
Memory and Storage
32 GB of DDR5 is fitted across both SO-DIMM slots from the factory. The primary M.2 slot takes up to an 8 TB PCIe 5.0 NVMe drive per the platform specification, with 1 TB fitted here; a second, smaller M.2 2242 slot is present for a further PCIe 4.0 drive if needed.
Display and Networking Setup
Two Thunderbolt 4 Type-C ports carrying DisplayPort 2.1 and USB4, plus two HDMI 2.1 outputs, support up to four 4K displays between them. Wired networking is a single 2.5 Gigabit port; if a resilient second wired connection is required for a firewall or gateway role, this chassis has the one port and we can advise on an alternative.
Copilot+ and On-Device AI
The 13 TOPS NPU gives real hardware acceleration for background AI features and local inference, but it does not meet Microsoft's 40 TOPS Copilot+ PC threshold, despite ASUS's headline "up to 99 TOPS" platform figure combining CPU, GPU and NPU contributions. Cloud-based Copilot works normally regardless; on-device Copilot+ experiences such as Recall do not run on this NPU.
Package Contents & Ordering Information
In the Box
ASUS NUC 15 Pro+ Slim system, AC power adapter and power cord, VESA mounting bracket, screw pack, user manual and warranty card. Keyboard, mouse and monitor are not included and are ordered separately.
ASUS NUC 15 Family — Related SKUs for Comparison
SourceIT carries the ASUS NUC 15 Pro+ Slim alongside the standard NUC 15 Pro and NUC 15 Pro Tall ranges. These are different chassis families under the same NUC 15 generation and are referenced here by SKU for comparison only — email sales@sourceit.com.sg quoting the SKU to check stock and lead time.
| RNUC15CRSU9084C3 (this listing) | NUC 15 Pro+ Slim — Core Ultra 9 285H, 32GB DDR5, 1TB SSD |
| RNUC15CRHU7079C3 / RNUC15CRHU7074C3 | NUC 15 Pro (standard chassis) — Core Ultra 7 255H, 16GB DDR5, 1TB SSD |
| RNUC15CRHC7073C3 | NUC 15 Pro Tall — Core 7 240H, 16GB DDR5, 512GB SSD |
| RNUC15CRHC5073C3 | NUC 15 Pro Tall — Core 5 210H, 16GB DDR5, 512GB SSD |
| RNUC15CRHI3073C3 | NUC 15 Pro Tall — Core 3 100U, 16GB DDR5, 512GB SSD |
For a barebone Pro+ Slim kit with no memory, storage or OS fitted, for system integrators fitting their own components, please see the rest of our ASUS NUC 15 catalogue or ask us directly.
Datasheet & Downloads
ASUS hosts the official product and specification pages for this model family. The links below are ASUS's current Singapore product and specification pages.
| ASUS Singapore product page | ASUS NUC 15 Pro+ — Overview |
| ASUS Singapore specifications page | ASUS NUC 15 Pro+ — Full Specifications |
For the PDF datasheet, user manual or driver downloads, email sales@sourceit.com.sg quoting RNUC15CRSU9084C3 and we will send you the current files directly.
Frequently Asked Questions — ASUS NUC 15 Pro+ Slim RNUC15CRSU9084C3
Is this the same chassis as the NUC 15 Pro or NUC 15 Pro Tall?
No. The Pro+ Slim uses its own 144 x 112 x 41.8 mm chassis, wider than the 117 x 112 mm footprint shared by the standard NUC 15 Pro and NUC 15 Pro Tall, though it is thinner than the Tall chassis at 41.8 mm versus 54 mm. Treat it as a separate product line rather than a variant of the NUC 15 Pro.
Is this a complete system or a barebone unit?
Complete system. It ships with the Intel Core Ultra 9 285H processor, 32 GB DDR5 memory and a 1 TB NVMe SSD already fitted, with Windows 11 Pro pre-installed and ready for first sign-in.
Is this a Copilot+ PC?
No. The NPU is rated at 13 peak TOPS against Microsoft's 40 TOPS requirement for Copilot+ PC certification. ASUS's quoted 99 TOPS is a combined CPU+GPU+NPU platform figure, not the NPU figure that certification is judged on.
How does the Core Ultra 9 285H compare with the Core Ultra 7 255H in your standard NUC 15 Pro?
Same core and thread count (16/16) and the same Arc 140T GPU architecture, but the Ultra 9 285H reaches a higher 5.4 GHz turbo against 5.1 GHz, and runs at a higher 45 W base power against 28 W. The NPU is identical at 13 TOPS on both.
How many monitors can it drive?
Up to four 4K displays, across two Thunderbolt 4 ports with DisplayPort 2.1 and USB4, plus two HDMI 2.1 outputs.
Can I use the Tall-chassis expansion accessories (second M.2 SSD, second LAN module) with this unit?
No. Those expansion accessories are built for the NUC 15 Pro Tall enclosure specifically. ASUS's Pro+ Slim specification pages do not list them as compatible with this chassis.
Can I upgrade the storage further?
A second, smaller M.2 2242 slot is present alongside the primary M.2 2280 slot. Ask SourceIT to supply and fit an additional drive before delivery if you would rather not open the chassis.
Does it come with a Singapore warranty and a GST invoice?
Yes. Every ASUS NUC 15 Pro+ Slim RNUC15CRSU9084C3 sold by SourceIT comes with local Singapore support and a GST invoice; ASUS backs this system with a 3-year onsite warranty.
