SPM

Engineering

What is established, and how far.

SPM Thor is a concept in development. Every figure for it carries a tag saying how far it is established, so a model result is never read as a measurement.

Status by area

The tags below say how far each statement is established.

  • Verified in model
  • Design intent
  • Estimate
  • Concept
  • Verified in model

    Verified in the model

    • Every part fits: no interferences with eight GPUs installed
    • Blade, shell, rear-panel, core and GPU-deck service paths are clear
    • The 235 × 309 × 306.5 mm, 22.3-litre envelope
  • Estimate

    Estimates

    • About 300 W per GPU and about 3 kW at full load
    • Coolant temperatures and flow
    • A 200–240 V / 16 A circuit at eight GPUs; server-class noise
  • Concept

    Concept

    • The GPU blade, its memory — 48 GB as modelled, 96 GB as a clamshell variant — and the backplane
    • The system board and its SP5-class processor
    • GPUs linked over PCIe Gen5, with no dedicated GPU-to-GPU link
  • Not yet

    Not yet

    • Measured performance: nothing is benchmarked
    • The radiator-cassette and power-module slide-outs
    • A price or an availability date
The full specification — every figure tagged

Enclosure

Envelope
235 W × 309 D × 306.5 H mm (313.5 mm on its feet)Verified in model
Volume
22.3 litresVerified in model
Construction
Outer enclosure carrying no hardware; every component on a slide-out coreDesign intent
Finish
Black anodised aluminium shell and fascia; powder-coated steel coreDesign intent

GPU system

GPU positions
8 vertical blades on a 15 mm pitchVerified in model
Populations
2, 4, 6 or 8 GPUs on one platform; empty slots carry keyed blanking coversDesign intent
GPU blade
Custom bare-board blade for an RTX PRO-class GPU on a nickel micro-channel cold plate — not a retail cardConcept
Power per GPU
About 300 W — the radiator's limit per bladeEstimate
GPU memory
16 GDDR7 packages on a 512-bit bus: 48 GB with 3 GB packages as modelled; a 96 GB clamshell variant fits the envelopeConcept
Interconnect
PCIe Gen5 ×16 per blade through backplane retimers and a riser spine to the CPU; no separate GPU-to-GPU linkConcept

Compute and I/O

Processor
SP5-class server socketConcept
System memory
12 × DDR5 RDIMM, one per channelConcept
Storage
4 × M.2 NVMe under a shared heatsinkConcept
Networking
2 × QSFP112, 2 × 10G and a management RJ45Concept
Other I/O
USB-C, USB-A, mini-DP; baseboard management controllerConcept

Cooling

Loop
One loop: pump and reservoir, radiator, supply and return manifolds, self-sealing blind-mate couplings to every bladeDesign intent
Radiator
286 × 288 × 45 mm crossflow core with 4 × 140 mm fans, behind louvres with no line of sight to the fansDesign intent
Coolant
About 44 °C supply and 52 °C return at 25 °C ambient, 5 L/minEstimate
Leak handling
Drip tray with a leak-sense strip under the manifoldsDesign intent
Acoustics
Server-class at full loadEstimate

Power

Supplies
2 × 3.2 kW CRPS-format 54 V modules, 1+1, hot-swappable from the rearDesign intent
Distribution
Power distribution board and laminated copper busbars — no per-GPU cablesDesign intent
System load
About 3.0 kW DC with eight blades at about 300 WEstimate
Mains
A 200–240 V / 16 A circuit for the 8-GPU configurationEstimate

Service

Top shell
Press the flush handle, slide 10 mm back, lift offVerified in model
GPU blades
Raise the lever 75° and lift straight out — no tools, no coolant handlingVerified in model
Core
Rear panel off unlocks the core, which rolls out about 330 mm on roller carriagesVerified in model
Compute access
The GPU deck lifts 145 mm as one sub-assemblyVerified in model
Checks
No interferences assembled; blade, shell, rear-panel, core and deck paths and every mechanism arc clear. Radiator-cassette and power-module slide-outs are not yet verifiedVerified in model

Before you enquire

Can I buy one now?

Not yet. SPM Thor is in development and we're taking enquiries. There's no list price or availability date — an enquiry starts an engineering conversation about your workload and, as engineering progresses, a quote.

Which GPUs does it use?

Thor is designed around RTX PRO-class GPUs on custom liquid-cooled blades, each budgeted at about 300 W. The final GPU and blade are confirmed as engineering progresses, and any quote will say exactly what you get.

Where does it go, and how loud is it?

At six or eight GPUs it is estimated to draw about 2.4–3 kW and to be server-loud at full load, so it belongs in a comms or server room; eight GPUs are estimated to need a 200–240 V / 16 A circuit. We check your site before anything is quoted.

Why are there no performance figures?

Because nothing has been measured. Every number about models on this site is a memory estimate, labelled as one. Throughput will be published when it's measured on hardware.

NVIDIA, RTX and RTX PRO are trademarks of NVIDIA Corporation. SPM Thor is designed by SPM, a Sarja Technologies product brand, in partnership with Sarja AI.

See the machine itself on the SPM Thor page.