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Voltarum Local LLM Hardware Guide

NVIDIA · NVIDIA GPUs · 2025

NVIDIA RTX PRO 5000 Blackwell

For advanced users

48 GB in a 300 W blower card: 70B dense models on one quiet-ish GPU.

Memory
48 GB
Bandwidth
1.34 TB/s
Power
300 W
Largest popular model at 4-bit
Qwen3.6 35B A3B

from $4,500 (typical price)

Researched from manufacturer data and public sources; not tested by us.· Last reviewed Oct 11, 2026

What it can run

Estimate

Popular models at Q4_K_M with a 32K-token context. Memory needed from real model files; speed is the theoretical ceiling.

Change model size or context

Model weightsContext cache (KV)RuntimeUsable limit (colour = verdict)

ModelVerdictMemorySpeed ceiling
Qwen3 1.7BRuns
6.4 GB / 48 GB · with 48 GB
≤ 1,211 tok/s
Qwen3.5 9BRuns
8.3 GB / 48 GB · with 48 GB
≤ 237 tok/s
Gemma 4 12BRuns
9.5 GB / 48 GB · with 48 GB
≤ 189 tok/s
gpt-oss-20bRuns
14 GB / 48 GB · with 48 GB
≤ 671 tok/s
Qwen3.6 27BRuns
20 GB / 48 GB · with 48 GB
≤ 80 tok/s
Qwen3.6 35B A3BRuns
24 GB / 48 GB · with 48 GB
≤ 729 tok/s
Llama 3.3 70BNot enough memory
55 GB / 48 GB · with 48 GB
—
gpt-oss-120bPartly in system RAM
65 GB / 48 GB · with 48 GB
—
Qwen3.5 122B A10BPartly in system RAM
79 GB / 48 GB · with 48 GB
—
Qwen3.5 397B A17BPartly in system RAM
247 GB / 48 GB · with 48 GB
—

Theoretical maximum for generating text: memory bandwidth divided by the bytes read per token. Real runs usually reach about half to three quarters of it.

Where to buy

Prices are editorial references (launch price and a typical street price on the date shown), not live prices. In 2026 the memory shortage has pushed many prices well above launch.

Prices are shown only if updated in the last 24 hours and may change; the retailer’s price at checkout applies. We may earn a commission from these links at no cost to you. Affiliate disclosure

Overview

Editorial opinion

Best for: Workstations and servers that need 48 GB without two consumer cards.

Editorial opinionWould we buy it today?

Good for a compact 48 GB server; two used RTX 3090s are cheaper if you have the room.

Pros and cons

Editorial opinion

Pros

  • 48 GB on one card
  • 300 W, blower cooler that stacks well

Cons

  • Expensive per GB compared with used RTX 3090s
  • Blower fans are loud under load

Specifications

Factual data
Manufacturer
NVIDIA
Chip
GB202
Architecture
Blackwell
Type
Graphics card
Form factor
PCIe card
Released
2025
Availability
On sale
Memory options
48 GB
Memory type
GDDR7 ECC
Memory bus
384-bit
Memory bandwidth
1.34 TB/s
Usable for models (default)
48 GB / 48 GB
Board / max power
300 W
Interface
PCIe 5.0 x16
Slots
2
Power connector
16-pin 12V-2x6
Compute stack
CUDA
Models
Any model that fits
Several units for one model
Yes

Source: Manufacturer specifications

Software support

Editorial opinion

How well the popular local-AI tools run on it today (editorial assessment).

  • llama.cppExcellent
  • OllamaExcellent
  • LM StudioExcellent
  • vLLMExcellent
  • MLXNot supported

Measured speeds

Factual data

Measured results with their source. We never invent speeds.

No measured results yet. The table above shows the theoretical ceiling instead.

Alternatives

Apple silicon

Apple Mac mini (M5 Pro)

Memory
64 GB
Bandwidth
307 GB/s

Largest popular model at 4-bit: Qwen3.6 35B A3B

Up to 64 GB at 307 GB/s in a quiet mini PC: 27–35B models at a comfortable pace.

from $1,699 (launch price)Recommended

Apple silicon

Apple Mac Studio (M5 Ultra)

Memory
512 GB
Bandwidth
1.2 TB/s

Largest popular model at 4-bit: Qwen3.5 397B A17B

Up to 512 GB at 1.2 TB/s: the only single box that holds DeepSeek R1 or Qwen3.5 397B at 4-bit.

from $5,499 (launch price)Recommended

DGX Spark / GB10

NVIDIA GB10 Grace Blackwell (DGX Spark and partners)

Memory
128 GB
Bandwidth
273 GB/s

Largest popular model at 4-bit: Qwen3.5 122B A10B

128 GB with CUDA in a tiny box: the NVIDIA answer to Strix Halo and the Mac.

from $5,000 (typical price)Recommended