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MCS · Rigs · Compare

Side-by-side, with the numbers that matter.

Two rigs, one table. Higher numbers win in cobalt; TDP and price flip.

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SpecOpenAI GPT-5NVIDIA DGX Spark
Codex Synergy Precision Bonus12—
CPU Breakdown—10x Arm Cortex-X925 + 10x Arm Cortex-A725
CPU Cores Total—20
Dimensions MM—150 x 150 x 50.5
Ethernet—1x 10 GbE RJ-45
FP4 Pflops Sparse—1
Gb10 TDP Watts—140
Gpt5 Context Window Tokens K400—
Gpt5 Input PER 1M USD1.25—
Gpt5 Output PER 1M USD10—
Gpt5 Snapshotgpt-5-2025-08-07—
Gpt6 Astra Launch2026-09-03—
GPU Arch—Blackwell, 5th-gen Tensor Cores, 4th-gen RT Cores
Launch Price USD—3,999
Memory bandwidth (GB/s)—273
Memory Interface BIT—256
Memory type—LPDDR5X
MSRP (USD)↓ better—4,699
NIC—ConnectX-7 @ 200 Gbps
Price Change Effective—2026-02-23
PSU Watts—240
Storage—4TB NVMe M.2 self-encrypting
Superchip—NVIDIA GB10 Grace Blackwell
Unified Memory GB—128
Version Major5—
Weight KG—1.2
Wireless—Wi-Fi 7, Bluetooth 5.4