I priced a DIY local-AI PC against 3 prebuilt AI boxes — the GPU price spike changed the winner

Building around a single GPU used to be the obvious move. With cards jumping 39% in two months, the math on prebuilt AI appliances just got a lot…

Aliteq
Nadia Rahman · Deals Editor

The short version

A DIY build around an RTX 5070 (12GB) now runs roughly $1,700–1,900 all-in, after the card's 36% price jump to $899.99 median

The short version

Nvidia's DGX Spark is a flat $4,699 for 128GB of unified memory — 10x the VRAM of that DIY build, but far less bandwidth

The short version

The GMKtec EVO-X2, built on AMD's Ryzen AI Max+ 395, undercuts everyone at roughly $1,499 for the same 128GB unified memory

The short version

AMD's own Ryzen AI Halo Developer Platform sits in between at $3,999

The short version

Unified-memory boxes trade raw speed for capacity — DGX Spark's own bandwidth is 273GB/s, a fraction of a discrete GPU's dedicated memory

The honest recommendation

For most people reading this in August 2026, the GPU price spike makes the unified-memory boxes look better than they did in June — not because they got cheaper, but because the DIY alternative got…

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I priced a DIY local-AI PC against 3 prebuilt AI boxes — the GPU price spike changed the winner

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