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MemTest86+ for GPUs — bootable VRAM diagnostics

AI-discovered

Problem

With the massive second-hand GPU market (mining-era cards, eBay flips), buyers and repair shops have no reliable, purpose-built tool to test GPU memory. Enthusiasts cobble together stress tests like gpu-burn or dig through repair.wiki guides, but there is no bootable, pass/fail diagnostic equivalent to MemTest86+ for VRAM. The HN thread got replies pointing to scattered community guides, confirming the gap.

Opportunity

A bootable VRAM diagnostic tool (USB image or PXE) with per-block error maps, thermal correlation and a printable pass/fail report — the 'MemTest86 for GPUs'. Sell Pro tier to repair shops and resellers who need certified test reports for used-card listings.

Market analysis

A real, unserved gap with a nameable reference product (MemTest86) and a paying B2B angle in repair shops and used-GPU resellers. The catch: several free tools already cover parts of the job, and the proprietary NVIDIA MATS/MODS ecosystem plus one curated paid USB image show both that demand exists and that cross-vendor coverage is the hard part.

Market · GPU repair technicians, used-hardware resellers and cautious eBay buyers; durable demand driven by the large second-hand GPU market and AI-era card churn.

Pricing · Free core for trust and distribution, Pro tier for shops; a comparable curated bootable VRAM test USB already sells as a digital download, validating direct willingness to pay.

score 6/10 by glm-5.1

Pros

  • + Clear gap confirmed by the thread itself: no polished cross-vendor bootable VRAM diagnostic exists.
  • + Repair shops and resellers are identifiable B2B buyers who test in volume and can be reached through repair communities.
  • + A printable pass/fail report maps directly to the real job-to-be-done: certified used-card listings.
  • + Open-source building blocks exist (memtest_vulkan, gpu-vram-diagnostics) proving the approach works.

Cons

  • − Free alternatives (memtest_vulkan, gpu-burn, vendor tools) are good enough for many users, capping the free-to-paid funnel.
  • − Vendor lockout: NVIDIA's own MATS/MODS tooling is proprietary and hard to obtain, fragmenting the landscape.
  • − Maintaining coverage across GPU generations and vendors is ongoing, thankless work with each new memory type.
  • − Niche ceiling: a small professional audience, however loyal.

Source

Hacker News (Ask HN)

Open original thread ↗

The interesting asymmetry is that the free tools that “kill” this idea are exactly what makes it viable: memtest_vulkan is a bare command-line stress test with no report, no per-block maps and no thermal correlation, which is fine for an overclocker and useless for a shop that needs to hand a customer a document. The Pro product is therefore not a better memory test but the certification layer around it — error maps, test-run provenance, a QR-verifiable report a reseller can paste into an eBay listing to justify a higher price. That framing also solves distribution: sell it where repair techs already hang out and let the report itself advertise the tool on every listing it certifies. The moat is modest but the maintenance burden is real, so scope discipline matters — launch NVIDIA-plus-AMD only, and treat every new memory generation as a paid update rather than free treadmill.