eRacks Systems Tech Blog
Open Source Experts Since 1999
Refurbished, Renewed, and Burned In: What We Do to a Used GPU Before It Ships
This week a customer’s IT team asked us for “more details on your refurb process”. One of them had already asked an AI assistant, which summarized our process from our own website: a 72-hour burn-in, fans checked, thermal pads refreshed. It got most of it right. Here is the full answer, from us.
Why refurbished at all
Our new systems ship with new parts, bought through authorized US distribution and validated-new sources, and that stays the default. Some customers ask for something else on purpose. The AMD Threadripper 3000 series is a good platform that distributors no longer carry. The GeForce RTX 3090 is the last GeForce card with NVLink (NVIDIA’s bridge that links two cards’ memory), which matters for some training work, and a pair of them costs a fraction of a current professional card. For builds like these the parts can only come refurbished or renewed, and we are glad to build them.
The words cover a lot of ground, though. “Refurbished” can mean a part that was properly reworked, or a used part that was wiped down and relisted. Our components page describes the other end of that market: “clean pull” lots with a short broker warranty, and server CPUs locked to their first owner’s firmware. We don’t buy from that market. Our refurbished cards come from refurbishers who back them with a warranty, and then every refurbished part goes through our own process.
What we do to a refurbished part
- Inspection. Every part is checked when it arrives, and anything that doesn’t meet our standards goes back. Not every “refurbished” or “renewed” part passes; we have rejected and returned some.
- Rework on the cards. We check the fans and replace them as needed, and we always replace the thermal compound or pads (the material that carries heat from the chip to the cooler). Worn connectors, plugs or jacks get replaced, and visibly marginal solder joints get resoldered. Then the card is cleaned and reassembled.
- Assembly. Everything is double- and triple-checked, neat, clean and properly cabled, and every card has to be recognized by its driver before we go further.
- Operating system and test suite. The OS and drivers go on, with our own utilities and our testing and burn-in suite.
- Burn-in. 72 hours of testing under full load, CPU, memory and every GPU together, including overnight runs and several multi-hour burn-ins, with temperatures logged and the driver logs watched for errors. If a part fails, we replace it and restart the burn-in from zero.
- The AI stack. On an AI server the stack goes on last, and the system is benchmarked with real models and tested before it ships.
The 72 hours are the same burn-in every eRacks system gets. The 24-hour minimum on our components page is typically for rush orders.
What it means for you
When a quote includes a refurbished or renewed part, it says so, line by line. Refurbished GPUs carry a 1-year warranty. And the system they go into gets the same assembly, the same checks and the same 72-hour burn-in as a system built entirely from new parts.
Looking at a previous-generation build, a pair of NVLinked cards, or an AI server on a budget? Browse our AI rackmount servers, or write to us at info@eracks.com and tell us what you need.
joe October 29th, 2026
Posted In: News, Technology
Tags: AI server, burn-in, eRacks, refurbished GPU, renewed hardware, RTX 3090, Threadripper
The Gray Market Got Smarter. Our Answer Hasn’t Changed: New Parts Only.
In 2015 we published a page called Components We Use, prompted by the broker emails that arrive in our inbox four or five times a week: “clean pull” hard drives by the pallet, bank wire only, 90-day warranty if you’re lucky. The message of that page was one sentence: every new eRacks system is built from 100% new, factory-fresh components, full stop.
A decade later the emails still come, but the merchandise has evolved. This week’s version offered current-generation AMD EPYC server processors, “brand new”, at 50 to 70 percent below any plausible new-part price. So we rewrote the page for 2026, and the new material is worth a blog post of its own, because knowing this trick can save you real money and real pain.
The vendor-locked CPU trick
Modern AMD EPYC processors include a security feature called Platform Secure Boot (PSB for short). When a large vendor like Dell, or a cloud data center, first powers a chip in one of their servers, PSB burns one-time fuses inside the processor that bind it permanently to that vendor’s firmware. That chip will now boot only on that vendor’s motherboards. Forever. There is no unlock.
When those servers are decommissioned, the pulled CPUs flow into the gray market, where brokers list them as “brand new” at half price. Buy one for a custom build and you own a very expensive paperweight: it will never POST (pass the power-on self-test) on a Supermicro, ASUS, or any other standard board. The discount is the tell. A price that looks impossible through authorized distribution usually is.
What we do instead
The refreshed page spells out our sourcing practice in full, and it is the same one we have followed since 1999:
- Authorized US distribution only, so every manufacturer warranty passes through to you intact.
- Multi-source price and availability verification before we quote or set a default. When a part goes supply-constrained, as several high-capacity drives have in the current shortage, we mark it subject to availability or move it to quote-only instead of pretending it ships tomorrow.
- Quality brands, qualified by us: Supermicro and ASUS boards, Intel Xeon and AMD EPYC/Ryzen/Threadripper processors, Seagate, WD, and Toshiba drives (CMR only in our NAS lines), Samsung enterprise SSDs, Intel Arc and NVIDIA GPUs, Broadcom/LSI controllers.
- 72-hour burn-in under full load on every system before it ships. A component that fails burn-in gets replaced, and the clock starts over.
None of this is new policy. What is new is the page saying it plainly for 2026, with the vendor-lock mechanics explained, so that when one of those emails lands in YOUR inbox, you know exactly what is being sold.
Read the full page, including the vintage 2015 broker email we preserved for posterity: eracks.com/components-we-use
CPU photographs by smial via Wikimedia Commons, Free Art License.
joe July 6th, 2026
Posted In: Behind the Scenes, News
Tags: AMD PSB, burn-in, components, gray market, hardware, sourcing, transparency, vendor-locked CPU, warranty