Two Quotes for the Same Server Can Differ by Two Years of Warranty

Written and maintained by Haink's infrastructure team · Machine types and model formats verified against Lenovo Press product guides, 29 August 2026 · authorized-channel, MTM and serial verified before payment

Three quotes arrive, all headed "ThinkSystem SR650 V4", all apparently the same configuration. One is meaningfully cheaper. The specification comparison finds nothing, so the cheap one wins.

Then look at the machine type. On the SR650 V4, 7DGC and 7DGD are the same server with different base warranty terms — one year against three. That difference is not in the specification table, it is not in the model name, and on a forty-node order it is the entire price gap and then some.

The machine-type-model is the only field on a Lenovo quote that cannot be paraphrased. This page explains how to read it.

The ten characters

A complete Lenovo model number is ten characters: a four-character machine type followed by a six-character model.

Two things follow immediately. A CTO in the model position means the machine was built to order from feature codes. Anything else is a fixed, preconfigured model with a defined processor, memory and drive layout — and often a regional suffix, AP for Asia Pacific in the example above.

What the machine type actually encodes

This is the part that surprises people: the machine type is not just "which server". On the current generation it also carries the base warranty term, the cooling variant and, where one exists, the workload certification.

The practical consequences are three:

1. A price comparison that ignores the machine type is not a comparison. Two years of base warranty across a fleet is a large number, and it is the easiest thing in the world to quote away without saying so.
2. A liquid-cooled machine is a different machine type, not an option on the same one. If your specification calls for Neptune Core and the quote carries the general-purpose machine type, the quote does not match the specification — and on the SR650 V4 that variant also halves the DIMM slots from 32 to 16, which changes the memory configuration underneath it.
3. Certified configurations are their own machine type. If the workload requires a certification, the machine type is where it lives. A general-purpose machine type does not become certified by having the same components.
4. But the machine type does not separate everything. The SR650a V4 — the accelerator-dense variant — is documented under the same machine types as the SR650 V4. Where a variant matters, the feature-code list below is the authority, not the machine type alone. The naming scheme behind those variants is covered in model numbers decoded.

Feature codes: why two "identical" CTO builds are not identical

On a configure-to-order machine, the actual configuration is carried by four-character feature codes rather than by the model number. From the SR650 V4 guide: C3QL selects the twelve-bay 3.5-inch chassis, BPDR the standard 2U heatsink, C3JB the general-computing power-efficiency operating mode. Some feature codes carry real recurring value rather than a component — SCY0 adds the XClarity Controller Premier licence, without which the machine has no remote console or virtual media (what that tier includes).

So a CTO quote is a machine type plus a list of feature codes, and that list is the specification. Two quotes reading "SR650 V4, 2× processor, 512 GB, 8× NVMe" can carry different chassis, different heatsinks, different power profiles and different network adapters — all invisible in the prose description, all visible in the codes.

Ask for the feature-code list on every CTO quote. It is the only version of the configuration that is not a paraphrase, and any supplier who cannot produce it on request is quoting something they have not configured.

Where to find the numbers on hardware you already own

• The pull-out label on the front of the chassis carries the machine type and serial.
• The XClarity Controller inventory reports both, which means you can collect them without a data-hall visit.
• Lenovo XClarity Essentials OneCLI retrieves them from the operating system, which is how you export a whole estate rather than reading labels one at a time.
• XClarity Administrator, where deployed, holds the inventory for the managed estate and can export it directly.

Collect machine type and serial together. The machine type tells you what the platform is; the serial is what ties a specific unit to warranty and support entitlement, and to the lifecycle dates that decide your refresh sequence.

Verify before payment, not after delivery

The MTM and serial are also the mechanism for confirming that hardware is what it is claimed to be. Ask for both before payment, and confirm on Lenovo's support site that the unit is genuine, in warranty for your region and entitled to support.

Two failure modes this catches, both common enough to design around:

• Previously registered hardware. The warranty clock started with someone else. The serial reveals it; the invoice does not.
• Regional mismatch. A model built and warranted for one geography, sold into another. The regional suffix in the model number is the first signal; the entitlement check is the confirmation. This matters most in exactly the markets where support entitlement is thinnest to begin with.

Both are covered in more depth in gray-market channel risks and how to verify an in-stock offer. The short version: an offer that cannot produce machine type and serial before payment is not an offer you can check.

What to require in a tender

Six lines, and most of the problems above disappear:

1. Full ten-character model number for every line item, not a product name.
2. Base warranty term stated separately, plus the cost of extending it to the term you actually want — and see what the support tiers above it actually promise before choosing one.
3. Complete feature-code list for any configure-to-order build.
4. Cooling variant named explicitly, with its machine type, and the DIMM slot count that results.
5. Machine type and serial supplied before payment for stock units, for entitlement verification.
6. Regional warranty confirmation for the installation country, not the country of purchase.

For orders at project scale these belong in the requirement rather than in clarifications — the sequence for that is in buying twenty to sixty servers as one project.

Frequently asked questions

What is a Lenovo MTM?

The machine-type-model: a ten-character identifier made of a four-character machine type and a six-character model. It is the only unambiguous description of what a quote is offering, because product names like "SR650 V4" cover several machine types with different warranty terms, cooling variants and certifications.

Why do two quotes for the same server have different machine types?

Because the machine type encodes more than the platform. On the SR650 V4, 7DGC and 7DGD are the same server with one-year and three-year base warranty respectively; 7DK2 is the Neptune Core liquid-cooled variant and 7DLN the SAP HANA configuration. Comparing prices without comparing machine types compares different products.

What does CTO mean in a model number?

Configure-to-order. A model position containing CTO — as in 7DGDCTO1WW — means the machine is built to order and the real configuration lives in the feature codes rather than in the model number. Anything else is a fixed preconfigured model with a defined component list and often a regional suffix.

What are feature codes and why do they matter?

Four-character codes that select individual components and settings on a configure-to-order build — chassis type, heatsink, operating mode, adapters. Two CTO quotes described identically in prose can carry different feature codes and therefore different hardware. Always ask for the full list.

Where do I find the machine type and serial on a server I already have?

On the pull-out label at the front of the chassis, in the XClarity Controller inventory, through XClarity Essentials OneCLI from the operating system, or exported in bulk from XClarity Administrator where it is deployed. For a fleet audit, use the last two — reading labels does not scale.

Why should we get the serial before paying?

Because it is the only way to confirm the unit is genuine, still in warranty and entitled to support in your region before the money moves. It catches previously registered hardware, where the warranty clock started with someone else, and regional mismatches where a machine warranted for one geography is being sold into another.

Does the machine type tell us the warranty length?

On current ThinkSystem platforms it frequently does — Lenovo Press documents separate machine types for one-year and three-year base warranty on both the SR630 V4 and SR650 V4. Treat it as something to verify per platform in the product guide rather than as a universal rule, and always have the warranty term stated separately on the quote.

Related

• How to choose Lenovo ThinkSystem servers — workload-to-model selection and host sizing
• Lifecycle and end of support — the machine type is what you look the dates up with
• ThinkSystem V3 vs V4 — why the version number is not an age
• SR630 V4 vs SR650 V4 — the chassis whose machine types these are
• Model numbers decoded — what the name tells you before you reach the machine type
• Four-socket and scale-up — where a certified machine type is the requirement, not an option
• HPE part numbers decoded — the equivalent scheme on the other platform, for mixed estates
• Warranty and Premier Support — what the term in the machine type actually buys you
• Gray-market channel risks · verifying an in-stock offer
• Buying 20–60 servers as one project — where these checks belong in a tender
• Lenovo stock, lead times and pricing · stock vs BTO/CTO

Sources

• Lenovo Press — ThinkSystem SR650 V4 product guide (machine types 7DGC, 7DGD, 7DK2, 7DLN; model formats 7DGDCTO1WW, 7DGCCTOLWW, 7DGDA00RAP; feature codes C3QL, BPDR, C3JB)
• Lenovo Press — ThinkSystem SR630 V4 product guide (machine types 7DG8, 7DG9, 7DK1)
• Lenovo Support — finding serial number and machine type from the product label
• Lenovo Support — finding machine type and serial with XClarity Essentials OneCLI
• Lenovo — end-of-service date lookup (what you use the machine type for)