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Lenovo · ThinkSystem first-generation AMD (single-socket EPYC 7002 / 7003)

Lenovo ThinkSystem SR635 end of life

Lenovo has published an End of Service date of 30 June 2033 for the ThinkSystem SR635's base models, CTO1WW and CTOLWW on machine types 7Y98 and 7Y99, in EMEA. Lenovo's LP1160 change log records this 1U single-socket AMD EPYC server's withdrawal from marketing on 12 March 2025, so Lenovo no longer sells it new, but Lenovo support for those base models is available until that date, subject to each unit's warranty or contract. Preconfigured model codes need checking separately: one tested, 7Y99A00HEA, returned no date.

ThinkSystem SR635 support dates

Every row names its basis. A third-party tracker date is not the vendor’s own, and “not published” means exactly that.
MilestoneDateBasisSource
Preconfigured EPYC 7002 models withdrawn in EMEA22 June 2022Vendor-publishedLP1160 change log, June 22, 2022 update: 'Preconfigured models with EPYC 7002 processors for the EMEA market have now been withdrawn - Models section'.Lenovo ThinkSystem SR635 Server Product Guide (withdrawn product), LP1160
Withdrawn from marketing12 March 2025Vendor-publishedLP1160 change log, March 12, 2025 update: 'The SR635 is withdrawn from marketing.' No separate withdrawal letter was found.Lenovo ThinkSystem SR635 Server Product Guide (withdrawn product), LP1160
End of Service (EOS), EMEA (base models 7Y98/7Y99 CTO1WW and CTOLWW)30 June 2033Vendor-publishedQueried 2026-10-08. The API returned 2033-06-30 for 7Y98 and 7Y99, models CTO1WW and CTOLWW, in EMEA, and the same date for 7Y99 CTO1WW in NA, AP and LA. Only the CTO1WW and CTOLWW model codes are listed. A preconfigured EMEA model (7Y99A00HEA) returned no date.Lenovo End of Service Date Lookup (HT504708), end-of-service API, 7Y99 CTO1WW, EMEA

Where the ThinkSystem SR635 stands today

The 30 June 2033 date comes from Lenovo's own End of Service lookup, queried on 8 October 2026. It applies to 7Y98 and 7Y99 with model codes CTO1WW and CTOLWW in EMEA, and the same date is returned for 7Y99 CTO1WW in the NA, AP and LA geos. Only those base model codes are listed. A preconfigured EMEA model, 7Y99A00HEA, returned no date at all, so a unit sold under a region-specific model code cannot be assumed to share it: ask Lenovo, or use the base-model date as a guide only.

Lenovo's LP1160 change log dates two withdrawal steps: preconfigured EPYC 7002 models for EMEA on 22 June 2022, then 'The SR635 is withdrawn from marketing' on 12 March 2025; no separate withdrawal letter was found. To confirm your own server, choose EMEA in the End of Service Date Lookup and enter the machine type, 7Y98 (one-year warranty) or 7Y99 (three-year warranty), which is the first four characters of the label's machine type/model, followed by the model code. The date is set by geography, machine type and model; the warranty or contract on a given unit is looked up separately, by serial number, in Lenovo's warranty lookup.

ThinkSystem SR635: lifecycle on one axis
ThinkSystem SR635 lifecycle timeline201920212023202520272029203120332035Checked 8 Oct 20267 Aug 2019Released22 Jun 2022Preconfigured EPYC 7002models withdrawn in EMEA12 Mar 2025Withdrawn from marketing30 Jun 2033End of Service (EOS), EMEA(base models 7Y98/7Y99CTO1WW and CTOLWW)
Dated milestones are placed only where a source gives the date; Blue = vendor-published, amber = third-party tracker, violet = derived from a vendor policy. Checked 8 October 2026.
Finding the date for your own unit

Lenovo sets End of Service by geography, machine type and model, not by serial number. Open Lenovo's End of Service Date Lookup (https://datacentersupport.lenovo.com/us/en/solutions/ht504708) and choose geo EMEA for UK units. Enter the machine type (7Y98 or 7Y99, the first four characters of the machine type/model on the product label) and the model code. On 2026-10-08, CTO1WW and CTOLWW returned 30 Jun 2033. Preconfigured model codes (for example 7Y99A00HEA) returned no date; for those, ask Lenovo, or use the base-model date as a guide only. Warranty and contract end dates are per unit: enter the serial number at https://datacentersupport.lenovo.com/us/en/warranty-lookup.

What still works after Lenovo support ends

Until 30 June 2033 the SR635's base models sit inside Lenovo's EMEA support window, and firmware downloads need no serial number, as with any Lenovo server product (its storage products do need one with active warranty). The newest platform packages on the 7Y99 list on 8 October 2026 were BMC 7.80 (DS577655, 4 September 2025) and UEFI 7.71 (DS577901, 25 September 2025), both shared with the SR655 and neither flagged as needing login or warranty. For the period after the base-model EOS, Lenovo's EOS notice offers only the general position: support is withdrawn at End of Service, subject to the proviso that 'in some cases, Lenovo will use reasonable commercial endeavors to maintain eligible products beyond the EOS date', and nothing is said about downloads.

The SR635 guide, updated in March 2025, lists warranty upgrades and post-warranty support at Standard Next Business Day, Premier Next Business Day, Premier 24x7 4-Hour Response and Premier Support Plus 24x7 4-Hour Response, noting that 'some warranty upgrades may not be available in all markets or regions'. Availability for a particular unit was not verified, so confirm with Lenovo or a Lenovo partner, and weigh the terms against an alternative to Lenovo Premier Support.

  • Lenovo server software needs no serial number to download: 'For Lenovo Server products, serial numbers are NOT required to download software.' Lenovo storage is different: it needs a valid serial number with active warranty. SR635 firmware downloads are therefore not tied to a warranty or contract. (datacentersupport.lenovo.com)
  • Lenovo's EOS notice treats End of Service as the withdrawal of support. It says that 'in some cases, Lenovo will use reasonable commercial endeavors to maintain eligible products beyond the EOS date'. It does not say whether firmware downloads stay posted after EOS. (datacentersupport.lenovo.com)

Vendor support you can still buy

  • Lenovo warranty upgrades and post-warranty support (Standard Next Business Day, Premier Next Business Day, Premier 24x7 4-Hour Response, Premier Support Plus 24x7 4-Hour Response) — Listed in the SR635 product guide (updated Mar 2025), which notes that 'some warranty upgrades may not be available in all markets or regions'. Lenovo's posted EOS for the base models is 30 Jun 2033. Availability for a given unit was not verified; confirm with Lenovo or a Lenovo partner. (lenovopress.lenovo.com)

What a maintenance contract needs to cover on the ThinkSystem SR635

Start with the management controller, since the SR635 guide does not list the XClarity Controller used on Lenovo's Intel ThinkSystem servers. The SR635 has an ASPEED AST2500 baseboard management controller, reached through the web-based ThinkSystem System Manager (TSM), plus XClarity Provisioning Manager Lite. Lenovo security advisory LEN-98711 lists the 'ThinkSystem SR635/655' BMC for AMI MegaRAC SP-X vulnerabilities CVE-2022-40259, CVE-2022-40242 and CVE-2022-2827 at High severity, with v5.84 as the minimum fixed version, so record the installed BMC level. Where XClarity Administrator manages the server, the guide says XClarity Administrator v3.2.0 or later is required for full firmware-update support, managed authentication and remote control, and that BMC firmware should be v3.56 or later.

Storage reaches four 3.5-inch or 16 2.5-inch hot-swap bays in 1U: front layouts of four 3.5-inch SAS/SATA, eight 2.5-inch SAS/SATA, six SAS/SATA plus four AnyBay, or ten AnyBay, plus optional four NVMe mid bays and two rear bays, with up to 16 NVMe drives, all directly connected. The onboard SATA has no RAID, so hardware RAID needs a 12 Gb SAS/SATA RAID adapter; 12 Gb non-RAID HBAs were also offered. Up to two hot-swap redundant Platinum supplies (550 W, 750 W, 1100 W or 1600 W) or a 1100 W -48 V DC supply provide power, and memory is 16 RDIMM slots up to 2 TB. What third-party maintenance covers varies by contract, but it generally includes diagnosis, replacement parts and engineers, and it can continue beyond a vendor's End of Service.

ThinkSystem SR635: what to tell a maintenance provider
ThinkSystem SR635 hardware factsLENOVO · THINKSYSTEM FIRST-GENERATION AMD(SINGLE-SOCKET EPYC 7002 / 7003)ThinkSystem SR635End-of-life announced — vendorsupport still availableFORM FACTOR / MACHINE TYPES1U rack-mount, single socket. Machine types7Y98 (1-year warranty) and 7Y99 (3-yearwarranty).PROCESSOROne AMD EPYC 7002 ('Rome') or EPYC 7003('Milan') processor, up to 64 cores and 280W TDP.MEMORY16 DIMM slots (8 channels, 2 DIMMs perchannel), TruDDR4 RDIMMs at 3200 or 2933MHz. Maximum 2 TB with 16x 128 GB 3DSRDIMMs. No persistent memory support.DRIVE BAYSUp to 4x 3.5-inch or 16x 2.5-inch hot-swapbays. Front: 4x 3.5-inch SAS/SATA, 8x2.5-inch SAS/SATA, 6x SAS/SATA plus 4xAnyBay, or 10x AnyBay. Optional 4x 2.5-inchNVMe mid bays and 2x 2.5-inch rear bays(SAS/SATA or NVMe). Up to 16 NVMe drives,all directly connected.STORAGE CONTROLLERSOnboard SATA for up to 12 drives (no RAID),12 Gb SAS/SATA RAID adapters, and 12 GbSAS/SATA non-RAID HBAs.POWER SUPPLIESUp to two hot-swap redundant 80 PLUSPlatinum AC power supplies: 550 W, 750 W,1100 W or 1600 W. A 1100 W -48 V DC supplyis also available.MANAGEMENT CONTROLLERASPEED AST2500 baseboard managementcontroller, accessed remotely through theweb-based ThinkSystem System Manager (TSM),plus XClarity Provisioning Manager Lite.The SR635 guide does not list the XClarityController (XCC) used on Lenovo's IntelThinkSystem servers.7 sourced specification facts · checked 8 October 2026
The hardware facts a maintenance quote is priced on, printed in the vendor's own wording from its specification documents (cited in Sources). Nothing on this plate is estimated; facts the vendor does not state are left off rather than filled in.
ThinkSystem SR635 hardware, from Lenovo’s own specification documents
SpecificationDetailSource
Form factor / machine types1U rack-mount, single socket. Machine types 7Y98 (1-year warranty) and 7Y99 (3-year warranty).lenovopress.lenovo.com
ProcessorOne AMD EPYC 7002 ('Rome') or EPYC 7003 ('Milan') processor, up to 64 cores and 280 W TDP.lenovopress.lenovo.com
Memory16 DIMM slots (8 channels, 2 DIMMs per channel), TruDDR4 RDIMMs at 3200 or 2933 MHz. Maximum 2 TB with 16x 128 GB 3DS RDIMMs. No persistent memory support.lenovopress.lenovo.com
Drive baysUp to 4x 3.5-inch or 16x 2.5-inch hot-swap bays. Front: 4x 3.5-inch SAS/SATA, 8x 2.5-inch SAS/SATA, 6x SAS/SATA plus 4x AnyBay, or 10x AnyBay. Optional 4x 2.5-inch NVMe mid bays and 2x 2.5-inch rear bays (SAS/SATA or NVMe). Up to 16 NVMe drives, all directly connected.lenovopress.lenovo.com
Storage controllersOnboard SATA for up to 12 drives (no RAID), 12 Gb SAS/SATA RAID adapters, and 12 Gb SAS/SATA non-RAID HBAs.lenovopress.lenovo.com
Power suppliesUp to two hot-swap redundant 80 PLUS Platinum AC power supplies: 550 W, 750 W, 1100 W or 1600 W. A 1100 W -48 V DC supply is also available.lenovopress.lenovo.com
Management controllerASPEED AST2500 baseboard management controller, accessed remotely through the web-based ThinkSystem System Manager (TSM), plus XClarity Provisioning Manager Lite. The SR635 guide does not list the XClarity Controller (XCC) used on Lenovo's Intel ThinkSystem servers.lenovopress.lenovo.com

Extend or refresh the ThinkSystem SR635?

With the EMEA base-model EOS more than six years away, an SR635 is a reasonable candidate for extending, whether under a Lenovo post-warranty plan, if Lenovo still offers one for the unit, or a third-party contract. For the EPYC 7003 build, Lenovo's OS Interoperability Guide (data updated 30 September 2026) gives 'Supported & Certified' for Windows Server 2016, 2019 and 2022, ESXi 7.0 U2 through 8.0 U3, and RHEL 9.0 to 9.8; the EPYC 7002 entry lists Windows Server 2016 to 2022 and ESXi 7.0 through 8.0 U3. Check that the BMC is at or above v5.84, the LEN-98711 minimum fixed version.

The operating-system ceiling is what may bring a refresh forward. Both processor entries show no support for Windows Server 2025 or for ESXi 9.0 and 9.1, and the EPYC 7003 entry shows none for RHEL 10, so a host that must move to Windows Server 2025 or ESXi 9 has no certified path on the SR635 whatever its EOS date says, and nor does an EPYC 7003 unit headed for RHEL 10. The OS Interoperability Guide marks the SR635 'Withdrawn' and lists the ThinkSystem SR635 V3 (5th Gen EPYC, machine types 7D9H/7D9G), the next model in the same line, whose own guide says it 'improves on the previous generation SR635'.

  • The SR635 BMC is affected by Lenovo advisory LEN-98711 (AMI MegaRAC SP-X BMC vulnerabilities CVE-2022-40259, CVE-2022-40242 and CVE-2022-2827; severity High). The advisory lists the 'Lenovo ThinkSystem SR635/655 Baseboard Management Controller (BMC)' with minimum fixed version v5.84. (datacentersupport.lenovo.com)
  • Lenovo is still releasing SR635 firmware. On 2026-10-08 the newest platform firmware on Lenovo's 7Y99 download list was BMC 7.80 (DS577655, dated 4 Sep 2025) and UEFI 7.71 (DS577901, dated 25 Sep 2025), both shared with the SR655. Neither package was flagged as requiring login or warranty. (datacentersupport.lenovo.com)
  • For XClarity Administrator management, the guide says XClarity Administrator v3.2.0 or later is required for full firmware-update support, managed authentication and remote control. It also says the BMC firmware should be v3.56 or later. (lenovopress.lenovo.com)
  • Lenovo's OS Interoperability Guide (data updated 30 Sep 2026) lists the SR635 with EPYC 7003 as 'Supported & Certified' for Windows Server 2016, 2019 and 2022, VMware ESXi 7.0 U2 through 8.0 U3, and RHEL 9.0 to 9.8. It shows no support ('None') for Windows Server 2025, ESXi 9.0 or 9.1, or RHEL 10. (lenovopress.lenovo.com)
  • The OS Interoperability Guide entry for the SR635 with EPYC 7002 also shows no support ('None') for Windows Server 2025 or ESXi 9.0/9.1. It lists Windows Server 2016-2022 and ESXi 7.0 through 8.0 U3 as 'Supported & Certified'. (lenovopress.lenovo.com)
  • Lenovo's OS Interoperability Guide marks the SR635 'Withdrawn' and names the ThinkSystem SR635 V3 (5th Gen EPYC, machine types 7D9H/7D9G) as its replacement server. (lenovopress.lenovo.com)
  • The SR635 V3 product guide says the SR635 V3 'improves on the previous generation SR635'. (lenovopress.lenovo.com)
ThinkSystem SR635: what came before and what replaces it
ThinkSystem SR635 product lineageThinkSystem SR635Released 7 Aug 2019End-of-life announced; vendorsupport availableThinkSystem SR635 V3Next model in the same lineDatasheet on this siteLenovo · ThinkSystem first-generation AMD (single-socket EPYC 7002 / 7003)
The successor shown is the next model in the same product line; the vendor notice does not name a direct replacement. No predecessor is shown because none could be sourced.

Specifications for the replacement: ThinkSystem SR635 V3 datasheet.

Keep your ThinkSystem SR635 covered

Tell us how many you run and when your current cover ends, and we will come back with a like-for-like maintenance quote for that estate. Your model and its support status are attached to the enquiry automatically, so there is nothing to re-type.

Lenovo maintenance in detail →

In Lenovo's documents the SR635's nearest relative is the SR655: the BMC 7.80 and UEFI 7.71 packages on the SR635 download list are shared with it, and advisory LEN-98711 names the two together as the 'ThinkSystem SR635/655' BMC. Lenovo Press first published the SR635 guide, LP1160, on 7 August 2019, and the same guide's change log carries the 12 March 2025 withdrawal. Lenovo's SR650 and SR630 have a separate end-of-life deep dive.

Where the ThinkSystem SR635 sits against related models
ThinkSystem SR635: 6.7 years to end of support (30 June 2033, the vendor’s date).2017201920212023202520272029203120332035ThinkSystem SR550ThinkSystem SR530ThinkSystem ST550ThinkSystem ST250ThinkSystem SR635ThinkSystem SR650 V2ThinkSystem SR630 V2TodayThinkSystem SR635: 6.7 years to end of support (30 June 2033, the vendor’s date).
Each bar runs from release to the milestone that marks end of support for the model as a whole. Amber bars end on a third-party tracker's date, not the vendor's. A dashed open end means no end date is published — not that support is indefinite. Component and accessory dates (a management controller, a power module) are not treated as the model's.

Look up another model in the server & network end-of-life checker, or read what third-party maintenance covers.

Questions people ask about the ThinkSystem SR635

When is the Lenovo SR635 end of life?

Lenovo's End of Service date for the SR635 base models CTO1WW and CTOLWW, machine types 7Y98 and 7Y99, is 30 June 2033 in EMEA (queried 8 October 2026). Sales ended earlier: Lenovo's LP1160 change log records the SR635's withdrawal from marketing on 12 March 2025.

Does the 2033 date apply to every SR635?

Not necessarily. Lenovo's lookup lists only the CTO1WW and CTOLWW model codes, and a preconfigured EMEA model, 7Y99A00HEA, returned no date. For other model codes, ask Lenovo or treat the base-model date as a guide only; warranty and contract end dates are per serial number. Other servers in an estate can be run through the server end-of-life checker.

Is the SR635 affected by the AMI MegaRAC BMC vulnerabilities?

Its BMC is listed. Lenovo advisory LEN-98711 names the ThinkSystem SR635/655 BMC for CVE-2022-40259, CVE-2022-40242 and CVE-2022-2827, rated High, with v5.84 as the minimum fixed version, so check the installed level. The newest BMC package on Lenovo's 7Y99 list on 8 October 2026 was 7.80.

Can I run Windows Server 2025 on the SR635?

Lenovo's OS Interoperability Guide (data updated 30 September 2026) shows no support for Windows Server 2025 on the SR635 with either EPYC 7002 or EPYC 7003. Windows Server 2016, 2019 and 2022 are 'Supported & Certified' on both.

What came after the ThinkSystem SR635?

The ThinkSystem SR635 V3, with 5th Gen EPYC processors, is the next model in the same line. Lenovo's OS Interoperability Guide lists it against the SR635, and the SR635 V3 guide says it improves on the previous generation SR635; neither document is an end-of-life notice.

Sources

Every date, rule and specification above was checked against these on 8 October 2026 by an independent verification pass. Vendors revise lifecycle notices; this page is re-checked by 8 January 2027.

  1. Lenovo ThinkSystem SR635 Server Product Guide (withdrawn product), LP1160 — lenovopress.lenovo.com
  2. Lenovo End of Service Date Lookup (HT504708), end-of-service API, 7Y99 CTO1WW, EMEA — datacentersupport.lenovo.com
  3. datacentersupport.lenovo.com — datacentersupport.lenovo.com
  4. datacentersupport.lenovo.com — datacentersupport.lenovo.com
  5. datacentersupport.lenovo.com — datacentersupport.lenovo.com
  6. datacentersupport.lenovo.com — datacentersupport.lenovo.com
  7. lenovopress.lenovo.com — lenovopress.lenovo.com
  8. lenovopress.lenovo.com — lenovopress.lenovo.com
  9. lenovopress.lenovo.com — lenovopress.lenovo.com

Last reviewed 7 October 2026. Lifecycle dates for the ThinkSystem SR635 are re-verified against Lenovo's own notices at each review; a date a vendor has not published is never filled in.