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Lenovo System x x3550 M5 vs Lenovo System x x3650 M5

Specs & price comparison · 2-socket 1U rack · used / refurbished market

x3550 M5 is the cheaper buy right now: about $20.14 sold vs $144.32 for x3650 M5, ~617% less.

Based on completed eBay sales (30d): 1 for x3550 M5, 4 for x3650 M5. 0 x3550 M5 live now · 0 x3650 M5.

At a glance

  • Pricex3550 M5 — $144 vs $20
  • Efficiencyx3550 M5 — 100W idle vs 70W idle

Edge: Lenovo System x x3550 M5 wins more dimensions.

Specifications

Specx3550 M5x3650 M5
Vendor / familyLenovo System xLenovo System x
GenerationM5M5
Form factor1U rack2U rack
CPU sockets22
Max RAM1536 GB1536 GB
RAM speed2400 MT/s2400 MT/s
PCIe genPCIe 3.0PCIe 3.0
Idle power (1 CPU)70 W100 W
Noise tier3, Moderate3, Moderate
Typical sold price$20.14$144.32

x3550 M5 sold price trend

Mar 2: $391.83 (1 sold comp)May 4: $20.14 (1 sold comp)
2026-03-02$20.14–$391.83 · sold median2026-05-04

Dot size reflects how many listings back each day (1 sold comp per point). Hover for details.

x3650 M5 sold price trend

Apr 22: $63.78 (1 sold comp)Sep 30: $103.22 (1 sold comp)Jan 26: $103.22 (1 sold comp)Feb 23: $427.45 (1 sold comp)Mar 2: $61.77 (1 sold comp)Mar 23: $178.10 (3 sold comps)Apr 6: $26.86 (3 sold comps)Apr 13: $24.69 (1 sold comp)May 4: $146.14 (2 sold comps)May 11: $144.32 (4 sold comps)Jun 3: $144.32 (6 sold comps)Jun 6: $143.96 (5 sold comps)Jun 7: $143.96 (5 sold comps)Jun 8: $143.96 (5 sold comps)Jun 9: $144.32 (4 sold comps)Jun 10: $144.32 (4 sold comps)
2024-04-22$24.69–$427.45 · sold median2026-06-10

Dot size reflects how many listings back each day (1–6 sold comps per point). Hover for details.

x3550 M5 price historyx3650 M5 price history

← All price histories