Outdated - Servers that primarily offer Space Heater as a Service. Most modern enterprise operating systems have deprecated the processors or drivers (although an argument can be made for Linux). These are the least efficient servers you can buy secondhand, and should only be considered at extremely low upfront cost.
Out of warranty - Servers that are past warranty but still supported by enterprise operating systems to an extent. Drivers are starting to become deprecated. This is generally the sweet spot in terms of cost to efficiency as IT shops start rotating these out for more modern hardware. Both low and high end processors can be had for a fraction of what they were new.
Hardware refresh - Servers that are still under warranty or capable of being under warranty, but are no longer sold as new by the manufacturer. Servers with flagship processors can be had for a good price, but higher end parts still have the enterprise premium as shops will try to upgrade to avoid a full refresh of their environment.
Latest - Servers that are being offered by manufacturer as new. These are the most expensive servers that can be purchased, deals are hard to come by.
Notes:
Dell generation is determined by the number in the middle. For instance, an R610 would be considered 11G, R620 12G, and so on. The AMD variants end with the number 5, such as the R715, or the R7515.
Lenovo changed the MX moniker to SR for rack, ST for tower starting with the Xeon Scalable generation, with a similar designation for Intel/AMD as Dell (0 and 5 respectively).
Outdated
|
Out of Warranty
|
Hardware Refresh
|
Latest
|
Intel
|
|||
Xeon
E/X 5500/5600 (DDR3)
|
E5
V1/V2 (DDR3)
|
E5
V3/V4 (DDR4)
|
Scalable
gen 1/gen 2 (DDR4)
|
Dell
11G
|
Dell
12G
|
Dell
13G
|
Dell
14G
|
HPE
G6/G7
|
HPE G8
|
HPE G9
|
HPE
G10
|
IBM M3
|
IBM M4
|
Lenovo
(IBM) M5
|
Lenovo
SRXX0
|
Cisco M1/M2
|
Cisco
M3
|
Cisco
M4
|
Cisco
M5
|
AMD
|
|||
Opteron
(DDR3)
|
Threadripper
(DDR4)
|
||
Dell
11G
|
Dell 14G/15G
|
||
HPE
G7/G8
|
HPE G10
|
||
IBM M3
|
Lenovo SRXX5
|
