HPE ProLiant SL4540 Gen8 Processors
Genuine HPE processor option kits for the HPE ProLiant SL4540 Gen8, new and refurbished. Each server node takes up to two Intel Xeon E5-2400 or E5-2400 v2 processors on the Intel C600 chipset, and HPE does not support mixing different processor models — so a second CPU has to match the first exactly, and each node in a multi-node chassis is specified on its own.
SL4540 Gen8 Processor Specifications
- Sockets: two per server node, so a 1x60 chassis holds two processors, a 2x25 holds four and a 3x15 holds six
- Families: Intel Xeon E5-2400 and E5-2400 v2 series; an L before the version number marks the low power parts
- E5-2400 v2 kits stocked: the ten-core E5-2470 v2 at 2.4GHz and 95W and E5-2450L v2 at 1.7GHz and 60W, eight-core E5-2450 v2 and E5-2440 v2, six-core E5-2430 v2, E5-2430L v2 and E5-2420 v2, and the quad-core E5-2407 v2
- E5-2400 kits stocked: eight-core E5-2470 and E5-2450, six-core E5-2440, E5-2430, E5-2420 and the 60W E5-2430L, and the quad-core E5-2407
- Cache: 25MB of L3 on ten-core parts, 20MB on eight-core, 15MB on six-core and 10MB on quad-core
- Memory clock: within the original E5-2400 series HPE rates the E5-2450 and E5-2470 for DDR3-1600, the E5-2420, E5-2430, E5-2430L and E5-2440 for DDR3-1333, and the E5-2407 for DDR3-1066
- Kit contents: every processor kit listed for this server is complete with heatsink and fan or fans
Every node is specified on its own. Two sockets per node means two processors in a 1x60, four in a 2x25 and six in a 3x15 — and mixing different processor models within a node is not supported, so a second CPU must match the first. With one processor fitted, six of that node's twelve DIMM slots are unavailable.
How Many Cores Does the Node Need?
| Class | Example kit | Cores | Cache | Wattage |
|---|---|---|---|---|
| Ten-core | E5-2470 v2 2.4GHz | 10 | 25MB | 95W |
| Ten-core, low power | E5-2450L v2 1.7GHz | 10 | 25MB | 60W |
| Six-core | E5-2430 v2 2.5GHz | 6 | 15MB | 80W |
| Quad-core | E5-2407 v2 2.4GHz | 4 | 10MB | 80W |
The two ten-core rows are the interesting comparison on a storage chassis. The E5-2450L v2 gives the same core count and the same 25MB of cache as the E5-2470 v2 inside 60 watts rather than 95, at a much lower clock — which suits a node whose work is feeding drives rather than running hot single-threaded code. Multiply the difference by three nodes and a full drive section, and the power budget is a real decision rather than a rounding error.
Choosing the Right SL4540 Gen8 Processor
- A second processor must match the first. Mixing different processor models in a node is not supported, so going to two CPUs means two of the same kit unless the existing one is being replaced.
- The second processor unlocks the other six DIMM slots. With one CPU installed only half of the node's twelve slots are available, which is often the real reason to add one.
- Moving from E5-2400 to E5-2400 v2 is not a drop-in. HPE documents the upgrade as possible but publishes a customer advisory of requirements and limitations for it, so treat it as a planned change rather than a swap.
- Specify per node, not per chassis. A three-node machine is three independent two-socket servers, and nothing is gained by matching processors across nodes that do not share a memory bus.
- Check the wattage against the supplies. Six 95W processors and 45 spinning drives is a different power budget from two 60W parts, and the chassis supplies are shared.
Complete Your SL4540 Gen8 Build
Processor generation decides which memory kit family to buy and how much power the chassis draws — see SL4540 Gen8 memory and power supplies alongside this page. Also available: SL4540 Gen8 drives, storage controllers, networking adapters and rack options, or the full SL4540 Gen8 parts listing. Other models are listed under HPE parts by server model.
SL4540 Gen8 Processors FAQ
Which processors does the SL4540 Gen8 support?
Intel Xeon E5-2400 and E5-2400 v2 series, up to two per server node. The range runs from a four-core E5-2407 to a ten-core E5-2470 v2, with low power L parts at 60W in both the six-core and ten-core classes.
How many processors fit in an SL4540 Gen8 chassis?
Two per node, so two in a 1x60 model, four in a 2x25 model and six in a 3x15 model. Each node is specified separately.
Can I mix different processors in an SL4540 Gen8 node?
No. HPE does not support mixing different processor models, so both sockets in a node must carry the same part.
Can I upgrade an E5-2400 node to E5-2400 v2 processors?
HPE documents the upgrade as available but publishes a customer advisory setting out requirements and limitations first. It is a planned change with prerequisites, not a straight swap.
Does a second processor do anything besides add cores?
Yes. With one processor installed only six of the node's twelve DIMM slots are usable, so the second CPU is what opens the rest of that node's memory capacity.
Do SL4540 Gen8 processor kits include a heatsink?
Yes. Every CPU kit listed for this server comes complete with heatsink and fan or fans.
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