HPE ProLiant BL685c G7 Processors
Genuine HPE processor option kits for the HPE ProLiant BL685c G7, new and refurbished. This is a four-socket AMD Opteron blade on the AMD SR5690 and SP5100 chipset, and HPE supports two-processor and four-processor configurations only — which is why every option kit for it holds two processors rather than one.
BL685c G7 Processor Specifications
- Sockets: four, on the AMD SR5690 and SP5100 chipset, upgradeable from two processors to four
- Supported configurations: two processors or four processors; one and three are not supported
- Kit contents: every BL685c G7 processor option kit contains two processors, complete with heatsink and fans
- Four-processor builds: HPE reaches four by pairing one xxxxxx-L21 kit with one xxxxxx-B21 kit of the same processor
- Kits listed here: twelve-core Opteron 6174, 6172 and low-power 6164 HE, and eight-core Opteron 6136 and low-power 6128 HE, each carrying 12MB of L3 cache
- Platform ceiling: the QuickSpecs for this blade document AMD Opteron 6300 series parts from four to sixteen cores with 16MB of L3 cache
Every processor kit for this blade holds two processors. The BL685c G7 is supported with two or four processors and nothing in between, so a full blade is two kits — HPE's own route to four pairs one xxxxxx-L21 kit with one xxxxxx-B21 kit. There is no supported way to run this model on one processor or on three.
How Many Cores per Kit, and at What Power?
| Two-processor kit | Cores each | Clock | L3 cache | Power |
|---|---|---|---|---|
| AMD Opteron 6174 | 12 | 2.2GHz | 12MB | 80W ACP |
| AMD Opteron 6172 | 12 | 2.1GHz | 12MB | 80W ACP |
| AMD Opteron 6164 HE | 12 | 1.7GHz | 12MB | 65W ACP |
| AMD Opteron 6136 | 8 | 2.4GHz | 12MB | 80W ACP |
| AMD Opteron 6128 HE | 8 | 2.0GHz | 12MB | 65W ACP |
One kit of twelve-core 6174s is 24 cores; two kits fill the blade at 48. The HE parts give up a few hundred megahertz for 15 watts per processor, which counts for more in a blade than in a rack server, because the enclosure's power and cooling are shared with every other bay in it. Watch the measure as well as the number: these kit names quote ACP, while the QuickSpecs quotes TDP for the Opteron 6300 series, and the two figures are not comparable.
Choosing the Right BL685c G7 Processor
- Buy in kits of two, and in pairs for a full blade. Going from two processors to four means a second kit, and HPE's own four-processor route pairs an xxxxxx-L21 kit with an xxxxxx-B21 kit.
- The second pair unlocks the other sixteen DIMM slots. With two processors fitted, half the blade's 32 memory slots are unavailable, which is often the real reason to fill the remaining sockets.
- Do not plan a single-processor blade. HPE supports two-processor and four-processor configurations on this model and nothing else.
- Every processor installed needs at least one DIMM. Adding a pair of processors without memory behind them leaves the new sockets with nothing to run.
- Processor generation decides what memory will run. Load Reduced DIMMs are supported on Opteron 6200 and 6300 series parts only, so a blade built on the kits above is a Registered-DIMM machine.
Complete Your BL685c G7 Build
Socket count and memory capacity move together on this blade — see BL685c G7 memory alongside this page. Also available: BL685c G7 hard drives and storage controllers, or the full BL685c G7 parts listing. For processors for other blades, see the HPE ProLiant BL685c G6 and the HPE ProLiant BL465c G7, or the wider HPE parts by server model index.
BL685c G7 Processors FAQ
How many processors does the BL685c G7 support?
Up to four AMD Opteron processors, in two-processor or four-processor configurations only. HPE does not support running this blade with one processor or with three.
Why do BL685c G7 processor kits contain two processors?
Because the blade is only supported with two or four processors fitted. HPE packages the option kits in pairs to match, so a kit takes the blade from empty to two, or from two to four.
How do I get to four processors?
With two kits of the same processor. HPE's documented route for a four-processor build is one xxxxxx-L21 kit plus one xxxxxx-B21 kit.
Does adding processors do anything besides add cores?
Yes. With two of the four sockets filled, only sixteen of the blade's 32 DIMM slots are available, so the second pair of processors is what opens the rest of the memory capacity.
Do BL685c G7 processor kits include a heatsink?
Yes. Every processor option kit listed for this blade comes complete with heatsink and fans.
What does ACP mean on these kits?
Average CPU Power, the measure AMD used alongside Thermal Design Power. The kit names on this page quote ACP, while the QuickSpecs quotes TDP for the Opteron 6300 series, so the two wattage figures should not be compared directly.
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