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Start out with just a single processor and six memory slots, then as your workload increases add a CPU mezzanine with a second processor slot and six more memory slots. The HP Z6 G4 is a workhorse workstation that can handle just about anything and has plenty of room for expansion.
The system will support one or two intel Xeon Scalable processors from the Bronze, Silver, Gold or Platinum families with up to 28 cores. A second processor can be installed on an optional CPU/Memory module, which connects to the system board through a large slot just above the PCIe slots. The CPU/Memory module also has six more memory slots. Each Scalable processor supports six memory channels.
With a single processor installed, the system can support up to 192GB of memory. With two processors installed, the system will support a maximum of 384GB of memory using 32GB memory modules. Memory runs at speeds that include 2133MHz, 2400MHz or 2666MHz depending on both the speed of the processor and the memory speed, with the system defaulting to the slowest performer between the two. In the case of the Z6 G4, each memory modules runs on its own memory channel. On the Z8 G4 workstation there are 24 memory module slots, and each memory channel supports two memory modules. Only registered DDR4 memory modules are supported.
HP says the Z6 G4 will support a maximum of 22TB of storage. There are two internal storage bays, and two additional storage bays using the optical drive bays on the front of the system outfitted with optional drive cages. Both storage conditions can support either 2.5-inch or 3.5-inch HDDs or SSDs. Additional optional super-fast storage is provided by two M.2 slots, SATA only, on the system board. You can also add an HP Quad Turbo Drive PCIe card that supports up to four M.2 storage devices at up to 1TB each. Both SAS and SATA are supported but SAS will require an optional PCIe card HD/RAID controller. If you are going with SATA drives you can use the integrated drive controller with 6Gb/s speeds that supports RAID 0, 1 and NCQ with Windows only. Operating systems other than Windows will require a stand up PCIe card for use as an HD/RAID controller.
There are six possible PCIe slots on the system board, if you don’t count PCIe slot 0 used to connect the second CPU/Memory module or the other two PCIe x4 slots on the system board that support two M.2 storage devices. Slots 1, 2, 4, and 5 are active with a single processor, along with both M.2 x4 slots. Slot 4 which is a x8 slot, converts to a x4 slot with the addition of the second M.2 module. With the addition of the CPU/memory module PCIe slots 3 and 6 become active. All PCIe slots on the system board are Gen 3.0 but are backward compatible to support older technology at somewhat slower speeds.
Intel Active Management Technology gives you an advanced set of out-of-band management tools to remotely access the system for status, diagnosis, and remediation. HP Remote Graphics Software (RGS) enables you to access your workstation using another PC, a Mac, or Windows-based tablet from anywhere with a suitable Internet connection. RGS only transmits the pixel information and is limited on screen resolution but does a great job enabling the design process to continue. The HP Performance Advisor helps you to tailor your working environment to get the most out of your Independent Software Vendor (ISV) certified programs.
The HP Z6 G4 workstation may be the second most powerful desktop workstation that HP offers but it still delivers the goods where performance is concerned. It offers support for top-of-the-line processors up to 28 cores each for 56 cores total in a two-processor configuration. The HP Performance Advisor will also help you get the most performance from your ISV certified programs.