HP Z840 Workstation User Manual

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Technical white paper | HP Z840 Workstation
I/O slot optimizations
The HP Z840 Workstation utilizes PCI-Express 3.0 technology. This section
provides guidance on optimizing the performance of your system when using
PCI-Express cards.
Integrated PCI and PCI-Express 3.0
The HP Z840 uses the Intel® Xeon® processor E5-1600 v3 and E5-2600 v3 series, with integrated PCI-Express 3.0
controllers delivering a peak bandwidth of 16 GB/s per direction. PCI-Express 3.0 is backward compatible with 1.0 and
2.0, and slots will train to the highest common speed. PCI Express 3.0 slots will initialize at 1.0 and then transition to 3.0
through a training sequence that involves four adaptive training phases. It is recommended to carefully evaluate and
validate PCI-Express 3.0 devices that are not available or supported from HP.
See Figure 1 in previous section for the HP Z840 Workstation Block Diagram
PCI-Express performance
The HP Z840 integrates PCIe 3.0 controllers within the processor, DMA caching in the CPU, an integrated 4-channel
memory controller, PCIe 3.0 speeds, and a dual QPI processor interconnect at up to 9.6 GT/s. This produces excellent
performance in I/O bandwidth, remote bandwidth, and latency.
Figure 2. x16 Peak Bandwidth per Direction—Gb/s
16
12
8
4
0
Gen 1.0 Gen 2.0 Gen 3.0

HP Z840 Workstation Specifications

General

Brand	HP
Model	Z840 Workstation
Category	Desktop
Language	English