View source for POWER8E

{{Infobox
|title = Processor Information
|header1 = POWER8E
|label2 = [[Power ISA|Power ISA]]
|data2 = 2.07
|label3 = Process node
|data3 = 22nm
|label4 = Maximum slices
|data4 = 12
|label5 = Maximum cores
|data5 = 12 SMT8
|label6 = L2 cache / slice
|data6 = 512kB
|label7 = L3 cache / slice
|data7 = 8MB
|label8 = Production availability
|data8 = 2016
|label9 = Production stepping(s)
|data9 = DD2.1
|label10 = [[POWER8|← POWER8]]
|data10 = [[POWER9|POWER9 →]]
}}

'''POWER8E''' (also known as '''POWER8 with NVLink''', '''POWER8’''' (with a prime symbol), '''8335-GTB POWER8''', or '''POWER8+''') processors have a different socket than standard POWER8 chips.

Compared to a standard POWER8 Single Chip Module (SCM), the POWER8 with NVLink modifies:

* 2<sup>nd</sup> CAPP unit added, X2 removed
* x8 PHB
* x8 IOP
* A-bus removed, NVLink added
* NVLink support added in extended ES
* Chip height: 2 C4 rows added

Without A-bus or SMP over PCIe, the processors in a multisocket configuration instead use X-Bus for SMP. The chip size is 659 mm<sup>2</sup>, rather than 649 mm<sup>2</sup> for POWER8, and only available for the ''S822LC for HPC'', specifically the ''8335-GTB'' model.
<ref>Caldeira, Alexandre Bicas; Haug, Volker. [https://www.redbooks.ibm.com/redpapers/pdfs/redp5405.pdf IBM Power System S822LC for High Performance Computing Introduction and Technical Overview] (PDF). IBM Redpaper. ISBN 9780738455617.</ref><ref>Gupta, Sumit. [https://www.ibm.com/blogs/systems/ibm-nvidia-present-nvlink-server-youve-waiting/ IBM & NVIDIA present the NVLink server you’ve been waiting for] (HTML). 2016-09-08. IBM IT Infrastructure Blog.</ref>

== Configurations ==

{| class="wikitable sortable"
|+ Known POWER8E parts
! Part
! Cores
|-
| 00UL668
| 10
|-
| 00UL670
| 8
|}

Sourced from [[:File:POWER8 wNVLink DS v1.7 11DEC2017 pub.pdf|POWER8E data sheet v1.7]] (see Table 6-2 on page 65).

== External Links ==

* [https://www-355.ibm.com/systems/power/openpower/tgcmDocumentRepository.xhtml?aliasId=POWER8_with_NVIDIA_NVLink POWER8 with NVLink at IBM OpenPOWER portal]
* [https://en.wikipedia.org/wiki/POWER8#POWER8_with_NVLink POWER8 with NVLink section of Wikipedia POWER8 article]

== References ==
<references/>
[[Category:POWER]]