15
Chapter 1: Introduction
Figure 1-4. SXM2 Add-on Module Block Diagram
1029GQ-TXRT: Add-on Module Version
The 1029GQ-TXRT system supports four PASCAL SXM P100 GPUs installed on the AOM-
SXM2 add-on module which is connected to the motherboard by two bridges.
A direct connection between GPUs 1 and 4, and between GPUs 2 and 3 is provided by a
double NVlink connection (40GB/s). All other connections between GPUs are single NVlink.
Fastest connections are afforded when GPUs are added in pairs.
The system offers four PCI-E 3.0 x16 expansion slots. Only two slots (Slot #2 from RSC-
G-A66-X1 and RSC-GN2-66) provide a direct connection from GPUs to the network. A fast
network (expansion) card installed on the riser card affords very high speeds. With OCuLink
cables (CBL-SAST-0934-1) connected, data can go from GPU to the PLX to the NIC while
bypassing the CPU. For the NIC, the system can support both FDR and EDR (in x16 slots).
SXM
SXM
SXM
SXM
PLX
PLX
AOM-SXM-BRG
AOM-SXM-BRG
CPU1
CPU2
RSC-G-A66-X1
Upper Slot
Lower Slot
RSC-GN2-66
Upper Slot
Lower Slot
AOM-SXM2
MBD-X11DGQ
X16
X16
X16
X16
X16
X16
X16
X16
X16
X16
NVLINK - VOLTA
UPI
PCIE 3.0