Lenovo ThinkSystem SR650 Series Setup Manual page 32

4 USB 3.0 connectors (2)
Used to attach a device that requires a USB 2.0 or 3.0 connection, such as a keyboard, a mouse, or a USB
storage device.
5 NMI button
Press this button to force a nonmaskable interrupt (NMI) to the processor. By this way, you can blue screen
the server and take a memory dump. You might have to use a pen or the end of a straightened paper clip to
press the button.
6 Power supply 1
7 Power supply 2 (available on some models)
The hot-swap redundant power supplies help you avoid significant interruption to the operation of the
system when a power supply fails. You can purchase a power supply option from Lenovo and install the
power supply to provide power redundancy without turning off the server.
On each power supply, there are three status LEDs near the power cord connector. For information about the
status LEDs, see "Rear view LEDs" on page 29.
8 9 10 11 12 13 PCIe slots
You can find the PCIe slot numbers on the rear of the chassis.
Notes:
• Your server supports PCIe slot 5 and PCIe slot 6 when two processors are installed.
• Do not install PCIe adapters with small form factor (SFF) connectors in PCIe slot 6.
• Observe the following PCIe slot selection priority when installing an Ethernet card or a converged network
adapter:
Number of installed processors
One processor
Two processors
PCIe slots 1, 2, and 3 on riser 1:
There are five different riser cards that can be installed in riser 1.
• Type 1
– Slot 1: PCIe x16 (x8, x4, x1), full-height, half-length/full-height, full-length
– Slot 2: PCIe x16 (x8, x4, x1), full-height, half-length/full-height, full-length
– Slot 3: PCIe x16 (x8, x4, x1), full-height, half-length
• Type 2
– Slot 1: PCIe x16 (x8, x4, x1), full-height, half-length/full-height, full-length
– Slot 2: PCIe x16 (x8, x4, x1), full-height, half-length/full-height, full-length
– Slot 3: ML2 x8 (x8, x4, x1), full-height, half-length
• Type 3
– Slot 1: PCIe x16 (x16, x8, x4, x1), full-height, half-length/full-height, full-length
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ThinkSystem SR650 Setup Guide
PCIe slot selection priority
4, 2, 3, 1
4, 2, 6, 3, 5, 1