ContaCt InformatIon
• Manuals: http://www.supermicro.com/support/manuals
• Drivers & Utilities: https://www.supermicro.com/wftp/driver/
• Safety: http://www.supermicro.com/about/policies/safety_information.cfm
The C9X299-PG300 supports a single Intel®
Core
TM
i9 7900X/9900X/10900X series processor, up to 256GB of
Unbuffered (UDIMM) non-ECC DDR4 memory, with speeds of up to 2666MHz (2DPC) ~ 2933MHz (1DPC) in eight
288-pin memory slots. Populating these DIMM slots with a pair of memory modules of the same type and size will
result in interleaved memory, which will improve memory performance.
Notes: 1) For memory optimization, use only DIMM modules that have been validated by Supermicro. For the latest memory updates, please
refer to our website at http://www.supermicro.com/products/motherboard.
2) Always connect the power cord last, and always remove it before adding, removing or changing any hardware components.
3) 2933MHz is supported by Intel Core i9 10980XE/10940X/10920X/10900X series processors only.
DIMM Memory Installation
LED Indicators
LED Description Color/State
LED1 Status Code LED Digital Readout
LED6903 M.2 Socket 2 SSD Active LED Activity: Green Blinking
LED6904 M.2 Socket 1 SSD Active LED Activity: Green Blinking
LED7201 Onboard Standby PWR LED Power on: Green on
LED Indicators
CPU & Memory Support
CPU & Memory Support
Memory Population Guidelines
When installing memory modules, the DIMM slots should be populated in the following order: DIMMA1, DIMMB1,
DIMMC1, DIMMD1, then DIMMA2, DIMMB2, DIMMC2, DIMMD2.
• Always use DDR4 DIMM modules of the same size, type, and speed.
• Mixed DIMM speeds can be installed. However, all DIMMs will run at the speed of the slowest DIMM.
Recommended Population (Balanced)
DIMMA1 DIMMB1 DIMMC1 DIMMD1 DIMMA2 DIMMB2 DIMMC2 DIMMD2
CPU Support/
DIMM Channel
Total
System Memory
4, 8, 16,
32GB
4, 8, 16,
32GB
N/A N/A N/A N/A N/A N/A
Core i9 7900X/ i7 7800X series,
Dual channel
Up to 64GB
4, 8, 16,
32GB
4, 8, 16,
32GB
4, 8, 16,
32GB
4, 8, 16,
32GB
N/A N/A N/A N/A
Core i9 7900X/ i7 7800X series,
Dual channel
Up to 128GB
4, 8, 16,
32GB
4, 8, 16,
32GB
4, 8, 16,
32GB
4, 8, 16,
32GB
4, 8, 16,
32GB
4, 8, 16,
32GB
4, 8, 16,
32GB
4, 8, 16,
32GB
Core i9 7900X/ i7 7800X series,
Quad channel
Up to 256GB
* Please note that 32GB is supported by Core i9 10980XE/10940X/10920X/10900X series processors only.
Towards the CPU
DIMMB1 (Gray Slot)
DIMMA1 (Gray Slot)
DIMMA2 (Black Slot)
DIMMB2 (Black Slot)
Towards the CPU
DIMMD1 (Gray Slot)
DIMMC1 (Gray Slot)
DIMMC2 (Black Slot)
DIMMD2 (Black Slot)