Onlogic HX511 Product Manual page 20

for PCIe Gen 3 x4, PCIe Gen 3 x2, PCIe Gen 4 x4, SATA Gen I (1.5Gbps), SATA Gen II (3.0Gbps), and
SATA Gen III (6.0Gbps) devices.
A full pinout table for this expansion slot is provided in Appendix E
SO-DIMM1 & SO-DIMM2
The Helix 511 has two onboard DDR5 SO-DIMM slots with the following specifications:
Maximum Capacity: DDR5-4800 64GB with two 32GB SO-DIMM Modules
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Channel configuration: 1 DIMM Per Channel (DPC) - 2 Channels
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No ECC Support
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BIOS EEPROM
If the BIOS needs to be updated, please refer to Appendix C for reflashing instructions.
CMOS Clear Button
A board mounted button is used to clear the BIOS settings of the Helix 511.
RTC battery header
The RTC (Real Time Clock) battery on the Helix 511 is used to retain BIOS CMOS settings and
maintain the real-time clock for the system. If the RTC battery is low, BIOS settings will not be retained
and you may receive an alert in the operating system. The cabled RTC battery should be replaced with
a Maxell CR2032-WK11 (or UL listed equivalent). An equivalent battery shall use a Hirose
DF13-2S-1.25c connector to mate with the on-board connector.
Aux 12V/5V Header
The Helix 511 has a power header that can support up to 2A of 5V and 12V power. This header is
designed for internal expansion cards that require additional power above what is provided by the
expansion slots. This header is a 2.5mm Pitch 4-pin JST XH Connector, with the pinout shown below.
Pin Definition
1 5V DC
2 GND
3 GND
4 12V DC
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