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Green printed circuit board with black memory chips and gold edge connectors

SK hynix

SK hynix HMT41GU7AFR8C-RD 8GB DDR3-1866 ECC CL13 1.50V Server Memory

SKU CH-5402-VX7JG

8 GB DDR3-1866 ECC unbuffered server memory module running at 1.50 V with CL13 latency

  • Total capacity8 GB
  • Rated speedDDR3 1866 (PC3 14900)
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • 8 GB capacity for server workloads
  • DDR3-1866 speed rated at PC3-14900
  • ECC protection detects and corrects data errors
  • CL13 latency at 1.50 V operation
  • Unbuffered design for direct memory access

8GB DDR3-1866 ECC module for servers

This 8GB DDR3-1866 module is built for server systems that require error-correcting memory. It uses unbuffered ECC chips to detect and correct single-bit data errors. The module runs at a standard 1.50V and carries a CAS latency of 13 cycles. It suits administrators upgrading or maintaining compatible DDR3 platforms.

DDR3-1866 speed and unbuffered ECC limits

The DDR3-1866 interface (PC3-14900) sets the maximum data rate this module can deliver. Unbuffered ECC operation means the memory controller drives the chips directly without a register buffer. This design limits the total electrical load per channel compared to registered DIMMs. Systems must support unbuffered ECC at this speed to use the module correctly.

Check DDR3 slot type and ECC support first

Verify that your motherboard accepts DDR3 unbuffered ECC UDIMMs before ordering. The board must explicitly support ECC functionality and the 1.50V operating voltage. Confirm the maximum memory speed per slot matches or exceeds 1866 MT/s. Mixing this module with non-ECC or registered memory will prevent the system from booting.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $25.99
Cheaper than about 92% of the 6,523 comparable items (median $188.99).
Total capacity 8 GB
Lower than about 80% of the 6,064 comparable items (median 32 GB).
Price per GB $3.25 per GB
Cheaper than about 87% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameHynix
Model nameHMT41GU7AFR8C-RD
Total capacity8 GB
Performance
Rated speedDDR3 1866 (PC3 14900)
Memory
ECC supportYes
Buffer typeUnbuffered
Power
Rated voltage1.5 V

Questions about this item

Should I pick the 8 GB DDR3-1866 module or look for a different capacity?

This module provides 8 GB at DDR3-1866 with CL13 latency and 1.50 V operation. Choose it when your server board has free unbuffered ECC slots and you need exactly 8 GB per slot.

What does the DDR3-1866 (PC3-14900) rating deliver inside a server?

It runs at 1866 MT/s with a peak bandwidth of PC3-14900, using CL13 timing at 1.50 V. Real-world throughput depends on your platform's memory controller and channel population.

Is this an unbuffered ECC DDR3 DIMM and what does that limit?

Yes, it is an unbuffered ECC DDR3 DIMM (1Gx72). It works only in platforms that accept unbuffered ECC DDR3; registered or load-reduced slots will not support it.

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