🧠 SyncMAX SM256R368A‑653 – Technical Specifications

• Manufacturer: SyncMAX

• Model: SM256R368A‑653

• Kit Configuration: 2 × 256 MB RIMM modules = 512 MB total

• Memory Type: RDRAM (Rambus DRAM)

• Form Factor: 184‑pin RIMM with aluminum heat spreaders

• Speed Rating: PC600‑53 (600 MHz effective, ~53 ns latency)

• Error Checking: Non‑ECC (consumer-grade)

• Buffered/Registered: Unbuffered

• Voltage: 2.5 V

🔧 Module Details & Characteristics

• Module Capacity: 256 MB each

• Module Organization: 8 × 32 Mb DRAM chips = 256 MB

• Data Bandwidth: 1.6 GB/s per module (PC600 spec)

• Design Use: From consumer desktops (e.g., non-ECC Dell systems)

• Kit Requirement: Paired installation; continuity RIMMs (C‑RIMMs) needed for empty slots

🖥️ Compatible PC Systems

These modules are compatible with PC600 RDRAM-equipped consumer systems, particularly based on Intel's i820 chipset supporting non‑ECC configurations.

✅ Known OEM Systems:

• Dell Precision 340 (non-ECC PC600 variant)

• Dell consumer RDRAM desktops (Dimension XPS B‑series, etc.) with PC600 support

✅ Custom/Desktop Motherboards (RDRAM PC600 D820GBOfficial PC600 boardsASUSP3C‑2000Slot‑1, Pentium III with PC600 RDRAM supportMSIMS‑6332Early RDRAM PC600 motherboardABITSH6, TH7Enthusiast RDRAM boards supporting PC600❌ Not Compatible With:

• ECC-only or PC800/PC1066 RDRAM workstations (like Precision 340 ECC)

• DDR, DDR2, DDR3, or SDRAM-based systems

• Intel 850/850E chipset motherboards requiring faster RDRAM

🧩 Installation Notes:

• Must be installed in matched pairs

• Continuity RIMMs (C‑RIMMs) required in empty slots

• Generate significant heat—ensure adequate cooling