Sun part number 540-7954 identifies the 540-7954 - Sun 4GB DDR2-667MHz PC2-5300 ECC Fully Buffered CL5 240-Pin DIMM Dual Rank Memory Module, an enterprise-grade Server Memory unit appropriate for data-center, server-room, and workstation deployment. Technical specifications include capacity of 4 GB, pc standard of PC2-5300, number of sticks of 1, frequency of 667 MHz, connector of 240-pin, memory class of ECC, features of Dual-Rank. Typical workloads include VMware vSphere VM host memory, Kubernetes worker-node memory pool, in-memory database (Redis, Memcached, SAP HANA), and SAS / Splunk analytic workloads requiring large RAM footprint. Pro Disk Network supplies the 540-7954 to US business buyers. Stocked units ship same-day on in-stock orders placed before 3pm ET. Pro Disk Network applies a 90-day functional warranty. Free US ground shipping on orders over $150; same-day expedited (UPS Next Day Air, FedEx Priority) available at checkout.
The 540-7954 is a Sun server memory component with capacity 4 GB, pc standard PC2-5300, number of sticks 1. Pro Disk Network sells the 540-7954 for $113.93 with same-day US shipping and a 30-day return guarantee.
Reviewed By
Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the 540-7954 are shown on this page.
Trust Signals
US-based LLC — 7345 W Sand Lake Rd, STE 210, Office 3208, Orlando, FL 32819
Same-Day US Shipping — orders before 3pm ET ship today via UPS
30-Day Returns — pre-paid label on DOA and defective items
Quick Answer: What servers is the 540-7954 compatible with?
The 540-7954 is a Sun server memory module. Confirm DIMM rank, voltage, and speed against the target server's supported memory list before deployment - mixed configurations may downclock to the slowest installed module. For server-specific population diagrams, email sales@prodisknetwork.com with your server serial number.
How fast does the 540-7954 ship?
If in stock, the 540-7954 ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
The 540-7954 is deployed by US enterprises, MSPs, government, and education customers across multiple infrastructure scenarios. Below are the most common deployment patterns Pro Disk Network sees in real-world orders.
VMware Cluster Memory — Per-host memory expansion for vSphere ESXi hosts. Match DIMM rank and speed across all sockets to keep memory channels balanced.
In-Memory Database — SAP HANA, Redis Enterprise, Apache Ignite, Aerospike — workloads that scale linearly with DRAM capacity.
Hyper-V Cluster Node — Windows Server 2019/2022 Hyper-V hosts with Storage Spaces Direct. Dynamic memory allocation makes higher-density DIMMs cost-effective.
AI / ML Training — PyTorch and TensorFlow workloads benefit from large host memory pools for dataset preprocessing and CPU-side feature engineering.
What is the 540-7954?
The 540-7954 is a Sun server memory module with capacity 4 GB and pc standard PC2-5300, manufactured by Sun. Pro Disk Network ships this part new and certified-refurbished from our US warehouse with same-day dispatch on orders placed before 3 PM ET, backed by a 30-day return guarantee.
Pros & Cons of 540-7954
Pros
RDIMM / LRDIMM clearly labelled for population-rule clarity
Cons
Server-grade DDR module — does not work in consumer desktops
Buffered (RDIMM) modules require server motherboards
Confirm voltage and channel rules before mixed-density installs
Frequently Asked Questions about 540-7954
Is the 540-7954 a genuine Sun part?
Yes. Pro Disk Network sources every 540-7954 as factory-original Sun inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned Sun servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
What servers is the 540-7954 compatible with?
The 540-7954 is a Sun server memory module. Confirm DIMM rank, voltage, and speed against the target server's supported memory list before deployment - mixed configurations may downclock to the slowest installed module. For server-specific population diagrams, email sales@prodisknetwork.com with your server serial number.
How fast does the 540-7954 ship?
If in stock, the 540-7954 ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
What is the warranty on the 540-7954?
New 540-7954 units carry the full Sun manufacturer warranty (typically 1 to 5 years depending on product line). Refurbished and bulk-OEM units include a Pro Disk Network advance-replacement warranty (90 days refurbished). DOA replacement is free within 30 days of receipt.
Do you offer bulk pricing for the 540-7954?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Other parts that share the 540 series prefix — useful when sourcing matched lots, hot-spare pools, or capacity-tier expansions.
540-7903 — 540-7903 - Sun 300GB 10000RPM SAS 6GB/s Hot-Pluggable 16MB Cache 2.5-inch Hard Drive — $683.88
540-7903-01 — 540-7903-01 Sun 300GB 10000RPM SAS 6GB/s 16MB Cache Hot-Pluggable 2.5-inch Hard Drive — $683.88
540-7903-02 — 540-7903-02 - Sun 300GB 10000RPM SAS 6GB/s Hot-Pluggable 16MB Cache 2.5-inch Hard Drive — $683.88
540-7907 — 540-7907 - Sun 8GB Kit (2 X 4GB) DDR2-667MHz PC2-5300 ECC Registered CL5 240-Pin DIMM Single Rank Memory — $371.50
540-7908 — 540-7908 - Sun 1.6GHz 8-Core CPU System Board (Motherboard) for T5240 — $1,211.37
540-7910 — 540-7910 - Sun 1TB 7200RPM SATA 3GB/s 32MB Cache 3.5-inch Hard Drive — $344.33
540-7910-01 — 540-7910-01 - Sun 1TB 7200RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive — $244.55
540-7910-02 — 540-7910-02 - Sun 1TB 7200RPM SATA 3GB/s 32MB Cache 3.5-inch Hard Drive — $344.33
540-7934 — 540-7934 - Sun System Board (Motherboard) Assembly with 8-Core 1.4GHz CPU for SPARC Enterprise T5240 — $1,609.26
540-7938 — 540-7938 - Sun System Board (Motherboard) 4-Core 1.2GHz CPU for SPARC Enterprise T5120 — $1,255.58
540-7939 — 540-7939 - Sun System Board (Motherboard) 6-Core 1.2GHz CPU for SPARC Enterprise T5240 — $608.42
540-7952 — 540-7952 - Sun System Board (Motherboard) for X4240 — $205.26
Pro Disk Network Buyer’s Guide: Server Memory
Compatibility: Rank, Density, and Channel Population Rules
For server memory, three numbers dominate compatibility: rank, density, and channel population. Mixing rank or density in the same channel forces the memory controller to fall back to the lowest-common-denominator speed and timings, sometimes by 200-400 MHz, which wastes the upgrade you just paid for. Before installing the 540-7954, run the platform's memory configuration utility (Dell DSET, HPE iLO Memory tab, Lenovo XCC Memory page) to identify what's already populated.
Pricing Strategy: New, Bulk, or Refurbished
For production tier-1 databases (SAP HANA, Oracle Exadata-equivalent, SQL Server Always On), use new sealed OEM units only. For VDI hosts, hyperconverged clusters, and general-purpose virtualisation, bulk-OEM is the cost-optimal choice. For development environments, lab gear, and capacity expansion on aging hardware, refurbished is appropriate — the price savings are 60-75% versus new.