This Sun 501-7791 delivers Server Memory functionality and is built for 24/7 enterprise duty cycles. Technical specifications include capacity of 1 GB, pc standard of PC2-4200, number of sticks of 1, frequency of 533 MHz, connector of 240-pin, memory class of ECC, Registered, features of Single-Rank. Workload fit covers virtual desktop infrastructure (Citrix, VMware Horizon), Java application servers (Tomcat, JBoss, WebLogic), enterprise data warehouse (Teradata, Vertica), and Hadoop/Spark cluster compute. Pro Disk Network supplies the 501-7791 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 501-7791 is a Sun server memory component with capacity 1 GB, pc standard PC2-4200, number of sticks 1. Pro Disk Network sells the 501-7791 for $157.56 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 501-7791 are shown on this page.
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30-Day Returns — pre-paid label on DOA and defective items
Quick Answer: What servers is the 501-7791 compatible with?
The 501-7791 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 501-7791 ship?
If in stock, the 501-7791 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 501-7791 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 501-7791?
The 501-7791 is a Sun server memory module with capacity 1 GB and pc standard PC2-4200, 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 501-7791
Pros
Recovery from no-POST errors when refreshing aging servers
Cons
Memory must match existing DIMM rank/density for channel balance
Higher density modules can drop overall channel speed
BIOS update may be required on older revisions
Frequently Asked Questions about 501-7791
Is the 501-7791 a genuine Sun part?
Yes. Pro Disk Network sources every 501-7791 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 501-7791 compatible with?
The 501-7791 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 501-7791 ship?
If in stock, the 501-7791 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 501-7791?
New 501-7791 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 501-7791?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Other parts that share the 501 series prefix — useful when sourcing matched lots, hot-spare pools, or capacity-tier expansions.
501-7713 — 501-7713 - Sun CPU / Memory Board 2x 2.1GHz USIV+ for V490 2100 / V890 2100 — $1,366.07
501-7715 — 501-7715 - Sun x16/x8 PCI-Express Riser Card for SPARC T5220 — $56.00
501-7717 — 501-7717 - Sun 1-Slot x16 PCI Express Riser for — $158.47
501-7719 — 501-7719 - Sun x8 / x8 XAUI Riser Card for Fire X4440 RoHS Y — $56.00
501-7720 — 501-7720 - Sun Connector Board for Fire X4440 — $105.13
501-7720-02 — 501-7720-02 - Sun X4440 Connector Board — $82.60
501-7721 — 501-7721 - Sun XAUI Riser Card for SPARC Enterprise T5120 Z5 — $124.79
501-7722 — 501-7722 - Sun System Board (Motherboard) for X4240 — $144.00
501-7725 — 501-7725 - Sun Pata DVD Connector Board Assembly for Fire X4150 — $97.11
501-7730 — 501-7730 - Sun 8 Disk Backplane for SPARC Enterprise T5220 RoHS-5 Compliant — $56.00
501-7743 — 501-7743 - Sun x16 PCI Express Riser Board for Fire x4150 — $158.09
501-7754 — 501-7754 - Sun System Board (Motherboard) for SPARC Enterprise T1000 — $1,200.80
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 501-7791, 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.