Replacement for 787864-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 787864-B21 (787864-B21 - HP 8GB PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM 1.2V Single-Rank Memory Module)? Pro Disk Network ships HP drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the 787864-B21
| SKU | 787864-B21 |
|---|---|
| Product | 787864-B21 - HP 8GB PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM 1.2V Single-Rank Memory Module |
| Current price | $342.22 |
| Stock status | In Stock |
| Detail page | View 787864-B21 › |
Drop-in replacements for 787864-B21
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
G8X27AV - HP 8GB Kit (2 X 4GB) PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM 1.2V Single-Rank Memory Module
SKU: G8X27AV
Price: $121.26
G8U32AV - HP 16GB Kit (2 X 8GB) PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM 1.2V Single-Rank Memory Module
SKU: G8U32AV
Price: $125.05
817546-081 - HP 8GB PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM Memory Module
SKU: 817546-081
Price: $147.28
YM5529 - HP 8GB PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM 1.2V Single-Rank Memory Module
SKU: YM5529
Price: $147.28
J9P82ATR-P - HP 8GB PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM 1.2V Single-Rank Memory Module
SKU: J9P82ATR-P
Price: $147.28
P0000745-001 - HP 8GB PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM 1.2V Single-Rank Memory Module
SKU: P0000745-001
Price: $147.28
752368-081U - HP 8GB PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM 1.2V Single-Rank Memory Module
SKU: 752368-081U
Price: $147.28
RP001232328 - HP 8GB PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM 1.2V Single-Rank Memory Module
SKU: RP001232328
Price: $147.28
817545-081 - HP 8GB PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM Memory Module
SKU: 817545-081
Price: $147.28
832109-001 - HP 8GB PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM Memory Module
SKU: 832109-001
Price: $147.28
VZ2904 - HP 8GB PC4-17000 DDR4-2133MHz ECC Registered CL15 RDIMM 1.2V Single-Rank Memory Module
SKU: VZ2904
Price: $147.28
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.