Replacement for 18N8R: Drop-In Alternatives We Stock
Looking for a replacement for the 18N8R (18N8R - Dell 305-Watts Mini Tower Power Supply for OptiPlex 580 760 960)? Pro Disk Network ships Dell 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 18N8R
| SKU | 18N8R |
|---|---|
| Product | 18N8R - Dell 305-Watts Mini Tower Power Supply for OptiPlex 580 760 960 |
| Stock status | In Stock |
| Detail page | View 18N8R › |
Drop-in replacements for 18N8R
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.
0P2721 - Dell 160-Watts ATX SFF Power Supply for Dimension 2400C 4600C and OptiPlex GX270 Mini-Tower and OptiPlex GX270 SFF Desktops
SKU: 0P2721
Price: $461.84
OP2721 - Dell 160-Watts ATX SFF Power Supply for Dimension 2400C 4600C and OptiPlex GX270 Mini-Tower and OptiPlex GX270 SFF Desktops
SKU: OP2721
Price: $461.84
P2721 - Dell 160-Watts ATX SFF Power Supply for Dimension 2400C 4600C and OptiPlex GX270 Mini-Tower and OptiPlex GX270 SFF Desktops
SKU: P2721
Price: $461.84
H9073 - Dell Assembly System Fan for Optiplex 320/ 320 Mini-Tower/ 740/ 740 Mini-Tower/ 745/ GX520 DesktopS
SKU: H9073
Price: $73.68
0H9073 - Dell Assembly System Fan for Optiplex 320/ 320 Mini-Tower/ 740/ 740 Mini-Tower/ 745/ GX520 DesktopS
SKU: 0H9073
Price: $106.49
GK929 - Dell 305-Watts 100-240V ATX Power Supply for OptiPlex 740, 745, 755 Tower
SKU: GK929
Price: $304.78
0GK929 - Dell 305-Watts 100-240V ATX Power Supply for OptiPlex 740, 745, 755 Tower
SKU: 0GK929
Price: $304.78
AC240EM-00 - Dell 240-Watts Power Supply for OptiPlex 5040 / 7040 / 9040 Mini Tower
SKU: AC240EM-00
Price: $143.39
0M1C3 - Dell 240-Watts Power Supply for OptiPlex 5040 / 7040 / 9040 Mini Tower
SKU: 0M1C3
Price: $149.47
0F233T - Dell 255-Watts 100-240V Mini Tower Power Supply for OptiPlex 760 960
SKU: 0F233T
Price: $165.79
F233T - Dell 255-Watts 100-240V Mini Tower Power Supply for OptiPlex 760 960
SKU: F233T
Price: $165.79
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.