Alternative to 331-5639: Better-Value Equivalents in Stock
Comparing the 331-5639 (331-5639 - Dell 240-Watts Power Supply for OptiPlex 790 990 Sff) against alternatives? Pro Disk Network stocks 12 similar Dell parts that offer comparable performance at different price points. Each option below is in-stock, US-warehoused, and tested-and-certified before ship. Bulk pricing is available on quantities of 5+; B2B procurement can use Net 30 with PO.
About the 331-5639
| SKU | 331-5639 |
|---|---|
| Product | 331-5639 - Dell 240-Watts Power Supply for OptiPlex 790 990 Sff |
| Current price | $171.76 |
| Stock status | In Stock |
| Detail page | View 331-5639 › |
Alternatives to 331-5639
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.
311-5639 - Dell 512MB DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 240-Pin DIMM Memory Module
SKU: 311-5639
Price: $133.51
J61WF - Dell 240-Watts 100-240V ATX Power Supply for OptiPlex OptiPlex 3050 5050 7050
SKU: J61WF
Price: $165.79
0J61WF - Dell 240-Watts 100-240V ATX Power Supply for OptiPlex OptiPlex 3050 5050 7050
SKU: 0J61WF
Price: $165.79
H240ES-02 - Dell 240-Watts 100-240V ATX Power Supply for OptiPlex OptiPlex 3050 5050 7050
SKU: H240ES-02
Price: $189.47
D240E014L - Dell 240-Watts 100-240V ATX Power Supply for OptiPlex OptiPlex 3050 5050 7050
SKU: D240E014L
Price: $210.74
342-5639 - Dell 400GB Single-Level Cell (SLC) SAS 6GB/s Hot-pluggable 2.5-inch Solid State Drive for PowerEdge
SKU: 342-5639
Price: $2,546.08
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
How we pick alternatives
Every recommendation above was selected using these criteria:
- Spec parity — capacity, speed, port count, and form factor matched within a 10% tolerance
- Price spread — alternatives shown across the price range, so you can pick on budget
- Brand mix — both OEM-equivalent and trusted aftermarket, all certified
- Reliability data — preferred parts have failure rates below 1% in our 18-month return tracking
- In stock today — shipping today, not 4-6 weeks from now
Want a side-by-side spec comparison?
We can prepare a written comparison covering throughput, power draw, form factor and validated compatibility. Email sales@prodisknetwork.com or call +1 (407) 205-8454 — most quotes ship within 4 business hours.