Alternative to MK643: Better-Value Equivalents in Stock
Comparing the MK643 (MK643 - Dell 750-Watts Power Supply for Precision 490 690) 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 MK643
| SKU | MK643 |
|---|---|
| Product | MK643 - Dell 750-Watts Power Supply for Precision 490 690 |
| Stock status | In Stock |
| Detail page | View MK643 › |
Alternatives to MK643
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.
HP-W7508F3 - Dell 750-Watts 100-240V ATX Power Supply for Precision 490 690
SKU: HP-W7508F3
Price: $134.74
MK463 - Dell 750-Watts 200-240V ATX Power Supply for Precision 490 690 WorkStation
SKU: MK463
Price: $138.95
H750P-00 - Dell 750-Watts 100-240V ATX Power Supply for Precision 490 690
SKU: H750P-00
Price: $147.37
Dell NSP-750AB A 750-Watts 200-240V ATX Power Supply for Precision 490 690 WorkStation
SKU: NSP-750AB-A
Price: $147.86
HP-W750BF3 - Dell 750-Watts 100-240V ATX Power Supply for Precision 490 690
SKU: HP-W750BF3
Price: $153.03
N750E-00 - Dell 750-Watts 100-240V Power Supply for Precision 390 490 690
SKU: N750E-00
Price: $160.00
HP-W7518F3 - Dell 750-Watts 100-240V Power Supply for Precision 390 490 690
SKU: HP-W7518F3
Price: $160.00
Dell/Alienware NPS-750AB-1 B 750-Watts 100-240V Power Supply for Precision 390 490 690
SKU: NPS-750AB-1-B
Price: $179.34
H750E-00 - Dell 750-Watts 100-240V Power Supply for Precision 390 490 690
SKU: H750E-00
Price: $187.37
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.