Replacement for AT042AA: Drop-In Alternatives We Stock
Looking for a replacement for the AT042AA (AT042AA - HP ATI Radeon HD 4550 256MB DDR3 64-Bit PCI Express x16 Video Graphics Card)? 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 AT042AA
| SKU | AT042AA |
|---|---|
| Product | AT042AA - HP ATI Radeon HD 4550 256MB DDR3 64-Bit PCI Express x16 Video Graphics Card |
| Current price | $218.67 |
| Stock status | In Stock |
| Detail page | View AT042AA › |
Drop-in replacements for AT042AA
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.
538051-001 - HP ATI Radeon HD 4550 256MB DDR3 64-Bit PCI Express x16 Video Graphics Card
SKU: 538051-001
Price: $394.91
584217-001 - HP ATI Radeon HD 4550 512MB DDR3 64-Bit PCI Express x16 Video Graphics Card
SKU: 584217-001
Price: $143.07
SG764AA - HP ATI Radeon HD 4550 512MB DDR3 64-Bit PCI Express x16 Video Graphics Card
SKU: SG764AA
Price: $293.49
SG764AT - HP ATI Radeon HD 4550 512MB DDR3 64-Bit PCI Express x16 Video Graphics Card
SKU: SG764AT
Price: $293.49
KL750-69001 - HP ATI Radeon HD 3450 256MB DDR2 64-Bit Dual Link DVI-I/VGA/HDTV-out PCI Express 2.0 x16 Video Graphics Card
SKU: KL750-69001
Price: $133.71
461902-001 - HP ATI Radeon HD 2400 XT 256MB DDR2 64-Bit PCI Express x16 Video Graphics Card
SKU: 461902-001
Price: $231.97
KD060AA - HP ATI Radeon HD 2400 XT 256MB DDR2 64-Bit PCI Express x16 Video Graphics Card
SKU: KD060AA
Price: $352.04
647449-001 - HP ATI Radeon HD 6450 512MB GDDR3 64-Bit PCI Express 2.0 x16 Video Graphics Card
SKU: 647449-001
Price: $304.79
QM229AA - HP ATI Radeon HD 6450 512MB GDDR3 64-Bit PCI Express 2.0 x16 Video Graphics Card
SKU: QM229AA
Price: $304.79
634478-001 - HP ATI Radeon HD 6450 512MB GDDR3 64-Bit PCI Express 2.0 x16 Video Graphics Card
SKU: 634478-001
Price: $304.79
DY596AR - HP ATI Radeon X300 SE 128MB DDR 64-Bit PCI Express x16 Video Graphics Card
SKU: DY596AR
Price: $391.87
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.