Replacement for 661-6503: Drop-In Alternatives We Stock
Looking for a replacement for the 661-6503 (661-6503 - Apple 4GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 204-Pin SoDIMM Dual Rank Memory Module)? Pro Disk Network ships 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 661-6503
| SKU | 661-6503 |
|---|---|
| Product | 661-6503 - Apple 4GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 204-Pin SoDIMM Dual Rank Memory Module |
| Current price | $128.00 |
| Stock status | In Stock |
| Detail page | View 661-6503 › |
Drop-in replacements for 661-6503
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.
661-7883 - Apple 4GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 204-Pin SODIMM Single Rank Memory Module for iMac 27-Inch
SKU: 661-7883
Price: $116.63
661-7021 - Apple 4GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 204-Pin SODIMM 1.35V Low VoltageMemory Module
SKU: 661-7021
Price: $116.63
661-7161 - Apple 4GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 240-Pin DIMM Dual Rank Memory Module
SKU: 661-7161
Price: $116.63
661-6637 - Apple 4GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 204-Pin SoDIMM Dual Rank Memory Module
SKU: 661-6637
Price: $128.00
661-7510 - Apple 4GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 204-Pin SoDIMM 1.35V Low Voltage Memory Module for iMac 21.5
SKU: 661-7510
Price: $156.46
661-7105 - Apple 4GB DDR3-1600MHz PC3-12800 204-Pin SDRAM Memory Module for iMac A1418
SKU: 661-7105
Price: $128.00
661-7020 - Apple 2GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 240-Pin DIMM Single Rank Memory Module
SKU: 661-7020
Price: $118.67
661-6502 - Apple 2GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 204-Pin SoDIMM Dual Rank Memory Module
SKU: 661-6502
Price: $145.08
661-7419 - Apple 2GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 204-Pin SoDIMM Dual Rank Memory Module
SKU: 661-7419
Price: $145.08
661-6636 - Apple 2GB DDR3-1600MHz PC3-12800 non-ECC Unbuffered CL11 204-Pin SoDIMM Dual Rank Memory Module
SKU: 661-6636
Price: $145.08
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.