The Lexar Gold Series Professional 640GB CFexpress 4.0 Type-A Memory Card costs $0.5937/GB while the SanDisk 512GB Extreme microSDXC UHS-I/U3 A2 Micro SD Card with Adapter, Speed Up to 190MB/s (SDSQXAV-512G-GN6MA) costs $0.1640/GB. SanDisk 512GB Extreme microSDXC UHS-I/U3 A2 Micro SD Card with Adapter, Speed Up to 190MB/s (SDSQXAV-512G-GN6MA) offers 72% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Lexar Gold Series Professional 640GB CFexpress 4.0 Type-A Memory Card vs SanDisk 512GB Extreme microSDXC UHS-I/U3 A2 Micro SD Card with Adapter, Speed Up to 190MB/s (SDSQXAV-512G-GN6MA) — Which Is Better Value?
Specification Comparison
| Spec | Lexar Gold Series Professional 640GB CFexpress 4.0 Type-A Memory Card | SanDisk 512GB Extreme microSDXC UHS-I/U3 A2 Micro SD Card with Adapter, Speed Up to 190MB/s (SDSQXAV-512G-GN6MA) |
|---|---|---|
| Brand | Lexar | SanDisk |
| Capacity | 640GB | 512GB |
| $/GB | $0.5937 | $0.1640 |
| Price | $379.99 | $83.99 |
| Retailer | Newegg | Newegg |
| Category | SD Cards | SD Cards |
| Subcategory | sd | micro-sd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the SanDisk 512GB Extreme microSDXC UHS-I/U3 A2 Micro SD Card with Adapter, Speed Up to 190MB/s (SDSQXAV-512G-GN6MA) offers better value at $0.1640//GB compared to the Lexar Gold Series Professional 640GB CFexpress 4.0 Type-A Memory Card at $0.5937//GB — that's roughly 72% less per gigabyte.
The best deal for the SanDisk 512GB Extreme microSDXC UHS-I/U3 A2 Micro SD Card with Adapter, Speed Up to 190MB/s (SDSQXAV-512G-GN6MA) is $83.99 at Newegg, while the Lexar Gold Series Professional 640GB CFexpress 4.0 Type-A Memory Card starts at $379.99 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Lexar Gold Series Professional 640GB CFexpress 4.0 Type-A Memory Card and SanDisk 512GB Extreme microSDXC UHS-I/U3 A2 Micro SD Card with Adapter, Speed Up to 190MB/s (SDSQXAV-512G-GN6MA) product page for detailed specifications and price history.
Frequently Asked Questions
Is Lexar Gold Series Professional 640GB CFexpress 4.0 Type-A Memory Card or SanDisk 512GB Extreme microSDXC UHS-I/U3 A2 Micro SD Card with Adapter, Speed Up to 190MB/s (SDSQXAV-512G-GN6MA) a better deal?
As of May 2026, SanDisk 512GB Extreme microSDXC UHS-I/U3 A2 Micro SD Card with Adapter, Speed Up to 190MB/s (SDSQXAV-512G-GN6MA) offers better value at $0.1640//GB compared to Lexar Gold Series Professional 640GB CFexpress 4.0 Type-A Memory Card at $0.5937//GB. That is approximately 72% better value per gigabyte.
What is the price per GB of Lexar Gold Series Professional 640GB CFexpress 4.0 Type-A Memory Card?
The Lexar Gold Series Professional 640GB CFexpress 4.0 Type-A Memory Card is currently priced at $0.5937/GB ($379.99 for 640GB) at Newegg.
Where can I buy SanDisk 512GB Extreme microSDXC UHS-I/U3 A2 Micro SD Card with Adapter, Speed Up to 190MB/s (SDSQXAV-512G-GN6MA) for the cheapest price?
The cheapest price for the SanDisk 512GB Extreme microSDXC UHS-I/U3 A2 Micro SD Card with Adapter, Speed Up to 190MB/s (SDSQXAV-512G-GN6MA) is $83.99 at Newegg, which works out to $0.1640/GB.