Silicon Power vs Unirex SD Cards

Side-by-side price per gigabyte comparison across 14 products.

As of March 2026, Silicon Power averages $0.2781/GB across 8 products while Unirex averages $0.4149/GB across 6 products on BuyPerUnit. Silicon Power offers 33% better value per gigabyte for sd cards.

Silicon Power

Better Value

Avg $/GB$0.2781

Best $/GB$0.1378

Price Range$0.1378 – $0.5934

Products8

Cheapest Product

Silicon Power 1TB Superior microSDXC UHS-I (U3), V30 4K A1 Memory Card with Adapter (SP001TBSTXDV3V20SP)

1TB · $137.79 · newegg

Unirex

Avg $/GB$0.4149

Best $/GB$0.1873

Price Range$0.1873 – $0.6244

Products6

Cheapest Product

Unirex UMS645MUHS1 64GB microSDHC Card

64GB · $11.99 · newegg

Top Products Compared

Rank	Brand	Product	Capacity	$/GB	Price	Retailer
1	Silicon Power	Silicon Power 1TB Superior microSDXC UHS-I (U3), V30 4K A1 Memory Card with Adapter (SP001TBSTXDV3V20SP)	1TB	$0.1378	$137.79	newegg
1	Unirex	Unirex UMS645MUHS1 64GB microSDHC Card	64GB	$0.1873	$11.99	newegg
2	Silicon Power	Silicon Power 128GB Elite SDXC UHS-I/U1 Class 10 Memory Card, Speed Up to 85MB/s (SP128GBSDXAU1V10)	128GB	$0.1562	$19.99	newegg
2	Unirex	Unirex Full Size SD Card 64GB	64GB	$0.3123	$19.99	newegg
3	Silicon Power	Silicon Power 1TB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter	1TB	$0.1598	$159.79	newegg
3	Unirex	Unirex MSU325 32GB MicroSD Card	32GB	$0.3434	$10.99	newegg
4	Silicon Power	Silicon Power Elite microSDXC 256GB CL10 UHS-1 Full HD 100MB/sec Memory Card w/Adapter Modle	256GB	$0.2343	$59.99	newegg
4	Unirex	Unirex MSW325M 4-in-1 Usb/Micro USB Reader and SD Adapter (32GB)	32GB	$0.3975	$12.72	newegg
5	Silicon Power	Silicon Power 64GB Elite SDXC UHS-I/U1 Class 10 Memory Card , Speed Up to 85MB/s (SP064GBSDXAU1V10)	64GB	$0.2498	$15.99	newegg
5	Unirex	Unirex 16Gb Microsd Card With Sd Adapter, Msu165	16GB	$0.6244	$9.99	newegg

Which Should You Buy?

Based on current pricing data, Silicon Power offers better overall value for sd cards at an average of $0.2781/GB compared to Unirex's $0.4149/GB — that's roughly 33% less per gigabyte.

Silicon Power's best deal is the Silicon Power 1TB Superior microSDXC UHS-I (U3), V30 4K A1 Memory Card with Adapter (SP001TBSTXDV3V20SP) (1TB) at $0.1378/GB, while Unirex's cheapest option is the Unirex UMS645MUHS1 64GB microSDHC Card (64GB) at $0.1873/GB.

However, price per GB isn't everything — consider factors like warranty, performance specs, and your specific capacity needs. Check individual product pages for detailed specifications.

Frequently Asked Questions

Is Silicon Power or Unirex cheaper per GB for sd cards?

As of March 2026, Silicon Power averages $0.2781/GB compared to Unirex at $0.4149/GB. Silicon Power is approximately 33% cheaper per gigabyte on average.

How many Silicon Power and Unirex sd cards does BuyPerUnit track?

BuyPerUnit currently tracks 8 Silicon Power products and 6 Unirex products in the sd cards category, all ranked by price per gigabyte.

What is the cheapest Silicon Power sd card per GB?

The cheapest Silicon Power option is the Silicon Power 1TB Superior microSDXC UHS-I (U3), V30 4K A1 Memory Card with Adapter (SP001TBSTXDV3V20SP) at $0.1378/GB ($137.79 for 1TB).

What is the cheapest Unirex sd card per GB?

The cheapest Unirex option is the Unirex UMS645MUHS1 64GB microSDHC Card at $0.1873/GB ($11.99 for 64GB).

Explore More

All SD Cards Silicon Power SD Cards Unirex SD Cards

View all SD Cards