The WD_BLACK 4TB SN7100X NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,250 MB/s read, 6,900 MB/s write, 3D NAND, Gaming Storage (WDS400T1X0E) costs $0.1698/GB while the SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) costs $0.0850/GB. SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) offers 50% better value per gigabyte as of July 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
WD_BLACK 4TB SN7100X NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,250 MB/s read, 6,900 MB/s write, 3D NAND, Gaming Storage (WDS400T1X0E) vs SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) — Which Is Better Value?
Specification Comparison
| Spec | WD_BLACK 4TB SN7100X NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,250 MB/s read, 6,900 MB/s write, 3D NAND, Gaming Storage (WDS400T1X0E) | SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) |
|---|---|---|
| Brand | Western Digital | SP Silicon Power |
| Capacity | 4TB | 4 TB |
| $/GB | $0.1698 | $0.0850 |
| Price | $679.00 | $339.97 |
| Retailer | Newegg | Amazon |
| Category | SSDs & NVMe Drives | SSDs & NVMe Drives |
| Subcategory | nvme | ssd |
Price Across Retailers
WD_BLACK 4TB SN7100X NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,250 MB/s read, 6,900 MB/s write, 3D NAND, Gaming Storage (WDS400T1X0E)
SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25)
Which Should You Buy?
Based on current pricing data, the SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) offers better value at $0.0850//GB compared to the WD_BLACK 4TB SN7100X NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,250 MB/s read, 6,900 MB/s write, 3D NAND, Gaming Storage (WDS400T1X0E) at $0.1698//GB — that's roughly 50% less per gigabyte.
The best deal for the SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) is $339.97 at Amazon, while the WD_BLACK 4TB SN7100X NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,250 MB/s read, 6,900 MB/s write, 3D NAND, Gaming Storage (WDS400T1X0E) starts at $679.00 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each WD_BLACK 4TB SN7100X NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,250 MB/s read, 6,900 MB/s write, 3D NAND, Gaming Storage (WDS400T1X0E) and SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) product page for detailed specifications and price history.
Frequently Asked Questions
Is WD_BLACK 4TB SN7100X NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,250 MB/s read, 6,900 MB/s write, 3D NAND, Gaming Storage (WDS400T1X0E) or SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) a better deal?
As of July 2026, SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) offers better value at $0.0850//GB compared to WD_BLACK 4TB SN7100X NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,250 MB/s read, 6,900 MB/s write, 3D NAND, Gaming Storage (WDS400T1X0E) at $0.1698//GB. That is approximately 50% better value per gigabyte.
What is the price per GB of WD_BLACK 4TB SN7100X NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,250 MB/s read, 6,900 MB/s write, 3D NAND, Gaming Storage (WDS400T1X0E)?
The WD_BLACK 4TB SN7100X NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,250 MB/s read, 6,900 MB/s write, 3D NAND, Gaming Storage (WDS400T1X0E) is currently priced at $0.1698/GB ($679.00 for 4TB) at Newegg.
Where can I buy SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) for the cheapest price?
The cheapest price for the SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) is $339.97 at Amazon, which works out to $0.0850/GB.