The WD - BLACK SN850X 8TB Internal SSD PCIe Gen 4 x4 NVMe costs $0.3000/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 $0.0875/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 71% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
WD - BLACK SN850X 8TB Internal SSD PCIe Gen 4 x4 NVMe 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?
WD - BLACK SN850X 8TB Internal SSD PCIe Gen 4 x4 NVMe
Specification Comparison
| Spec | WD - BLACK SN850X 8TB Internal SSD PCIe Gen 4 x4 NVMe | 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 | 8 TB | 4 TB |
| $/GB | $0.3000 | $0.0875 |
| Price | $2399.99 | $349.97 |
| Retailer | Best Buy | Amazon |
| Category | SSDs & NVMe Drives | SSDs & NVMe Drives |
| Subcategory | nvme | ssd |
Price Across Retailers
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 $0.0875//GB compared to the WD - BLACK SN850X 8TB Internal SSD PCIe Gen 4 x4 NVMe at $0.3000//GB — that's roughly 71% 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 $349.97 at Amazon, while the WD - BLACK SN850X 8TB Internal SSD PCIe Gen 4 x4 NVMe starts at $2399.99 at Best Buy.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each WD - BLACK SN850X 8TB Internal SSD PCIe Gen 4 x4 NVMe 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 SN850X 8TB Internal SSD PCIe Gen 4 x4 NVMe 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 May 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 $0.0875//GB compared to WD - BLACK SN850X 8TB Internal SSD PCIe Gen 4 x4 NVMe at $0.3000//GB. That is approximately 71% better value per gigabyte.
What is the price per GB of WD - BLACK SN850X 8TB Internal SSD PCIe Gen 4 x4 NVMe?
The WD - BLACK SN850X 8TB Internal SSD PCIe Gen 4 x4 NVMe is currently priced at $0.3000/GB ($2399.99 for 8 TB) at Best Buy.
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 $349.97 at Amazon, which works out to $0.0875/GB.