The KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... costs $0.0840/GB while the Intel Optane DC P5800X Series 400GB, 2.5' x 15mm, U.2, PCIe 4.0 x4, 3D XPoint Solid State Drive (SSD) SSDPF21Q400GB01 costs $2.8434/GB. KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... offers 97% better value per gigabyte as of June 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... vs Intel Optane DC P5800X Series 400GB, 2.5' x 15mm, U.2, PCIe 4.0 x4, 3D XPoint Solid State Drive (SSD) SSDPF21Q400GB01 — Which Is Better Value?
Specification Comparison
| Spec | KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... | Intel Optane DC P5800X Series 400GB, 2.5' x 15mm, U.2, PCIe 4.0 x4, 3D XPoint Solid State Drive (SSD) SSDPF21Q400GB01 |
|---|---|---|
| Brand | KingSpec | Intel |
| Capacity | 512GB | 400GB |
| $/GB | $0.0840 | $2.8434 |
| Price | $42.99 | $1137.35 |
| Retailer | Newegg | Newegg |
| Category | SSDs & NVMe Drives | SSDs & NVMe Drives |
| Subcategory | ssd | ssd |
Price Across Retailers
KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid...
Intel Optane DC P5800X Series 400GB, 2.5' x 15mm, U.2, PCIe 4.0 x4, 3D XPoint Solid State Drive (SSD) SSDPF21Q400GB01
Which Should You Buy?
Based on current pricing data, the KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... offers better value at $0.0840//GB compared to the Intel Optane DC P5800X Series 400GB, 2.5' x 15mm, U.2, PCIe 4.0 x4, 3D XPoint Solid State Drive (SSD) SSDPF21Q400GB01 at $2.8434//GB — that's roughly 97% less per gigabyte.
The best deal for the KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... is $42.99 at Newegg, while the Intel Optane DC P5800X Series 400GB, 2.5' x 15mm, U.2, PCIe 4.0 x4, 3D XPoint Solid State Drive (SSD) SSDPF21Q400GB01 starts at $1137.35 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... and Intel Optane DC P5800X Series 400GB, 2.5' x 15mm, U.2, PCIe 4.0 x4, 3D XPoint Solid State Drive (SSD) SSDPF21Q400GB01 product page for detailed specifications and price history.
Frequently Asked Questions
Is KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... or Intel Optane DC P5800X Series 400GB, 2.5' x 15mm, U.2, PCIe 4.0 x4, 3D XPoint Solid State Drive (SSD) SSDPF21Q400GB01 a better deal?
As of June 2026, KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... offers better value at $0.0840//GB compared to Intel Optane DC P5800X Series 400GB, 2.5' x 15mm, U.2, PCIe 4.0 x4, 3D XPoint Solid State Drive (SSD) SSDPF21Q400GB01 at $2.8434//GB. That is approximately 97% better value per gigabyte.
What is the price per GB of KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid...?
The KingSpec MomeStone 512GB Portable SSD up to 2000MB/s, Thumb Drive 20Gbps USB 3.2 Gen 2, Type-C USSD Mobile Solid U Disk USB Flash External Solid... is currently priced at $0.0840/GB ($42.99 for 512GB) at Newegg.
Where can I buy Intel Optane DC P5800X Series 400GB, 2.5' x 15mm, U.2, PCIe 4.0 x4, 3D XPoint Solid State Drive (SSD) SSDPF21Q400GB01 for the cheapest price?
The cheapest price for the Intel Optane DC P5800X Series 400GB, 2.5' x 15mm, U.2, PCIe 4.0 x4, 3D XPoint Solid State Drive (SSD) SSDPF21Q400GB01 is $1137.35 at Newegg, which works out to $2.8434/GB.