This is a great budget workhorse for PCIe 3 systems, though it’s extremely slow for PCIe 4.

NVMe SSD prices have been gradually dropping, but we were still surprised to see the 1TB PNY CS2140 available for under $100. True, it was only five dollars less than that, but that’s still a great price for a good performing PCIe 3 SSD (it’s actually PCIe 4, but performs like a PCIe 3 drive–even over the faster bus). It even sports a 5-year warranty, though that’s offset somewhat by low TBW ratings. All told, this drive is an outstanding choice for anyone looking to snag a solid everyday SSD at a great price.

Design and features

The CS2140 is a PCIe 4 x4, M.2 2280, NVMe SSD employing a Phison PS5019-E19-35 controller to move data in and out of unspecified NAND. We researched the numbers on the chips to no avail and PNY wasn’t forthcoming.

Considering the performance, and that there were only two chips on one side of the PCB, with room for two more, we’d guess 130+ layer TLC. There’s no DRAM cache, and PNY confirmed that the drive is HMB (Host Memory Buffer), i.e. it uses some of your PC’s memory for primary cache. The performance in our long copies indicates that there’s NAND as secondary cache being assigned dynamically.

Hurdle overcome, the TBW ratings for the various capacities of the CS2140 are: 250GB/150TBW, 500GB/200TBW, 1TB/400TBW, 2TB/1200TBW. Normally, they scale evenly and we can simply say 150TBW per 250GB of capacity or some such. These are odd to say the least.

Regardless, considering the pricing, they’re reasonable, if comparatively low—very low, in the 500GB and 1TB variations. Keep in mind that most users won’t write even that much data in five years, and that reads are free. They put no wear on the drive.
Why is the TBW rating important?

The reason we fuss is that SSD warranties are limited by two factors. One is the time period, which is five years in this case. That’s great. The other is the amount of data that’s been written to the drive, which is commonly measured in terabytes, or yes, TBW.

For instance, if a drive is warrantied for five years but rated for 150TBW, and you’ve written 175 terabytes, the warranty is void, even if it’s been only three years. PNY should put this information where it’s easier to find.

The CS2140 is a very good performer. It’s PCIe 4, but fooled us initially as the results are very “PCIe 3-like”. You don’t get close to cutting edge numbers over PCIe 4, but one of the secrets in the industry is that seek times remain largely the same regardless of PCIe generation. Lightning fast seek times produce at least half the NVMe experience.

Regardless, we compared it to other drives using DRAM-less, host buffer memory drives operating over PCIe 3 as that’s what it performs like.

The PNY CS2140 is a faster reader than its two HBM competitors, but only the 2nd fastest writer.

The CS2140 was good, if not spectacular in our 48GB transfers shown below.

The PNY CS2140 easily bested the Atom 50, but couldn’t match the SN770’s time which was largely accrued via fantastic performance with small files. Many of the files in the various folders are duplicates.

Most load/save operations are very small and never take advantage of PCIe 4’s doubled throughput. Even programs that load/save larger (1GB to 10GB) chunks of data improve minimally with the newer PCIe bus.

Where you will really notice a difference is in very long copies, such as our 450GB write (shown below) where the increased bandwidth really has time to factor in.

The previous tests were done under Windows 10 64-bit running on a Core i7-5820K/Asus X99 Deluxe system with four 16GB Kingston 2666MHz DDR4 modules, a Zotac (Nvidia) GT 710 1GB x2 PCIe graphics card, and an Asmedia ASM3242 USB 3.2×2 card. It also contains a Gigabyte GC-Alpine Thunderbolt 3 card, and Softperfect Ramdisk 3.4.6 for the 48GB read and write tests. The results for the PNY were gathered on our AMD Ryzen 3700X PCIe 4 testbed using the same components.

Write performance will decrease as the drive fills up. Also, in rare cases, components may change for the worse. PNY says it might change NAND due to various factors but the drive will always maintain the performance on the package and other advertising. Our standard request with all drives is that, if, given similar hardware, they do not perform as well as our test unit, please let us know.


Unless you regularly write very large contiguous files, the PNY CS2140 is a great deal and a very good every day performer on older systems PCIe 3 systems. That the drive performs like a PCIe 3 drive over PCIe 4, and that PNY isn’t entirely forthright in displaying warranty information and component specifications, however, limits our enthusiasm.

This article was edited on 4/23/2022 to correct the reference to the CS2140 as a PCIe 3 drive. It’s PCIe 4. The middling PCIe 3-like performance during testing, even on our PCIe 4 testbed led us to assume otherwise. We apologize for the error.


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