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Which 1TB SSD fits your system better?

Start with the dimensions and cooling arrangement of your exact M.2 slot. The UD90's manufacturer lists a 3.5 mm module profile; the exact Lexar part is specified with a built-in heatsink and a 9.7 mm total height. Lexar's 1TB sheet lists higher sequential speed ceilings, but no controlled head-to-head result here establishes a faster drive in your workload.

Published by Pickoryx · Published 2026-10-14

Source checked 2026-10-14 20:10 UTC

Products compared

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The buying question

Will either drive fit the buyer's M.2 slot and cooling setup, and how should the two manufacturers' 1TB speed ratings be interpreted?

The UD90's listed module is lower-profile, while the exact Lexar SKU is sold with a manufacturer-specified heatsink; the Lexar also lists higher sequential speed ceilings, but those are not head-to-head test results.

Quick verdict

When to skip: You cannot confirm the slot's interface, physical clearance, or required heat-dissipation setup before purchase.
When the recommendation changes
  • The host's documented M.2 size, cooling, interface, or controller limits rule out one configuration.
  • You need verified workload performance rather than vendor maximum ratings.

The differences that matter

Physical Fit And Heatsink Clearance

Silicon Power UD90 1TB (SP01KGBP44UD9005)

SP01KGBP44UD9005 is a 1TB UD90 part listed at 22.0 × 80.0 × 3.5 mm; the opened specification does not state whether a separate heatsink is included.[1]

Lexar NM790 1TB with Heatsink (LNM790X001T-RN9NU)

LNM790X001T-RN9NU is the North American 1TB NM790 with LPAH200 heatsink, listed at 80 × 24 × 9.7 mm.[2]

What this changes: The exact installed dimensions and the host's cooling requirements determine fit. A low-profile dimension does not prove no extra cooling is needed, and the Lexar heatsink's removability is not established.[1, 2, 3]

The better fit depends on your priorities

Capacity Specific Ratings And Host Limits

Silicon Power UD90 1TB (SP01KGBP44UD9005)

The 1TB SP01KGBP44UD9005 is specified at up to 5,000 MB/s sequential read and 4,800 MB/s sequential write over PCIe Gen4 x4; Silicon Power says results vary by system, hardware, software, interface mode and capacity. It also lists NVMe 1.4 and HMB.[1]

Lexar NM790 1TB with Heatsink (LNM790X001T-RN9NU)

The 1TB LNM790X001T-RN9NU is specified at up to 7,400 MB/s sequential read and 6,500 MB/s sequential write over PCIe Gen4 x4 and lists HMB 3.0; Lexar says actual performance may vary.[2]

What this changes: Published maxima are not actual workload results. Sony's PS5 documentation recommends at least 5,500 MB/s sequential read, does not support HMB and cautions that some HMB drives may perform slower than expected; its specifications do not guarantee any third-party drive's operation.[1, 2, 3]

The available evidence does not establish a winner

Best for your routine

A device with tight M.2 clearance where the owner has verified that the lower-profile UD90 configuration meets the device's cooling requirements.

Best fit: Silicon Power UD90 1TB (SP01KGBP44UD9005)

Based on listed features, not comparative testing.

The manufacturer lists the UD90 at 3.5 mm high, compared with the Lexar assembly's listed 9.7 mm height. Confirm the complete slot, screw, cover and cooling requirements before choosing.

View Silicon Power UD90 1TB (SP01KGBP44UD9005) on AmazonPaid link

A device whose M.2 bay supports the Lexar's full heatsink dimensions and where the buyer wants this exact supplied heatsink configuration.

Best fit: Lexar NM790 1TB with Heatsink (LNM790X001T-RN9NU)

Based on listed features, not comparative testing.

The North American part sheet identifies the 1TB Lexar SKU with an LPAH200 heatsink and specifies its assembled dimensions.

View Lexar NM790 1TB with Heatsink (LNM790X001T-RN9NU) on AmazonPaid link

Value and trade-offs

One or both observed offers have eligibility conditions, so no unrestricted price difference is shown.

Compare the current offers in the product cards against the installation features you will use; do not infer a lasting value advantage from a single price observation.

There is not enough verified price history here to recommend buying now or waiting.

Limitations

  • No independent controlled head-to-head test or workload-specific measurements were opened; vendor maximum ratings do not establish realized transfer speed, latency, gaming load times, or sustained performance.
  • The Silicon Power page lists the exact UD90 part's dimensions but does not establish whether the tracked Amazon configuration includes a separate heatsink; do not infer absence from that omission.
  • The Lexar sheet identifies its North American part number and UPC, but does not name the Amazon ASIN. The live catalog product title and part number match that manufacturer record.
  • Host compatibility depends on the exact M.2 slot, interface, clearance and cooling arrangement. Sony's general PS5 requirements and caveats do not certify either exact SKU.
  • No long-term reliability comparison was established.

Questions shoppers ask

Do the higher Lexar speed ratings mean it will be faster in my computer?

Not by themselves. Lexar's 1TB sheet lists higher maximum sequential read/write figures, while Silicon Power lists lower maximum figures for its 1TB part. The manufacturers caution that results vary with system and interface, and no controlled comparison under your workload was reviewed.

Does either manufacturer's specification guarantee PS5 compatibility?

No. Sony lists a supported interface, capacity, form factor and cooling-size envelope, but says it cannot guarantee every third-party drive meeting those specifications will work. Sony also notes that PS5 does not support HMB and that some HMB drives may run slower than expected; both drive makers list HMB support. Confirm the exact installation and model details before buying.

Methodology and sources

The assigned 1TB part numbers were checked against manufacturer documents. Dimensions and capacity-specific vendor speed ceilings were compared, then read against Sony's general PS5 host guidance where relevant. No benchmark was performed.

AI-assisted research and writing from manufacturer and official support documents; neither SSD was physically tested.

View 3 sources
  1. 1.SP UD90 2280 PCIe Gen4 x4 NVMe SSDSilicon Power · Official specifications · Source checked 2026-10-14 20:10 UTC
    Evidence used on this page
    • Product specification table, exact 1TB row and part number SP01KGBP44UD9005; dimensions, interface and system requirement rows; performance variation note.: The manufacturer identifies the exact 1TB part number and lists its 22.0 × 80.0 × 3.5 mm dimensions, PCIe Gen4 x4 interface, up-to 5000/4800 MB/s read/write figures and M.2/NVMe host requirement. The same page says performance varies by system, hardware, software, interface mode and capacity. It does not establish whether the exact retail configuration includes a separate heatsink.
  2. 2.Lexar NM790 with Heatsink Setup SheetLexar · Official specifications · Source checked 2026-10-14 20:10 UTC
    Evidence used on this page
    • Specifications, pp. 1–2: 1TB capacities, speeds, dimensions and North America ordering record; part LNM790X001T-RN9NU and UPC 843367131488.: The manufacturer sheet identifies the North American 1TB NM790 with LPAH200 heatsink as part LNM790X001T-RN9NU, UPC 843367131488. It specifies PCIe Gen4 x4, M.2 2280, 80 × 24 × 9.7 mm dimensions and up-to 7400/6500 MB/s 1TB read/write ratings; it labels speed claims as based on internal testing and says actual performance may vary.
  3. 3.How to add an M.2 SSD to a PS5 consoleSony Interactive Entertainment · Official support · Source checked 2026-10-14 20:10 UTC
    Evidence used on this page
    • PS5 M.2 requirements and notes: interface/capacity/form factor/size/read-speed recommendation, HMB and compatibility caveats.: Sony lists PS5 M.2 requirements including PCIe Gen4x4 NVMe, 250GB–8TB, 2280 among accepted forms, width up to 25mm and thickness up to 11.25mm; it recommends at least 5500 MB/s read but says this is not a compatibility guarantee. It says PS5 does not support HMB, some HMB drives may run slower than expected, and not every drive meeting the listed specifications is guaranteed to work.