{"data":{"slug":"sandisk-optimus-gx-pro-850x","type":"ssd","brand":"Sandisk","name":"Optimus GX PRO 850X","aliases":["SANDISK Optimus GX PRO 850X","Optimus GX Pro 850X","WD_BLACK SN850X","WD Black SN850X","SN850X"],"release_date":"2022-08","url":"https://arkivo.dev/ssds/sandisk-optimus-gx-pro-850x","specs":{"series":"Optimus GX 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TLC","nand_layers":112},{"model_number":"SDSP81200TAN-000E0","model_numbers":["SDSP81200TAN-000E0","SDSP81200TAN","WDS200T2X0E"],"gtin":"619659231965","storage_gb":[2000],"heatsink":["bare"],"pcb_sides":"single_sided","seq_read_mbs":7300,"seq_write_mbs":6600,"random_read_iops":1200000,"random_write_iops":1100000,"endurance_tbw":1200,"power_consumption_read_w":7.5,"power_consumption_write_w":7,"power_consumption_sleep_mw":5,"dimensions_mm":{"length_mm":80,"width_mm":22,"height_mm":2.38},"weight_g":7.5,"in_the_box":["SANDISK Optimus GX PRO 850X NVMe SSD"],"dram_cache_gb":2,"launch_price_usd":289.99,"measured_max_temp_c":85,"measured_power_idle_mw":1124,"benchmark_3dmark_storage":3962,"nand_flash":"Sandisk BiCS5 TLC","nand_layers":112},{"model_number":"SDSP81400TAN-000E0","model_numbers":["SDSP81400TAN-000E0","SDSP81400TAN","WDS400T2X0E"],"gtin":"619659231958","storage_gb":[4000],"heatsink":["bare"],"pcb_sides":"double_sided","seq_read_mbs":7300,"seq_write_mbs":6600,"random_read_iops":1200000,"random_write_iops":1100000,"endurance_tbw":2400,"power_consumption_read_w":8,"power_consumption_write_w":7.2,"power_consumption_sleep_mw":5,"dimensions_mm":{"length_mm":80,"width_mm":22,"height_mm":3.88},"weight_g":8.6,"in_the_box":["SANDISK Optimus GX PRO 850X NVMe SSD"],"launch_price_usd":699.99,"nand_flash":"Sandisk BiCS5 TLC","nand_layers":112},{"model_number":"SDSP81800TAN-000E0","model_numbers":["SDSP81800TAN-000E0","SDSP81800TAN","WDS800T2X0E"],"gtin":"619659231941","storage_gb":[8000],"heatsink":["bare"],"pcb_sides":"double_sided","seq_read_mbs":7200,"seq_write_mbs":6600,"random_read_iops":1200000,"random_write_iops":1200000,"endurance_tbw":4800,"power_consumption_read_w":6.7,"power_consumption_write_w":8,"power_consumption_sleep_mw":5,"dimensions_mm":{"length_mm":80,"width_mm":22,"height_mm":3.88},"weight_g":8.6,"in_the_box":["SANDISK Optimus GX PRO 850X NVMe SSD"],"launch_price_usd":849.99,"launch_price_eur":953.99,"nand_flash":"Sandisk BiCS6 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TLC","nand_layers":112},{"model_number":"SDSP81200TAH-000E0","model_numbers":["SDSP81200TAH-000E0","SDSP81200TAH","WDS200T2XHE"],"gtin":"619659232009","storage_gb":[2000],"heatsink":["with_heatsink"],"pcb_sides":"single_sided","seq_read_mbs":7300,"seq_write_mbs":6600,"random_read_iops":1200000,"random_write_iops":1100000,"endurance_tbw":1200,"power_consumption_read_w":7.5,"power_consumption_write_w":7,"power_consumption_sleep_mw":5,"dimensions_mm":{"length_mm":80,"width_mm":23.4,"height_mm":8.9},"weight_g":24,"in_the_box":["SANDISK Optimus GX PRO 850X NVMe SSD"],"dram_cache_gb":2,"launch_price_usd":309.99,"measured_seq_read_mbs":7377,"measured_seq_write_mbs":6688,"measured_random_read_q1_mbs":86.74,"measured_random_write_q1_mbs":267.88,"nand_flash":"Sandisk BiCS5 TLC","nand_layers":112},{"model_number":"SDSP81400TAH-000E0","model_numbers":["SDSP81400TAH-000E0","SDSP81400TAH","WDS400T2XHE"],"gtin":"619659231996","storage_gb":[4000],"heatsink":["with_heatsink"],"pcb_sides":"double_sided","seq_read_mbs":7300,"seq_write_mbs":6600,"random_read_iops":1200000,"random_write_iops":1100000,"endurance_tbw":2400,"power_consumption_read_w":8,"power_consumption_write_w":7.2,"power_consumption_sleep_mw":5,"dimensions_mm":{"length_mm":80,"width_mm":24.46,"height_mm":10.31},"weight_g":30.4,"in_the_box":["SANDISK Optimus GX PRO 850X NVMe SSD"],"launch_price_eur":539.99,"nand_flash":"Sandisk BiCS5 TLC","nand_layers":112},{"model_number":"SDSP81800TAH-000E0","model_numbers":["SDSP81800TAH-000E0","SDSP81800TAH","WDS800T2XHE"],"gtin":"619659231989","storage_gb":[8000],"heatsink":["with_heatsink"],"pcb_sides":"double_sided","seq_read_mbs":7200,"seq_write_mbs":6600,"random_read_iops":1200000,"random_write_iops":1200000,"endurance_tbw":4800,"power_consumption_read_w":6.7,"power_consumption_write_w":8,"power_consumption_sleep_mw":5,"dimensions_mm":{"length_mm":80,"width_mm":24.46,"height_mm":10.31},"weight_g":30.4,"in_the_box":["SANDISK Optimus GX PRO 850X NVMe SSD"],"launch_price_usd":899.99,"nand_flash":"Sandisk BiCS6 TLC","nand_layers":162}],"sources":[{"url":"https://documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus-gx-pro/data-sheet-optimus-gx-pro-850x-internal-ssd.pdf","kind":"manufacturer_pdf","accessed":"2026-10-14","fields":["model_numbers","form_factor","storage_gb","interface","pcie_gen","pcie_lanes","nvme_version","nand_type","dram_cache","pcb_sides","seq_read_mbs","seq_write_mbs","random_read_iops","random_write_iops","power_consumption_read_w","power_consumption_write_w","power_consumption_sleep_mw","endurance_tbw","mtbf_h","warranty_years","security_features","software_name","operating_temperature_c","dimensions_mm","weight_g","spec_sheet_url","heatsink","variants"],"notes":{"model_numbers":"Bare drive models SDSP81100TAN, SDSP81200TAN, SDSP81400TAN and SDSP81800TAN","form_factor":"Form factor row reads M.2 2280-S3-M for 1TB and 2TB and M.2 2280-D5-M for 4TB and 8TB","storage_gb":"1GB = 1 billion bytes and 1TB = 1 trillion bytes. Capacities 1TB, 2TB, 4TB and 8TB","interface":"Interface row reads PCIe 4.0 x4 NVMe 1.4. Footnote 11: backwards compatible with PCIe 3.0 x4, 3.0 x2, 3.0 x1, 2.0 x4, 2.0 x2 and 2.0 x1","nvme_version":"Interface row reads PCIe 4.0 x4 NVMe 1.4","nand_type":"NAND row reads SANDISK TLC 3D NAND. The datasheet names the flash only as SANDISK BiCS TLC 3D NAND, with no generation","dram_cache":"DRAM cache row reads Yes. The datasheet gives no size","pcb_sides":"Module code in the form factor row: S means single-sided and D means double-sided. 1TB and 2TB are 2280-S3-M, 4TB and 8TB are 2280-D5-M","seq_read_mbs":"Up to 7,300 MB/s for 1TB, 2TB and 4TB and 7,200 MB/s for 8TB. Sequential read 1MB at queue depth 8, 1 thread. Internal testing, host not named","seq_write_mbs":"Up to 6,300 MB/s (1TB) and 6,600 MB/s (2TB, 4TB, 8TB). Queue depth 8, 1 thread. Internal testing, so inside the fast write cache","random_read_iops":"Random read 4KB up to 800K (1TB) and 1.2M (2TB, 4TB, 8TB). Queue depth 32, 16 threads. 1.2M is 1200000","random_write_iops":"Random write 4KB up to 1.1M (1TB, 2TB, 4TB) and 1.2M (8TB). Queue depth 32, 16 threads","power_consumption_read_w":"Average Power Read: 7.2 W (1TB), 7.5 W (2TB), 8 W (4TB), 6.7 W (8TB). Footnote 3: IOMeter 1.1.0 during a burst sequential read, moving average over 10 seconds","power_consumption_write_w":"Average Power Write: 6.2 W (1TB), 7 W (2TB), 7.2 W (4TB), 8 W (8TB). Same method as read","power_consumption_sleep_mw":"Sleep (PS4) 5 mW on every capacity","endurance_tbw":"600 TB (1TB), 1,200 TB (2TB), 2,400 TB (4TB), 4,800 TB (8TB). JEDEC client workload JESD219. Warranty is 5 years or the TBW limit, whichever comes first","mtbf_h":"Published as MTTF up to 1.75M hours, Telcordia SR-332 stress testing at 25 C. Stored as 1750000","warranty_years":"5 years or the maximum endurance (TBW) limit, whichever occurs first. The datasheet is global and names no market","security_features":"Security row reads TCG OPAL 2.01. Footnote: requires motherboard BIOS or third-party software to enable","software_name":"Featured software row reads SANDISK Dashboard (Windows only) and Acronis True Image for SANDISK software","operating_temperature_c":"32 to 185 F (0 to 85 C), as reported by the drive. The non-operating range of -40 to 85 C is not stored","dimensions_mm":"Bare drive, length 80 mm and width 22 mm for all capacities. Height 2.38 mm for 1TB and 2TB, 3.88 mm for 4TB and 8TB. Footnote 8: length and width vary by +/-0.15 mm. Base is the 2TB bare drive","weight_g":"7.5 g for 1TB and 2TB and 8.6 g for 4TB and 8TB. Footnote 8: weight varies by +/-1 g","spec_sheet_url":"Optimus datasheet, product page link named SANDISK Optimus GX PRO 850X data sheet","heatsink":"This datasheet covers the bare drives. Heatsink versions have their own datasheet","variants":"Rows are the four capacities, bare and with a heatsink. Per-capacity speeds, IOPS, power and TBW are identical for the bare and heatsink models. Base is the 2TB bare drive"}},{"url":"https://documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/sandisk-optimus-gx-pro/data-sheet-optimus-gx-pro-850x-internal-heatsink-ssd.pdf","kind":"manufacturer_pdf","accessed":"2026-10-14","fields":["model_numbers","heatsink","compatible_platforms","dimensions_mm","weight_g","variants"],"notes":{"model_numbers":"Heatsink models SDSP81100TAH, SDSP81200TAH, SDSP81400TAH and SDSP81800TAH","heatsink":"Datasheet title reads SANDISK Optimus GX PRO 850X with Heatsink","compatible_platforms":"The heatsink text reads compatible with PS5 and PS5 Pro consoles. The PS5 line is for the heatsink models only, the bare drive is listed for Windows","dimensions_mm":"Heatsink models, rounded: 80 x 23 x 8.90 mm for 1TB and 2TB, 80 x 24 x 10.31 mm for 4TB and 8TB. The WD_BLACK SN850X datasheet gives 23.40 and 24.46 mm widths, which are stored","weight_g":"24 g for 1TB and 2TB and 30.4 g for 4TB and 8TB, heatsink models","variants":"Heatsink rows use the same speeds, IOPS, power and TBW as the bare rows"}},{"url":"https://documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/wd-black-ssd/data-sheet-wd-black-sn850x-nvme-ssd.pdf","kind":"manufacturer_pdf","accessed":"2026-10-14","fields":["model_numbers","dimensions_mm","weight_g","rgb_lighting","compatible_platforms","heatsink","variants"],"notes":{"model_numbers":"Earlier WD_BLACK SN850X model numbers: WDS100T2X0E, WDS200T2X0E, WDS400T2X0E, WDS800T2X0E (without heatsink) and WDS100T2XHE, WDS200T2XHE, WDS400T2XHE, WDS800T2XHE (with heatsink). Same hardware under the old name. Sandisk's own page lists the Optimus numbers","dimensions_mm":"Heatsink models: 80 +/-0.20 x 23.40 +/-0.40 x 8.90 +/-0.40 mm for 1TB and 2TB, 80 +/-0.20 x 24.46 +/-0.48 x 10.31 +/-0.50 mm for 4TB and 8TB. Bare drives 80 x 22 x 2.38 mm (1TB, 2TB) and 3.88 mm (4TB, 8TB)","weight_g":"Heatsink models 24 g +/-3 g (1TB, 2TB) and 30.4 g +/-3 g (4TB, 8TB). Bare 7.5 g +/-1 g and 8.6 g +/-1 g","rgb_lighting":"Dashboard text: customize your RGB lighting (heatsink versions only). The Optimus datasheets do not mention RGB","compatible_platforms":"System compatibility row reads Windows 10+ and PlayStation 5 (heatsink model only)","heatsink":"All capacities have an optional heatsink version","variants":"Datasheet dated July 2025, WD_BLACK SN850X name on Sandisk's document server"}},{"url":"https://www.sandisk.com/products/ssd/internal-ssd/sandisk-optimus-gx-pro-850x-internal-nvme-ssd","kind":"manufacturer_page","accessed":"2026-10-14","fields":["manufacturer_url","status","series","gtins","model_numbers","in_the_box","compatible_platforms","dram_cache","form_factor","pcb_sides","storage_gb","variants"],"notes":{"status":"Product page lists eight SKUs for sale: four capacities, with and without a heatsink","series":"Maker line name is SANDISK Optimus GX PRO","gtins":"UPC in the page data: 619659231972 (1TB), 619659231965 (2TB), 619659231958 (4TB), 619659231941 (8TB) without heatsink. 619659232016 (1TB), 619659232009 (2TB), 619659231996 (4TB), 619659231989 (8TB) with heatsink","model_numbers":"SKUs SDSP81100TAN-000E0, SDSP81200TAN-000E0, SDSP81400TAN-000E0, SDSP81800TAN-000E0 and SDSP81100TAH-000E0, SDSP81200TAH-000E0, SDSP81400TAH-000E0, SDSP81800TAH-000E0","in_the_box":"In The Box reads SANDISK Optimus GX PRO 850X NVMe SSD, the same on every SKU","compatible_platforms":"Compatibility reads Windows 10+, PCIe 4.0 x4 interface and M.2 2280 port. The heatsink text reads compatible with PS5 and PS5 Pro","dram_cache":"DRAM Cache: Yes","form_factor":"Form Factor reads M.2 2280 S3-M for 1TB and 2TB and M.2 2280 D5-M for 4TB and 8TB","pcb_sides":"S3-M for 1TB and 2TB, D5-M for 4TB and 8TB","storage_gb":"1TB, 2TB, 4TB, 8TB","variants":"Specifications tables per SKU agree with the datasheets. The inch dimensions on the page are rounded and one 8TB bare SKU shows a typo (0.03 in width), so the metric datasheet values are used"}},{"url":"https://www.storagereview.com/news/western-digital-announces-new-wd_black-gaming-ssds","kind":"press","accessed":"2026-10-14","fields":["announce_date","launch_price_usd","release_date"],"notes":{"announce_date":"Announced at Western Digital's What's Next event, article dated 9 May 2022, as the WD_BLACK SN850X. Sandisk renamed the drive Optimus GX PRO 850X in 2026 with no technical change","launch_price_usd":"Western Digital's release says 1TB, 2TB and 4TB start at $189.99 (U.S. MSRP). Launch-day coverage and the Tom's Hardware review table list $159.99 for 1TB, so the May figure is not stored","release_date":"Release says available starting July 2022. First reviews and the retail launch came in August 2022"}},{"url":"https://www.pcgamesn.com/wd/black-sn850x-release-price","kind":"press","accessed":"2026-10-14","fields":["release_date","launch_price_usd"],"notes":{"release_date":"Article dated 18 August 2022 says the SN850X launches today in 1TB, 2TB and 4TB","launch_price_usd":"Launches at $159.99 for the starting model (1TB), US"}},{"url":"https://www.tomshardware.com/reviews/wd-black-sn850x-ssd-review-back-in-black","kind":"review_site","accessed":"2026-10-14","fields":["release_date","launch_price_usd","controller","nand_flash","nand_layers","dram_cache_gb","pcb_sides","rgb_lighting","variants"],"notes":{"release_date":"Original review published 25 August 2022, updated 13 October 2022","launch_price_usd":"Specifications table pricing, US, without and with heatsink: 1TB $159.99 / $179.99, 2TB $289.99 / $309.99, 4TB $699.99. Review text calls it the launch pricing and MSRP. 4TB had no heatsink version at launch","controller":"Table reads WD Proprietary. Text: updated version of the SN850 controller, still eight-channel. Maker names no controller","nand_flash":"Table reads 112-Layer BiCS5 TLC for 1TB, 2TB and 4TB. Sandisk's datasheet names only BiCS TLC","nand_layers":"112 layers, BiCS5, for 1TB, 2TB and 4TB","dram_cache_gb":"2TB sample: DRAM module D9XPG, a 16Gb DDR4 module from Micron with 16-bit width, 2GB of memory. Other capacities not stated","pcb_sides":"Review calls the drive single-sided (2TB bare sample) and says 1Tb dies were needed to keep the 4TB single-sided. Sandisk's module code reads D5-M (double-sided) for 4TB, which is stored","rgb_lighting":"Optional heatsink with RGB for the 1TB and 2TB models","variants":"Launch prices per capacity and heatsink"}},{"url":"https://www.tomshardware.com/reviews/wd-black-sn850x-ssd-review-back-in-black/3","kind":"review_site","accessed":"2026-10-14","fields":["measured_max_temp_c","measured_power_idle_mw"],"notes":{"measured_max_temp_c":"2TB, bare drive, tested without a heatsink or extra airflow. Writing the entire cache (15-minute Iometer sequential write) got the S.M.A.R.T. reported temperature into a throttling range between 78 and 85 C, so the top of the range is stored. Idle was 48 C. Intel Core i9-11900K, ASRock Z590 Taichi, Windows 10 Pro, drive prefilled to 50% and tested as a secondary device","measured_power_idle_mw":"2TB, bare. Quarch HD Programmable Power Module, idle power with ASPM/LPM disabled: 1,124 mW with Game Mode off and 1,052 mW with Game Mode on. Game Mode off is stored. Value printed on the chart. The review also says the cache is almost 600 GB and the post-cache speed is below 2,000 MB/s on a chart, which are not stored as exact numbers"}},{"url":"https://www.tomshardware.com/pc-components/ssds/wd-black-sn850x-8tb-ssd-review-the-no-compromise-8tb-champion","kind":"review_site","accessed":"2026-10-14","fields":["nand_flash","nand_layers","pcb_sides","launch_price_usd","controller","variants"],"notes":{"nand_flash":"8TB table row reads Kioxia 162-Layer TLC (BiCS6), with 112-layer BiCS5 on 1TB to 4TB. Decoded from the flash marking. The review says BiCS6 may reach the smaller capacities later","nand_layers":"162 layers for the 8TB","pcb_sides":"Review says the 8TB and the 4TB are both double-sided","launch_price_usd":"Specifications table pricing for 8TB: $849.99 without and $899.99 with heatsink, US. Review published 16 October 2024","controller":"Controller code A101-000292-B2 on the 8TB and 20-82-20035-V2 on the original. Review says SanDisk technology, an update with a higher bus rate","variants":"8TB launch prices and flash"}},{"url":"https://www.tomshardware.com/pc-components/ssds/wd-black-sn850x-8tb-ssd-review-the-no-compromise-8tb-champion/2","kind":"review_site","accessed":"2026-10-14","fields":["measured_max_temp_c","measured_power_idle_mw","variants"],"notes":{"measured_max_temp_c":"8TB, bare non-heatsink drive: maximum 68 C on the primary composite sensor, about 22 C ambient, active cooling unless noted. Intel Core i9-12900K, Asus ROG Maximus Z790 Hero, Windows 11 Pro, drive prefilled to 50%, tested as a secondary drive. Stored in the 8TB row","measured_power_idle_mw":"8TB, Quarch idle power with ASPM/LPM disabled: 1,085 mW, printed on the chart. Stored in the 8TB row","variants":"8TB row, measured_slc_cache_gb: Iometer 1MiB sequential write at queue depth 32 for two hours. Writes for over 365 seconds at over 6.4 GB/s, a cache of around 2350 GB, hybrid pSLC. measured_post_cache_write_mbs: first state after the cache is a direct-to-TLC phase at 2.85 GB/s for about 12 seconds, stored as 2850. The slower folding state of a little over 1.2 GB/s is not stored"}},{"url":"https://www.kitguru.net/components/ssd-drives/simon-crisp/wd-black-sn850x-with-heatsink-2tb-ssd-review/all/1/","kind":"review_site","accessed":"2026-10-14","fields":["controller","dram_cache_gb","release_date","measured_seq_read_mbs","measured_seq_write_mbs","measured_random_read_q1_mbs","measured_random_write_q1_mbs","variants"],"notes":{"controller":"Review calls it an 8-channel Gen 4 WD controller, probably an updated version of the in-house G2 controller. Part code 20-82-20035-B2","dram_cache_gb":"2TB sample has a 2GB DDR4 cache chip","release_date":"Review dated 2 November 2022","measured_seq_read_mbs":"2TB with heatsink sample (WDS200T2XHE), CrystalDiskMark 8.0.4 default profile (NVMe settings), SEQ1M Q8T1 read 7377.06 MB/s. AMD Ryzen 5 3600X, MSI MPG X570 Gaming Edge Wifi, drive wiped with HDDerase v4, 1GiB test size, 5 runs. The result goes in the heatsink 2TB row, which is the tested drive, and in the base as the 2TB result","measured_seq_write_mbs":"SEQ1M Q8T1 write 6687.54 MB/s, same run. The review text quotes 6,696 MB/s with the 0 fill profile, which is not stored","measured_random_read_q1_mbs":"RND4K Q1T1 read 86.74 MB/s, same default run, read from the CrystalDiskMark screenshot and confirmed in the review text","measured_random_write_q1_mbs":"RND4K Q1T1 write 267.88 MB/s, same run","variants":"Heatsink 2TB row carries the CrystalDiskMark results"}},{"url":"https://www.storagereview.com/review/sandisk-wd_black-sn8100-review-elite-performance-in-a-gen5-ssd","kind":"review_site","accessed":"2026-10-14","fields":["benchmark_3dmark_storage"],"notes":{"benchmark_3dmark_storage":"WD SN850X 2TB overall score 3,962 in the 3DMark Storage table of the SN8100 review dated 13 May 2025. AMD Ryzen 7 9800X3D, Asus ROG Crosshair X870E Hero, G.Skill DDR5-6000, RTX 4090, Windows 11 Pro. The review does not say if the sample had a heatsink, so it is placed in the bare 2TB row"}},{"url":"https://www.thessdreview.com/our-reviews/nvme/wd_black-sn850x-gen4-8tb-ssd-review","kind":"review_site","accessed":"2026-10-14","fields":["controller"],"notes":{"controller":"Review of the 8TB calls it a SanDisk in-house Gen 4 8-channel SSD controller"}},{"url":"https://www.guru3d.com/story/western-digital-releases-8tb-variant-of-wd-black-sn850x-ssd-at/","kind":"press","accessed":"2026-10-14","fields":["launch_price_usd","variants"],"notes":{"launch_price_usd":"8TB launch coverage dated 16 July 2024: $849 without a heatsink (WDS800T2X0E) and $899 with a PS5-compatible heatsink (WDS800T2XHE). IT Home reports $849.99 and $50 more for the heatsink","variants":"8TB added in July 2024"}},{"url":"https://www.channelpartner.de/article/3902358/western-digital-verdoppelt-kapazitaet-seiner-gaming-ssds.html","kind":"press","accessed":"2026-10-14","fields":["variants"],"notes":{"variants":"launch_price_eur: Germany, UVP, article dated 24 July 2024: 4TB with heatsink 539.99 EUR and 8TB without heatsink 953.99 EUR. Club386 lists 967.99 EUR for the 8TB in another market, which is not stored. No EUR launch prices found for the other rows. The 4TB with heatsink also first appeared in July 2024"}}],"fields_filled":47,"updated":"2026-10-16"},"meta":{"api_version":"1","docs":"https://arkivo.dev/api"}}