Steam app 3515100 · updated 12 Sep 2026, 19:21 UTC
OCCT is the gamer's favorite app for stress testing their PC or Steam deck components and check for errors ! Find out if your latest crash is due to a hardware malfunction or yet another game bug, and see all monitoring and system information in an easy-to-use interface.
718 hourly samples, with the daily peak drawn over them. Weekends are shaded.
16 months, June 2025 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
31 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
31 days as the curve, each the highest figure that day. Behind it, 437 hourly samples from 13 Aug, which is as far back as the source keeps every hour. Weekends are shaded.
12 days as the curve, each the highest figure that day. Behind it, 281 hourly samples. Each dip is a night. Weekends are shaded.
OCCT was released on 24 Jun, 2025.
| Language | Full audio |
|---|---|
| English |
A blank audio cell means full audio was not marked in the returned language list.
47 developer announcements, Jul 2025 to Sep 2026 · times in UTC
OCCT 17.1.2 is available ! Changelog : Main : Fixed a bug where the CPU test and the CPU + RAM test would kill each other if both selected in a combined test Main : Idle timer reserved for GPU test initialization is now disabled when no GPU…
Patch notesOCCT 17.1.1 is available ! Changelog : Enterprise : Fixed an issue where OCCT would refuse to use some skins in the diagnostic edition Enjoy !
Patch notesOCCT 17.1.0 is available ! Changelog : Main : Improved the tests crashing behaviour, crashes will be reported immediately instead of waiting for a timeout, and provide more diverse error codes Main : Tightened test launching process to…
Patch notesOCCT 17.0.18 is available ! Changelog : Ui : Fixed : Restoring the proper UI priority would not work on Linux Memory : Fixed : The latency / Bandwidth benchmark would not work correctly on Linux Enjoy !
Patch notesOCCT 17.0.17 is available ! Changelog : Memory : Fixed non-deterministic behaviours that might lead to crashes Memory : Slightly optimized write blocks Enjoy !
Patch notesOCCT 17.0.16 is available ! Changelog : Main : Improved reliability of tests scheduling Enjoy !
Patch notesOCCT 17.0.15 is available ! Changelog : Benchmark : Storage : Fixed a bug where the benchmark would idle for 10 seconds before starting Enjoy !
Patch notesOCCT 17.0.14 is available ! Changelog : Enterprise : Fixed a bug where the schedule would fail to load storage tests with multiple mount points. Enjoy !
Patch notesOCCT 17.0.13 is available ! Changelog : Monitoring : Monitoring Engine update Memory : Added a safeguard to prevent the Memory test to use AVX instruction to non-avx capable CPUs. It will revert to SSE. Enterprise : OCCT command-line will…
Patch notesOCCT 17.0.12 is available ! Changelog : Memory : Improved test reliability and maintainability Enjoy !
Patch notesOCCT 17.0.11 is available ! Changelog : Main : Fixed : Steam API should now initialize properly on Windows, and present the proper purchase option in the steam edition of OCCT Enjoy !
Patch notesOCCT 17.0.10 is available ! Changelog : Main : Fixed : The steam edition would display Patreon membership options and not Steam Enjoy !
Patch notesOCCT 17.0.9 is available ! Changelog : Main : Fixed : OCCT will now properly launch when your temp path or folder containing OCCT has a space in it. Thanks Paimon ! Enjoy !
Patch notesOCCT 17.0.8 is available ! Changelog : Main : Fixed : OCCT will now properly start when there's a non-ascii character in your windows username Enjoy !
Patch notesOCCT 17.0.7 is available ! Changelog : Main : Revamped the security features in the upload to make them more reliable Main : Fixed : the auto-update would fail if OCCT was stored in another disk than its temp folder Main : Fixed : Used more…
Patch notesOCCT v17.0.6 is available ! Changelog : Main : Fixed : OCCT diagnostic would dupe monitoring values during a remote session Memory : Fixed : There was a slight chance that the hash was missing under heavy load, preventing upload. This was…
Patch notesOCCT 17.0.5 is Available ! Changelog : Pro : Fixed : The CSV file was empty when a report was generated in Pro and Enterprise editions Enjoy !
Patch notesOCCT 17.0.4 is available ! Changelog : Main : Fixed : When the last known state following a crash was corrupted, OCCT would refuse to start Main : The last known state will now use a rolling scheme to ensure it is more reliable and more…
Patch notesOCCT 17.0.3 is available ! Changelog : Main : Fixed : 17.0.2 numbering was off, leading to it believing it's a beta when it's a stable version. Thanks Oliver ! Enjoy !
Patch notesOCCT 17.0.2 is available ! Changelog : Memory : Added the "AM5 Margin Probe" preset, winner of the memory preset contest. Congrats ! Enjoy !
Patch notesOCCT 17.0.1 is available ! Changelog : Changelog : Main : Fixed : OCCT would refuse to start under windows if the exe file name contained a space Enjoy !
Patch notesOCCT v17.0.0 is available ! Changelog : Main : Revamped the structure of OCCT's startup from the ground up. We now use a custom, auto-extractible package bringing many benefits Main : Optimized startup time by about 10 to 30% Main : 15 to…
Patch notesOCCT 16.1.10 is available ! Changelog : Main : Fixed : Closing the window while a test was running was sometimes not closing the test properly Main : Fixed : The last status window was not being shown during a CPU only test under specific…
Patch notesChangelog for OCCT 16.1.9 : Monitoring : Updated HwInfo to bring more compatibility and avoid some crashes in (thankfully) rare cases. Enjoy !
Patch notesOCCT 16.1.7 is available ! Changelog : Main : Fixed : Server-grade GNR were not properly detected and displayed as Workstation CPUs, leading to either a crash or bogus data being displayed. Monitoring : Ongoing fix : Some asus motherboards…
Patch notesOCCT 16.1.5 OUT ! Changelog : Main : Fixed : A crash would occur on some Asus board when loading monitoring Monitoring : Updated Monitoring engine Enjoy !
Patch notesOCCT 16.1.4 OUT ! Changelog : Main : Tentative fix : Granite Rapids Server CPUs were wrongly detected as GNR-WS CPUs, leading to issues with the System tuning section Memory : Fix : A typo in the language files could cause issues in…
Patch notesOCCT 16.1.3 is available ! Changelog : Main : Fixed : some EPYC AMD processor were wrongly recognized by the system tuning section on Linux Enjoy !
Patch notesOCCT 16.1.2 is now available ! Changelog : Main : Fixed UI on steam deck Main : Resumed steam version upload ( Sorry ! ) Enjoy !
Patch notesOCCT 15.0.13 is available ! Changelog : Main : New skin available in partnership with Mono ! Enjoy OCCT with his very iconic avatar. Main : Merry Christmas everyone ! Enjoy !
Patch notesOCCT 15.0.12 is available ! Changelog : Vram : Fixed : The test would revert adapters from All to Specific when a schedule was loaded Ui : Fixed : The background color for the test executing was off in the OCCT skin Enterprise : Fixed : The…
Patch notesOCCT 15.0.9 is available ! Changelog : Memory : Fixed : Only the first 64 cores of CPUs with more than 64 cores were used Enjoy !
Patch notesOCCT 15.0.8 is available ! Changelog : Gpu3DAdaptive : Fixed : Lengthened the initialization period of 3D Adaptive due to Intel drivers being slow to kick in their game frequencies. The scaling now properly works on ARC GPUs Report…
Patch notesOCCT 15.0.7 is available ! Changelog : Main : Fixed : Saving the debug information under Linux could result in an app crash Main : Fixed : OCCT will now properly cycles through temp folder when juggling with permissions ( root / non-root )…
Patch notesOCCT 15.0.6 is available ! Changelog : Main : All our GPU test will now report which GPU they were running on when crashing Main : Fixed : the Combined test was reporting a success status even if one of its test crashed ( errors were…
Patch notesOCCT 15.0.5 is available ! Changelog : Benchmark : Fixed : benchmarks wouldn't stop executing when upload to ocbase was disabled Enjoy !
Patch notesOCCT 15.0.4 is available ! This important update fixes a very tough issue where OCCT, when launched from Steam under Linux, would refuse to start. The compatibility layer of Steam was at fault. Thank you for the reports and patience ! We're…
Patch notesOCCT 15.0.2 is available ! Changelog : Main : Fixed : Auto-update will now work again Benchmark : Fixed : When uploading a benchmark, there was a chance of an exception if the graph bars were missing due to not enough data Enterprise…
Patch notesOCCT 15.0.1 is available ! Changelog : Main : Fixed : Graphical glitch with the background when running a test and the LTT skin Enterprise : Fixed : When uploading a schedule with 3D Adaptive in Coil While mode, the selected song would…
Patch notesOCCT 15.0.0 is now available ! Changelog : Main : First release of OCCT's Storage stability test, allowing for heavy stress testing of HDDs and SSDs, pushing them to their limits ! Main : Linux : Drastically lowered the requirements of…
Patch notesChangelog : Enterprise : OCCT will now pre-fill metadatas that are tied to devices if the data has already been entered once Small, cosmetic bugfixes
Patch notesOCCT v14.2.5 released ! Changelog : Main : Improved debug file to include Vulkan / OpenCL adapter information StabilityCertificate : Fixed : Durations were off in 14.2.4, resulting in failed uploads
Patch notesOCCT 14.2.4 has been released ! Changelog : Monitoring : Updated HwInfo to v8.29 SysInfo : Fixed : The cache was badly reported by HwInfo on some CPUs ( 12700K confirmed ) leading to a bad Latency / Bandwidth benchmark result SysInfo…
Patch notesOCCT 14.2.3 released ! SysInfo : Some intel integrated GPUs are not giving enough information in OpenCL to link them to their Vulkan counterpart. OCCT added a failsafe that tries to map them using their names as a last resort, fixing this…
Patch notesOCCT 14.2.2 released ! * Main : Fixed : uploading a custom test schedule generated with OCCT versions > 14.2 would fail * Gpu3DAdaptive : Fixed : UE GPU adapter selection is rather lacking, so we modded the engine to better target the…
Patch notesOCCT 14.2.1 is available ! This is a bugfix release. Changelog : Ui : Fixed " The Auto updates were disabled, the setting would disappear on subsequent startups of the GUI (Thanks Serhii !) SysInfo : Fixed : When no adapters were detected…
Patch notesOCCT v14.2 update is here and it's an important one! 🥳 With v14.2, we're making a major change: we’re dropping DirectX and switching to Vulkan by default. Why? 🔴On Linux, OpenCL support is optional, and finding which OpenCL adapter…
Patch notesWhat Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Launch | OCCT.exe | -steam | windows 64 | |
| Launch | OCCT | -steam | linux 64 |
The folders Steam Cloud syncs. The root is a token Steam uses for a location on your own machine, not a path this page can know.
| Root | Folder | Files |
|---|---|---|
gameinstall | *.okl | |
gameinstall | occt.config.json |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG