# Intel QuickAssist Technology (QAT) Architecture reference: Feex Also called QuickAssist Engine Intel QuickAssist Technology, QAT, supplies supported cryptographic and compression acceleration through dedicated hardware and a software stack. A QuickAssist Engine field does not specify the complete device configuration or enabled algorithms. ## What you need to know Intel QuickAssist Technology, QAT, supplies supported cryptographic and compression acceleration through dedicated hardware and a software stack. A QuickAssist Engine field does not specify the complete device configuration or enabled algorithms. ## How it works Applications or integrated libraries submit eligible work through drivers and an acceleration API. Hardware generation, configured services and software support determine available algorithms and throughput. Submission, data movement, batching and completion handling add costs outside the accelerated primitive. ## Where it is useful A server application can use a supported compression or cryptographic provider to offload eligible requests. Small requests or low queue depth may behave differently from a saturated batched benchmark, and unsupported operations need a correct fallback. ## How to check support and enablement Identify the actual QAT device/generation and its supported driver, firmware, service configuration and application integration. Inspect provider diagnostics to verify offload and fallback behavior rather than assuming the presence of a CPU database field means active acceleration. Hardware availability is only the first step. The driver, runtime, execution provider, supported operators and numeric format must match the application. Inspect actual backend selection and fallback rather than assuming an AI label means every model is accelerated. ## What the feature does not establish QAT is distinct from AES-NI CPU instructions and from an NPU. Support does not establish enabled engine count, all algorithms, a certification or a particular application speedup. Platform activation and driver compatibility must be checked for the exact product. ## Compatibility and performance in practice Compare complete workloads under stated conditions, including compilation, transfers and unsupported operators. Peak operations per second depend on precision and counting assumptions. They are not a substitute for measured latency, throughput, energy or model accuracy. ## A practical verification checklist 1. Record the exact processor or platform model and the application, OS and runtime versions involved. Preserve the wording of the actual error or requirement. 2. Check the manufacturer reference for that exact model, then inspect the effective capability and enabled state in the environment where the program runs. 3. Compare every requirement of the selected binary or backend. A similarly named feature, alias or broad technology label is not enough. 4. Confirm the application selected the intended implementation. Use its documented diagnostics and a supported fallback when requirements are not met. 5. Make one supported change at a time and repeat the same workload. Keep the original configuration and recovery path available. ## If the feature is listed but software cannot use it Start with the exact failing component. A hardware database describes recorded capability; the operating system or hypervisor can expose a different effective environment. An illegal-instruction error also needs investigation of the actual faulting instruction and binary build, because corruption or an unrelated unsupported instruction can produce a similar symptom. Install the application, driver or runtime version supported for the exact platform, and use the vendor's documented baseline or fallback build if needed. A software update cannot create an instruction that the processor lacks. Firmware and security-policy changes should follow the system manufacturer's procedure and a recovery plan rather than a generic optimization recipe. ## Related features and useful distinctions [AES-NI](https://feex.it/wiki/hardware/system/aes-ni/) · [VAES](https://feex.it/wiki/hardware/system/vaes/) · [AMX, Advanced Matrix Extensions](https://feex.it/wiki/hardware/system/amx/) · [Neural Processing Unit (NPU)](https://feex.it/wiki/hardware/system/npu/) ## Sources and scope of this explanation [Intel QuickAssist Technology programmer documentation](https://intel.github.io/quickassist/PG/introduction.html) These references establish architectural behavior and software requirements. They do not independently verify every feature value on a linked hardware model page. For model support, use that page's manufacturer evidence and check the effective system configuration. This article does not supply a benchmark, certification or independent review date. ## Related These entities connect to this article. Type is shown on every link. [AES-NI: Architecture reference](https://feex.it/wiki/hardware/system/aes-ni/)[VAES: Architecture reference](https://feex.it/wiki/hardware/system/vaes/)[AMX, Advanced Matrix Extensions: Architecture reference](https://feex.it/wiki/hardware/system/amx/)[Neural Processing Unit (NPU): Architecture reference](https://feex.it/wiki/hardware/system/npu/) ## Sources and verification Editorial ownership: Feex. No independent review date is recorded. [How we research](https://feex.it/wiki/research/). - [Intel QuickAssist Technology programmer documentation ](https://intel.github.io/quickassist/PG/introduction.html)· Hardware/software architecture and cryptographic/compression service APIs, with links to release-specific requirements. [Report a correction to Feex](https://feex.it/contact/) ## Was this article useful? A yes or no is enough. Pick a reason if you want, or add a short note. Quick facts The short identity of this page. Specs, sources, and the full story stay in the article. --- Source: [Canonical Feex Wiki page](https://feex.it/wiki/hardware/system/quickassist/) [Developer guide](https://feex.it/wiki/developers/) | [API policy](https://feex.it/developers/api-policy/) | [Agent guidance](https://feex.it/wiki/llms.txt)