fio - Generate I/O for benchmarking, stress testing, verification or workload reproduction purposes.
Speccy - Speccy - find the details of your computer's specs. Great for spotting issues or finding compatible upgrades. Download the latest version free.
CrystalMark - CrystalMark is a full included benchmark application that can be utilized for surveying the execution and capacities of a PC.
HWiNFO - Professional System Information and Diagnostics. Comprehensive Hardware Analysis, Monitoring and Reporting for Windows and DOS. FREEWARE. download. Advertisements.
Iometer - As the Iometer Users Guide says, Iometer is an I/O subsystem measurement and characterization tool...
AIDA64 - AIDA64 is a system information, diagnostics and benchmarking solution for Windows PC.