Benchmarks for r8i-flex.large
CPU benchmark for the r8i-flex.large EC2 instance type, as well as the availability, pricing, and spot interruption percentage in various regions.
See the benchmarks for all EC2 instances.
This instance type is available for self-hosted GitHub Actions runners using RunsOn.
EC2 Instance family: r8i-flex
CPU Type: Custom Intel Xeon 6 processors (Granite Rapids) with a sustained all-core turbo frequency of 3.9 GHz. Specific Features: Memory-optimized "Flex" instance, designed for workloads that do not fully utilize all compute resources, offering up to 5% better price-performance than R8i and a baseline CPU performance of 40% with the ability to burst to 100% CPU performance 95% of the time over a 24-hour period. It uses DDR5 7200MT/s memory for 2.5x higher memory throughput and features 4.6x larger L3 cache compared to the previous generation. It is built on the AWS Nitro System. Date of Release: August 2025.
Results
This benchmark has been generated using the r8i-flex.large instance type.
Results are averaged over many days (you can mouse over the sparkline to get more details).
🇺🇸 North Virginia (us-east-1)
| Family | Instance | Processor | CPU speed | On-demand | Spot (avg) | Savings | Interrupt % |
|---|---|---|---|---|---|---|---|
r8i-flex | r8i-flex.large | Intel(R) Xeon(R) 6975P-C (x86_64) | 3200 | $0.1320 | $0.0627 | 56% | >20% |
🇺🇸 Oregon (us-west-2)
| Family | Instance | Processor | CPU speed | On-demand | Spot (avg) | Savings | Interrupt % |
|---|---|---|---|---|---|---|---|
r8i-flex | r8i-flex.large | Intel(R) Xeon(R) 6975P-C (x86_64) | 3200 | $0.1320 | $0.0449 | 60% | <5% |
🇮🇪 Ireland (eu-west-1)
| Family | Instance | Processor | CPU speed | On-demand | Spot (avg) | Savings | Interrupt % |
|---|---|---|---|---|---|---|---|
r8i-flex | r8i-flex.large | Intel(R) Xeon(R) 6975P-C (x86_64) | 3200 | $0.1477 | $0.0685 | 54% | <5% |
🇩🇪 Frankfurt (eu-central-1)
| Family | Instance | Processor | CPU speed | On-demand | Spot (avg) | Savings | Interrupt % |
|---|---|---|---|---|---|---|---|
r8i-flex | r8i-flex.large | Intel(R) Xeon(R) 6975P-C (x86_64) | 3200 | $0.1592 | $0.0548 | 67% | 15-20% |
About those benchmarks
Benchmarks are performed using the Passmark benchmarking tool, using the CPU Single Threaded metric.
Last updated:April 28, 2026