US
N. Virginia
us-east-1
spot · 7-day average $0.0346/hr
on-demand$0.1078
spot interrupt freq 15-20%
c8a.large
AMD EPYC Turin, 2 GB per vCPU.
available for self-hosted runners on RunsOn
single-thread · passmark
3,812pts
vcpus
2
2 cores
memory
4 GiB
ram
clock speed
4.5 GHz
max frequency
architecture
x86_64
x64
Measured
5 jobs of 5 finished in the hardware suite, 30 Sep–2 Oct: the values are their medians. Every job links its log on the open harness.
CPU Mark
6,912
PassMark, both vCPUs
cores of work
1.98
sysbench, 2 threads ÷ 1
sysbench 1 thread
5,416
events per second
7-zip
14,933
MIPS, all threads
| date | suite | single-thread | capacity | job log |
|---|---|---|---|---|
| 2 Oct 2026 | hardware suite | 3,812 | spot | job log ↗ |
| 2 Oct 2026 | hardware suite | 3,815 | spot | job log ↗ |
| 1 Oct 2026 | hardware suite | 3,679 | on-demand | job log ↗ |
| 1 Oct 2026 | hardware suite | 3,816 | spot | job log ↗ |
| 30 Sep 2026 | hardware suite | 3,787 | spot | job log ↗ |
- Cross-check, daily PassMark: 3,783 single-thread over 3 runs (PassMark only, every day on RunsOn's 2 vCPU runners).
- Also a runner in RunsOn's runner benchmarks: see it as a CI runner →
EC2 instance family: c8a
What the family is built for, the silicon underneath, and how to ask RunsOn for it.
c8a compute
cpu type
AMD EPYC 9R45 (Turin)
architecture
x64 · x86_64
notes
AMD EPYC Turin, 2 GB per vCPU.
.github/workflows/ci.yml yaml
jobs: build: runs-on: - runs-on=${{ github.run_id }} - family=c8a - cpu=2
the label is a query — each line one constraint, resolved at launch. job labels →
Availability & price by region
Spot is the 7-day average of the cheapest zone's spot price in each region, from the RunsOn finder: an estimate of an hour in your own AWS account, where RunsOn adds no markup. The bar shows how far it runs under on-demand; the badge is AWS's spot-interruption band for the type.
US cheapest spot
Oregon
us-west-2
spot · 7-day average $0.0333/hr
on-demand$0.1078
spot interrupt freq 15-20%
IE
Ireland
eu-west-1
spot · 7-day average $0.0409/hr
on-demand$0.1156
spot interrupt freq 10-15%
DE
Frankfurt
eu-central-1
spot · 7-day average $0.0396/hr
on-demand$0.1230
spot interrupt freq 10-15%
Spot is the cheapest availability zone's spot price at each of the RunsOn finder's fetches (every 90 minutes), averaged over 7 days; on-demand is the Linux list price. Savings compare the two. Prices fetched 5 Oct 2026. The interruption band is AWS Spot Advisor's, fetched 5 Oct 2026.
Other sizes measured
Larger c8a sizes the harness measured in RunsOn's runner benchmarks, each from the suite with the most runs.
| type | vCPU | memory | single-thread | CPU Mark | runs | spot · us-east-1 |
|---|---|---|---|---|---|---|
| c8a.xlarge | 4 | 8 GiB | 3,792 | 13,409 | 4 runs · hardware suite | $0.0769 |
| c8a.2xlarge | 8 | 16 GiB | 3,822 | 25,545 | 4 runs · hardware suite | $0.1609 |
About these benchmarks
The open benchmark harness launches c8a.large as a RunsOn runner and runs PassMark PerformanceTest (CPU Single
Threaded and CPU Mark), sysbench on one thread and on every thread, and 7-Zip's built-in benchmark. These numbers come from the
hardware suite, the suite that measured this type in the most runs; each is the median over its runs of the current
workload definition in the last 30 days.
A type takes a place once it has 3 runs. A type within 5% of the type heading its group shares that place (“joint #2”); a lead under 5% is no lead.
Prices come from the RunsOn finder for the four regions shown; savings compare its 7-day average spot price with the on-demand price. RunsOn launches this type the same way for any job: ephemeral EC2 in your account, one CloudFormation stack. More in the methodology.
Run c8a.large in your own account.
The benchmark runs on the same RunsOn anyone can deploy. One CloudFormation stack, your AWS account, ~10 minutes.