US cheapest spot
N. Virginia
us-east-1
spot · 7-day average $0.0294/hr
on-demand$0.0765
spot interrupt freq 5-10%
c6a.large
** 3rd generation AMD EPYC processors (code named Milan). **. ** Compute-optimized instance built on the AWS Nitro System, featuring an all-core turbo frequency of up to 3.6 GHz. It provides up to 50 Gbps of networking speed, up to 40 Gbps of bandwidth to Amazon Elastic Block Store (EBS), and includes always-on memory encryption with AMD Transparent Single Key Memory Encryption (TSME). **.
available for self-hosted runners on RunsOn
single-thread · passmark
2,591pts
vcpus
2
1 core × 2 threads
memory
4 GiB
ram
clock speed
3.6 GHz
max frequency
architecture
x86_64
x64
Measured
2 jobs of 2 finished in the EC2 CPU sweep, 30 Sep–10 Oct: the values are their medians. Every job links its log on the open harness.
CPU Mark
3,440
PassMark, both vCPUs
cores of work
1.11
sysbench, 2 threads ÷ 1
sysbench 1 thread
3,940
events per second
7-zip
9,884
MIPS, all threads
| date | suite | single-thread | capacity | job log |
|---|---|---|---|---|
| 10 Oct 2026 | EC2 CPU sweep | 2,586 | spot | job log ↗ |
| 30 Sep 2026 | EC2 CPU sweep | 2,597 | on-demand | job log ↗ |
EC2 instance family: c6a
What the family is built for, the silicon underneath, and how to ask RunsOn for it.
c6a compute
cpu type
AMD EPYC 7R13 — ** 3rd generation AMD EPYC processors (code named Milan).
**
architecture
x64 · x86_64
highlights
** Compute-optimized instance built on the AWS Nitro System, featuring an all-core turbo frequency of up to 3.6 GHz. It provides up to 50 Gbps of networking speed, up to 40 Gbps of bandwidth to Amazon Elastic Block Store (EBS), and includes always-on memory encryption with AMD Transparent Single Key Memory Encryption (TSME).
**
released
** February 14, 2022
.github/workflows/ci.yml yaml
jobs: build: runs-on: - runs-on=${{ github.run_id }} - family=c6a - 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
Oregon
us-west-2
spot · 7-day average $0.0305/hr
on-demand$0.0765
spot interrupt freq 10-15%
IE
Ireland
eu-west-1
spot · 7-day average $0.0412/hr
on-demand$0.0821
spot interrupt freq 10-15%
DE
Frankfurt
eu-central-1
spot · 7-day average $0.0412/hr
on-demand$0.0873
spot interrupt freq <5%
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 12 Oct 2026. The interruption band is AWS Spot Advisor's, fetched 12 Oct 2026.
About these benchmarks
The open benchmark harness launches c6a.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
EC2 CPU sweep, 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 75 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 c6a.large in your own account.
The benchmark runs on the same RunsOn anyone can deploy. One CloudFormation stack, your AWS account, ~10 minutes.