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r7iz.large

4th Generation Intel Xeon Scalable (Sapphire Rapids) Processors Memory-optimized, high CPU performance instance with 3.9 GHz sustained all-core turbo frequency. It utilizes DDR5 memory for up to 2.4x higher memory bandwidth and is built on the AWS Nitro System. It is the fastest 4th Generation Intel Xeon Scalable-based instance in the cloud and includes built-in accelerators like Advanced Matrix Extensions (AMX)

available for self-hosted runners on RunsOn
cpu speed · passmark single-thread
3,066pts
Intel(R) Xeon(R) Gold 6455B (x86_64)
averaged over many days · higher is faster
vcpus
2
physical threads
memory
15.3 GiB
ram
clock speed
3.9 GHz
max frequency
architecture
x86_64
x86_64

ec2 instance family: r7iz

What the family is built for, the silicon underneath, and how to ask RunsOn for it.

r7iz memory optimized
cpu type
Intel Xeon Scalable (Sapphire Rapids) — 4th Generation Intel Xeon Scalable (Sapphire Rapids) Processors
architecture
x86_64 · x86_64
highlights
Memory-optimized, high CPU performance instance with 3.9 GHz sustained all-core turbo frequency. It utilizes DDR5 memory for up to 2.4x higher memory bandwidth and is built on the AWS Nitro System. It is the fastest 4th Generation Intel Xeon Scalable-based instance in the cloud and includes built-in accelerators like Advanced Matrix Extensions (AMX)
released
September 7, 2023
.github/workflows/ci.yml yaml 
jobs:
  build:
    runs-on:
      - runs-on=${{ github.run_id }}
      - family=r7iz
      - cpu=2
the label is a query — each line one constraint, resolved at launch. job labels →

availability & price by region

Spot is the average price RunsOn pays in your own AWS account — no per-minute markup. The bar shows how far under on-demand each region runs; the badge is the observed spot-interruption frequency.

US
N. Virginia
us-east-1
spot · avg $0.0536/hr
on-demand$0.1860
savings vs on-demand69%
spot interrupt freq 5-10%
US
Oregon
us-west-2
best spot
spot · avg $0.0498/hr
on-demand$0.1860
savings vs on-demand70%
spot interrupt freq <5%
IE
Ireland
eu-west-1
spot · avg $0.0802/hr
on-demand$0.2080
savings vs on-demand56%
spot interrupt freq <5%
DE
Frankfurt
eu-central-1
spot · avg $0.0717/hr
on-demand$0.2250
savings vs on-demand67%
spot interrupt freq <5%

Spot prices are trailing averages per region and move with the market. On-demand is the list reference. Interrupt frequency is AWS's published spot-advisor band for this instance type.

about these benchmarks

CPU is the Passmark single-thread metric, run on a live r7iz.large instance and averaged over many days so a single noisy run can't skew the score.

Pricing is normalized to the hourly rate AWS bills, then shown per region. Spot is the trailing average; savings is measured against the same region's on-demand list price.

This instance is launched the exact same way any RunsOn job launches it — ephemeral EC2 in your account, one CloudFormation stack, nothing to babysit.

metricpassmark · single-thread
samples21 runs
regions4 · us-east-1, us-west-2, eu-west-1, eu-central-1
last updatedJune 10, 2026

run r7iz.large in your own account.

The benchmark runs on the same RunsOn anyone can deploy. One CloudFormation stack, your AWS account, ~10 minutes.

self-host → ← all ec2 instances