Silicon Triangle
AWS M7 Generation: M7i vs M7a vs M7g vs M7i-flex
Comparing modern 4:1 memory-to-vCPU ratio General Purpose workhorses
The M-series is the default backbone for production web applications, microservices, and databases. See how Intel Sapphire Rapids, AMD Genoa, and Graviton3 stack up when paired with 4 GiB of RAM per vCPU.
1. Architectural & Silicon Specs Head-to-Head
Comparing underlying processor microarchitectures, memory ratios, and Nitro generation features using representative xlarge sizing.
m7ix86_64
M7I General Purpose
ProcessorIntel Xeon Scalable (Sapphire Rapids)
Clock Speed3.2 GHz
RAM / vCPU4.0 GiB/vCPU
Max Network50 Gbps
Max EBS IOPS240,000
AWS NitroSupported
Min Rate (m7i.xlarge)$0.2016/hr
Monthly Est.$147.17/mo
Cost per vCPU$0.0504/hr
Cost per GiB RAM$0.0126/hr
CoreMark Benchmark89,171
CoreMark / $442,316
Price Index87% of highest
Save 13% vs most expensive
Compute / $ Value50% of leader
m7ax86_64
M7A General Purpose
ProcessorAMD EPYC 9R14 Processor
Clock SpeedUp to 3.7 GHz
RAM / vCPU4.0 GiB/vCPU
Max Network50 Gbps
Max EBS IOPS240,000
AWS NitroSupported
Min Rate (m7a.xlarge)$0.2318/hr
Monthly Est.$169.24/mo
Cost per vCPU$0.0580/hr
Cost per GiB RAM$0.0145/hr
CoreMark Benchmark131,219
CoreMark / $565,989
Price Index100% of highest
Compute / $ Value64% of leader
m7gARM64 (Graviton)
M7G General Purpose
ProcessorAWS Graviton3 Processor
Clock Speed2.5 GHz
RAM / vCPU4.0 GiB/vCPU
Max Network30 Gbps
Max EBS IOPS80,000
AWS NitroSupported
Min Rate (m7g.xlarge)$0.1166/hr
Monthly Est.$85.12/mo
Cost per vCPU$0.0291/hr
Cost per GiB RAM$0.0073/hr
CoreMark Benchmark103,066
CoreMark / $883,928
Price IndexLowest Cost
Save 50% vs most expensive
Compute / $ Value100% (Leader)
m7i-flexx86_64
M7I-FLEX General Purpose
ProcessorIntel Xeon Scalable (Sapphire Rapids)
Clock Speed3.5 GHz
RAM / vCPU4.0 GiB/vCPU
Max NetworkUp to 25 Gbps
Max EBS IOPS80,000
AWS NitroSupported
Min Rate (m7i-flex.xlarge)$0.1915/hr
Monthly Est.$139.81/mo
Cost per vCPU$0.0479/hr
Cost per GiB RAM$0.0120/hr
CoreMark Benchmark78,698
CoreMark / $410,913
Price Index83% of highest
Save 17% vs most expensive
Compute / $ Value46% of leader
2. Side-by-Side Sizing & Pricing Matrix
Direct price and benchmark comparison across matching instance tiers in the lowest-cost region. Lowest hourly cost in each row is highlighted in green.
| Size Tier | vCPU | Memory | m7iLinux Rate | m7aLinux Rate | m7gLinux Rate | m7i-flexLinux Rate |
|---|---|---|---|---|---|---|
| .medium | 1 | 4 GB | — | — | ||
| .large | 2 | 8 GB | ||||
| .xlarge | 4 | 16 GB | ||||
| .2xlarge | 8 | 32 GB | ||||
| .4xlarge | 16 | 64 GB | ||||
| .8xlarge | 32 | 128 GB | ||||
| .12xlarge | 48 | 192 GB | ||||
| .16xlarge | 64 | 256 GB | ||||
| .24xlarge | 96 | 384 GB | — | — | ||
| .32xlarge | 128 | 512 GB | — | — | — | |
| .48xlarge | 192 | 768 GB | — | — |
3. Workload Decision Framework
Clear, actionable rules on when each family wins based on workload profile, runtime language, and licensing boundaries.
Recommended:M7g (Graviton3)
When: Kubernetes worker nodes, microservice fleets, and modern serverless runtimes
Why: Top-tier price-performance with 4 GiB/vCPU and full ecosystem support for ARM64 Linux.
Recommended:M7a (AMD Genoa)
When: High-concurrency web apps requiring maximum x86_64 per-core performance
Why: AMD Zen 4 cores with massive L3 cache deliver superior throughput on branch-heavy web code.
Recommended:M7i (Intel Sapphire Rapids)
When: Windows Server enterprise workloads or strict Intel vendor certifications
Why: Validated x86 hardware baseline with full AVX-512, AMX, and Intel QAT compatibility.
Recommended:M7i-flex
When: Cost-sensitive web servers rarely sustaining 100% continuous CPU utilization
Why: Zero-code-change 5% cost reduction from M7i for typical web and API server profiles.
5. Related Architecture Comparisons
Explore adjacent generational comparisons and silicon trade-offs.