AWS m7gd.2xlargevsAWS m7gd.8xlarge

m7gd.2xlarge pairs 8 vCPUs with 32GB of RAM at $0.4271/hr On-Demand (about $308/mo at 24×7). m7gd.8xlarge pairs 32 vCPUs with 128GB at $1.7086/hr (~$1230/mo). m7gd.2xlarge is 300% cheaper per hour than m7gd.8xlarge ($1.2815/hr gap).

Because both instances are in the **m7gd family**, the only thing that changes between them is sizing — same silicon, same architecture (AWS Graviton (ARM64)), same burstable/sustained behavior. The choice is purely about how much capacity you actually need: m7gd.2xlarge gives you 8 vCPUs and 32GB of RAM, m7gd.8xlarge gives you 32 vCPUs and 128GB. AWS scales pricing close to linearly within a family, so picking the right size is mostly about right-sizing your workload, not getting a better deal per vCPU.

On raw price-per-performance, the two are m7gd.2xlarge delivers ~300% more single-thread Sysbench score per dollar (7064 vs 1766 points per $1/hr). That's the cleanest signal we have for "which one runs your workload faster per dollar," but it only matters if your workload is single-thread-bound; for parallel workloads the multi-core scores (23916 vs 96212) are what to weigh. Spot pricing flips many of these comparisons — when m7gd.2xlarge drops to $0.1191/hr and m7gd.8xlarge drops to $0.5970/hr, the cheap-per-hour winner can swing meaningfully.

In practice, pick m7gd.2xlarge when your workload is closer to general-purpose (balanced general-purpose workloads with a 1:4 vCPU-to-memory ratio). Pick m7gd.8xlarge when it's closer to general-purpose (balanced general-purpose workloads with a 1:4 vCPU-to-memory ratio). When neither side is obviously right, the cheaper hourly rate usually wins for fault-tolerant batch workloads, while the higher single-core score usually wins for latency-sensitive web traffic. The regional pricing tables linked from each instance page below show where each is currently cheapest — sometimes a >20% regional gap flips the comparison entirely.