r6i.16xlarge
Memory optimized · r6i series · Intel Xeon 8375C (Ice Lake)
- vCPU
- 64
- Memory
- 512 GiB
- Linux / hour
- $4.03
- Per month
- $2,943
- Per vCPU-hour
- $0.0630
- Per GiB-hour
- $0.00788
Analysis
The r6i.16xlarge is a memory optimized instance in the r6i series with 64 vCPUs and 512 GiB of memory on Intel Xeon 8375C (Ice Lake) (up to 3.5 GHz), which makes it memory-heavy at 8 GiB of memory per vCPU.
Within the same generation and size, the r6g.16xlarge on AWS Graviton2 costs $3.23/hour, 20% less ($589 a month), though switching means rebuilding software for arm64. The other variants are the r6a.16xlarge at $3.63, the r6gd.16xlarge at $3.69 and the r6id.16xlarge at $4.84.
At $4.03/hour on demand in US East (N. Virginia), about $2,943 a month, the r6i.16xlarge is one of the cheaper ways to buy memory optimized capacity: only 16% of the 385 current memory optimized types cost less per vCPU-hour than its $0.0630.
Running it in N. Virginia instead of São Paulo saves $1,752 a month per instance: $4.03/hour against $6.43/hour, a 60% spread.
The newer r7i.16xlarge on Intel Xeon Scalable (Sapphire Rapids) is 5.0% dearer at $4.23/hour.
Looking beyond its own line, 6 of 39 current types with 64 vCPUs and similar memory are cheaper. The cheapest of those is the r7g.16xlarge on AWS Graviton3 at $3.43/hour.
It is size 7 of 9 in the r6i series. Stepping up to the r6i.24xlarge gives 96 vCPUs and 768 GiB for $1,472 more a month. Dropping to the r6i.12xlarge saves $736 a month.
Price by region (USD per hour)
| Region | Linux | Windows | 1-yr RI | 3-yr RI | |
|---|---|---|---|---|---|
| N. Virginia us-east-1 | $4.03 | $6.98 | $2.67 | $1.83 | |
| Ohio us-east-2 | $4.03 | $6.98 | $2.67 | $1.83 | |
| Oregon us-west-2 | $4.03 | $6.98 | $2.67 | $1.83 | |
| Canada Central ca-central-1 | $4.42 | $7.36 | $2.93 | $2.00 | |
| São Paulo sa-east-1 | $6.43 | $9.38 | $4.25 | $2.92 | |
| Ireland eu-west-1 | $4.51 | $7.46 | $2.98 | $2.05 | |
| London eu-west-2 | $4.74 | $7.68 | $3.14 | $2.14 | |
| Frankfurt eu-central-1 | $4.86 | $7.81 | $3.22 | $2.21 | |
| Mumbai ap-south-1 | $4.16 | $7.10 | $2.73 | $1.89 | |
| Singapore ap-southeast-1 | $4.86 | $7.81 | $3.22 | $2.21 | |
| Sydney ap-southeast-2 | $4.83 | $7.78 | $3.19 | $2.20 | |
| Tokyo ap-northeast-1 | $4.86 | $7.81 | $3.22 | $2.21 |
Shared tenancy, no pre-installed software. Reserved rates are standard, no upfront, per hour. Prices as of 2026-11-04.
Same shape, other types
| Type | vCPU | Memory | $/hour | vs r6i.16xlarge |
|---|---|---|---|---|
| r6g.16xlarge AWS Graviton2 Processor | 64 | 512 GiB | $3.23 | -20% |
| r7g.16xlarge AWS Graviton3 Processor | 64 | 512 GiB | $3.43 | -15% |
| r5a.16xlarge AMD EPYC 7571 | 64 | 512 GiB | $3.62 | -10% |
| r6a.16xlarge AMD EPYC 7R13 Processor | 64 | 512 GiB | $3.63 | -10% |
| r6gd.16xlarge AWS Graviton2 Processor | 64 | 512 GiB | $3.69 | -9% |
| r8g.16xlarge AWS Graviton4 Processor | 64 | 512 GiB | $3.77 | -6% |
Cost calculator
Specs
| vCPU | 64 |
|---|---|
| Memory | 512 GiB (8.0 per vCPU) |
| Processor | Intel Xeon 8375C (Ice Lake) |
| Clock | 3.5 GHz |
| Storage | EBS only |
| Network | 25000 Megabit |
r6i sizes
| r6i.large | 2 vCPU | $0.1260 |
| r6i.xlarge | 4 vCPU | $0.2520 |
| r6i.2xlarge | 8 vCPU | $0.5040 |
| r6i.4xlarge | 16 vCPU | $1.01 |
| r6i.8xlarge | 32 vCPU | $2.02 |
| r6i.12xlarge | 48 vCPU | $3.02 |
| r6i.16xlarge | 64 vCPU | $4.03 |
| r6i.24xlarge | 96 vCPU | $6.05 |
| r6i.32xlarge | 128 vCPU | $8.06 |