r8i-flex.16xlargevsr8i.16xlarge

r8i-flex.16xlarge is 5% cheaper than r8i.16xlarge on demand in US East (N. Virginia), saving $162.35 a month.

At a glancer8i-flex.16xlarger8i.16xlarge
On-demand$4.223/hr5% less$4.445/hr
Lowest rate$1.038/hrSpot, can be interrupted$0.8961/hr14% lessSpot, can be interrupted
Size64 vCPUs, 512 GiB64 vCPUs, 512 GiB
ProcessorIntel Xeon Scalable (Granite Rapids)Intel Xeon Scalable (Granite Rapids)
Architecturex86_64x86_64

Prices in US East (N. Virginia)

“Off” is the discount against each type’s own on-demand price. Linux, USD per hour.

Optionr8i-flex.16xlarger8i.16xlarger8i.16xlarge vs r8i-flex.16xlarge
On-demandPay by the hour$4.223$4.445▲ 5%
SpotCan be interrupted75% off$1.03880% off$0.8961▼ 14%
1-yr savings planHourly commitment28% off$3.0628% off$3.221▲ 5%
3-yr savings planHourly commitment48% off$2.20348% off$2.319▲ 5%

Key differences

The biggest lead each one has.

Where r8i-flex.16xlarge leads
On-demand price$4.223 vs $4.445 per hour
5% cheaper
Where r8i.16xlarge leads
Network baseline30 Gbps vs 15 Gbps
2× higher
EBS baseline bandwidth20,000 Mbps vs 10,000 Mbps
2× higher

Specs

9 of 40 specs differ. Those are in bold.

ComputeAll 10 matchr8i-flex.16xlarger8i.16xlarge
vCPUs6464
Physical cores3232
Threads per core22
Architecturex86_64x86_64
ProcessorIntel Xeon Scalable (Granite Rapids)Intel Xeon Scalable (Granite Rapids)
CPU makerIntelIntel
Clock speed3.9 GHz3.9 GHz
Sustained clock3.9 GHz3.9 GHz
Processor featuresIntel AVX; Intel AVX2; Intel AVX512; Intel Turbo; Intel AMXIntel AVX; Intel AVX2; Intel AVX512; Intel Turbo; Intel AMX
BurstableNoNo
MemoryAll 1 matchr8i-flex.16xlarger8i.16xlarge
Memory (GiB)512512
Networking2 of 8 differr8i-flex.16xlarger8i.16xlarge
NetworkUp to 30000 Megabit30000 Megabit
Network baseline15 Gbps30 Gbps
Network peak30 Gbps30 Gbps
Enhanced networkingYes (ENA)Yes (ENA)
EFANoNo
IPv6YesYes
Max network interfaces1616
IPv4 addresses per interface6464
Storage4 of 11 differr8i-flex.16xlarger8i.16xlarge
StorageEBS onlyEBS only
EBS optimizedYesYes
EBS over NVMeRequiredRequired
EBS throughputUp to 20000 Mbps20000 Mbps
EBS baseline bandwidth10,000 Mbps20,000 Mbps
EBS max bandwidth20,000 Mbps20,000 Mbps
EBS baseline throughput1,250 MB/s2,500 MB/s
EBS max throughput2,500 MB/s2,500 MB/s
EBS baseline IOPS40,00080,000
EBS max IOPS80,00080,000
Max EBS volumes4848
Instance details3 of 10 differr8i-flex.16xlarger8i.16xlarge
Familyr8i-flexr8i
CategoryMemory optimizedMemory optimized
Current generationYesYes
Normalization factor128128
Bare metalNoNo
HypervisorNitroNitro
Placement groupsPartition, SpreadCluster, Partition, Spread
HibernationNoNo
Nitro EnclavesNoYes
Boot modesLegacy BIOS, UEFILegacy BIOS, UEFI

On-demand prices by region

Cheapest for r8i-flex.16xlarge first. Linux, USD per hour.

Regionr8i-flex.16xlarger8i.16xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$4.223$4.445▲ 5%
US East (Ohio)us-east-2$4.223$4.445▲ 5%
US West (Oregon)us-west-2$4.223$4.445▲ 5%
Asia Pacific (Malaysia)ap-southeast-5$4.33$4.558▲ 5%
Asia Pacific (Hyderabad)ap-south-2$4.357$4.587▲ 5%
Asia Pacific (Mumbai)ap-south-1$4.357$4.587▲ 5%
EU (Stockholm)eu-north-1$4.491$4.728▲ 5%
Canada (Central)ca-central-1$4.625$4.869▲ 5%
Canada West (Calgary)ca-west-1$4.625$4.869▲ 5%
US West (N. California)us-west-1$4.692$4.939▲ 5%
EU (Ireland)eu-west-1$4.726$4.974▲ 5%
Europe (Spain)eu-south-2$4.726$4.974▲ 5%
EU (London)eu-west-2$4.96$5.221▲ 5%
EU (Milan)eu-south-1$4.96$5.221▲ 5%
EU (Paris)eu-west-3$4.96$5.221▲ 5%
Asia Pacific (Sydney)ap-southeast-2$5.061$5.327▲ 5%
AWS GovCloud (US-East)us-gov-east-1$5.061$5.327▲ 5%
AWS GovCloud (US-West)us-gov-west-1$5.061$5.327▲ 5%
Asia Pacific (Seoul)ap-northeast-2$5.094$5.363▲ 5%
Asia Pacific (Singapore)ap-southeast-1$5.094$5.363▲ 5%
Asia Pacific (Tokyo)ap-northeast-1$5.094$5.363▲ 5%
EU (Frankfurt)eu-central-1$5.094$5.363▲ 5%
Middle East (UAE)me-central-1$5.198$5.472▲ 5%
Asia Pacific (New Zealand)ap-southeast-6$5.314$5.594▲ 5%
Europe (Zurich)eu-central-2$5.604$5.899▲ 5%
Africa (Cape Town)af-south-1$5.631$5.927▲ 5%
South America (Sao Paulo)sa-east-1$6.737$7.091▲ 5%

Keep exploring

Each type’s own page, and how it compares with others.

r8i-flex.16xlargeMemory optimized, r8i-flex family
r8i-flex.16xlarge prices and specsEvery size in the r8i-flex family

Compare r8i-flex.16xlarge with

c8i-flex.16xlargem8i-flex.16xlarge
r8i.16xlargeMemory optimized, r8i family
r8i.16xlarge prices and specsEvery size in the r8i family

Compare r8i.16xlarge with

c8i.16xlargem8i.16xlarger8g.16xlarger8a.16xlarger8ib.16xlarger8id.16xlarger8idb.16xlarger8idn.16xlarger8in.16xlarger7i.16xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 48% below on-demand. Connect your cloud accounts to unlock greater savings with commitment protection.

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AWS EC2 Linux prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.