c5a.16xlargevsr5a.16xlarge

c5a.16xlarge is 32% cheaper than r5a.16xlarge on demand in US East (N. Virginia), saving $840.96 a month.

At a glancec5a.16xlarger5a.16xlarge
On-demand$2.464/hr32% less$3.616/hr
Lowest rate$0.7715/hr29% lessSpot, can be interrupted$1.092/hrSpot, can be interrupted
Size64 vCPUs, 128 GiB64 vCPUs, 512 GiB
ProcessorAMD EPYC 7R32AMD EPYC 7571
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.

Optionc5a.16xlarger5a.16xlarger5a.16xlarge vs c5a.16xlarge
On-demandPay by the hour$2.464$3.616▲ 47%
SpotCan be interrupted69% off$0.771570% off$1.092▲ 42%
1-yr reservedNo upfront37% off$1.55237% off$2.278▲ 47%
3-yr reservedNo upfront57% off$1.06457% off$1.562▲ 47%
1-yr savings planHourly commitment27% off$1.7927% off$2.627▲ 47%
3-yr savings planHourly commitment52% off$1.1948% off$1.886▲ 58%

Key differences

The biggest lead each one has.

Where c5a.16xlarge leads
On-demand price$2.464 vs $3.616 per hour
32% cheaper
Network baseline20 Gbps vs 12 Gbps
67% higher
Clock speed3.3 GHz vs 2.5 GHz
32% higher
Where r5a.16xlarge leads
Memory (GiB)512 vs 128
4× higher
EBS baseline bandwidth9,500 Mbps vs 6,300 Mbps
51% higher

Specs

17 of 40 specs differ. Those are in bold.

Compute4 of 10 differc5a.16xlarger5a.16xlarge
vCPUs6464
Physical cores3232
Threads per core22
Architecturex86_64x86_64
ProcessorAMD EPYC 7R32AMD EPYC 7571
CPU makerAMDAMD
Clock speed3.3 GHz2.5 GHz
Sustained clock3.3 GHz2.5 GHz
Processor featuresAMD Turbo; AVX; AVX2AVX; AVX2; AMD Turbo
BurstableNoNo
Memory1 of 1 differc5a.16xlarger5a.16xlarge
Memory (GiB)128512
Networking3 of 8 differc5a.16xlarger5a.16xlarge
Network20 Gigabit12 Gigabit
Network baseline20 Gbps12 Gbps
Network peak20 Gbps12 Gbps
Enhanced networkingYes (ENA)Yes (ENA)
EFANoNo
IPv6YesYes
Max network interfaces1515
IPv4 addresses per interface5050
Storage7 of 11 differc5a.16xlarger5a.16xlarge
StorageEBS onlyEBS only
EBS optimizedYesYes
EBS over NVMeRequiredRequired
EBS throughput6300 Mbps7000 Mbps
EBS baseline bandwidth6,300 Mbps9,500 Mbps
EBS max bandwidth6,300 Mbps9,500 Mbps
EBS baseline throughput787.5 MB/s1,187.5 MB/s
EBS max throughput787.5 MB/s1,187.5 MB/s
EBS baseline IOPS26,70040,000
EBS max IOPS26,70040,000
Max EBS volumes2727
Instance details2 of 10 differc5a.16xlarger5a.16xlarge
Familyc5ar5a
CategoryCompute optimizedMemory optimized
Current generationYesYes
Normalization factor128128
Bare metalNoNo
HypervisorNitroNitro
Placement groupsCluster, Partition, SpreadCluster, Partition, Spread
HibernationNoNo
Nitro EnclavesYesYes
Boot modesLegacy BIOS, UEFILegacy BIOS, UEFI

On-demand prices by region

Cheapest for c5a.16xlarge first. Linux, USD per hour.

Regionc5a.16xlarger5a.16xlargeDifference
Asia Pacific (Mumbai)ap-south-1$1.504$2.288▲ 52%
US East (N. Virginia)Used in summaryus-east-1$2.464$3.616▲ 47%
US East (Ohio)us-east-2$2.464$3.616▲ 47%
US West (Oregon)us-west-2$2.464$3.616▲ 47%
Canada (Central)ca-central-1$2.688$3.968▲ 48%
Asia Pacific (Seoul)ap-northeast-2$2.752$4.352▲ 58%
EU (Ireland)eu-west-1$2.752$4.064▲ 48%
EU (Frankfurt)eu-central-1$2.784$4.384▲ 57%
Asia Pacific (Singapore)ap-southeast-1$2.816$4.352▲ 55%
EU (London)eu-west-2$2.912$4.256▲ 46%
EU (Milan)eu-south-1$2.912$4.256▲ 46%
EU (Paris)eu-west-3$2.912$4.256▲ 46%
AWS GovCloud (US-East)us-gov-east-1$2.944$4.352▲ 48%
AWS GovCloud (US-West)us-gov-west-1$2.944$4.352▲ 48%
US West (N. California)us-west-1$3.04$4.032▲ 33%
Asia Pacific (Tokyo)ap-northeast-1$3.072$4.384▲ 43%
Asia Pacific (Sydney)ap-southeast-2$3.20$4.352▲ 36%
South America (Sao Paulo)sa-east-1$3.776$5.792▲ 53%

Keep exploring

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

c5a.16xlargeCompute optimized, c5a family
c5a.16xlarge prices and specsEvery size in the c5a family

Compare c5a.16xlarge with

c5ad.16xlargem5a.16xlargec6a.16xlarge
r5a.16xlargeMemory optimized, r5a family
r5a.16xlarge prices and specsEvery size in the r5a family

Compare r5a.16xlarge with

r5.16xlargem5a.16xlarger5ad.16xlarger6a.16xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 57% 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.