c8a.16xlargevsc8i.16xlarge

c8i.16xlarge is 13% cheaper than c8a.16xlarge on demand in US East (N. Virginia), saving $328.43 a month.

At a glancec8a.16xlargec8i.16xlarge
On-demand$3.449/hr$2.999/hr13% less
Lowest rate$0.7543/hr9% lessSpot, can be interrupted$0.832/hrSpot, can be interrupted
Size64 vCPUs, 128 GiB64 vCPUs, 128 GiB
ProcessorAMD EPYC 9R45 ProcessorIntel 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.

Optionc8a.16xlargec8i.16xlargec8i.16xlarge vs c8a.16xlarge
On-demandPay by the hour$3.449$2.999▼ 13%
SpotCan be interrupted78% off$0.754372% off$0.832▲ 10%
1-yr savings planHourly commitment28% off$2.49228% off$2.167▼ 13%
3-yr savings planHourly commitment52% off$1.66552% off$1.448▼ 13%

Key differences

The biggest lead each one has.

Where c8a.16xlarge leads
Physical cores64 vs 32
2× higher
Where c8i.16xlarge leads
On-demand price$2.999 vs $3.449 per hour
13% cheaper

Specs

8 of 40 specs differ. Those are in bold.

Compute7 of 10 differc8a.16xlargec8i.16xlarge
vCPUs6464
Physical cores6432
Threads per core12
Architecturex86_64x86_64
ProcessorAMD EPYC 9R45 ProcessorIntel Xeon Scalable (Granite Rapids)
CPU makerAMDIntel
Clock speedUp to 4.5 GHz3.9 GHz
Sustained clock4.5 GHz3.9 GHz
Processor featuresAMD Turbo; AVX; AVX2; AVX512Intel AVX; Intel AVX2; Intel AVX512; Intel Turbo; Intel AMX
BurstableNoNo
MemoryAll 1 matchc8a.16xlargec8i.16xlarge
Memory (GiB)128128
NetworkingAll 8 matchc8a.16xlargec8i.16xlarge
Network30000 Megabit30000 Megabit
Network baseline30 Gbps30 Gbps
Network peak30 Gbps30 Gbps
Enhanced networkingYes (ENA)Yes (ENA)
EFANoNo
IPv6YesYes
Max network interfaces1616
IPv4 addresses per interface6464
StorageAll 11 matchc8a.16xlargec8i.16xlarge
StorageEBS onlyEBS only
EBS optimizedYesYes
EBS over NVMeRequiredRequired
EBS throughput20000 Mbps20000 Mbps
EBS baseline bandwidth20,000 Mbps20,000 Mbps
EBS max bandwidth20,000 Mbps20,000 Mbps
EBS baseline throughput2,500 MB/s2,500 MB/s
EBS max throughput2,500 MB/s2,500 MB/s
EBS baseline IOPS80,00080,000
EBS max IOPS80,00080,000
Max EBS volumes4848
Instance details1 of 10 differc8a.16xlargec8i.16xlarge
Familyc8ac8i
CategoryCompute optimizedCompute optimized
Current generationYesYes
Normalization factor128128
Bare metalNoNo
HypervisorNitroNitro
Placement groupsCluster, Partition, SpreadCluster, Partition, Spread
HibernationYesYes
Nitro EnclavesYesYes
Boot modesLegacy BIOS, UEFILegacy BIOS, UEFI

On-demand prices by region

Cheapest for c8a.16xlarge first. Linux, USD per hour.

Regionc8a.16xlargec8i.16xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$3.449$2.999▼ 13%
US East (Ohio)us-east-2$3.449$2.999▼ 13%
US West (Oregon)us-west-2$3.449$2.999▼ 13%
Europe (Spain)eu-south-2$3.70$3.217▼ 13%
EU (Ireland)eu-west-1$3.70$3.218▼ 13%
EU (Frankfurt)eu-central-1$3.936$3.422▼ 13%
Asia Pacific (Tokyo)ap-northeast-1$4.341$3.775▼ 13%

Keep exploring

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

c8a.16xlargeCompute optimized, c8a family
c8a.16xlarge prices and specsEvery size in the c8a family

Compare c8a.16xlarge with

c8g.16xlarger8a.16xlargem8a.16xlargec7a.16xlarge
c8i.16xlargeCompute optimized, c8i family
c8i.16xlarge prices and specsEvery size in the c8i family

Compare c8i.16xlarge with

c8g.16xlargec8i-flex.16xlargem8i.16xlarger8i.16xlargec8id.16xlargec8in.16xlargec8ib.16xlargec7i.16xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 52% 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.