r8a.8xlargevsr8g.8xlarge

r8g.8xlarge is 26% cheaper than r8a.8xlarge on demand in US East (N. Virginia), saving $489.90 a month. They use different processor architectures (x86_64 and arm64), so software built for one may need rebuilding to run on the other.

At a glancer8a.8xlarger8g.8xlarge
On-demand$2.556/hr$1.885/hr26% less
Lowest rate$0.6218/hrSpot, can be interrupted$0.4016/hr35% lessSpot, can be interrupted
Size32 vCPUs, 256 GiB32 vCPUs, 256 GiB
ProcessorAMD EPYC 9R45 ProcessorAWS Graviton4 Processor
Architecturex86_64arm64

Prices in US East (N. Virginia)

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

Optionr8a.8xlarger8g.8xlarger8g.8xlarge vs r8a.8xlarge
On-demandPay by the hour$2.556$1.885▼ 26%
SpotCan be interrupted76% off$0.621879% off$0.4016▼ 35%
1-yr reservedNo upfront—34% off$1.247—
3-yr reservedNo upfront—55% off$0.8551—
1-yr savings planHourly commitment28% off$1.85228% off$1.366▼ 26%
3-yr savings planHourly commitment48% off$1.33348% off$0.9834▼ 26%

Key differences

The biggest lead each one has.

Where r8a.8xlarge leads
Clock speedUp to 4.5 GHz vs 2.7 GHz
67% higher
IPv4 addresses per interface40 vs 30
33% higher
Where r8g.8xlarge leads
On-demand price$1.885 vs $2.556 per hour
26% cheaper

Specs

11 of 40 specs differ. Those are in bold.

Compute6 of 10 differr8a.8xlarger8g.8xlarge
vCPUs3232
Physical cores3232
Threads per core11
Architecturex86_64arm64
ProcessorAMD EPYC 9R45 ProcessorAWS Graviton4 Processor
CPU makerAMDAWS
Clock speedUp to 4.5 GHz2.7 GHz
Sustained clock4.5 GHz2.8 GHz
Processor featuresAMD Turbo; AVX; AVX2; AVX512–
BurstableNoNo
MemoryAll 1 matchr8a.8xlarger8g.8xlarge
Memory (GiB)256256
Networking3 of 8 differr8a.8xlarger8g.8xlarge
Network15000 Megabit15 Gigabit
Network baseline15 Gbps15 Gbps
Network peak15 Gbps15 Gbps
Enhanced networkingYes (ENA)Yes (ENA)
EFANoNo
IPv6YesYes
Max network interfaces108
IPv4 addresses per interface4030
StorageAll 11 matchr8a.8xlarger8g.8xlarge
StorageEBS onlyEBS only
EBS optimizedYesYes
EBS over NVMeRequiredRequired
EBS throughput10000 Mbps10000 Mbps
EBS baseline bandwidth10,000 Mbps10,000 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput1,250 MB/s1,250 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS40,00040,000
EBS max IOPS40,00040,000
Max EBS volumes3232
Instance details2 of 10 differr8a.8xlarger8g.8xlarge
Familyr8ar8g
CategoryMemory optimizedMemory optimized
Current generationYesYes
Normalization factor6464
Bare metalNoNo
HypervisorNitroNitro
Placement groupsCluster, Partition, SpreadCluster, Partition, Spread
HibernationNoNo
Nitro EnclavesYesYes
Boot modesLegacy BIOS, UEFIUEFI

On-demand prices by region

Cheapest for r8a.8xlarge first. Linux, USD per hour.

Regionr8a.8xlarger8g.8xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$2.556$1.885▼ 26%
US East (Ohio)us-east-2$2.556$1.885▼ 26%
US West (Oregon)us-west-2$2.556$1.885▼ 26%
Canada (Central)ca-central-1$2.80$2.065▼ 26%
EU (Ireland)eu-west-1$2.86$2.109▼ 26%
Europe (Spain)eu-south-2$2.86$2.108▼ 26%
Asia Pacific (Tokyo)ap-northeast-1$3.083$2.274▼ 26%
EU (Frankfurt)eu-central-1$3.083$2.274▼ 26%

Keep exploring

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

r8a.8xlargeMemory optimized, r8a family
r8a.8xlarge prices and specsEvery size in the r8a family

Compare r8a.8xlarge with

r8i.8xlargec8a.8xlargem8a.8xlarger7a.8xlarge
r8g.8xlargeMemory optimized, r8g family
r8g.8xlarge prices and specsEvery size in the r8g family

Compare r8g.8xlarge with

c8g.8xlargem8g.8xlarger8gd.8xlarger8i.8xlarger8gb.8xlarger8gn.8xlarger7g.8xlarger9g.8xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 48–55% 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.