r5.12xlargevsr5a.12xlarge

r5a.12xlarge is 10% cheaper than r5.12xlarge on demand in US East (N. Virginia), saving $227.76 a month.

At a glancer5.12xlarger5a.12xlarge
On-demand$3.024/hr$2.712/hr10% less
Lowest rate$0.7262/hr15% lessSpot, can be interrupted$0.8553/hrSpot, can be interrupted
Size48 vCPUs, 384 GiB48 vCPUs, 384 GiB
ProcessorIntel Xeon Platinum 8175AMD 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.

Optionr5.12xlarger5a.12xlarger5a.12xlarge vs r5.12xlarge
On-demandPay by the hour$3.024$2.712▼ 10%
SpotCan be interrupted76% off$0.726268% off$0.8553▲ 18%
1-yr reservedNo upfront37% off$1.90537% off$1.709▼ 10%
3-yr reservedNo upfront57% off$1.30657% off$1.172▼ 10%
1-yr savings planHourly commitment28% off$2.19127% off$1.971▼ 10%
3-yr savings planHourly commitment48% off$1.57748% off$1.415▼ 10%

Key differences

The biggest lead each one has.

Where r5.12xlarge leads
EBS baseline bandwidth9,500 Mbps vs 6,780 Mbps
40% higher
Clock speed3.1 GHz vs 2.5 GHz
24% higher
Network baseline12 Gbps vs 10 Gbps
20% higher
Where r5a.12xlarge leads
On-demand price$2.712 vs $3.024 per hour
10% cheaper

Specs

16 of 41 specs differ. Those are in bold.

Compute6 of 11 differr5.12xlarger5a.12xlarge
vCPUs4848
Physical cores2424
Threads per core22
Architecturex86_64x86_64
ProcessorIntel Xeon Platinum 8175AMD EPYC 7571
CPU makerIntelAMD
Clock speed3.1 GHz2.5 GHz
Sustained clock3.1 GHz2.5 GHz
Processor featuresIntel AVX; Intel AVX2; Intel AVX512; Intel TurboAVX; AVX2; AMD Turbo
BurstableNoNo
ECU168–
MemoryAll 1 matchr5.12xlarger5a.12xlarge
Memory (GiB)384384
Networking2 of 8 differr5.12xlarger5a.12xlarge
Network10 Gigabit10 Gigabit
Network baseline12 Gbps10 Gbps
Network peak12 Gbps10 Gbps
Enhanced networkingYes (ENA)Yes (ENA)
EFANoNo
IPv6YesYes
Max network interfaces88
IPv4 addresses per interface3030
Storage7 of 11 differr5.12xlarger5a.12xlarge
StorageEBS onlyEBS only
EBS optimizedYesYes
EBS over NVMeRequiredRequired
EBS throughput9500 Mbps5000 Mbps
EBS baseline bandwidth9,500 Mbps6,780 Mbps
EBS max bandwidth9,500 Mbps6,780 Mbps
EBS baseline throughput1,187.5 MB/s847.5 MB/s
EBS max throughput1,187.5 MB/s847.5 MB/s
EBS baseline IOPS40,00030,000
EBS max IOPS40,00030,000
Max EBS volumes2727
Instance details1 of 10 differr5.12xlarger5a.12xlarge
Familyr5r5a
CategoryMemory optimizedMemory optimized
Current generationYesYes
Normalization factor9696
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 r5.12xlarge first. Linux, USD per hour.

Regionr5.12xlarger5a.12xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$3.024$2.712▼ 10%
US East (Ohio)us-east-2$3.024$2.712▼ 10%
US West (Oregon)us-west-2$3.024$2.712▼ 10%
Asia Pacific (Mumbai)ap-south-1$3.12$1.716▼ 45%
Canada (Central)ca-central-1$3.312$2.976▼ 10%
US West (N. California)us-west-1$3.36$3.024▼ 10%
EU (Ireland)eu-west-1$3.384$3.048▼ 10%
EU (London)eu-west-2$3.552$3.192▼ 10%
EU (Milan)eu-south-1$3.552$3.192▼ 10%
EU (Paris)eu-west-3$3.552$3.192▼ 10%
Asia Pacific (Sydney)ap-southeast-2$3.624$3.264▼ 10%
AWS GovCloud (US-East)us-gov-east-1$3.624$3.264▼ 10%
AWS GovCloud (US-West)us-gov-west-1$3.624$3.264▼ 10%
Asia Pacific (Seoul)ap-northeast-2$3.648$3.264▼ 11%
Asia Pacific (Singapore)ap-southeast-1$3.648$3.264▼ 11%
Asia Pacific (Tokyo)ap-northeast-1$3.648$3.288▼ 10%
EU (Frankfurt)eu-central-1$3.648$3.288▼ 10%
South America (Sao Paulo)sa-east-1$4.824$4.344▼ 10%

Keep exploring

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

r5.12xlargeMemory optimized, r5 family
r5.12xlarge prices and specsEvery size in the r5 family

Compare r5.12xlarge with

c5.12xlargem5.12xlarger5d.12xlarger5dn.12xlarger5n.12xlarger5b.12xlarger6i.12xlarge
r5a.12xlargeMemory optimized, r5a family
r5a.12xlarge prices and specsEvery size in the r5a family

Compare r5a.12xlarge with

c5a.12xlargem5a.12xlarger5ad.12xlarger6a.12xlarge

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.