r5.12xlargevsr5b.12xlarge

r5.12xlarge is 15% cheaper than r5b.12xlarge on demand in US East (N. Virginia), saving $402.96 a month.

At a glancer5.12xlarger5b.12xlarge
On-demand$3.024/hr15% less$3.576/hr
Lowest rate$0.7262/hr41% lessSpot, can be interrupted$1.233/hrSpot, can be interrupted
Size48 vCPUs, 384 GiB48 vCPUs, 384 GiB
ProcessorIntel Xeon Platinum 8175Intel Xeon Platinum 8259 (Cascade Lake)
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.

Optionr5.12xlarger5b.12xlarger5b.12xlarge vs r5.12xlarge
On-demandPay by the hour$3.024$3.576▲ 18%
SpotCan be interrupted76% off$0.726266% off$1.233▲ 70%
1-yr reservedNo upfront37% off$1.90537% off$2.253▲ 18%
3-yr reservedNo upfront57% off$1.30659% off$1.448▲ 11%
1-yr savings planHourly commitment28% off$2.19128% off$2.591▲ 18%
3-yr savings planHourly commitment48% off$1.57753% off$1.668▲ 6%

Key differences

The biggest lead each one has.

Where r5.12xlarge leads
On-demand price$3.024 vs $3.576 per hour
15% cheaper
Where r5b.12xlarge leads
EBS baseline IOPS130,000 vs 40,000
3.3× higher

Specs

10 of 41 specs differ. Those are in bold.

Compute2 of 11 differr5.12xlarger5b.12xlarge
vCPUs4848
Physical cores2424
Threads per core22
Architecturex86_64x86_64
ProcessorIntel Xeon Platinum 8175Intel Xeon Platinum 8259 (Cascade Lake)
CPU makerIntelIntel
Clock speed3.1 GHz3.1 GHz
Sustained clock3.1 GHz3.1 GHz
Processor featuresIntel AVX; Intel AVX2; Intel AVX512; Intel TurboIntel AVX; Intel AVX2; Intel AVX512; Intel Turbo
BurstableNoNo
ECU168–
MemoryAll 1 matchr5.12xlarger5b.12xlarge
Memory (GiB)384384
NetworkingAll 8 matchr5.12xlarger5b.12xlarge
Network10 Gigabit10 Gigabit
Network baseline12 Gbps12 Gbps
Network peak12 Gbps12 Gbps
Enhanced networkingYes (ENA)Yes (ENA)
EFANoNo
IPv6YesYes
Max network interfaces88
IPv4 addresses per interface3030
Storage7 of 11 differr5.12xlarger5b.12xlarge
StorageEBS onlyEBS only
EBS optimizedYesYes
EBS over NVMeRequiredRequired
EBS throughput9500 Mbps30 Gbps
EBS baseline bandwidth9,500 Mbps30,000 Mbps
EBS max bandwidth9,500 Mbps30,000 Mbps
EBS baseline throughput1,187.5 MB/s3,750 MB/s
EBS max throughput1,187.5 MB/s3,750 MB/s
EBS baseline IOPS40,000130,000
EBS max IOPS40,000130,000
Max EBS volumes2727
Instance details1 of 10 differr5.12xlarger5b.12xlarge
Familyr5r5b
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.

Regionr5.12xlarger5b.12xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$3.024$3.576▲ 18%
US East (Ohio)us-east-2$3.024$3.576▲ 18%
US West (Oregon)us-west-2$3.024$3.576▲ 18%
EU (Stockholm)eu-north-1$3.216$3.791▲ 18%
Canada (Central)ca-central-1$3.312$3.912▲ 18%
EU (Ireland)eu-west-1$3.384$4.008▲ 18%
EU (London)eu-west-2$3.552$4.20▲ 18%
EU (Milan)eu-south-1$3.552$4.20▲ 18%
Asia Pacific (Sydney)ap-southeast-2$3.624$4.344▲ 20%
Asia Pacific (Seoul)ap-northeast-2$3.648$4.272▲ 17%
Asia Pacific (Singapore)ap-southeast-1$3.648$4.272▲ 17%
Asia Pacific (Tokyo)ap-northeast-1$3.648$4.344▲ 19%
EU (Frankfurt)eu-central-1$3.648$4.272▲ 17%
South America (Sao Paulo)sa-east-1$4.824$5.688▲ 18%

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.12xlarger5a.12xlarger6i.12xlarge
r5b.12xlargeMemory optimized, r5b family
r5b.12xlarge prices and specsEvery size in the r5b family

Compare r5b.12xlarge with

r8ib.12xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 57–59% 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.