r5b.12xlarge

r5b.12xlarge is an AWS EC2 instance with 48 vCPUs, 384 GiB memory (Intel Xeon Platinum 8259 (Cascade Lake)). In US East (N. Virginia) it costs $3.576 per hour on demand ($2,610.48 per month) for Linux; a 1-year reserved instance with no upfront costs $2.253 per hour, 37% less. Spot capacity is about $1.233 per hour. It is sold in 14 regions.

Prices by region

USD per hour, Linux. Reserved prices are no upfront, standard. Cheapest on-demand first.

RegionOn-demandSpot1-yr reserved3-yr reserved1-yr savings plan3-yr savings plan
US East (N. Virginia) us-east-1$3.576$1.233$2.253$1.448$2.591$1.668
US East (Ohio) us-east-2$3.576$1.269$2.253$1.448$2.591$1.668
US West (Oregon) us-west-2$3.576$1.581$2.253$1.448$2.591$1.668
EU (Stockholm) eu-north-1$3.791$0.3791$2.388$1.535$2.746$1.768
Canada (Central) ca-central-1$3.912$1.019$2.47$1.516$2.86$1.827
EU (Ireland) eu-west-1$4.008$1.546$2.525$1.645$2.954$1.892
EU (Milan) eu-south-1$4.20$0.8014$2.646$1.701$3.043$1.96
EU (London) eu-west-2$4.20$0.9602$2.659$1.775$3.087$1.983
Asia Pacific (Seoul) ap-northeast-2$4.272$1.052$2.691$1.772$3.127$2.039
Asia Pacific (Singapore) ap-southeast-1$4.272$0.8183$2.691$1.762$3.127$2.025
EU (Frankfurt) eu-central-1$4.272$1.039$2.691$1.762$3.127$2.025
Asia Pacific (Tokyo) ap-northeast-1$4.344$0.7801$2.737$1.788$3.216$2.055
Asia Pacific (Sydney) ap-southeast-2$4.344$1.293$2.737$1.759$3.166$2.027
South America (Sao Paulo) sa-east-1$5.688$0.5688$3.583$2.343$4.201$2.668
Reserved and Savings PlansSpot prices by regionWindows prices by regionAzure equivalents

Prices by operating system in US East (N. Virginia)

Operating systemOn-demand /hr1-yr reserved /hr3-yr reserved /hr
Linux$3.576$2.253$1.448
Ubuntu Pro$3.66––
SUSE$3.701$2.313$1.502
RHEL$4.094$2.771$1.967
Linux SQL Web$4.387$3.064$2.26
RHEL HA$4.766$3.443$2.639
RHEL SQL Web$4.906––
Windows$5.784$4.461$3.656
Windows SQL Web$6.595$5.272$4.468
Linux SQL Std$9.336$8.013$7.208
RHEL SQL Std$9.854––
RHEL HA SQL Std$10.526––
Windows SQL Std$11.544$10.221$9.416
Linux SQL Ent$21.576$20.253$19.448
RHEL SQL Ent$22.094––
RHEL HA SQL Ent$22.766––
Windows SQL Ent$23.784$22.461$21.656

Specs

ComputeValue
vCPUs48
Physical cores24
Threads per core2
Architecturex86_64
ProcessorIntel Xeon Platinum 8259 (Cascade Lake)
CPU makerIntel
Clock speed3.1 GHz
Sustained clock3.1 GHz
Processor featuresIntel AVX; Intel AVX2; Intel AVX512; Intel Turbo
BurstableNo
MemoryValue
Memory (GiB)384
NetworkingValue
Network10 Gbps
Network baseline12 Gbps
Network peak12 Gbps
Enhanced networkingYes (ENA)
EFANo
IPv6Yes
Max network interfaces8
IPv4 addresses per interface30
StorageValue
StorageEBS only
EBS optimizedYes
EBS over NVMeRequired
EBS throughput30 Gbps
EBS baseline bandwidth30,000 Mbps
EBS max bandwidth30,000 Mbps
EBS baseline throughput3,750 MB/s
EBS max throughput3,750 MB/s
EBS baseline IOPS130,000
EBS max IOPS130,000
Max EBS volumes27
Instance detailsValue
Instance typer5b.12xlarge
Familyr5b
CategoryMemory optimized
Current generationYes
Normalization factor96
Bare metalNo
HypervisorNitro
Placement groupsCluster, Partition, Spread
HibernationNo
Nitro EnclavesYes
Boot modesLegacy BIOS, UEFI

Compare r5b.12xlarge

With or without local disk and networking

vs r5.12xlarge

Other generations

vs r8ib.12xlarge

Other r5b sizes

SizevCPUsMemory (GiB)On-demand /hr
r5b.large216$0.149
r5b.xlarge432$0.298
r5b.2xlarge864$0.596
r5b.4xlarge16128$1.192
r5b.8xlarge32256$2.384
r5b.12xlarge48384$3.576
r5b.16xlarge64512$4.768
r5b.24xlarge96768$7.152
r5b.metal96768$7.152

Prices updated 2026-11-12 from AWS public price lists. Compare all AWS EC2 instances.