r5b.4xlargevsr8ib.4xlarge

r5b.4xlarge is 29% cheaper than r8ib.4xlarge on demand in US East (N. Virginia), saving $351.57 a month.

At a glancer5b.4xlarger8ib.4xlarge
On-demand$1.192/hr29% less$1.674/hr
Lowest rate$0.4994/hr45% lessSpot, can be interrupted$0.9002/hrSpot, can be interrupted
Size16 vCPUs, 128 GiB16 vCPUs, 128 GiB
ProcessorIntel Xeon Platinum 8259 (Cascade Lake)Intel 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.

Optionr5b.4xlarger8ib.4xlarger8ib.4xlarge vs r5b.4xlarge
On-demandPay by the hour$1.192$1.674▲ 40%
SpotCan be interrupted58% off$0.499446% off$0.9002▲ 80%
1-yr reservedNo upfront37% off$0.751——
3-yr reservedNo upfront59% off$0.4828——
1-yr savings planHourly commitment28% off$0.863628% off$1.212▲ 40%
3-yr savings planHourly commitment53% off$0.556153% off$0.7808▲ 40%

Key differences

The biggest lead each one has.

Where r5b.4xlarge leads
On-demand price$1.192 vs $1.674 per hour
29% cheaper
Where r8ib.4xlarge leads
Network peak33.333 Gbps vs 10 Gbps
3.3× higher
EBS max IOPS120,000 vs 43,333
2.8× higher
Clock speed3.9 GHz vs 3.1 GHz
26% higher

Specs

18 of 40 specs differ. Those are in bold.

Compute4 of 10 differr5b.4xlarger8ib.4xlarge
vCPUs1616
Physical cores88
Threads per core22
Architecturex86_64x86_64
ProcessorIntel Xeon Platinum 8259 (Cascade Lake)Intel Xeon Scalable (Granite Rapids)
CPU makerIntelIntel
Clock speed3.1 GHz3.9 GHz
Sustained clock3.1 GHz3.9 GHz
Processor featuresIntel AVX; Intel AVX2; Intel AVX512; Intel TurboIntel AVX; Intel AVX2; Intel AVX512; Intel Turbo; Intel AMX
BurstableNoNo
MemoryAll 1 matchr5b.4xlarger8ib.4xlarge
Memory (GiB)128128
Networking4 of 8 differr5b.4xlarger8ib.4xlarge
NetworkUp to 10 GigabitUp to 33.33 Gigabit
Network baseline5 Gbps16.666 Gbps
Network peak10 Gbps33.333 Gbps
Enhanced networkingYes (ENA)Yes (ENA)
EFANoNo
IPv6YesYes
Max network interfaces88
IPv4 addresses per interface3050
Storage8 of 11 differr5b.4xlarger8ib.4xlarge
StorageEBS onlyEBS only
EBS optimizedYesYes
EBS over NVMeRequiredRequired
EBS throughput10 GbpsUp to 25000 Mbps
EBS baseline bandwidth10,000 Mbps12,500 Mbps
EBS max bandwidth10,000 Mbps25,000 Mbps
EBS baseline throughput1,250 MB/s1,562.5 MB/s
EBS max throughput1,250 MB/s3,125 MB/s
EBS baseline IOPS43,33360,000
EBS max IOPS43,333120,000
Max EBS volumes2732
Instance details2 of 10 differr5b.4xlarger8ib.4xlarge
Familyr5br8ib
CategoryMemory optimizedMemory optimized
Current generationYesYes
Normalization factor3232
Bare metalNoNo
HypervisorNitroNitro
Placement groupsCluster, Partition, SpreadCluster, Partition, Spread
HibernationNoYes
Nitro EnclavesYesYes
Boot modesLegacy BIOS, UEFILegacy BIOS, UEFI

On-demand prices by region

Cheapest for r5b.4xlarge first. Linux, USD per hour.

Regionr5b.4xlarger8ib.4xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$1.192$1.674▲ 40%
US East (Ohio)us-east-2$1.192$1.674▲ 40%
US West (Oregon)us-west-2$1.192$1.674▲ 40%
EU (Ireland)eu-west-1$1.336$1.876▲ 40%
EU (Frankfurt)eu-central-1$1.424$1.999▲ 40%
Asia Pacific (Tokyo)ap-northeast-1$1.448$2.033▲ 40%

Keep exploring

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

r5b.4xlargeMemory optimized, r5b family
r5b.4xlarge prices and specsEvery size in the r5b family

Compare r5b.4xlarge with

r5.4xlarge
r8ib.4xlargeMemory optimized, r8ib family
r8ib.4xlarge prices and specsEvery size in the r8ib family

Compare r8ib.4xlarge with

r8i.4xlargem8ib.4xlargec8ib.4xlarger8gb.4xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 53–59% below on-demand. Connect your cloud accounts to unlock greater savings with commitment protection.

Connect AWS account

AWS EC2 Linux prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.