r5b.4xlarge

r5b.4xlarge is an AWS EC2 instance with 16 vCPUs, 128 GiB memory (Intel Xeon Platinum 8259 (Cascade Lake)). In US East (N. Virginia) it costs $1.192 per hour on demand ($870.16 per month) for Linux; a 1-year reserved instance with no upfront costs $0.751 per hour, 37% less. Spot capacity is about $0.4994 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.

Region	On-demand	Spot	1-yr reserved	3-yr reserved	1-yr savings plan	3-yr savings plan
US East (N. Virginia) us-east-1	$1.192	$0.4994	$0.751	$0.4828	$0.8636	$0.5561
US East (Ohio) us-east-2	$1.192	$0.4204	$0.751	$0.4828	$0.8636	$0.5561
US West (Oregon) us-west-2	$1.192	$0.4948	$0.751	$0.4828	$0.8636	$0.5561
EU (Stockholm) eu-north-1	$1.264	$0.1552	$0.796	$0.5117	$0.9154	$0.5895
Canada (Central) ca-central-1	$1.304	$0.4062	$0.8232	$0.5054	$0.9534	$0.6091
EU (Ireland) eu-west-1	$1.336	$0.5325	$0.8417	$0.5483	$0.9848	$0.6305
EU (Milan) eu-south-1	$1.40	$0.2559	$0.882	$0.567	$1.014	$0.6532
EU (London) eu-west-2	$1.40	$0.4577	$0.8863	$0.5918	$1.029	$0.6609
Asia Pacific (Seoul) ap-northeast-2	$1.424	$0.4511	$0.8971	$0.5906	$1.042	$0.6798
Asia Pacific (Singapore) ap-southeast-1	$1.424	$0.5473	$0.8971	$0.5875	$1.042	$0.6751
EU (Frankfurt) eu-central-1	$1.424	$0.4835	$0.8971	$0.5875	$1.042	$0.6751
Asia Pacific (Tokyo) ap-northeast-1	$1.448	$0.3683	$0.9122	$0.5958	$1.072	$0.685
Asia Pacific (Sydney) ap-southeast-2	$1.448	$0.5489	$0.9122	$0.5864	$1.055	$0.6756
South America (Sao Paulo) sa-east-1	$1.896	$0.211	$1.194	$0.781	$1.40	$0.8893

Reserved and Savings Plans Spot prices by region Windows prices by region Azure equivalents

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

Operating system	On-demand /hr	1-yr reserved /hr	3-yr reserved /hr
Linux	$1.192	$0.751	$0.4828
Ubuntu Pro	$1.22	–	–
SUSE	$1.317	$0.811	$0.5368
RHEL	$1.365	$0.9238	$0.6556
Linux SQL Web	$1.462	$1.021	$0.7532
RHEL HA	$1.589	$1.148	$0.8796
RHEL SQL Web	$1.635	–	–
Windows	$1.928	$1.487	$1.219
Windows SQL Web	$2.198	$1.757	$1.489
Linux SQL Std	$3.112	$2.671	$2.403
RHEL SQL Std	$3.285	–	–
RHEL HA SQL Std	$3.509	–	–
Windows SQL Std	$3.848	$3.407	$3.139
Linux SQL Ent	$7.192	$6.751	$6.483
RHEL SQL Ent	$7.365	–	–
RHEL HA SQL Ent	$7.589	–	–
Windows SQL Ent	$7.928	$7.487	$7.219

Specs

Compute	Value
vCPUs	16
Physical cores	8
Threads per core	2
Architecture	x86_64
Processor	Intel Xeon Platinum 8259 (Cascade Lake)
CPU maker	Intel
Clock speed	3.1 GHz
Sustained clock	3.1 GHz
Processor features	Intel AVX; Intel AVX2; Intel AVX512; Intel Turbo
Burstable	No

Memory	Value
Memory (GiB)	128

Networking	Value
Network	Up to 10 Gbps
Network baseline	5 Gbps
Network peak	10 Gbps
Enhanced networking	Yes (ENA)
EFA	No
IPv6	Yes
Max network interfaces	8
IPv4 addresses per interface	30

Storage	Value
Storage	EBS only
EBS optimized	Yes
EBS over NVMe	Required
EBS throughput	10 Gbps
EBS baseline bandwidth	10,000 Mbps
EBS max bandwidth	10,000 Mbps
EBS baseline throughput	1,250 MB/s
EBS max throughput	1,250 MB/s
EBS baseline IOPS	43,333
EBS max IOPS	43,333
Max EBS volumes	27

Instance details	Value
Instance type	r5b.4xlarge
Family	r5b
Category	Memory optimized
Current generation	Yes
Normalization factor	32
Bare metal	No
Hypervisor	Nitro
Placement groups	Cluster, Partition, Spread
Hibernation	No
Nitro Enclaves	Yes
Boot modes	Legacy BIOS, UEFI

Compare r5b.4xlarge

With or without local disk and networking

vs r5.4xlarge

Other generations

vs r8ib.4xlarge

Other r5b sizes

Size	vCPUs	Memory (GiB)	On-demand /hr
r5b.large	2	16	$0.149
r5b.xlarge	4	32	$0.298
r5b.2xlarge	8	64	$0.596
r5b.4xlarge	16	128	$1.192
r5b.8xlarge	32	256	$2.384
r5b.12xlarge	48	384	$3.576
r5b.16xlarge	64	512	$4.768
r5b.24xlarge	96	768	$7.152
r5b.metal	96	768	$7.152

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