db.r5b.12xlarge

db.r5b.12xlarge is an AWS RDS size with 48 vCPUs, 384 GiB memory. In US East (N. Virginia) it costs $7.104 per hour on demand ($5,185.92 per month) for PostgreSQL, Single-AZ; a 1-year reserved instance with no upfront costs $4.115 per hour, 42% less. It is sold in 14 regions; the cheapest is EU (Stockholm) at $7.013 per hour.

Prices by region

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

Region	On-demand	1-yr reserved
EU (Stockholm) eu-north-1	$7.013	–
US East (N. Virginia) us-east-1	$7.104	$4.115
US East (Ohio) us-east-2	$7.104	$4.115
US West (Oregon) us-west-2	$7.104	$4.115
Canada (Central) ca-central-1	$7.237	–
EU (Ireland) eu-west-1	$7.415	–
EU (Milan) eu-south-1	$7.77	–
EU (London) eu-west-2	$7.77	–
Asia Pacific (Seoul) ap-northeast-2	$7.903	–
Asia Pacific (Sydney) ap-southeast-2	$8.036	–
Asia Pacific (Singapore) ap-southeast-1	$8.424	$5.732
Asia Pacific (Tokyo) ap-northeast-1	$8.568	$5.83
EU (Frankfurt) eu-central-1	$8.573	$5.658
South America (Sao Paulo) sa-east-1	$10.523	–

Reserved and Savings Plans

Prices by engine and deployment in US East (N. Virginia)

Option	On-demand /hr	1-yr reserved /hr	3-yr reserved /hr
PostgreSQL · Single-AZ	$7.104	$4.115	–
PostgreSQL · Multi-AZ	$14.208	$8.229	–
Oracle Enterprise BYOL · Single-AZ	$6.615	–	–
Oracle Enterprise BYOL BYOM · Single-AZ	$6.615	$4.168	–
Oracle Enterprise BYOL BYOM Custom · Single-AZ	$6.624	–	–
MariaDB · Single-AZ	$7.104	$4.115	–
MySQL · Single-AZ	$7.104	$4.115	–
SQL Server Developer BYOM Custom · Single-AZ	$10.032	–	–
SQL Server Enterprise BYOM Custom · Single-AZ	$10.032	–	–
Oracle Enterprise BYOL BYOM · Multi-AZ	$13.23	$8.335	–
Oracle Enterprise BYOL BYOM Custom · Multi-AZ	$13.248	–	–
MariaDB · Multi-AZ	$14.208	$8.229	–
MySQL · Multi-AZ	$14.208	$8.229	–
SQL Server Standard · Single-AZ	$19.047	$17.999	–
SQL Server Developer BYOM Custom · Multi-AZ	$20.064	–	–
SQL Server Enterprise BYOM Custom · Multi-AZ	$20.064	–	–
SQL Server Enterprise · Single-AZ	$30.92	$30.842	–
SQL Server Enterprise Custom · Single-AZ	$30.92	–	–
SQL Server Standard · Multi-AZ	$38.094	$35.999	–
SQL Server Enterprise · Multi-AZ	$45.761	$45.647	–
SQL Server Enterprise Custom · Multi-AZ	$45.761	–	–

Specs

Compute	Value
vCPUs	48
Physical cores	24
Threads per core	2
CPU maker	Intel
Sustained clock	3.1 GHz
Burstable	No

Memory	Value
Memory (GiB)	384

Networking	Value
Network baseline	12 Gbps
Network peak	12 Gbps

Storage	Value
Storage	EBS Only
EBS baseline bandwidth	30,000 Mbps
EBS max bandwidth	30,000 Mbps
EBS baseline throughput	3,750 MB/s
EBS max throughput	3,750 MB/s
EBS baseline IOPS	130,000
EBS max IOPS	130,000

Instance details	Value
Instance type	db.r5b.12xlarge
Family	r5b
Category	Memory optimized

Other	Value
Hardware Basis	r5b.12xlarge

Compare db.r5b.12xlarge

With or without local disk and networking

vs db.r5.12xlarge vs db.r5.12xlarge.tpc2.mem2x

Other r5b sizes

Size	vCPUs	Memory (GiB)	On-demand /hr
db.r5b.large	2	16	$0.296
db.r5b.large.tpc1.mem2x	2	32	$0.551
db.r5b.xlarge	4	32	$0.592
db.r5b.2xlarge	8	64	$1.184
db.r5b.2xlarge.tpc1.mem2x	8	128	$2.205
db.r5b.2xlarge.tpc2.mem4x	8	256	$4.41
db.r5b.4xlarge	16	128	$2.368
db.r5b.4xlarge.tpc2.mem2x	16	256	$4.41
db.r5b.4xlarge.tpc2.mem3x	16	384	$6.615
db.r5b.4xlarge.tpc2.mem4x	16	512	$8.821
db.r5b.6xlarge.tpc2.mem4x	24	768	$13.231
db.r5b.8xlarge	32	256	$4.736
db.r5b.12xlarge	48	384	$7.104
db.r5b.16xlarge	64	512	$9.472
db.r5b.24xlarge	96	768	$14.208
db.r5b.2xlarge.tpc2.mem8x	–	–	$8.821
db.r5b.8xlarge.tpc2.mem3x	–	–	$13.231
db.r5b.xlarge.tpc2.mem2x	–	–	$1.103
db.r5b.xlarge.tpc2.mem4x	–	–	$2.205

Prices updated 2026-11-12 from AWS public price lists. Compare all AWS RDS sizes.