db.r8g.16xlargevsdb.r8gd.16xlarge

db.r8g.16xlarge is 12% cheaper than db.r8gd.16xlarge on demand in US East (N. Virginia), saving $794.24 a month.

At a glancedb.r8g.16xlargedb.r8gd.16xlarge
On-demand$7.648/hr12% less$8.736/hr
Lowest rate$6.118/hr12% less1-yr savings plan, hourly commitment$6.989/hr1-yr savings plan, hourly commitment
Size64 vCPUs, 512 GiB64 vCPUs, 512 GiB
Architecturearm64arm64

Prices in US East (N. Virginia)

“Off” is the discount against each type’s own on-demand price. PostgreSQL, USD per hour.

Optiondb.r8g.16xlargedb.r8gd.16xlargedb.r8gd.16xlarge vs db.r8g.16xlarge
On-demandPay by the hour$7.648$8.736▲ 14%
1-yr reservedNo upfront33% off$5.124——
3-yr reservedNo upfront53% off$3.595——
1-yr savings planHourly commitment20% off$6.11820% off$6.989▲ 14%

Key differences

The biggest lead each one has.

Where db.r8g.16xlarge leads
On-demand price$7.648 vs $8.736 per hour
12% cheaper
Where db.r8gd.16xlarge leads

No clear lead on the measures we compare.

Specs

7 of 25 specs differ. Those are in bold.

Compute1 of 8 differdb.r8g.16xlargedb.r8gd.16xlarge
vCPUs6464
Physical cores6464
Threads per core11
Architecturearm64arm64
ProcessorAWS Graviton4–
CPU makerAWSAWS
Sustained clock2.8 GHz2.8 GHz
BurstableNoNo
MemoryAll 1 matchdb.r8g.16xlargedb.r8gd.16xlarge
Memory (GiB)512512
Networking1 of 3 differdb.r8g.16xlargedb.r8gd.16xlarge
Network30 Gigabit30
Network baseline30 Gbps30 Gbps
Network peak30 Gbps30 Gbps
Storage2 of 8 differdb.r8g.16xlargedb.r8gd.16xlarge
StorageEBS Only2 x 1900 NVMe SSD
Local disks–2 × 1,900 GB SSD
EBS baseline bandwidth20,000 Mbps20,000 Mbps
EBS max bandwidth20,000 Mbps20,000 Mbps
EBS baseline throughput2,500 MB/s2,500 MB/s
EBS max throughput2,500 MB/s2,500 MB/s
EBS baseline IOPS80,00080,000
EBS max IOPS80,00080,000
Instance details2 of 4 differdb.r8g.16xlargedb.r8gd.16xlarge
Familyr8gr8gd
CategoryMemory optimizedMemory optimized
Current generationYesYes
Normalization factor128384
Other1 of 1 differdb.r8g.16xlargedb.r8gd.16xlarge
Hardware Basisr8g.16xlarger8gd.16xlarge

On-demand prices by region

Cheapest for db.r8g.16xlarge first. PostgreSQL, USD per hour.

Regiondb.r8g.16xlargedb.r8gd.16xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$7.648$8.736▲ 14%
US East (Ohio)us-east-2$7.648$8.736▲ 14%
US West (Oregon)us-west-2$7.648$8.736▲ 14%
Asia Pacific (Malaysia)ap-southeast-5$7.808$8.928▲ 14%
Canada (Central)ca-central-1$8.262$9.446▲ 14%
EU (Ireland)eu-west-1$8.576$9.734▲ 14%
Europe (Spain)eu-south-2$8.576$10.243▲ 19%
US West (N. California)us-west-1$8.576$9.971▲ 16%
EU (London)eu-west-2$8.976$10.25▲ 14%
Asia Pacific (Seoul)ap-northeast-2$9.181$10.419▲ 13%
Asia Pacific (Jakarta)ap-southeast-3$9.184$10.512▲ 14%
Asia Pacific (Sydney)ap-southeast-2$9.184$10.579▲ 15%
Asia Pacific (Tokyo)ap-northeast-1$9.184$10.512▲ 14%
EU (Frankfurt)eu-central-1$9.312$10.57▲ 14%
Asia Pacific (Hong Kong)ap-east-1$10.099$11.553▲ 14%
South America (Sao Paulo)sa-east-1$12.16$13.89▲ 14%

Keep exploring

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

db.r8g.16xlargeMemory optimized, r8g family
db.r8g.16xlarge prices and specsEvery size in the r8g family

Compare db.r8g.16xlarge with

db.m8g.16xlargedb.r8i.16xlargedb.r8a.16xlargedb.r7g.16xlarge
db.r8gd.16xlargeMemory optimized, r8gd family
db.r8gd.16xlarge prices and specsEvery size in the r8gd family

Compare db.r8gd.16xlarge with

db.m8gd.16xlargedb.r6gd.16xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 20–53% below on-demand. Connect your cloud accounts to unlock greater savings with commitment protection.

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