db.r8g.4xlargevsdb.r8gd.4xlarge

db.r8g.4xlarge is 12% cheaper than db.r8gd.4xlarge on demand in US East (N. Virginia), saving $198.56 a month.

At a glancedb.r8g.4xlargedb.r8gd.4xlarge
On-demand$1.912/hr12% less$2.184/hr
Lowest rate$1.53/hr12% less1-yr savings plan, hourly commitment$1.747/hr1-yr savings plan, hourly commitment
Size16 vCPUs, 128 GiB16 vCPUs, 128 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.4xlargedb.r8gd.4xlargedb.r8gd.4xlarge vs db.r8g.4xlarge
On-demandPay by the hour$1.912$2.184▲ 14%
1-yr reservedNo upfront33% off$1.281——
3-yr reservedNo upfront53% off$0.8986——
1-yr savings planHourly commitment20% off$1.5320% off$1.747▲ 14%

Key differences

The biggest lead each one has.

Where db.r8g.4xlarge leads
On-demand price$1.912 vs $2.184 per hour
12% cheaper
Where db.r8gd.4xlarge leads

No clear lead on the measures we compare.

Specs

6 of 25 specs differ. Those are in bold.

Compute1 of 8 differdb.r8g.4xlargedb.r8gd.4xlarge
vCPUs1616
Physical cores1616
Threads per core11
Architecturearm64arm64
ProcessorAWS Graviton4–
CPU makerAWSAWS
Sustained clock2.8 GHz2.8 GHz
BurstableNoNo
MemoryAll 1 matchdb.r8g.4xlargedb.r8gd.4xlarge
Memory (GiB)128128
NetworkingAll 3 matchdb.r8g.4xlargedb.r8gd.4xlarge
NetworkUp to 15 GigabitUp to 15 Gigabit
Network baseline7.5 Gbps7.5 Gbps
Network peak15 Gbps15 Gbps
Storage2 of 8 differdb.r8g.4xlargedb.r8gd.4xlarge
StorageAurora IO Optimization Mode1 x 118 NVMe SSD
Local disks–1 × 950 GB SSD
EBS baseline bandwidth5,000 Mbps5,000 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput625 MB/s625 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS20,00020,000
EBS max IOPS40,00040,000
Instance details2 of 4 differdb.r8g.4xlargedb.r8gd.4xlarge
Familyr8gr8gd
CategoryMemory optimizedMemory optimized
Current generationYesYes
Normalization factor41.632
Other1 of 1 differdb.r8g.4xlargedb.r8gd.4xlarge
Hardware Basisr8g.4xlarger8gd.4xlarge

On-demand prices by region

Cheapest for db.r8g.4xlarge first. PostgreSQL, USD per hour.

Regiondb.r8g.4xlargedb.r8gd.4xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$1.912$2.184▲ 14%
US East (Ohio)us-east-2$1.912$2.184▲ 14%
US West (Oregon)us-west-2$1.912$2.184▲ 14%
Asia Pacific (Malaysia)ap-southeast-5$1.952$2.232▲ 14%
Canada (Central)ca-central-1$2.066$2.362▲ 14%
EU (Ireland)eu-west-1$2.144$2.434▲ 14%
Europe (Spain)eu-south-2$2.144$2.561▲ 19%
US West (N. California)us-west-1$2.144$2.493▲ 16%
EU (London)eu-west-2$2.244$2.562▲ 14%
Asia Pacific (Seoul)ap-northeast-2$2.295$2.605▲ 13%
Asia Pacific (Jakarta)ap-southeast-3$2.296$2.628▲ 14%
Asia Pacific (Sydney)ap-southeast-2$2.296$2.645▲ 15%
Asia Pacific (Tokyo)ap-northeast-1$2.296$2.628▲ 14%
EU (Frankfurt)eu-central-1$2.328$2.642▲ 14%
Asia Pacific (Hong Kong)ap-east-1$2.525$2.889▲ 14%
South America (Sao Paulo)sa-east-1$3.04$3.473▲ 14%

Keep exploring

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

db.r8g.4xlargeMemory optimized, r8g family
db.r8g.4xlarge prices and specsEvery size in the r8g family

Compare db.r8g.4xlarge with

db.m8g.4xlargedb.r8i.4xlargedb.r8a.4xlargedb.r7g.4xlarge
db.r8gd.4xlargeMemory optimized, r8gd family
db.r8gd.4xlarge prices and specsEvery size in the r8gd family

Compare db.r8gd.4xlarge with

db.m8gd.4xlargedb.r6gd.4xlarge

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.