db.r6gd.4xlargevsdb.r8gd.4xlarge

db.r6gd.4xlarge is 6% cheaper than db.r8gd.4xlarge on demand in US East (N. Virginia), saving $92.71 a month.

At a glancedb.r6gd.4xlargedb.r8gd.4xlarge
On-demand$2.057/hr6% less$2.184/hr
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.r6gd.4xlargedb.r8gd.4xlargedb.r8gd.4xlarge vs db.r6gd.4xlarge
On-demandPay by the hour$2.057$2.184▲ 6%
1-yr reservedNo upfront23% off$1.584——
1-yr savings planHourly commitment—20% off$1.747—

Key differences

The biggest lead each one has.

Where db.r6gd.4xlarge leads
On-demand price$2.057 vs $2.184 per hour
6% cheaper
Where db.r8gd.4xlarge leads
EBS max bandwidth10,000 Mbps vs 4,750 Mbps
2.1× higher
Network baseline7.5 Gbps vs 5 Gbps
50% higher
Sustained clock2.8 GHz vs 2.5 GHz
12% higher

Specs

14 of 25 specs differ. Those are in bold.

Compute2 of 8 differdb.r6gd.4xlargedb.r8gd.4xlarge
vCPUs1616
Physical cores1616
Threads per core11
Architecturearm64arm64
ProcessorAWS Graviton2–
CPU makerAWSAWS
Sustained clock2.5 GHz2.8 GHz
BurstableNoNo
MemoryAll 1 matchdb.r6gd.4xlargedb.r8gd.4xlarge
Memory (GiB)128128
Networking3 of 3 differdb.r6gd.4xlargedb.r8gd.4xlarge
NetworkUp to 10 GigabitUp to 15 Gigabit
Network baseline5 Gbps7.5 Gbps
Network peak10 Gbps15 Gbps
Storage6 of 8 differdb.r6gd.4xlargedb.r8gd.4xlarge
Storage1 x 950 NVMe SSD1 x 118 NVMe SSD
Local disks1 × 950 GB SSD1 × 950 GB SSD
EBS baseline bandwidth4,750 Mbps5,000 Mbps
EBS max bandwidth4,750 Mbps10,000 Mbps
EBS baseline throughput593.75 MB/s625 MB/s
EBS max throughput593.75 MB/s1,250 MB/s
EBS baseline IOPS20,00020,000
EBS max IOPS20,00040,000
Instance details2 of 4 differdb.r6gd.4xlargedb.r8gd.4xlarge
Familyr6gdr8gd
CategoryMemory optimizedMemory optimized
Current generationYesYes
Normalization factor6432
Other1 of 1 differdb.r6gd.4xlargedb.r8gd.4xlarge
Hardware Basisr6gd.4xlarger8gd.4xlarge

On-demand prices by region

Cheapest for db.r6gd.4xlarge first. PostgreSQL, USD per hour.

Regiondb.r6gd.4xlargedb.r8gd.4xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$2.057$2.184▲ 6%
US East (Ohio)us-east-2$2.057$2.184▲ 6%
US West (Oregon)us-west-2$2.057$2.184▲ 6%
Asia Pacific (Malaysia)ap-southeast-5$2.104$2.232▲ 6%
Canada (Central)ca-central-1$2.226$2.362▲ 6%
EU (Ireland)eu-west-1$2.288$2.434▲ 6%
Europe (Spain)eu-south-2$2.288$2.561▲ 12%
US West (N. California)us-west-1$2.34$2.493▲ 7%
Asia Pacific (Jakarta)ap-southeast-3$2.469$2.628▲ 6%
Asia Pacific (Tokyo)ap-northeast-1$2.469$2.628▲ 6%
Asia Pacific (Sydney)ap-southeast-2$2.485$2.645▲ 6%
EU (Frankfurt)eu-central-1$2.488$2.642▲ 6%
EU (London)eu-west-2$2.918$2.562▼ 12%
Asia Pacific (Seoul)ap-northeast-2$3.005$2.605▼ 13%
South America (Sao Paulo)sa-east-1$5.155$3.473▼ 33%

Keep exploring

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

db.r6gd.4xlargeMemory optimized, r6gd family
db.r6gd.4xlarge prices and specsEvery size in the r6gd family

Compare db.r6gd.4xlarge with

db.r6g.4xlargedb.m6gd.4xlargedb.r6id.4xlargedb.c6gd.4xlarge
db.r8gd.4xlargeMemory optimized, r8gd family
db.r8gd.4xlarge prices and specsEvery size in the r8gd family

Compare db.r8gd.4xlarge with

db.r8g.4xlargedb.m8gd.4xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 20–23% 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.