db.r8g.48xlargevsdb.r8i.48xlarge

db.r8g.48xlarge is 9% cheaper than db.r8i.48xlarge on demand in US East (N. Virginia), saving $1,646.88 a month.

At a glancedb.r8g.48xlargedb.r8i.48xlarge
On-demand$22.944/hr9% less$25.20/hr
Lowest rate$10.784/hr9% less3-yr reserved, no upfront$11.844/hr3-yr reserved, no upfront
Size192 vCPUs, 1536 GiB192 vCPUs, 1536 GiB

Prices in US East (N. Virginia)

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

Optiondb.r8g.48xlargedb.r8i.48xlargedb.r8i.48xlarge vs db.r8g.48xlarge
On-demandPay by the hour$22.944$25.20▲ 10%
1-yr reservedNo upfront33% off$15.37233% off$16.884▲ 10%
3-yr reservedNo upfront53% off$10.78453% off$11.844▲ 10%
1-yr savings planHourly commitment20% off$18.35520% off$20.16▲ 10%

Key differences

The biggest lead each one has.

Where db.r8g.48xlarge leads
On-demand price$22.944 vs $25.20 per hour
9% cheaper
Physical cores192 vs 96
2× higher
Where db.r8i.48xlarge leads
Network baseline75 Gbps vs 50 Gbps
50% higher
EBS baseline bandwidth60,000 Mbps vs 40,000 Mbps
50% higher
Sustained clock3.9 GHz vs 2.7 GHz
44% higher

Specs

19 of 24 specs differ. Those are in bold.

Compute6 of 8 differdb.r8g.48xlargedb.r8i.48xlarge
vCPUs192192
Physical cores19296
Threads per core12
Architecturearm64–
ProcessorAWS Graviton4–
CPU makerAWSIntel
Sustained clock2.7 GHz3.9 GHz
BurstableNoNo
MemoryAll 1 matchdb.r8g.48xlargedb.r8i.48xlarge
Memory (GiB)1,5361,536
Networking3 of 3 differdb.r8g.48xlargedb.r8i.48xlarge
Network50 Gigabit–
Network baseline50 Gbps75 Gbps
Network peak50 Gbps75 Gbps
Storage5 of 7 differdb.r8g.48xlargedb.r8i.48xlarge
StorageEBS Only–
EBS baseline bandwidth40,000 Mbps60,000 Mbps
EBS max bandwidth40,000 Mbps60,000 Mbps
EBS baseline throughput5,000 MB/s7,500 MB/s
EBS max throughput5,000 MB/s7,500 MB/s
EBS baseline IOPS240,000240,000
EBS max IOPS240,000240,000
Instance details4 of 4 differdb.r8g.48xlargedb.r8i.48xlarge
Familyr8gr8i
CategoryMemory optimized–
Current generationYes–
Normalization factor768384
Other1 of 1 differdb.r8g.48xlargedb.r8i.48xlarge
Hardware Basisr8g.48xlarger8i.48xlarge

On-demand prices by region

Cheapest for db.r8g.48xlarge first. PostgreSQL, USD per hour.

Regiondb.r8g.48xlargedb.r8i.48xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$22.944$25.20▲ 10%
US East (Ohio)us-east-2$22.944$25.20▲ 10%
US West (Oregon)us-west-2$22.944$25.20▲ 10%
Asia Pacific (Malaysia)ap-southeast-5$23.424$25.70▲ 10%
EU (Stockholm)eu-north-1$23.52$25.906▲ 10%
Canada (Central)ca-central-1$24.787$27.22▲ 10%
EU (Ireland)eu-west-1$25.728$28.22▲ 10%
Europe (Spain)eu-south-2$25.728$28.22▲ 10%
US West (N. California)us-west-1$25.728$28.22▲ 10%
Asia Pacific (Hyderabad)ap-south-2$26.112$28.73▲ 10%
Asia Pacific (Mumbai)ap-south-1$26.112$28.73▲ 10%
EU (Paris)eu-west-3$26.921$29.64▲ 10%
EU (London)eu-west-2$26.928$29.64▲ 10%
Asia Pacific (Seoul)ap-northeast-2$27.542$30.24▲ 10%
Asia Pacific (Singapore)ap-southeast-1$27.552$30.24▲ 10%
Asia Pacific (Sydney)ap-southeast-2$27.552$30.24▲ 10%
Asia Pacific (Tokyo)ap-northeast-1$27.552$30.24▲ 10%
EU (Frankfurt)eu-central-1$27.936$30.74▲ 10%
Europe (Zurich)eu-central-2$30.72$32.81▲ 7%
South America (Sao Paulo)sa-east-1$36.481$39.686▲ 9%

Keep exploring

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

db.r8g.48xlargeMemory optimized, r8g family
db.r8g.48xlarge prices and specsEvery size in the r8g family

Compare db.r8g.48xlarge with

db.m8g.48xlargedb.r8gd.48xlargedb.r8a.48xlarge
db.r8i.48xlarger8i family
db.r8i.48xlarge prices and specsEvery size in the r8i family

Compare db.r8i.48xlarge with

db.m8i.48xlargedb.r8a.48xlargedb.r7i.48xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 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.