db.r8g.largevsdb.r8i.large

db.r8g.large is 8% cheaper than db.r8i.large on demand in US East (N. Virginia), saving $15.33 a month. They use different processor architectures (arm64 and x86_64), so software built for one may need rebuilding to run on the other.

At a glancedb.r8g.largedb.r8i.large
On-demand$0.239/hr8% less$0.26/hr
Lowest rate$0.1123/hr8% less3-yr reserved, no upfront$0.1222/hr3-yr reserved, no upfront
Size2 vCPUs, 16 GiB2 vCPUs, 16 GiB
ProcessorAWS Graviton4Intel Xeon Scalable (Granite Rapids)
Architecturearm64x86_64

Prices in US East (N. Virginia)

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

Optiondb.r8g.largedb.r8i.largedb.r8i.large vs db.r8g.large
On-demandPay by the hour$0.239$0.26▲ 9%
1-yr reservedNo upfront33% off$0.1633% off$0.1742▲ 9%
3-yr reservedNo upfront53% off$0.112353% off$0.1222▲ 9%
1-yr savings planHourly commitment20% off$0.191220% off$0.208▲ 9%

Key differences

The biggest lead each one has.

Where db.r8g.large leads
On-demand price$0.239 vs $0.26 per hour
8% cheaper
Physical cores2 vs 1
2× higher
Where db.r8i.large leads
Sustained clock3.9 GHz vs 2.8 GHz
39% higher
EBS baseline bandwidth650 Mbps vs 630 Mbps
3% higher

Specs

13 of 24 specs differ. Those are in bold.

Compute6 of 8 differdb.r8g.largedb.r8i.large
vCPUs22
Physical cores21
Threads per core12
Architecturearm64x86_64
ProcessorAWS Graviton4Intel Xeon Scalable (Granite Rapids)
CPU makerAWSIntel
Sustained clock2.8 GHz3.9 GHz
BurstableNoNo
MemoryAll 1 matchdb.r8g.largedb.r8i.large
Memory (GiB)1616
Networking1 of 3 differdb.r8g.largedb.r8i.large
NetworkUp to 12.5 GigabitUp to 12500 Megabit
Network baseline0.937 Gbps0.937 Gbps
Network peak12.5 Gbps12.5 Gbps
Storage3 of 7 differdb.r8g.largedb.r8i.large
StorageAurora IO Optimization ModeEBS Only
EBS baseline bandwidth630 Mbps650 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput78.75 MB/s81.25 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS3,6003,600
EBS max IOPS40,00040,000
Instance details2 of 4 differdb.r8g.largedb.r8i.large
Familyr8gr8i
CategoryMemory optimizedMemory optimized
Current generationYesYes
Normalization factor5.2–
Other1 of 1 differdb.r8g.largedb.r8i.large
Hardware Basisr8g.larger8i.large

On-demand prices by region

Cheapest for db.r8g.large first. PostgreSQL, USD per hour.

Regiondb.r8g.largedb.r8i.largeDifference
US East (N. Virginia)Used in summaryus-east-1$0.239$0.26▲ 9%
US East (Ohio)us-east-2$0.239$0.26▲ 9%
US West (Oregon)us-west-2$0.239$0.26▲ 9%
Asia Pacific (Malaysia)ap-southeast-5$0.244$0.27▲ 11%
EU (Stockholm)eu-north-1$0.245$0.2699▲ 10%
Canada (Central)ca-central-1$0.258$0.28▲ 9%
EU (Ireland)eu-west-1$0.268$0.29▲ 8%
Europe (Spain)eu-south-2$0.268$0.29▲ 8%
US West (N. California)us-west-1$0.268$0.29▲ 8%
Asia Pacific (Hyderabad)ap-south-2$0.272$0.3▲ 10%
Asia Pacific (Mumbai)ap-south-1$0.272$0.3▲ 10%
EU (Paris)eu-west-3$0.28$0.31▲ 11%
EU (London)eu-west-2$0.281$0.31▲ 10%
Asia Pacific (Seoul)ap-northeast-2$0.287$0.32▲ 11%
Asia Pacific (Singapore)ap-southeast-1$0.287$0.32▲ 11%
Asia Pacific (Sydney)ap-southeast-2$0.287$0.32▲ 11%
Asia Pacific (Tokyo)ap-northeast-1$0.287$0.32▲ 11%
EU (Frankfurt)eu-central-1$0.291$0.32▲ 10%
Europe (Zurich)eu-central-2$0.32$0.3418▲ 7%
South America (Sao Paulo)sa-east-1$0.38$0.4134▲ 9%

Keep exploring

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

db.r8g.largeMemory optimized, r8g family
db.r8g.large prices and specsEvery size in the r8g family

Compare db.r8g.large with

db.m8g.largedb.r8gd.largedb.r8a.largedb.r7g.large
db.r8i.largeMemory optimized, r8i family
db.r8i.large prices and specsEvery size in the r8i family

Compare db.r8i.large with

db.m8i.largedb.r8a.largedb.r7i.large

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.