db.r8g.2xlargevsdb.r8i.2xlarge

db.r8g.2xlarge is 9% cheaper than db.r8i.2xlarge on demand in US East (N. Virginia), saving $68.62 a month. Per vCPU, db.r8g.2xlarge costs 54% less. 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.2xlargedb.r8i.2xlarge
On-demand$0.956/hr9% less$1.05/hr
Lowest rate$0.4493/hr9% less3-yr reserved, no upfront$0.4935/hr3-yr reserved, no upfront
Size8 vCPUs, 64 GiB4 vCPUs, 64 GiB
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.2xlargedb.r8i.2xlargedb.r8i.2xlarge vs db.r8g.2xlarge
On-demandPay by the hour$0.956$1.05▲ 10%
1-yr reservedNo upfront33% off$0.64133% off$0.7035▲ 10%
3-yr reservedNo upfront53% off$0.449353% off$0.4935▲ 10%
1-yr savings planHourly commitment20% off$0.764820% off$0.84▲ 10%

Key differences

The biggest lead each one has.

Where db.r8g.2xlarge leads
On-demand price$0.956 vs $1.05 per hour
9% cheaper
vCPUs8 vs 4
2× higher
Where db.r8i.2xlarge leads
Sustained clock3.9 GHz vs 2.8 GHz
39% higher

Specs

14 of 24 specs differ. Those are in bold.

Compute7 of 8 differdb.r8g.2xlargedb.r8i.2xlarge
vCPUs84
Physical cores84
Threads per core12
Architecturearm64x86_64
Processor–Intel Xeon Scalable (Granite Rapids)
CPU makerAWSIntel
Sustained clock2.8 GHz3.9 GHz
BurstableNoNo
MemoryAll 1 matchdb.r8g.2xlargedb.r8i.2xlarge
Memory (GiB)6464
Networking1 of 3 differdb.r8g.2xlargedb.r8i.2xlarge
Network–Up to 15000 Megabit
Network baseline3.75 Gbps3.75 Gbps
Network peak15 Gbps15 Gbps
Storage1 of 7 differdb.r8g.2xlargedb.r8i.2xlarge
Storage–EBS Only
EBS baseline bandwidth2,500 Mbps2,500 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput312.5 MB/s312.5 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS12,00012,000
EBS max IOPS40,00040,000
Instance details4 of 4 differdb.r8g.2xlargedb.r8i.2xlarge
Familyr8gr8i
Category–Memory optimized
Current generation–Yes
Normalization factor16–
Other1 of 1 differdb.r8g.2xlargedb.r8i.2xlarge
Hardware Basisr8g.2xlarger8i.2xlarge

On-demand prices by region

Cheapest for db.r8g.2xlarge first. PostgreSQL, USD per hour.

Regiondb.r8g.2xlargedb.r8i.2xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$0.956$1.05▲ 10%
US East (Ohio)us-east-2$0.956$1.05▲ 10%
US West (Oregon)us-west-2$0.956$1.05▲ 10%
Asia Pacific (Malaysia)ap-southeast-5$0.976$1.07▲ 10%
EU (Stockholm)eu-north-1$0.98$1.079▲ 10%
Canada (Central)ca-central-1$1.033$1.13▲ 9%
EU (Ireland)eu-west-1$1.072$1.18▲ 10%
Europe (Spain)eu-south-2$1.072$1.18▲ 10%
US West (N. California)us-west-1$1.072$1.18▲ 10%
Asia Pacific (Hyderabad)ap-south-2$1.088$1.20▲ 10%
Asia Pacific (Mumbai)ap-south-1$1.088$1.20▲ 10%
EU (London)eu-west-2$1.122$1.23▲ 10%
EU (Paris)eu-west-3$1.122$1.23▲ 10%
Asia Pacific (Seoul)ap-northeast-2$1.148$1.26▲ 10%
Asia Pacific (Singapore)ap-southeast-1$1.148$1.26▲ 10%
Asia Pacific (Sydney)ap-southeast-2$1.148$1.26▲ 10%
Asia Pacific (Tokyo)ap-northeast-1$1.148$1.26▲ 10%
EU (Frankfurt)eu-central-1$1.164$1.28▲ 10%
Europe (Zurich)eu-central-2$1.28$1.367▲ 7%
South America (Sao Paulo)sa-east-1$1.52$1.654▲ 9%

Keep exploring

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

db.r8g.2xlarger8g family
db.r8g.2xlarge prices and specsEvery size in the r8g family

Compare db.r8g.2xlarge with

db.m8g.2xlargedb.r8gd.2xlargedb.r8a.2xlargedb.r7g.2xlarge
db.r8i.2xlargeMemory optimized, r8i family
db.r8i.2xlarge prices and specsEvery size in the r8i family

Compare db.r8i.2xlarge with

db.m8i.2xlargedb.r8a.2xlargedb.r7i.2xlargedb.r7i.2xlarge.tpc2.mem4xdb.r7i.2xlarge.tpc2.mem8x

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.