db.r8g.8xlargevsdb.r8i.8xlarge

db.r8g.8xlarge is 9% cheaper than db.r8i.8xlarge on demand in US East (N. Virginia), saving $274.48 a month.

At a glancedb.r8g.8xlargedb.r8i.8xlarge
On-demand$3.824/hr9% less$4.20/hr
Lowest rate$1.797/hr9% less3-yr reserved, no upfront$1.974/hr3-yr reserved, no upfront
Size32 vCPUs, 256 GiB32 vCPUs, 256 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.8xlargedb.r8i.8xlargedb.r8i.8xlarge vs db.r8g.8xlarge
On-demandPay by the hour$3.824$4.20▲ 10%
1-yr reservedNo upfront33% off$2.56233% off$2.814▲ 10%
3-yr reservedNo upfront53% off$1.79753% off$1.974▲ 10%
1-yr savings planHourly commitment20% off$3.05920% off$3.36▲ 10%

Key differences

The biggest lead each one has.

Where db.r8g.8xlarge leads
On-demand price$3.824 vs $4.20 per hour
9% cheaper
Physical cores32 vs 16
2× higher
Where db.r8i.8xlarge leads
Sustained clock3.9 GHz vs 2.8 GHz
39% higher

Specs

13 of 24 specs differ. Those are in bold.

Compute6 of 8 differdb.r8g.8xlargedb.r8i.8xlarge
vCPUs3232
Physical cores3216
Threads per core12
Architecturearm64–
ProcessorAWS Graviton4–
CPU makerAWSIntel
Sustained clock2.8 GHz3.9 GHz
BurstableNoNo
MemoryAll 1 matchdb.r8g.8xlargedb.r8i.8xlarge
Memory (GiB)256256
Networking1 of 3 differdb.r8g.8xlargedb.r8i.8xlarge
Network15 Gigabit–
Network baseline15 Gbps15 Gbps
Network peak15 Gbps15 Gbps
Storage1 of 7 differdb.r8g.8xlargedb.r8i.8xlarge
StorageAurora IO Optimization Mode–
EBS baseline bandwidth10,000 Mbps10,000 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput1,250 MB/s1,250 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS40,00040,000
EBS max IOPS40,00040,000
Instance details4 of 4 differdb.r8g.8xlargedb.r8i.8xlarge
Familyr8gr8i
CategoryMemory optimized–
Current generationYes–
Normalization factor83.2–
Other1 of 1 differdb.r8g.8xlargedb.r8i.8xlarge
Hardware Basisr8g.8xlarger8i.8xlarge

On-demand prices by region

Cheapest for db.r8g.8xlarge first. PostgreSQL, USD per hour.

Regiondb.r8g.8xlargedb.r8i.8xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$3.824$4.20▲ 10%
US East (Ohio)us-east-2$3.824$4.20▲ 10%
US West (Oregon)us-west-2$3.824$4.20▲ 10%
Asia Pacific (Malaysia)ap-southeast-5$3.904$4.28▲ 10%
EU (Stockholm)eu-north-1$3.92$4.318▲ 10%
Canada (Central)ca-central-1$4.131$4.54▲ 10%
EU (Ireland)eu-west-1$4.288$4.70▲ 10%
Europe (Spain)eu-south-2$4.288$4.70▲ 10%
US West (N. California)us-west-1$4.288$4.70▲ 10%
Asia Pacific (Hyderabad)ap-south-2$4.352$4.79▲ 10%
Asia Pacific (Mumbai)ap-south-1$4.352$4.79▲ 10%
EU (Paris)eu-west-3$4.487$4.94▲ 10%
EU (London)eu-west-2$4.488$4.94▲ 10%
Asia Pacific (Seoul)ap-northeast-2$4.59$5.04▲ 10%
Asia Pacific (Singapore)ap-southeast-1$4.592$5.04▲ 10%
Asia Pacific (Sydney)ap-southeast-2$4.592$5.04▲ 10%
Asia Pacific (Tokyo)ap-northeast-1$4.592$5.04▲ 10%
EU (Frankfurt)eu-central-1$4.656$5.12▲ 10%
Europe (Zurich)eu-central-2$5.12$5.468▲ 7%
South America (Sao Paulo)sa-east-1$6.08$6.614▲ 9%

Keep exploring

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

db.r8g.8xlargeMemory optimized, r8g family
db.r8g.8xlarge prices and specsEvery size in the r8g family

Compare db.r8g.8xlarge with

db.m8g.8xlargedb.r8gd.8xlargedb.r8a.8xlargedb.r7g.8xlarge
db.r8i.8xlarger8i family
db.r8i.8xlarge prices and specsEvery size in the r8i family

Compare db.r8i.8xlarge with

db.m8i.8xlargedb.r8a.8xlargedb.r7i.8xlargedb.r7i.8xlarge.tpc2.mem2xdb.r7i.8xlarge.tpc2.mem3x

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.