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r8i-flex EC2 instance family

Intel Xeon 6975P-C at 3.9 GHz, x86_64, 2 to 64 vCPUs, 16 to 512 GiB

Prices Description Specs Performance ranking Available Regions Prices by region
Open r8i-flex in the finder →
r8i-flex prices per hour on Linux/UNIX, each type in its cheapest region
Type vCPU Memory Typical spot On-demand Cheapest region Per vCPU-hour
r8i-flex.large2 vCPU, 16 GiB 2 16 GiB $0.0136 $0.1362 ap-south-2 of 25 $0.00680
r8i-flex.xlarge4 vCPU, 32 GiB 4 32 GiB $0.0272 $0.2723 ap-south-2 of 25 $0.00680
r8i-flex.2xlarge8 vCPU, 64 GiB 8 64 GiB $0.0545 $0.5446 ap-south-2 of 25 $0.00681
r8i-flex.4xlarge16 vCPU, 128 GiB 16 128 GiB $0.1089 $1.089 ap-south-2 of 25 $0.00681
r8i-flex.8xlarge32 vCPU, 256 GiB 32 256 GiB $0.2179 $2.179 ap-south-2 of 25 $0.00681
r8i-flex.12xlarge48 vCPU, 384 GiB 48 384 GiB $0.3268 $3.268 ap-south-2 of 25 $0.00681
r8i-flex.16xlarge64 vCPU, 512 GiB 64 512 GiB $0.4357 $4.357 ap-south-2 of 25 $0.00681

Per hour on Linux/UNIX, in each type's cheapest region. Typical spot: per pricing run of the last 7 days, the cheapest zone's spot price, averaged, as the finder shows it with that region selected. On-demand: the same region's price. Per vCPU-hour: the spot price, or without spot the on-demand price, per vCPU. Every region is under Prices by region.

The R8I-FLEX instance family, generally available since August 2025, is powered by custom Intel Xeon 6 processors (3.9 GHz all-core turbo). These cost-effective, memory-optimized instances offer 2.5x greater memory throughput and a 4.6x larger L3 cache than the R7i generation. Utilizing 6th-gen AWS Nitro Cards, they provide up to double the network and EBS bandwidth with a dynamic allocation feature. R8I-FLEX is EBS-optimized, making it a great choice for in-memory databases and distributed web-scale cache stores.

Written by Gemini from web sources and not checked: the specs and prices on this page come from AWS.

Instance Types
r8i-flex.large r8i-flex.xlarge r8i-flex.2xlarge r8i-flex.4xlarge r8i-flex.8xlarge r8i-flex.12xlarge r8i-flex.16xlarge
vCPUs
2 to 64
Memory
16 to 512 GiB
Architecture
x86_64
Processor
Intel Xeon 6975P-C
Sustained clock
3.9 GHz
Single-thread PassMark
3246 measured on r8i-flex, 2026-09-30: the median of its types in runs-on.com benchmarks
Specs of each type
Type vCPU Memory Local storage Network EBS
r8i-flex.large 2 16 GiB EBS only up to 12.5 (0.468 baseline) up to 10 (0.315 baseline)
r8i-flex.xlarge 4 32 GiB EBS only up to 12.5 (0.937 baseline) up to 10 (0.63 baseline)
r8i-flex.2xlarge 8 64 GiB EBS only up to 15 (1.875 baseline) up to 10 (1.25 baseline)
r8i-flex.4xlarge 16 128 GiB EBS only up to 15 (3.75 baseline) up to 10 (2.5 baseline)
r8i-flex.8xlarge 32 256 GiB EBS only up to 15 (7.5 baseline) up to 10 (5 baseline)
r8i-flex.12xlarge 48 384 GiB EBS only up to 22.5 (11.25 baseline) up to 15 (7.5 baseline)
r8i-flex.16xlarge 64 512 GiB EBS only up to 30 (15 baseline) up to 20 (10 baseline)

Network and EBS: peak bandwidth in Gbit/s, with the bandwidth the type sustains when it is lower. Local storage: the instance store, in decimal GB as AWS sizes it.

Ranked by PassMark single-thread score
All x86_64 arm64
#1
m8azn, x8aedz
4257
#3
m8a, c8a, hpc8a, r8a
3803 3801–3803
#7
m8i, m8ib, m8id, m8in, m8idb, m8idn, m8ine, m8i-flex, c8i, c8i-flex, c8ib, c8id, c8in, c8ine, r8i, r8i-flex, r8ib, r8id, r8idb, r8idn, r8in, t8i, x8i
3271 3243–3271
#30
i7i, r7iz
3115 3105–3115
#32
m7a, c7a, c7i, hpc7a, r7a
2955 2875–2955
#37
m7i, r7i
2816 2763–2816
#39
c7i-flex
2700
#40
m6a, m5zn, m7i-flex, c6a, hpc6a, i7ie, r6a, x2iezn
2596 2549–2596
#48
m6i, m6id, m6in, m6idn, c6i, c6id, c6in, hpc6id, i4i, r6i, r6id, r6idn, r6in, x2idn, x2iedn, z1d
2303 2269–2303
#64
c5a, c5ad, c5d
2034 1995–2034
#67
m5d, c5, c5n
1901 1853–1901
#70
m5dn, c4, r5dn, r5n, t2, t3
1777 1746–1777
#76
m5, m5n, i3en, r5, r5b, r5d
1703 1686–1703
#82
m4, c3, i3
1625 1582–1625
#85
r3, r4
1539 1525–1539
#87
m5a, m5ad, r5a, r5ad, t3a
1414 1388–1414

Not benchmarked yet 44

These families have no PassMark single-thread score yet, so they are not ranked.

c1, d2, d3, d3en, dl2q, f2, g4dn, g5, g6, g6e, g6f, g7, g7e, gr6, gr6f, h1, i2, inf1, inf2, m1, m2, m3, mac1, p3dn, p4d, p4de, p5, p5en, p6-b200, p6-b300, t1, trn1, trn1n, u-3tb1, u-6tb1, u7i-12tb, u7i-6tb, u7i-8tb, u7in-16tb, u7in-24tb, u7in-32tb, vt1, x1, x1e

25 regions with a price in the last 7 days. Select up to 4 to compare them in the price history charts under Prices by region.

Atom feed for new regions

Each type's regions on Linux/UNIX, cheapest first, with the same figures as the Prices table, and its price history: the daily mean of every zone and pricing run, over the last 15 UTC days. Each price column is tinted from its cheapest region (green) to its most expensive (red).

r8i-flex.large2 vCPU, 16 GiB, 25 regions
r8i-flex.large prices per hour on Linux/UNIX, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $0.0136 $0.1362 90%
ap-northeast-2 Seoul $0.0159 $0.1592 90%
us-east-2 Ohio $0.0232 $0.1320 82%
eu-north-1 Stockholm $0.0234 $0.1403 83%
eu-south-2 Spain $0.0235 $0.1477 84%
ap-south-1 Mumbai $0.0277 $0.1362 80%
eu-south-1 Milan $0.0308 $0.1550 80%
sa-east-1 São Paulo $0.0343 $0.2105 84%
ca-west-1 Calgary $0.0343 $0.1445 76%
af-south-1 Cape Town $0.0346 $0.1760 80%
ap-southeast-5 Malaysia $0.0374 $0.1353 72%
ca-central-1 Canada Central $0.0404 $0.1445 72%
us-west-2 Oregon $0.0420 $0.1320 68%
us-east-1 N. Virginia $0.0429 $0.1320 67%
us-west-1 N. California $0.0436 $0.1466 70%
eu-west-2 London $0.0461 $0.1550 70%
ap-southeast-6 New Zealand $0.0474 $0.1661 71%
ap-southeast-2 Sydney $0.0475 $0.1582 70%
eu-west-3 Paris $0.0482 $0.1550 69%
ap-northeast-1 Tokyo $0.0485 $0.1592 70%
eu-central-2 Zurich $0.0500 $0.1751 71%
ap-southeast-1 Singapore $0.0534 $0.1592 66%
eu-central-1 Frankfurt $0.0618 $0.1592 61%
eu-west-1 Ireland $0.0627 $0.1477 58%
me-central-1 UAE no spot $0.1625
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
r8i-flex.xlarge4 vCPU, 32 GiB, 25 regions
r8i-flex.xlarge prices per hour on Linux/UNIX, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $0.0272 $0.2723 90%
eu-south-2 Spain $0.0310 $0.2954 90%
ap-northeast-2 Seoul $0.0339 $0.3184 89%
eu-north-1 Stockholm $0.0416 $0.2807 85%
us-east-2 Ohio $0.0555 $0.2639 79%
eu-south-1 Milan $0.0597 $0.3100 81%
ap-south-1 Mumbai $0.0622 $0.2723 77%
sa-east-1 São Paulo $0.0664 $0.4210 84%
ca-west-1 Calgary $0.0693 $0.2891 76%
eu-central-2 Zurich $0.0717 $0.3502 80%
ap-southeast-5 Malaysia $0.0747 $0.2706 72%
us-west-2 Oregon $0.0781 $0.2639 70%
us-west-1 N. California $0.0804 $0.2933 73%
ca-central-1 Canada Central $0.0812 $0.2891 72%
af-south-1 Cape Town $0.0837 $0.3519 76%
ap-southeast-6 New Zealand $0.0939 $0.3321 72%
eu-west-2 London $0.0958 $0.3100 69%
eu-west-3 Paris $0.1007 $0.3100 68%
us-east-1 N. Virginia $0.1008 $0.2639 62%
ap-northeast-1 Tokyo $0.1069 $0.3184 66%
ap-southeast-1 Singapore $0.1081 $0.3184 66%
ap-southeast-2 Sydney $0.1097 $0.3163 65%
eu-west-1 Ireland $0.1345 $0.2954 54%
eu-central-1 Frankfurt $0.1401 $0.3184 56%
me-central-1 UAE no spot $0.3249
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
r8i-flex.2xlarge8 vCPU, 64 GiB, 25 regions
r8i-flex.2xlarge prices per hour on Linux/UNIX, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $0.0545 $0.5446 90%
eu-south-2 Spain $0.0591 $0.5907 90%
ap-northeast-2 Seoul $0.0643 $0.6368 90%
eu-north-1 Stockholm $0.0969 $0.5614 83%
ap-south-1 Mumbai $0.1241 $0.5446 77%
us-east-2 Ohio $0.1242 $0.5279 76%
sa-east-1 São Paulo $0.1267 $0.8421 85%
ca-central-1 Canada Central $0.1286 $0.5782 78%
ca-west-1 Calgary $0.1350 $0.5782 77%
eu-central-2 Zurich $0.1453 $0.7005 79%
ap-southeast-5 Malaysia $0.1506 $0.5413 72%
us-west-2 Oregon $0.1584 $0.5279 70%
us-west-1 N. California $0.1613 $0.5865 72%
eu-south-1 Milan $0.1673 $0.6200 73%
us-east-1 N. Virginia $0.1812 $0.5279 66%
ap-southeast-6 New Zealand $0.1927 $0.6642 71%
ap-southeast-2 Sydney $0.1973 $0.6326 69%
af-south-1 Cape Town $0.1986 $0.7038 72%
eu-west-2 London $0.2024 $0.6200 67%
eu-west-3 Paris $0.2047 $0.6200 67%
ap-northeast-1 Tokyo $0.2133 $0.6368 67%
ap-southeast-1 Singapore $0.2272 $0.6368 64%
eu-central-1 Frankfurt $0.2496 $0.6368 61%
eu-west-1 Ireland $0.2645 $0.5907 55%
me-central-1 UAE no spot $0.6498
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
r8i-flex.4xlarge16 vCPU, 128 GiB, 25 regions
r8i-flex.4xlarge prices per hour on Linux/UNIX, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $0.1089 $1.089 90%
eu-south-2 Spain $0.1181 $1.181 90%
eu-north-1 Stockholm $0.1198 $1.123 89%
ap-northeast-2 Seoul $0.1863 $1.274 85%
us-east-2 Ohio $0.1911 $1.056 82%
ca-central-1 Canada Central $0.2247 $1.156 81%
eu-south-1 Milan $0.2293 $1.240 82%
ap-south-1 Mumbai $0.2416 $1.089 78%
sa-east-1 São Paulo $0.2420 $1.684 86%
eu-central-2 Zurich $0.2458 $1.401 82%
af-south-1 Cape Town $0.2672 $1.408 81%
us-west-1 N. California $0.2883 $1.173 75%
ca-west-1 Calgary $0.2996 $1.156 74%
ap-southeast-5 Malaysia $0.2996 $1.083 72%
us-west-2 Oregon $0.3417 $1.056 68%
eu-west-3 Paris $0.3650 $1.240 71%
us-east-1 N. Virginia $0.3729 $1.056 65%
eu-west-2 London $0.3931 $1.240 68%
ap-northeast-1 Tokyo $0.4033 $1.274 68%
ap-southeast-6 New Zealand $0.4289 $1.328 68%
ap-southeast-2 Sydney $0.4301 $1.265 66%
eu-central-1 Frankfurt $0.4672 $1.274 63%
eu-west-1 Ireland $0.4691 $1.181 60%
ap-southeast-1 Singapore $0.4877 $1.274 62%
me-central-1 UAE no spot $1.300
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
r8i-flex.8xlarge32 vCPU, 256 GiB, 25 regions
r8i-flex.8xlarge prices per hour on Linux/UNIX, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $0.2179 $2.179 90%
eu-north-1 Stockholm $0.2260 $2.246 90%
ca-west-1 Calgary $0.2313 $2.313 90%
eu-south-2 Spain $0.2435 $2.363 90%
ap-northeast-2 Seoul $0.4154 $2.547 84%
us-west-1 N. California $0.4227 $2.346 82%
us-east-2 Ohio $0.4838 $2.112 77%
eu-south-1 Milan $0.4860 $2.480 80%
eu-central-2 Zurich $0.5223 $2.802 81%
af-south-1 Cape Town $0.5598 $2.815 80%
ca-central-1 Canada Central $0.5976 $2.313 74%
ap-southeast-5 Malaysia $0.6001 $2.165 72%
eu-west-3 Paris $0.6052 $2.480 76%
ap-south-1 Mumbai $0.6296 $2.179 71%
us-west-2 Oregon $0.6892 $2.112 67%
ap-southeast-6 New Zealand $0.7444 $2.657 72%
ap-northeast-1 Tokyo $0.8124 $2.547 68%
us-east-1 N. Virginia $0.8327 $2.112 61%
eu-west-2 London $0.8435 $2.480 66%
ap-southeast-2 Sydney $0.8666 $2.531 66%
sa-east-1 São Paulo $0.8962 $3.368 73%
eu-central-1 Frankfurt $0.9477 $2.547 63%
ap-southeast-1 Singapore $0.9622 $2.547 62%
eu-west-1 Ireland $1.040 $2.363 56%
me-central-1 UAE no spot $2.599
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
r8i-flex.12xlarge48 vCPU, 384 GiB, 25 regions
r8i-flex.12xlarge prices per hour on Linux/UNIX, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $0.3268 $3.268 90%
eu-north-1 Stockholm $0.3368 $3.368 90%
ca-west-1 Calgary $0.3469 $3.469 90%
eu-south-2 Spain $0.3544 $3.544 90%
ap-northeast-2 Seoul $0.5257 $3.821 86%
af-south-1 Cape Town $0.5303 $4.223 87%
ca-central-1 Canada Central $0.5418 $3.469 84%
eu-west-3 Paris $0.5580 $3.720 85%
us-west-1 N. California $0.5699 $3.519 84%
us-east-2 Ohio $0.5863 $3.167 81%
ap-south-1 Mumbai $0.6019 $3.268 82%
sa-east-1 São Paulo $0.6078 $5.052 88%
eu-south-1 Milan $0.6134 $3.720 84%
ap-southeast-2 Sydney $0.7458 $3.796 80%
eu-central-2 Zurich $0.7771 $4.203 82%
ap-southeast-5 Malaysia $0.9348 $3.248 71%
ap-southeast-6 New Zealand $1.115 $3.985 72%
us-east-1 N. Virginia $1.122 $3.167 65%
us-west-2 Oregon $1.143 $3.167 64%
ap-northeast-1 Tokyo $1.211 $3.821 68%
eu-west-1 Ireland $1.223 $3.544 65%
ap-southeast-1 Singapore $1.459 $3.821 62%
eu-central-1 Frankfurt $1.558 $3.821 59%
eu-west-2 London $1.570 $3.720 58%
me-central-1 UAE no spot $3.899
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
r8i-flex.16xlarge64 vCPU, 512 GiB, 25 regions
r8i-flex.16xlarge prices per hour on Linux/UNIX, by region, cheapest first
Region Typical spot On-demand Spot saving
ap-south-2 Hyderabad $0.4357 $4.357 90%
eu-south-2 Spain $0.4726 $4.726 90%
eu-north-1 Stockholm $0.6477 $4.491 86%
us-east-2 Ohio $0.8355 $4.223 80%
eu-south-1 Milan $0.8608 $4.960 83%
ap-northeast-2 Seoul $0.9343 $5.094 82%
sa-east-1 São Paulo $1.098 $6.737 84%
af-south-1 Cape Town $1.104 $5.631 80%
ap-south-1 Mumbai $1.200 $4.357 72%
ap-southeast-5 Malaysia $1.249 $4.330 71%
ca-central-1 Canada Central $1.281 $4.625 72%
us-west-2 Oregon $1.357 $4.223 68%
us-east-1 N. Virginia $1.375 $4.223 67%
ap-northeast-1 Tokyo $1.451 $5.094 72%
eu-west-3 Paris $1.481 $4.960 70%
us-west-1 N. California $1.530 $4.692 67%
ap-southeast-6 New Zealand $1.706 $5.314 68%
eu-central-2 Zurich $1.727 $5.604 69%
ca-west-1 Calgary $1.746 $4.625 62%
eu-west-1 Ireland $1.817 $4.726 62%
eu-west-2 London $1.851 $4.960 63%
ap-southeast-2 Sydney $2.041 $5.061 60%
ap-southeast-1 Singapore $2.086 $5.094 59%
eu-central-1 Frankfurt $2.130 $5.094 58%
me-central-1 UAE no spot $5.198
Solid: spot, the daily mean of all zones (the typical spot above takes the cheapest zone). Dashed: on-demand. UTC days.
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