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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 Windows, 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 $0.1006 $0.2194 us-east-1 of 25 $0.0503
r8i-flex.xlarge4 vCPU, 32 GiB 4 32 GiB $0.2012 $0.4387 us-east-1 of 25 $0.0503
r8i-flex.2xlarge8 vCPU, 64 GiB 8 64 GiB $0.4024 $0.8775 us-east-1 of 25 $0.0503
r8i-flex.4xlarge16 vCPU, 128 GiB 16 128 GiB $0.8048 $1.755 us-east-1 of 25 $0.0503
r8i-flex.8xlarge32 vCPU, 256 GiB 32 256 GiB $1.610 $3.510 us-east-1 of 25 $0.0503
r8i-flex.12xlarge48 vCPU, 384 GiB 48 384 GiB $2.414 $5.265 us-east-1 of 25 $0.0503
r8i-flex.16xlarge64 vCPU, 512 GiB 64 512 GiB $3.219 $7.020 us-east-1 of 25 $0.0503

Per hour on Windows, 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 Windows, 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 Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
us-east-1 N. Virginia $0.1006 $0.2194 54%
us-east-2 Ohio $0.1006 $0.2194 54%
ap-south-2 Hyderabad $0.1010 $0.2236 55%
eu-north-1 Stockholm $0.1014 $0.2278 55%
eu-south-2 Spain $0.1022 $0.2351 57%
ap-northeast-2 Seoul $0.1033 $0.2466 58%
eu-west-2 London $0.1051 $0.2424 57%
us-west-2 Oregon $0.1061 $0.2194 52%
ap-south-1 Mumbai $0.1068 $0.2236 52%
eu-west-3 Paris $0.1084 $0.2424 55%
sa-east-1 São Paulo $0.1085 $0.2979 64%
ca-central-1 Canada Central $0.1093 $0.2319 53%
ap-southeast-2 Sydney $0.1107 $0.2456 55%
eu-south-1 Milan $0.1117 $0.2424 54%
eu-central-2 Zurich $0.1125 $0.2625 57%
af-south-1 Cape Town $0.1142 $0.2634 57%
ap-southeast-1 Singapore $0.1143 $0.2466 54%
ap-northeast-1 Tokyo $0.1155 $0.2466 53%
eu-central-1 Frankfurt $0.1157 $0.2466 53%
us-west-1 N. California $0.1167 $0.2340 50%
ca-west-1 Calgary $0.1199 $0.2319 48%
eu-west-1 Ireland $0.1227 $0.2351 48%
ap-southeast-5 Malaysia $0.1247 $0.2227 44%
ap-southeast-6 New Zealand $0.1338 $0.2535 47%
me-central-1 UAE no spot $0.2499
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 Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
us-east-1 N. Virginia $0.2012 $0.4387 54%
us-east-2 Ohio $0.2012 $0.4387 54%
ap-south-2 Hyderabad $0.2020 $0.4471 55%
eu-north-1 Stockholm $0.2029 $0.4555 55%
eu-south-2 Spain $0.2043 $0.4702 57%
ap-northeast-2 Seoul $0.2066 $0.4932 58%
eu-west-2 London $0.2117 $0.4848 56%
us-west-2 Oregon $0.2122 $0.4387 52%
ap-south-1 Mumbai $0.2135 $0.4471 52%
sa-east-1 São Paulo $0.2169 $0.5958 64%
eu-west-3 Paris $0.2169 $0.4848 55%
ca-central-1 Canada Central $0.2189 $0.4639 53%
ap-southeast-2 Sydney $0.2214 $0.4911 55%
eu-south-1 Milan $0.2234 $0.4848 54%
eu-central-2 Zurich $0.2246 $0.5250 57%
af-south-1 Cape Town $0.2284 $0.5267 57%
ap-southeast-1 Singapore $0.2286 $0.4932 54%
ap-northeast-1 Tokyo $0.2311 $0.4932 53%
eu-central-1 Frankfurt $0.2313 $0.4932 53%
us-west-1 N. California $0.2372 $0.4681 49%
ca-west-1 Calgary $0.2396 $0.4639 48%
eu-west-1 Ireland $0.2457 $0.4702 48%
ap-southeast-5 Malaysia $0.2494 $0.4454 44%
ap-southeast-6 New Zealand $0.2674 $0.5069 47%
me-central-1 UAE no spot $0.4997
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 Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
us-east-1 N. Virginia $0.4024 $0.8775 54%
us-east-2 Ohio $0.4024 $0.8775 54%
ap-south-2 Hyderabad $0.4041 $0.8942 55%
eu-north-1 Stockholm $0.4057 $0.9110 55%
eu-south-2 Spain $0.4087 $0.9403 57%
ap-northeast-2 Seoul $0.4133 $0.9864 58%
us-west-2 Oregon $0.4243 $0.8775 52%
ap-south-1 Mumbai $0.4271 $0.8942 52%
eu-west-2 London $0.4292 $0.9696 56%
eu-west-3 Paris $0.4338 $0.9696 55%
sa-east-1 São Paulo $0.4338 $1.192 64%
ca-central-1 Canada Central $0.4378 $0.9278 53%
ap-southeast-2 Sydney $0.4425 $0.9822 55%
eu-south-1 Milan $0.4474 $0.9696 54%
eu-central-2 Zurich $0.4483 $1.050 57%
af-south-1 Cape Town $0.4569 $1.053 57%
ap-southeast-1 Singapore $0.4572 $0.9864 54%
ap-northeast-1 Tokyo $0.4622 $0.9864 53%
eu-central-1 Frankfurt $0.4626 $0.9864 53%
us-west-1 N. California $0.4669 $0.9361 50%
eu-west-1 Ireland $0.4910 $0.9403 48%
ca-west-1 Calgary $0.4911 $0.9278 47%
ap-southeast-5 Malaysia $0.4989 $0.8909 44%
ap-southeast-6 New Zealand $0.5351 $1.014 47%
me-central-1 UAE no spot $0.9994
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 Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
us-east-1 N. Virginia $0.8048 $1.755 54%
us-east-2 Ohio $0.8048 $1.755 54%
ap-south-2 Hyderabad $0.8081 $1.788 55%
eu-north-1 Stockholm $0.8115 $1.822 55%
ca-central-1 Canada Central $0.8148 $1.856 56%
eu-south-2 Spain $0.8173 $1.881 57%
ap-northeast-2 Seoul $0.8266 $1.973 58%
eu-west-2 London $0.8400 $1.939 57%
us-west-2 Oregon $0.8485 $1.755 52%
us-west-1 N. California $0.8495 $1.872 55%
ap-south-1 Mumbai $0.8543 $1.788 52%
sa-east-1 São Paulo $0.8676 $2.383 64%
eu-west-3 Paris $0.8679 $1.939 55%
ap-southeast-2 Sydney $0.8848 $1.964 55%
eu-south-1 Milan $0.8947 $1.939 54%
af-south-1 Cape Town $0.9142 $2.107 57%
ap-southeast-1 Singapore $0.9145 $1.973 54%
eu-central-2 Zurich $0.9177 $2.100 56%
ap-northeast-1 Tokyo $0.9244 $1.973 53%
eu-central-1 Frankfurt $0.9252 $1.973 53%
ca-west-1 Calgary $0.9622 $1.856 48%
eu-west-1 Ireland $0.9813 $1.881 48%
ap-southeast-5 Malaysia $0.9977 $1.782 44%
ap-southeast-6 New Zealand $1.070 $2.028 47%
me-central-1 UAE no spot $1.999
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 Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
us-east-1 N. Virginia $1.610 $3.510 54%
us-east-2 Ohio $1.610 $3.510 54%
ap-south-2 Hyderabad $1.616 $3.577 55%
eu-north-1 Stockholm $1.623 $3.644 55%
ca-west-1 Calgary $1.630 $3.711 56%
us-west-1 N. California $1.633 $3.744 56%
eu-south-2 Spain $1.635 $3.761 57%
ap-northeast-2 Seoul $1.653 $3.946 58%
eu-central-2 Zurich $1.679 $4.200 60%
eu-west-2 London $1.680 $3.879 57%
ap-southeast-2 Sydney $1.687 $3.929 57%
us-west-2 Oregon $1.697 $3.510 52%
ap-south-1 Mumbai $1.709 $3.577 52%
sa-east-1 São Paulo $1.735 $4.767 64%
eu-west-3 Paris $1.735 $3.879 55%
ca-central-1 Canada Central $1.736 $3.711 53%
eu-south-1 Milan $1.788 $3.879 54%
af-south-1 Cape Town $1.826 $4.214 57%
ap-southeast-1 Singapore $1.829 $3.946 54%
ap-northeast-1 Tokyo $1.849 $3.946 53%
eu-central-1 Frankfurt $1.851 $3.946 53%
eu-west-1 Ireland $1.963 $3.761 48%
ap-southeast-5 Malaysia $1.997 $3.564 44%
ap-southeast-6 New Zealand $2.139 $4.055 47%
me-central-1 UAE no spot $3.998
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 Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
us-east-1 N. Virginia $2.414 $5.265 54%
us-east-2 Ohio $2.414 $5.265 54%
us-west-2 Oregon $2.414 $5.265 54%
ap-south-2 Hyderabad $2.424 $5.365 55%
eu-north-1 Stockholm $2.434 $5.466 55%
ca-central-1 Canada Central $2.445 $5.567 56%
ca-west-1 Calgary $2.445 $5.567 56%
us-west-1 N. California $2.450 $5.617 56%
eu-south-2 Spain $2.452 $5.642 57%
eu-west-1 Ireland $2.452 $5.642 57%
eu-west-2 London $2.470 $5.818 58%
eu-west-3 Paris $2.470 $5.818 58%
ap-southeast-2 Sydney $2.477 $5.893 58%
ap-northeast-2 Seoul $2.480 $5.918 58%
ap-southeast-1 Singapore $2.480 $5.918 58%
eu-central-1 Frankfurt $2.480 $5.918 58%
ap-south-1 Mumbai $2.562 $5.365 52%
ap-northeast-1 Tokyo $2.574 $5.918 57%
eu-south-1 Milan $2.583 $5.818 56%
sa-east-1 São Paulo $2.603 $7.150 64%
af-south-1 Cape Town $2.634 $6.321 58%
eu-central-2 Zurich $2.701 $6.300 57%
ap-southeast-5 Malaysia $2.994 $5.345 44%
ap-southeast-6 New Zealand $3.205 $6.083 47%
me-central-1 UAE no spot $5.996
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 Windows, by region, cheapest first
Region Typical spot On-demand Spot saving
us-east-1 N. Virginia $3.219 $7.020 54%
us-east-2 Ohio $3.219 $7.020 54%
us-west-2 Oregon $3.219 $7.020 54%
ap-south-2 Hyderabad $3.233 $7.154 55%
eu-north-1 Stockholm $3.259 $7.288 55%
us-west-1 N. California $3.266 $7.489 56%
eu-south-2 Spain $3.269 $7.523 57%
eu-west-1 Ireland $3.269 $7.523 57%
eu-west-2 London $3.293 $7.757 58%
ap-southeast-2 Sydney $3.303 $7.858 58%
ap-northeast-2 Seoul $3.306 $7.891 58%
ap-southeast-1 Singapore $3.306 $7.891 58%
eu-central-1 Frankfurt $3.306 $7.891 58%
eu-south-1 Milan $3.319 $7.757 57%
ap-south-1 Mumbai $3.416 $7.154 52%
sa-east-1 São Paulo $3.471 $9.533 64%
eu-west-3 Paris $3.473 $7.757 55%
eu-central-2 Zurich $3.608 $8.401 57%
af-south-1 Cape Town $3.658 $8.428 57%
ca-central-1 Canada Central $3.713 $7.422 50%
ca-west-1 Calgary $3.914 $7.422 47%
ap-southeast-5 Malaysia $4.003 $7.127 44%
ap-northeast-1 Tokyo $4.231 $7.891 46%
ap-southeast-6 New Zealand $4.369 $8.111 46%
me-central-1 UAE no spot $7.995
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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