Instances›AWS EC2›r7a›r7a.metal-48xl
Compute
vCPUs192
Memory1536 GiB
Mem / vCPU8.00 GiB
ProcessorEPYC 9R14 Processor
Clock speedUp to 3.7 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth40,000 Mbps
Throughput5000 MB/s
IOPS240,000
Networking
Performance50 Gigabit
Max ENIs15
IPv6Yes
GPUNone
Family sizes
r7a.medium1 vCPU · 8 GiB
r7a.large2 vCPU · 16 GiB
r7a.xlarge4 vCPU · 32 GiB
r7a.2xlarge8 vCPU · 64 GiB
r7a.4xlarge16 vCPU · 128 GiB
r7a.8xlarge32 vCPU · 256 GiB
r7a.12xlarge48 vCPU · 384 GiB
r7a.16xlarge64 vCPU · 512 GiB
r7a.24xlarge96 vCPU · 768 GiB
r7a.32xlarge128 vCPU · 1024 GiB
r7a.48xlarge192 vCPU · 1536 GiB
r7a.metal-48xl192 vCPU · 1536 GiB
r7a.metal-48xl

The r7a.metal-48xl is a memory-optimized AWS EC2 instance: 192 vCPU and 1536 GiB of memory, 8.00 GiB per vCPU. In the name, "r" stands for RAM, "7" is the generation, "a" marks AMD processors and "metal-48xl" is the size within the r7a family. It runs on AMD EPYC 9R14 Processor at Up to 3.7 GHz, and AWS introduced it in October 2023. AWS has since shipped r8a and r9g; r8a.metal-48xl is the direct replacement at this size, scoring 6,825,674 CoreMark/s against this instance's 6,200,215 — roughly 10% more throughput for the same vCPU count. No single Spot node covers 192 vCPU and 1536 GiB, so the equivalent is a fleet: 12 × mh.vs1.2xlarge, 192 vCPU and 1536 GiB in total, $14.61/hr on AWS in US East (N. Virginia), from $0.252/hr on Rackspace Spot. Spot delivers compute as managed Kubernetes, so a node pool of that size is the native shape of the answer rather than a workaround — provided the workload scales horizontally.

Match qualityVirtualised, not bare metal

r7a.metal-48xl is a full physical server — no virtualisation layer in the way, direct access to the hardware, and a socket count that licensing can verify.

Rackspace Spot no longer sells bare metal; everything in the catalog is a virtual machine. You get the same cores and memory (12 × mh.vs1.2xlarge, 192 vCPU, 1,536 GiB), but not the dedicated hardware. If you picked r7a.metal-48xl because you needed the real machine — nested virtualisation, per-socket licensing, low-level profiling — this is not a replacement at any price. If you picked it because it is the biggest r7a, it is the same compute for a lot less.

Runs as a fleetNo single Spot node has 192 vCPU; the largest comparable one has 16. So this runs as 12 nodes. That works if your workload already spreads across machines, and doesn't if one process needs all the cores together.
Pricing by region
1 hr
RegionAWS on-demandAWS Spot1-yr Reserved3-yr ReservedRackspace SpotYou save
US East, N. Virginia$14.606$2.760$9.662$6.625$0.252
$14.354 savings
US Central, Chicagono AWS region$0.252
US Central, Dallasno AWS region$1.572
Hong Kong$0.252
Sydney, Australia$0.252
London, UK$1.572
US West, San Jose$0.024
US Central, Dallas 2no AWS region$2.904
When to use it
Good for
  • ●Real-time analytics over hot datasets
  • ●Database instances that keep the working set in RAM
  • ●Graph and search workloads with large indexes
  • ●Workloads that fit inside 1536 GiB of RAM
  • ●Parallel work that can occupy 192 vCPU
  • ●Network-heavy services — AWS rates this size at 50 Gigabit
  • ●Anything that shards cleanly across 12 nodes, which is how it maps onto Rackspace Spot
Avoid if
  • ●Starting a new deployment. r8a.metal-48xl is the newer generation at this size.
  • ●The working set needs more than 1536 GiB of RAM
  • ●You need dedicated hardware. Rackspace Spot sells virtualised compute only.
  • ●CPU-bound work. You are paying for memory this workload will not use.
  • ●More than 8.00 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
  • ●The work is single-threaded. Most of these 192 vCPU would sit idle.
$10,663/mo on AWS on-demand against $184/mo on Rackspace Spot for the 12-node equivalent — market-priced, not list-priced.
  • Spot sells spare capacity at market prices. It is the cheapest compute on the internet.
  • Prices are set by supply and demand. You pay what the market decides.
  • Compute is delivered as fully managed Kubernetes. All infrastructure is taken care of.
  • Egress costs $0.01/GB after the free allowance. AWS charges $0.09/GB.
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