"The chips can be had with up to 192 custom Arm cores on the open market. Unlike Amazon's Graviton or Microsoft's Cobalt, these aren't OCI exclusive. For OCI, Oracle has opted for a 96-core version of the chip clocked at 3.6 GHz with 192 MB and 64 MB of L2 and L3 cache, respectively, and 12 channels of DDR5 5600MT/s memory."
"Those cores are offered to customers in pairs of what Oracle is calling OCPUs. Each OCPU is composed of two physical cores, similar to how CPU threads on x86 CPUs from AMD or Intel are typically made available to customers. The A4 instances will be available in VMs up to 45 OCPUs (90 cores) and 700 GB of system memory or as a bare metal offering with 48 OCPUs (96 cores) and 768 GB of DDR5 and 3.84 TB of onboard storage."
"Compared to its prior-gen A2 instances, which are based on Ampere's older AmpereOne (non-M) chips, Oracle claims customers can expect up to 35 percent higher core-for-core performance, thanks in part to a 20 percent higher clock speed and the higher memory bandwidth afforded by the 12 channel controller. With that said, Oracle's A2 instances are still larger with up to 78 OCPUs (virtualized) and 946 GB of DDR5 memory. OCI A4 instances are available at $0.0138 per OCPU per hour and $0.0027 per GB per hour."
Oracle continues to use Ampere CPUs in Oracle Cloud Infrastructure by launching A4 Standard instances built on AmpereOne M silicon available as virtualized VMs and bare metal. OCI deploys a 96-core AmpereOne M at 3.6 GHz with 192 MB L2 and 64 MB L3 cache and 12-channel DDR5 5600MT/s memory. Cores are offered as OCPUs, where each OCPU equals two physical cores. VM sizes reach 45 OCPUs (90 cores) with 700 GB RAM; bare metal offers 48 OCPUs (96 cores), 768 GB DDR5 and 3.84 TB onboard storage. Oracle claims up to 35% higher core-for-core performance versus A2. A4 pricing is $0.0138 per OCPU-hour and $0.0027 per GB-hour. Future deployment of next-gen Ampere cores is unclear after Oracle sold its stake to prioritize silicon neutrality.
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