AMD EPYC 7742 socket: SP3

What the EPYC 7742 is

The EPYC 7742 is a 64-core, 128-thread flagship server processor from Rome. It launched in August 2019 as the top of the 7002 stack with a 2.25 GHz base and up to 3.4 GHz boost at 225 W. Eight binned chiplets share 256 MB of L3.

The highest base and boost of any 64-core Rome part shorten both batch and interactive phases. Thirty two megabytes of L2 back the largest thread pools in its generation. The 225 W envelope needs the best cooling a rack offers.

Dual socket scaling reaches 256 threads per box for flagship clouds and HPC. The 7742 led launch benchmarks against competing dual socket servers with a single socket. Record seeking data centers fit here.

Socket and motherboard compatibility

The EPYC 7742 fits SP3 on single and dual socket boards rated for 225 W. Top tier power stages and firmware decide sustained clocks. Vendor qualification is strictest at the flagship band.

Flagship dual socket pairs total 128 cores with terabytes of RAM for whole rack consolidation. Redundant high wattage power follows the manual. The How to find your CPU socket type guide covers server sockets.

Milan 7763 later took the flagship role on these boards with BIOS updates.

Memory, PCIe and cooling

Eight DDR4-3200 ECC channels per socket reach up to 4 TB for flagship analytics. Dual socket builds double bandwidth and capacity. All channels filled matters most at 64 cores.

PCIe Gen4 lanes total 128 per socket and up to 160 in 2P builds for flagship fabrics and flash. One box can front a storage array. Accelerator counts follow lane budgets.

The 225 W flagship class wants premium air or liquid cooling per socket. Inlet temperatures decide boost more than cooler choice. Large package torque follows the manual exactly.

Where this Rome part fits

Sixty four flagship cores fit record clouds, HPC flagships and dense virtualization at any scale. Top clocks plus top cache remove the usual flagship compromises. The 256 MB L3 holds the largest working sets of its generation.

Operators standardize on 2P 7742 pairs where one box must do everything. Power and cooling budgets run highest here. The AMD EPYC 7702 trims watts nearby for power aware rows.

Benchmark total cost with software licenses before choosing dense flagships.

Upgrade paths

On SP3 the flagship path continues to Milan 7763 parts with IPC gains on the same boards. Memory, fabrics and flash carry over.

SP5 Genoa flagships bring DDR5 for the next record step. The CPU cooler compatibility by socket guide details flagship cooling.