Intel Xeon Platinum 8253 socket: LGA 3647
The Intel Xeon Platinum 8253 uses the LGA 3647 socket on C620 series server boards. It is a 16 core Cascade Lake-SP chip with six channel DDR4 for rack servers.
- Socket
- LGA 3647
- Launched
- April 2, 2019
- Cores and threads
- 16 and 32
- Base power
- 125 W
- Codename
- Cascade Lake-SP
- Segment
- Server
- Family
- Intel Xeon Platinum
- Clocks
- 2.2 / 3.0 GHz
Intel Xeon Platinum 8253 specifications
| Cores | 16 |
|---|---|
| Threads | 32 |
| Core architecture | Cascade Lake-SP |
| Clocks | 2.2 GHz base, up to 3.0 GHz boost |
| Cache | 22 MB L3 (shared) |
| Processor base power (TDP) | 125 W |
| Manufacturing process | 14 nm |
| Memory support | DDR4-2933, six channels, up to 1 TB |
| PCI Express | PCIe 3.0, 48 lanes from the CPU |
| UPI links | 3 links at 10.4 GT/s |
| Integrated graphics | None |
| Multiplier | Locked |
| ECC memory | Yes |
| Package | FCLGA3647 (76.0 by 56.5 mm) |
Motherboard and chipset compatibility
Intel Xeon Platinum 8253 needs a motherboard with a LGA 3647 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| C620 series | C621 | Works out of the box |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for LGA 3647.
LGA 3647 at a glance
| Type | LGA, 3,647 contacts |
|---|---|
| Package size | 76.0 × 56.5 mm |
| Introduced | 2016 |
| Memory | DDR4-2933 ECC, six channels, up to 2 TB |
| Cooler mounting holes | Board specific (narrow and square ILM heatsinks) |
What the Xeon Platinum 8253 is
The Xeon Platinum 8253 is a sixteen core, thirty two thread server processor with a 2.2 GHz base and up to 3.0 GHz boost. It carries 22 MB of shared L3 cache and a 125 W TDP on the 14 nm process. Intel launched it on April 2, 2019 with the 2nd Gen Xeon Scalable family on the Purley refresh platform.
Sixteen cores cover virtualization hosts and database nodes where core count beats clocks. Three UPI links at 10.4 GT/s join multi socket topologies up to eight sockets. The multiplier is locked.
There is no integrated graphics, which is standard for rack server silicon. ECC memory and Optane persistent memory are supported. Launch lists place it near $3115, with no current ARK figure, so pricing is omitted here.
Socket and motherboard compatibility
The 8253 fits LGA 3647 on server boards with the C620 series chipsets. Boards need a BIOS with 2nd Gen Scalable support and the exact SKU on the vendor list. The Socket vs chipset: what decides whether a CPU works guide explains platform support by generation.
C620 series boards carry six channel DDR4 and 48 PCIe 3.0 lanes per CPU for NVMe and network cards. Rack chassis need front to back airflow with vendor qualified heatsinks on narrow or square ILM mounts. Check the board memory QVL for DIMM and Optane combinations.
The chip ships tray only with no cooler. The Intel Xeon W-3175X shares the socket on workstation boards, while server racks use Scalable parts like this one.
Memory, PCIe and cooling
Memory support is DDR4-2933 in six channels up to 1 TB, with ECC and Optane persistent memory. Six DIMMs per socket hold rated speed most easily, while full population needs validated kits. Capacity planning matters more than raw speed for virtualization hosts.
PCI Express arrives as version 3.0 with 48 lanes from the CPU for NICs, NVMe and accelerators. Three UPI links connect sockets in multi node racks. Cooling uses vendor 125 W server heatsinks with directed chassis airflow.
Upgrade paths
On the same socket the step up is a higher core part such as the Xeon Platinum 8260 where thread density matters, keeping board and DDR4. The 8253 keeps its place where sixteen cores cover the rack at lower power and cost.
Moving past LGA 3647 means a new board on a current server platform. Rack owners usually add memory or network cards before replacing processors.
Frequently asked questions
What socket does the Xeon Platinum 8253 use?
It uses LGA 3647 on C620 series server boards with a BIOS that lists 2nd Gen Xeon Scalable parts.
How many cores does the 8253 have?
Sixteen cores with Hyper-Threading give thirty two threads at 2.2 GHz base with up to 3.0 GHz boost, with 22 MB of cache at 125 W.
What memory does the 8253 support?
DDR4-2933 in six channels up to 1 TB, with ECC and Optane persistent memory support.
How many PCIe lanes and UPI links does the 8253 have?
48 PCIe 3.0 lanes from the CPU plus 3 UPI links at 10.4 GT/s for multi socket racks.
What steps up from the 8253 on the same socket?
The Xeon Platinum 8260 adds eight cores with more cache on the same boards. The 8253 covers lighter racks at lower cost.
Sources and verification
- Intel Xeon Platinum 8253 specifications (Intel)
- Intel Xeon Platinum 8253 specs (TechPowerUp CPU database)
Facts last checked against these sources on . Page last edited on .