Intel Xeon Platinum 8270 socket: LGA 3647
The Intel Xeon Platinum 8270 uses the LGA 3647 socket on C620 series server boards. It is a 26 core Cascade Lake-SP chip at 205 W for dense virtualization racks.
- Socket
- LGA 3647
- Launched
- April 2, 2019
- Cores and threads
- 26 and 52
- Base power
- 205 W
- Codename
- Cascade Lake-SP
- Segment
- Server
- Family
- Intel Xeon Platinum
- Clocks
- 2.7 / 4.0 GHz
Intel Xeon Platinum 8270 specifications
| Cores | 26 |
|---|---|
| Threads | 52 |
| Core architecture | Cascade Lake-SP |
| Clocks | 2.7 GHz base, up to 4.0 GHz boost |
| Cache | 35.75 MB L3 (shared) |
| Processor base power (TDP) | 205 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 8270 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 8270 is
The Xeon Platinum 8270 is a twenty six core, fifty two thread server processor with a 2.7 GHz base and up to 4.0 GHz boost. It carries 35.75 MB of shared L3 cache and a 205 W TDP on the 14 nm process. Intel launched it on April 2, 2019 near the top of the 2nd Gen Xeon Scalable stack.
Twenty six cores cover dense virtualization hosts that split hosts into dozens of tenants. The 4.0 GHz boost tops the high core bins for bursty management tasks beside sustained tenants. The multiplier is locked.
There is no integrated graphics. ECC memory and Optane persistent memory are supported up to 1 TB. Launch lists place it near $7405, with no current ARK figure, so pricing is omitted here.
Socket and motherboard compatibility
The 8270 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. Only boards validated for 205 W parts suit this bin.
C620 series boards carry six channel DDR4 and 48 PCIe 3.0 lanes per CPU for NVMe, network and accelerators. Rack chassis need strong front to back airflow with vendor qualified heatsinks. Check the board support list for 205 W validation before ordering.
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. Dense hosts reward capacity first, so 12 DIMMs of 64 GB with room for Optane suits virtualization. Validated kits are mandatory at these densities.
PCI Express arrives as version 3.0 with 48 lanes from the CPU. Three UPI links at 10.4 GT/s connect sockets in multi node racks. Cooling uses vendor 205 W server heatsinks with directed chassis airflow.
Upgrade paths
On the same socket the choice is a 24 core part such as the Xeon Platinum 8268 where base clocks matter, keeping board and DDR4. The 8270 keeps its place where two more cores cover denser tenants.
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 8270 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 8270 have?
Twenty six cores with Hyper-Threading give fifty two threads at 2.7 GHz base with up to 4.0 GHz boost, at 205 W.
What memory does the 8270 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 8270 have?
48 PCIe 3.0 lanes from the CPU plus 3 UPI links at 10.4 GT/s for multi socket racks.
How does the 8270 differ from the 8268?
The Xeon Platinum 8268 runs 24 cores at higher base clocks on the same boards. The 8270 adds two cores for denser tenants.
Sources and verification
Facts last checked against these sources on . Page last edited on .