Intel Xeon Platinum 8268 socket: LGA 3647
The Intel Xeon Platinum 8268 uses the LGA 3647 socket on C620 series server boards. It is a high clock 24 core at 205 W for latency sensitive racks.
- Socket
- LGA 3647
- Launched
- April 2, 2019
- Cores and threads
- 24 and 48
- Base power
- 205 W
- Codename
- Cascade Lake-SP
- Segment
- Server
- Family
- Intel Xeon Platinum
- Clocks
- 2.9 / 3.9 GHz
Intel Xeon Platinum 8268 specifications
| Cores | 24 |
|---|---|
| Threads | 48 |
| Core architecture | Cascade Lake-SP |
| Clocks | 2.9 GHz base, up to 3.9 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 8268 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 8268 is
The Xeon Platinum 8268 is a twenty four core, forty eight thread server processor with a 2.9 GHz base and up to 3.9 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 as the high clock 24 core of the 2nd Gen Xeon Scalable family.
It adds 500 MHz base over the 8260 in the same core count for latency sensitive trading and database nodes. The 205 W rating needs stronger cooling and power delivery than the 165 W bins. 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 $6302, with no current ARK figure, so pricing is omitted here.
Socket and motherboard compatibility
The 8268 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, since power stages and airflow decide sustained clocks.
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. Low latency nodes pair fast DIMMs with validated kits at rated speed. Capacity planning follows the database size rather than core count.
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 the 165 W Xeon Platinum 8260 where power budgets matter, keeping board and DDR4. The 8268 keeps its place where base clocks beat watts for latency.
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 8268 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 8268 have?
Twenty four cores with Hyper-Threading give forty eight threads at 2.9 GHz base with up to 3.9 GHz boost, at 205 W.
How does the 8268 differ from the 8260?
It adds 500 MHz base over the 8260 in the same core count for latency sensitive nodes, with a higher 205 W TDP.
What memory does the 8268 support?
DDR4-2933 in six channels up to 1 TB, with ECC and Optane persistent memory support.
What boards suit the 205 W 8268?
Only boards validated for 205 W parts with strong power stages and airflow. Check the vendor list before ordering.
Sources and verification
- Intel Xeon Platinum 8268 specifications (Intel)
- Intel Xeon Platinum 8268 specs (TechPowerUp CPU database)
Facts last checked against these sources on . Page last edited on .