Intel Xeon Platinum 8280 socket: LGA 3647
The Intel Xeon Platinum 8280 uses the LGA 3647 socket on C620 series server boards. It is the high clock 28 core flagship of the standard memory tier at 205 W.
- Socket
- LGA 3647
- Launched
- April 2, 2019
- Cores and threads
- 28 and 56
- Base power
- 205 W
- Codename
- Cascade Lake-SP
- Segment
- Server
- Family
- Intel Xeon Platinum
- Clocks
- 2.7 / 4.0 GHz
Intel Xeon Platinum 8280 specifications
| Cores | 28 |
|---|---|
| Threads | 56 |
| Core architecture | Cascade Lake-SP |
| Clocks | 2.7 GHz base, up to 4.0 GHz boost |
| Cache | 38.5 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) |
| Launch price | $10,009 (launch list) |
Motherboard and chipset compatibility
Intel Xeon Platinum 8280 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 8280 is
The Xeon Platinum 8280 is a twenty eight core, fifty six thread server processor with a 2.7 GHz base and up to 4.0 GHz boost. It carries 38.5 MB of shared L3 cache and a 205 W TDP on the 14 nm process. Intel launched it on April 2, 2019 as the top standard memory SKU of the 2nd Gen Xeon Scalable family.
It adds 500 MHz base over the 8276 in the same core count for latency sensitive databases that still scale across threads. Only boards validated for 205 W parts suit this bin. The multiplier is locked at 27 times the base clock.
There is no integrated graphics. ECC memory and Optane persistent memory are supported up to 1 TB. Launch lists agree near $10,009 with no current ARK figure.
Socket and motherboard compatibility
The 8280 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. Power stages and airflow decide sustained clocks at 205 W, so the vendor 205 W validation matters.
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 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. The M sibling takes the same board to 2 TB.
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 M sibling matches this chip with 2 TB memory support, keeping board and DDR4. The 8280 keeps its place where 1 TB covers the hosts at lower cost per socket.
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 8280 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 8280 have?
Twenty eight cores with Hyper-Threading give fifty six threads at 2.7 GHz base with up to 4.0 GHz boost, at 205 W.
What memory does the 8280 support?
DDR4-2933 in six channels up to 1 TB, with ECC and Optane persistent memory support. The 8280M sibling takes 2 TB.
What boards suit the 205 W 8280?
Only boards validated for 205 W parts with strong power stages and airflow. Check the vendor list before ordering.
How does the 8280 differ from the 8280M?
The 8280M matches clocks and cache with 2 TB memory support. Only memory ceiling separates them.
Sources and verification
- Intel Xeon Platinum 8280 specifications (Intel)
- Intel Xeon Platinum 8280 specs (TechPowerUp CPU database)
Facts last checked against these sources on . Page last edited on .