Intel Xeon E7-4809 v3 socket: LGA 2011-1

What the Xeon E7-4809 v3 is

The Xeon E7-4809 v3 is the entry Haswell-EX part on LGA 2011-1 for 4S mission critical servers. Intel set 8 cores and 16 threads at a fixed 2.0 GHz with no turbo. Twenty megabytes of last level cache cover database workers. Power is 115 W on 22 nm from the second quarter of 2015.

Fixed clocks favor predictable latency in large 4S systems. Three QPI links at 6.4 GT/s tie four sockets. Eight cores keep per socket licenses low while 4S scale adds threads. The lack of turbo simplifies capacity planning.

No integrated graphics exist. DDR4 and DDR3 with ECC over four channels to 1.5 TB per socket feed big memory guests. Buyers pick the 4809 v3 where 4S RAS with modest clocks beats faster fewer sockets.

Socket and motherboard compatibility

The 4809 v3 fits LGA 2011-1 on Brickland 4S boards with E7 v3 firmware. E7-4800 validates to four sockets, unlike E7-8800 to eight. The socket shares the 2011 count with LGA 2011-v3 but uses three QPI links, so parts never interchange.

DDR3 or DDR4 with ECC populates four channels per socket, never mixed. The Socket vs chipset: what decides whether a CPU works guide covers ideas, vendor docs decide mirroring and sparing maps.

Memory, PCIe and cooling

DDR4-1333 to 1866 or DDR3 with ECC over four channels to 1.5 TB per socket suits big memory databases. Address mirroring and rank sparing options protect data with capacity cost. Balance memory across all four sockets.

PCIe 3.0 with 32 lanes per socket serves HBAs and networking. Mission critical I/O favors RAS over accelerators. QPI at 6.4 GT/s links sockets in 4S builds.

Cooling uses 4S server heatsinks for 115 W continuous. No boxed cooler ships. Fixed clocks ease thermal planning in dense racks.

Upgrade paths

On the same socket the Intel Xeon E7-4820 v3 at 10 cores and 1.9 GHz nearby adds threads for similar power, while the Intel Xeon E7-4830 v3 at 12 cores with turbo lifts bursts. All share LGA 2011-1 where vendor firmware lists them.

A move to E7 v4 needs Broadwell-EX firmware. The 4809 v3 covers entry 4S big memory where fixed clocks aid planning.