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Feb 17, 2014

Intel “Ivy Town” 15-Core Xeon E7 Processors Detailed





There was a time when computers had only 5 MB of random access memory, but these days, the cache of the CPU is a lot larger than that, and RAM can reach even 64 GB on some motherboards, and much more on servers.

The “Ivy Town” Intel CPU series is one of the chips that makes such high performance and capacity levels possible. Or perhaps we should say that the Ivy Town will be one of the processors, since it hasn't been launched yet, though that should happen soon. Called Xeon E7-8800v2, it is made for business servers and other enterprise applications, particularly high-end workstations. First off, the chip is a 15-core model (64-bit Ivy-Bridge cores), which means that the system can use 30 threads, thanks to Hyper-Threading technology. The cache memory is a massive 35.7 MB (shared L3 cache), and the overpowered spec sheet continues with a high-speed serial I/O interface. We have 40 PCI Express lanes (2.5/5.0/8.0Gbps), four direct media interface (DMI) lanes (2.5/5.0Gbps), and 60 QPI lanes (6.4/7.2/8.0Gbps) for connecting with other CPUs in a server/ data center. The DDR3 memory controllers (and there are two of them) bear mentioning as well, each featuring two memory channels with 800MT/s – 1867MT/s effective frequencies (normal DDR3 modules) or 2667MT/s speeds (to connect to a memory extension buffer using voltage-mode single-ended / VMSE interface).

Furthermore, the Intel Xeon E7-8800v2 Ivy Town CPU boasts multiple system topologies and frequencies of 1.4 to 3.8GHz, with TDP going from 40W to 150W. As for the floorplan, it's like this: 15 cores in 3 columns (but easily reconfigured for lower core counts), with the L3 cache alongside the cores, as seen in the diagram on the left. The Intel Ivy Town LGA 2011 Xeon E7-8800v2 CPU should be released at some point this year. That's really vague, but it's all Intel said, or implied anyway.

Intel Ivy Town die

Intel Ivy Town diagram
Images credits to X-Bit Labs

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