Archiving and Mathematical Calculations
Due to high-speed integrated memory controller, Core i7 and Core i5 processors can archive way better than their competitors. Even the junior member of this family, Core i5-750, is far ahead of Core 2 Quad and Phenom II X4 CPUs, which are actually also equipped with an integrated memory controller.
The results of Mathematica suite are pretty predictable. Just like in many other applications, the new CPUs outperform all rivals except LGA1366 solutions, where they retain certain parity of results.
Just like in many other computational tasks, Hyper-Threading support determines the outcome in the distributed computing project called Folding@Home. Core i7-870 supporting this technology runs very close to Core i7-950. As for the performance of Core i5-750 without the Hyper-Threading support, it is at the level of top Core 2 Quad and Phenom II X4 processors.
Performance under Single-Thread Load
In conclusion to our Lynnfield performance tests we decided to see how they will perform under single-thread load, when Turbo Mode technology can overclock them to the maximum. For our experiments we decided to go with the good old SuperPi benchmark that calculated 8 million digits of the π number, and a single-thread Cinebench R10 final rendering test.
Core i7-870 and Core i5-750 processors in these somewhat artificial conditions performed outstandingly. Turbo Mode increased their clock speeds to 3.6 and 3.2 GHz respectively, which helped them to seriously outperform even the more expensive LGA1366 solutions. All other quad-core processors that should be direct competitors to Lynnfield from the price standpoint are hopelessly behind even the junior Core i5-750 CPU, not to mention the senior LGA1156 solution.
In other words, even though LGA1156 platform is currently available only with three quad-core processors, it makes sense to upgrade to it even if you are not using multi-threaded applications at all. Aggressive Turbo Mode implementation makes Core i7-800 and Core i5-700 performance really impressive not only under multi-threaded load but also in applications using only one or two threads. And we should give Intel due credit for that because the second Turbo Mode version implemented in the new Lynnfield CPUs helps to make sure that the right number of processor cores is involved at all times.