Are Haswell Xeon CPUs overclockable?

That's because these are enterprise CPUs really meant for servers. It just so happens that some of them are available via retail channels to use for workstations. The REAL Xeons (E7s) have no retail availability:

http://ark.intel.com/products/family/78584/Intel-Xeon-Processor-E7-v2-Family

The point you are missing is that if the E5-2699 V3s were unlocked they could be both an enterprise CPU AND a flagship ultra high-end enthusiast CPU that people could buy and overclock if they wanted the absolute best that Intel has to offer and were willing to pay the price of admission. It could do both roles with ZERO detriment, compromise or risk to it's original position as an enterprise CPU. Right now, Intel has no ultra high-end overclockable CPU. Don't even mention the i7-5960X...it's not in the same league.
 
The point you are missing is that if the E5-2699 V3s were unlocked they could be both an enterprise CPU AND a flagship ultra high-end enthusiast CPU that people could buy and overclock if they wanted the absolute best that Intel has to offer and were willing to pay the price of admission. It could do both roles with ZERO detriment, compromise or risk to it's original position as an enterprise CPU. Right now, Intel has no ultra high-end overclockable CPU. Don't even mention the i7-5960X...it's not in the same league.

You want a faster CPU then buy a WS board that can support two or four. Problem solved, no OCing needed.
 
You want a faster CPU then buy a WS board that can support two or four. Problem solved, no OCing needed.

Adding more CPUs adds the ability to accelerate properly multithreaded workloads only and does nothing for the single threaded performance detriment inherent to the high core count chips (like the E5-2699 V3). Having two overclocked E5-2699 V3 CPUs on a capable motherboard would result in a system that could tackle the vast majority of the multithreaded threaded workloads out there and provide incredible performance while doing so, while at the same time providing excellent single threaded performance as well.

Power users would no longer have to choose between having excellent single threaded performance and having excellent multi threaded performance, but would instead have one platform that would provide both.

All Intel would have to do is to unlock the E5-2699 V3 and only this SKU. Business users using this CPU in servers wouldn't be affected at all and it would open the door for power users that desire the best performance possible to finally purchase this performance.
 
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