December 3, 2021

Intel Raptor Lake’s Particular VReg Tech Might Dramatically Cut back Energy Consumption


Intel Alder Lake
A patent utility filed by Intel suggests its next-gen Raptor Lake processors may implement a fairly intelligent mechanism to cut back energy utilization by as a lot as 25 %. Intel truly filed the patent again in January of 2020, however what it describes is just not current on its twelfth Gen Core Alder Lake processors that launched to retail earlier this month.

What sometimes occurs when shifting to a smaller node is the ensuing product brings with it higher energy effectivity. Architectural tweaks circuitously associated to smaller nodes can have the identical profit. Waiting for Raptor Lake, nonetheless, Intel’s patent utility hints it may implement a Digital Linear Voltage Regulator (D-LVR) for additional energy effectivity positive aspects.

Intel DLVR Patent Drawing
Click on to Enlarge (Supply: Intel by way of USPTO)

“The D-LVR is just not in collection with the primary energy circulation, however in parallel. By putting the digital-LVR in parallel to a major VR (e.g., motherboard VR), the CPU VID is lowered and the processor core energy consumption is lowered,” Intel explains in its patent utility. “The ability provide structure reduces the guard band for enter energy provide degree, thereby lowering the general energy consumption as a result of the motherboard VR specs might be changed, saving price and energy.”

A motherboard’s VRM implementation is likely one of the vital areas that separates high-end boards designed for fanatics and overclockers from the remainder of the crop. The meatier the VRM across the CPU, the higher outfitted a motherboard is to ship clear and constant voltage to the CPU, in flip probably rising stability and overclocking headroom (there’s extra to it than that).

In line with Intel, a D-LVR “drastically will increase the CPU efficiency” at only a small added price for the silicon and with some simple tuning. That is partially as a result of by putting a D-LVR in parallel to a major VR, processor cores draw much less energy and the efficient voltage a CPU operates at is thereby lowered.

Intel DLVR Powe Consumption Graphs
Click on to Enlarge (Supply: Intel by way of USPTO)
You possibly can dive into the total DLVR patent utility if you wish to get into the weeds of the tech, however the upshot is Intel’s declare that it’s potential to eradicate a big quantity of voltage. Within the graphs above, Intel highlights a 160mV financial savings, which interprets to round a 20-25 % lower in CPU energy.

“Right here, the portion displaying the facility saving past 40A doesn’t have in mind the D-LVR losses. On this instance, a 21 % drop within the CPU is translated to roughly 7 % efficiency achieve,” Intel explains.

It will likely be fascinating to see if Intel implements this into Raptor Lake and what we presume can be its accompanying 700 collection chipset. D-LVR may be additional down the roadmap. Raptor Lake is not anticipated to be a drastic departure from Alder Lake, and can as a substitute additionally pair performant Golden Cove cores with environment friendly Gracemont cores, simply the previous can be sooner with extra L2 cache whereas the latter will see a leap from eight cores to 16 cores.

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