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How does Windows handle multi socket turbo boost.

Aggravated Salmon
By Aggravated Salmon
in Windows
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Imagine a build with 4 CPUs (E7-8895 V2) (15 Core each 2.8Ghz) (Turbo Boost: 4/4/4/4/4/6/6/6/6/7/7/7/7/8/8)

Lets say a workload utilizing 8 cores is put on the machine, will Windows 'use' 8 cores from CPU0, or split 2 cores per CPU?

If 2 cores are split, will it be right to say that the machine will turbo to 3.6Ghz?

Main Rig: CPU Intel Xeon X5660 (4.55Ghz @ 1.45v) / MOBO Asus ROG Rampage III Extreme / RAM 16GB Corsair Vengeance LPX1866 MHz / CPU COOLER ID-COOLING Frostflow+ 240 / GPU EVGA Titan X Hybrid (+630 core + 400 memory) / CASE Cooler Master CM 690 II Advanced + transparent side panel / SSD Crucial M550 512GB / PSU Cooler Master Silent Pro Gold 1200W / DISPLAY 1440p monitor / KEYBOARD Topre Realforce RGB / MOUSE Corsair Glaive Aluminum RGB / SOUND Creative Labs. X-Fi SoundBlaster Elite Pro / ROUTER Netgear R9000 X10 Wireless ad / OS Windows 10 Pro / DRIVING WHEEL Logitech G27
 
Web Server Rig: CPU 2x Intel Xeon X5680 / MOBO Supermicro X8DTL-i / RAM 64GB (2X32GB) SK-Hynix ECC LRDIMMs / CPU COOLER ID-COOLING Frostflow+ 120 + Corsair H50 AIO / GPU MSI GTX 1070 Gaming X (+250core +300 memory) / CASE NZXT Lexa S / SSD Kingston 120GB / HDD 4 x 3TB WD RAID 6 / PSU Enermax MaxRevo 1500W / DISPLAY 900p monitor / KEYBOARD Logitech / MOUSE Logitech
 
Actually Portable Laptop: HP Spectre x360 15' (Late 2018) / i7-8750H, 16GB RAM, 512GB SSD, GTX 1050Ti MaxQ, 4K Display / KEYBOARD Ducky One 2 Mini / OS Linux Mint 19 Cinnamon / WIRELESS ADAPTER NETGEAR A6210 USB 3.0
 
Bed Laptop: ASUS VIVOBOOK 15 / i5-8250U, 8GB RAM, 1TB Toshiba HDD, UHD 630, 1080P Display / OS Linux Mint 19 Cinnamon

 

Backup Rig: CPU Intel Xeon X3470 (4Ghz @ 1.4v) / MOBO MSI P55-GD80 / RAM 16GB HyperX 1600Mhz / CPU COOLER ID-COOLING Frostflow+ 120 / GPU Sapphire R9 270X (+150 core + 200 memory) / CASE Cooler Master Elite 343 SSD Crucial MX150 250GB / PSU Seasonic SS430-GB / KEYBOARD Logitech G910 Orion Spark / MOUSE Logitech / DISPLAY Dell SE2417HGR / OS Windows 10 Pro / WIRELESS ADAPTER

TP-LINK Archer T6E PCI-E

 

Server 1: DELL POWEREDGE 1950 / 2x Intel Xeon E5450, 16GB ECC, 4x 3TB Western Digital (Various) 7200RPM SATA HDD in RAID 6, GT 640 / DISPLAY Lenovo L2251p

 

Server 2: DELL POWEREDGE 1950 / 2x Intel Xeon E5420, 8GB ECC, 2 x 160GB SAS, GT 210

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I think, in most cases, it's the program itself that chooses what to use and how to use it, based on how well/poorly it's optimised for that workload. Don't quote me on that tho.

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