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6 core cpu only shows as 4 core outside bios

Raulfin
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Recently got an i7 5820K 6 core hyperthreaded cpu and noticed that everything but bios only shows a quad core (nzxt's CAM) or hyperthreaded quad core (task manager). Mobo is Asus X99-A/usb 3.1 (BIOS vr. 3005)

Windows 10 Pro 64-bit
ASUS X-99A/usb3.1 Motherboard

ASUS ROG Strix GTX 1070

Intel i7-5820K

32GB RAM G.Skill Ripjaws V Series DDR4-2400

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there is a much newer bios, I suggest you to should flash it.

https://www.asus.com/Motherboards/X99AUSB_31/HelpDesk_Download/

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Try running a cpu benchmark to see if performance is as expected, or similar to a 4 core

Cpu: Ryzen 2700 @ 4.0Ghz | Motherboard: Hero VI x370 | Gpu: EVGA RTX 2080 | Cooler: Custom Water loop | Ram: 16GB Trident Z 3000MHz

PSU: RM650x + Braided cables | Case:  painted Corsair c70 | Monitor: MSI 1440p 144hz VA | Drives: 500GB 850 Evo (OS)

Laptop: 2014 Razer blade 14" Desktop: http://imgur.com/AQZh2sj , http://imgur.com/ukAXerd

 

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Make sure you haven't disabled any cores in the BIOS. I'd also flash the new one as suggested above, they might've fixed it.

CPU: i7 6700k (4.7 GHz) | GPU: EVGA GTX 1070 FTW (OC) | Motherboard: ASUS Sabertooth Z170 S | Cooling: Corsair H110i GTX | Storage: 250GB Samsung 850 EVO M.2 + 1TB WD Black | RAM: 16GB (2x8) Corsair Vengeance LED (White) 3000MHz | Case: Phanteks Enthoo Evolv ATX | PSU: Corsair RM850i | WiFi Card: TPLink Archer T9E | Case Fans: Noctua iPPC-2000 PWM (3x 120mm in), 2x Noctua NF-A14 PWM 140mm (radiator, painted black), Fractal Venturi HP-14 (1x 140mm out)  | OS: Windows 10 Home 64-bit

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  • Author

ty got the new bios, gonna run a cpu benchmark then flash and run again.

 

Windows 10 Pro 64-bit
ASUS X-99A/usb3.1 Motherboard

ASUS ROG Strix GTX 1070

Intel i7-5820K

32GB RAM G.Skill Ripjaws V Series DDR4-2400

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Flashed bios, its showing v 3301 now, but everything is still showing 4/8 core. cenibench score was 780. All core enabled in bios and device manager is showing 12 processors. nzxt CAM still shows bios 3305 though.

Windows 10 Pro 64-bit
ASUS X-99A/usb3.1 Motherboard

ASUS ROG Strix GTX 1070

Intel i7-5820K

32GB RAM G.Skill Ripjaws V Series DDR4-2400

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