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3930K only turbos up to 3.5 GHz when all cores are used

post #1 of 4
Thread Starter 
Before, if I recall correctly, when all cores were being used it would turbo up to 3.8 GHz. Now, it only turbos up to 3.5 GHz. It does turbo up to 3.8 GHz but only when fewer than all cores are being used. What's going on?

If you watch this video, you'll see a stock (if I am not mistaken) 3930K turboing up to 3.8 GHz during IntelBurnTest (which stresses all cores to the max). Mine only goes up to 3.5 GHz in this test.

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post #2 of 4
The 3930K is only supposed to turbo to 3.5GHz when all cores are in use.

Some motherboard makers have their boards use the max default turbo multiplier across all cores for better performance, and better looking benchmarks in reviews. This is usually perfectly stable, but is not strictly to spec. This has been referred to as Multi-core Ehancement.

Here is an article on the topic of: http://www.anandtech.com/show/6214/multicore-enhancement-the-debate-about-free-mhz
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5820K @ 4.3GHz, 1.225v Gigabyte X99 SOC Champion (F4m) 2x Sapphire R9 290X Tri-X OC New Edition (10036... 4x4GiB Crucial @ 2667, 12-12-12-28-T1, 1.35v 
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post #3 of 4
Thread Starter 
Ah, ok. I did update my BIOS so I guess the changes came with that.
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2 x Scythe GentleTyphoon 1850 rpm fans for H100 Microsoft Windows 10 Pro 64-bit Samsung SyncMaster S23A700D Microsoft SideWinder X4 
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Corsair Professional Series Gold AX850 Corsair Obsidian Series 650D Logitech G9x SteelSeries QcK mini 
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Intel Core i7-3930K GIGABYTE GA-X79-UD3 EVGA GeForce GTX 980 Ti Classified 16 GB Corsair Dominator Platinium DDR3 2133 MHz 
Hard DriveHard DriveOptical DriveCooling
Crucial m4 256 GB Western Digital Caviar Black 2 TB Pioneer BDR-206DBK Corsair Hydro Series H100 
CoolingOSMonitorKeyboard
2 x Scythe GentleTyphoon 1850 rpm fans for H100 Microsoft Windows 10 Pro 64-bit Samsung SyncMaster S23A700D Microsoft SideWinder X4 
PowerCaseMouseMouse Pad
Corsair Professional Series Gold AX850 Corsair Obsidian Series 650D Logitech G9x SteelSeries QcK mini 
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post #4 of 4
Sprkd1, in the bios they're is a option to put all turbo cores to 38.

type 38 in all of the turbo feature.

turbo core 1 = 38
turbo core 2= 38
turbo core 3 = 38
turbo core 4 = 38
turbo core 5 =38
turbo core 6 =38
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