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I7 8700 multi-core enchancement

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Hi! I posted a topic in the past asking about running the i7 8700 and i5 8400 at their max turbo speed. Now that I learned a few things about multi-core enhancement on intel motherboards and what it does I'm curious if it works for locked cpus. For example, with that feature enabled in the bios the 8700k runs all cores at 4.7 rather than the 4.3 stock. For unlocked cpus is obviously useless but for locked ones even 200mhz are welcome.

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It does not work, the only increase in their boost frequencies you can possible make having in mind they are Locked processors is overclock the BCLK if you have a Z370/390 motherboard keeping original turbo boost multipliers.

 

That means the best you can do with the i7 8700 is have it go from the stock 4.289 (4.3ghz) to 4.425~4.445 all cores boost with a BCLK of 102.75~102.85 higher base clock than that the new micro-code implemented in Kaby Lake era will not allow it to boot.

 

This is how it looks like:

Spoiler

bI345fm.jpg

Single Core is of 192~193

Personal Desktop":

CPU: Intel Core i7 8700 @4.45ghz |~| Cooling: Cooler Master Hyper 212X |~| MOBO: Gigabyte Z370M D3H mATX|~| RAM: 16gb DDR4 3333mhzCL16 G.Skill Trident Z |~| GPU: nVidia Founders Edition GTX 1080 Ti |~| PSU: Corsair TX650M 80Plus Gold |~| Boot:  SSD WD Green M.2 2280 240GB |~| Storage: 1x3TB HDD 7200rpm Seagate Barracuda + SanDisk Ultra 3D 1TB |~| Case: Fractal Design Meshify C Mini |~| Display: Toshiba UL7A 4K/60hz |~| OS: Windows 10 Pro.

Luna, the temporary Desktop:

CPU: Intel Core i7 10700KF @ 5.0Ghz (5.1Ghz 4-core) |~| Cooling: bq! Dark Rock 4 Pro |~| MOBO: Gigabyte Z490 UD |~| RAM: 32G Kingston HyperX @ 2666Mhz CL13 |~| GPU: AMD Radeon RX 6800 (Reference) |~| PSU: Corsair HX1000 80+ Platinum |~| Windows Boot Drive: 2x 512GB (1TB total) Plextor SATA SSD (RAID0 volume) |~| Linux Boot Drive: 500GB Kingston A2000 |~| Storage: 4TB WD Black HDD |~| Case: Cooler Master Silencio S600 |~| Display 1 (leftmost): Eizo (unknown model) 1920x1080 IPS @ 60Hz|~| Display 2 (center): BenQ ZOWIE XL2540 1920x1080 TN @ 240Hz |~| Display 3 (rightmost): Wacom Cintiq Pro 24 3840x2160 IPS @ 60Hz 10-bit |~| OS: Windows 10 Pro (games / art) + Linux (distro: NixOS; programming and daily driver)
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2 hours ago, Princess Cadence said:

It does not work, the only increase in their boost frequencies you can possible make having in mind they are Locked processors is overclock the BCLK if you have a Z370/390 motherboard keeping original turbo boost multipliers.

 

That means the best you can do with the i7 8700 is have it go from the stock 4.289 (4.3ghz) to 4.425~4.445 all cores boost with a BCLK of 102.75~102.85 higher base clock than that the new micro-code implemented in Kaby Lake era will not allow it to boot.

 

This is how it looks like:

  Reveal hidden contents

bI345fm.jpg

Single Core is of 192~193

Messing with bclk dropps the turbo completly. I know this from skylake. But if intel would allow it, they could go like 140 bclk thanks to how the cpu is designed.

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16 minutes ago, TheSponyX said:

Messing with bclk dropps the turbo completly. I know this from skylake. But if intel would allow it, they could go like 140 bclk thanks to how the cpu is designed.

Messing with BCLK also touches everything else, which may not have the ways to create the clock speeds that everyone else wants. This is why you can't push BCLK very far before the system doesn't boot in many cases

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1 hour ago, M.Yurizaki said:

Messing with BCLK also touches everything else, which may not have the ways to create the clock speeds that everyone else wants. This is why you can't push BCLK very far before the system doesn't boot in many cases

Skylake was like lga 775 cpus. Just ram and cpu frecuency were affected. Pcie and other not.

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3 hours ago, M.Yurizaki said:

Messing with BCLK also touches everything else, which may not have the ways to create the clock speeds that everyone else wants. This is why you can't push BCLK very far before the system doesn't boot in many cases

 

2 hours ago, TheSponyX said:

Skylake was like lga 775 cpus. Just ram and cpu frecuency were affected. Pcie and other not.

Since Skylake the base clock only messes with memory and CPU, and the only reason you can't still get awesome overclocks from it is because in Kaby Lake Intel added a microcode that will prevent boot if you reach 103mhz on the base in locked chips.

 

That's Intel to you, artificially stops you from getting the most of your product to force you the more expensive one.

Personal Desktop":

CPU: Intel Core i7 8700 @4.45ghz |~| Cooling: Cooler Master Hyper 212X |~| MOBO: Gigabyte Z370M D3H mATX|~| RAM: 16gb DDR4 3333mhzCL16 G.Skill Trident Z |~| GPU: nVidia Founders Edition GTX 1080 Ti |~| PSU: Corsair TX650M 80Plus Gold |~| Boot:  SSD WD Green M.2 2280 240GB |~| Storage: 1x3TB HDD 7200rpm Seagate Barracuda + SanDisk Ultra 3D 1TB |~| Case: Fractal Design Meshify C Mini |~| Display: Toshiba UL7A 4K/60hz |~| OS: Windows 10 Pro.

Luna, the temporary Desktop:

CPU: Intel Core i7 10700KF @ 5.0Ghz (5.1Ghz 4-core) |~| Cooling: bq! Dark Rock 4 Pro |~| MOBO: Gigabyte Z490 UD |~| RAM: 32G Kingston HyperX @ 2666Mhz CL13 |~| GPU: AMD Radeon RX 6800 (Reference) |~| PSU: Corsair HX1000 80+ Platinum |~| Windows Boot Drive: 2x 512GB (1TB total) Plextor SATA SSD (RAID0 volume) |~| Linux Boot Drive: 500GB Kingston A2000 |~| Storage: 4TB WD Black HDD |~| Case: Cooler Master Silencio S600 |~| Display 1 (leftmost): Eizo (unknown model) 1920x1080 IPS @ 60Hz|~| Display 2 (center): BenQ ZOWIE XL2540 1920x1080 TN @ 240Hz |~| Display 3 (rightmost): Wacom Cintiq Pro 24 3840x2160 IPS @ 60Hz 10-bit |~| OS: Windows 10 Pro (games / art) + Linux (distro: NixOS; programming and daily driver)
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