Desktop builder & OC
Join Date: Feb 2011
Location: British living in Japan
I may be missing something, but I just purchased the ks. Out of the box it will Turbo to 5GHz on ALL cores. You could remove time limit in mobo.
Or, if you like it's easy to disable turbo and set the multi to 50. Then (like mine) High power plan, or any load on any power plan will set it to 5MHz.
It's only an above spec OC in terms of how much time it will spend at all cores 5GHz.
I have kept speed step and speed shift on. C1 auto, all other C states OFF. This way unless on High power plan the CPU will quickly downclock
to 800MHz when idle.
Should work on stock voltage IF you have a good cooling solution.
Then from that calculate offset if you wish to go up higher. 5.2GHz should be possible on all cores with offset change (I can't say what because it is
never the same, I have use a minus offset value. Regardless, this SKU demands good liquid cooling, AIO. Personally I just don't think anything on air
will cut it. Too slow to respond, and wow, these chips suck up the juice. That reminds me, good mobo, most important high quality VRMs.
I use an Asrock Phantom X - released for this cpu in particular back in June. It is 14 phase, chunky VRM cooler, and high quality VRM components to boot.
Not cheap, but less than the CPU of course. X supersedes the Phantom 9 which is also good enough. The X may even be overkill, but I'd rather that than
I didn't use silicon lottery shop (I have before) as ks is soldered, and Intel bin them. Supposedly only the best 9900 are put in the ks bracket,
the rest are regular i9 9900k. Same chip, but binned. It also means that for a while it's less likely to get a golden 9900k as the golden ones
will be set to ks config.
Let us know how it goes! Enjoy!!
i7 8086k de-lidded @ 5.20GHz. GTX1080ti ftw 3. Taichi z370.
Trident z cl15 2 x 8GB sticks. Acer XB270HU 1440p 144Hz IPS 27 inch G-Sync