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Time to replace my aging 3970X in my 2nd rig and wanted to build a Z390 system with a 9900K or 9900KF CPU.

The thing is, the "KF" is the one without the i-GPU so does that mean it can OC better? Or is there no real difference between the two? The "KF" is slightly more expensive but that's not an issue if it is a better CPU overall.

Also, what is the BEST motherboard for the Z390 platform? I don't care about price - I want highest OC with the fastest RAM (32GB) and will be using 2x 2080 Ti in SLI/NVLink.

TIA.
 

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Apparently the 9400F isn't soldered, so if that's true too with the 9900F I definitely wouldn't buy it.

And no, it doesn't OC better - just like the 2550K didn't OC any better than the 2500K.
 

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Hardware Princess
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I think it still physically has the iGPU on board. They are just ones that had a bad iGPU during manufacturing so they disabled it.
 

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I think it still physically has the iGPU on board. They are just ones that had a bad iGPU during manufacturing so they disabled it.

I thought the same thing, but at least with the 9400F the die is (?) smaller. It's wider but it's a lot shorter, it seems like they removed something.

 
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Time to replace my aging 3970X in my 2nd rig and wanted to build a Z390 system with a 9900K or 9900KF CPU.

The thing is, the "KF" is the one without the i-GPU so does that mean it can OC better? Or is there no real difference between the two? The "KF" is slightly more expensive but that's not an issue if it is a better CPU overall.

Also, what is the BEST motherboard for the Z390 platform? I don't care about price - I want highest OC with the fastest RAM (32GB) and will be using 2x 2080 Ti in SLI/NVLink.

TIA.
So far nobody has found an actual advantage to the KF parts for the buyer unless they are offered for less money. They appear to be just K parts that had a defective iGPU so it's been deactivated.

We will need to see some overclocking comparisons to really know for sure, but due to the variations in the overclocking capabilities from one part to the next, it will probably take some sort of statistics gathering over many parts before we can see a trend (PassMark or Silicon Lottery perhaps).

Personally, I'd think the place they would fit best would be in a pre-made system (like say a Dell) that comes with a graphics card. Then, presumably, Intel would offer Dell some sort of discount for the F or KF parts vs. the K parts. If selling at the same price as the K, I don't know why anyone would buy the F or KF parts.

If the KF was actually a new chip layout with the iGPU physically removed and the CPU cores spaced out more and thus offered better cooling, then Intel might actually have a better part for overclockers who use an external GPU, but so far I haven't seen any sign that this is that.
 

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Time to replace my aging 3970X in my 2nd rig and wanted to build a Z390 system with a 9900K or 9900KF CPU.

The thing is, the "KF" is the one without the i-GPU so does that mean it can OC better? Or is there no real difference between the two? The "KF" is slightly more expensive but that's not an issue if it is a better CPU overall.

Also, what is the BEST motherboard for the Z390 platform? I don't care about price - I want highest OC with the fastest RAM (32GB) and will be using 2x 2080 Ti in SLI/NVLink.

TIA.

'KF', post silicon lottery and unless binned differently, should give you a smidgen of extra headroom simply because of slightly lower temps, compared to iGPU not being completely cut off, but the difference may be so minor, it may be hard to tell. EVGA Dark Z390 seems to have the right kind of VRM and is seriously optimized for RAM OC (Buildzoid's review here
but note that it only comes with 2x DDR4 slots (because it is optimized for RAM OC !). Other than that, Gigabyte Aorus Z390 seems to have quite a following...
 

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So far nobody has found an actual advantage to the KF parts for the buyer unless they are offered for less money. They appear to be just K parts that had a defective iGPU so it's been deactivated.

We will need to see some overclocking comparisons to really know for sure, but due to the variations in the overclocking capabilities from one part to the next, it will probably take some sort of statistics gathering over many parts before we can see a trend (PassMark or Silicon Lottery perhaps).

Personally, I'd think the place they would fit best would be in a pre-made system (like say a Dell) that comes with a graphics card. Then, presumably, Intel would offer Dell some sort of discount for the F or KF parts vs. the K parts. If selling at the same price as the K, I don't know why anyone would buy the F or KF parts.

If the KF was actually a new chip layout with the iGPU physically removed and the CPU cores spaced out more and thus offered better cooling, then Intel might actually have a better part for overclockers who use an external GPU, but so far I haven't seen any sign that this is that.
If like 9400 images its not soldered (i through they just solder the top 9700-9900K, im wrong), it maybe have a chance of having thinner diffusion barrier which would made it much better to just delid and apply metal tim.
Clearly its not a new chip, its some kind of binning, but there surfaced also some news of the 9900KFC edition (no pun intended), it will be interesting to check what those chips really are and if they perform somewhat differently.

https://www.anandtech.com/show/13967/intel-core-i9-9900kfc-processor
 

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There is no difference in overclocking with the KF.
 

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Time to replace my aging 3970X in my 2nd rig and wanted to build a Z390 system with a 9900K or 9900KF CPU.

The thing is, the "KF" is the one without the i-GPU so does that mean it can OC better? Or is there no real difference between the two? The "KF" is slightly more expensive but that's not an issue if it is a better CPU overall.

Also, what is the BEST motherboard for the Z390 platform? I don't care about price - I want highest OC with the fastest RAM (32GB) and will be using 2x 2080 Ti in SLI/NVLink.

TIA.
I figured I'd chime in as someone who has built multiple systems using the KF for clients along with running the KF in two of my rigs at the office.

For what it's worth with all speculations aside, here is my real world data:

All of my KF's that I've tested did 50x without blinking twice...with water they all could hit 51x and 90% of them could do 52x with respectable voltages.

My two KF's can do 53x on just a 360 aio.

https://www.3dmark.com/fs/21227886

Therefore, in my specific scenario ...generally the KF's have performed better with more head room than the newer K / RO K's and even scaled better than some older (yet of the newer) PO's. (cpu stepping)

Z390 Motherboard wise, IMO hands down the Z390 Dark can't be touched IMO both at it's price point and even above it. It's an excellent board... well the best board Z390 board period. (IMO and many actual OC'ers would agree.)

For the mid $250 range Z390's the Aorus Z390 Master is a top pick for me...yes even over Asus all day. Asus had their glory in the Z370 era, but with the Z390's GB/Aorus really hit a home run this time around... There are several benchers like me who have also found the newer Asus Z390's very frustrating with various issues when overclocking..

I've build systems with all the popular boards and find the GB/Aorus Z390 Master to be far better built than even Asus boards...The Aorus 390 is Strong.

Here is my 5.5GHz Validation with my 9900K on this board. https://valid.x86.fr/flvj1i

Here's a 5.5GHz Fire Strike run on the Z390 Master: https://www.3dmark.com/fs/19312174

* Note: This is from my main desktop rig...

Hope this helps... if you have any specific questions feel free to DM me.

Cheers
 

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Hardware Princess
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I figured I'd chime in as someone who has built multiple systems using the KF for clients along with running the KF in two of my rigs at the office.

For what it's worth with all speculations aside, here is my real world data:

All of my KF's that I've tested did 50x without blinking twice...with water they all could hit 51x and 90% of them could do 52x with respectable voltages.

My two KF's can do 53x on just a 360 aio.

https://www.3dmark.com/fs/21227886

Therefore, in my specific scenario ...generally the KF's have performed better with more head room than the newer K / RO K's and even scaled better than some older (yet of the newer) PO's. (cpu stepping)

Z390 Motherboard wise, IMO hands down the Z390 Dark can't be touched IMO both at it's price point and even above it. It's an excellent board... well the best board Z390 board period. (IMO and many actual OC'ers would agree.)

For the mid $250 range Z390's the Aorus Z390 Master is a top pick for me...yes even over Asus all day. Asus had their glory in the Z370 era, but with the Z390's GB/Aorus really hit a home run this time around... There are several benchers like me who have also found the newer Asus Z390's very frustrating with various issues when overclocking..

I've build systems with all the popular boards and find the GB/Aorus Z390 Master to be far better built than even Asus boards...The Aorus 390 is Strong.

Here is my 5.5GHz Validation with my 9900K on this board. https://valid.x86.fr/flvj1i

Here's a 5.5GHz Fire Strike run on the Z390 Master: https://www.3dmark.com/fs/19312174

* Note: This is from my main desktop rig...

Hope this helps... if you have any specific questions feel free to DM me.

Cheers
I agree on the Z390 Dark, mine is running happily at 5.4 GHz 24/7 with my 3200 ram at 4600 :)
 

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For several months, best 9900K are binned to 9900KS, so greater chance to get a better OC chip with 9900KF...

9900KS aren't binned 9900K's and neither is the 9900KF

9900KS is just a 9900K with a stock voltage and clock speed bump, that's not what binning is.

9900KF is a 9900K without the IGP, that's not what binning is either.

8086K was a binned 8700K, they clocked higher and had the same default VID as the 8700K.
 

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9900KS aren't binned 9900K's and neither is the 9900KF

9900KS is just a 9900K with a stock voltage and clock speed bump, that's not what binning is.

9900KF is a 9900K without the IGP, that's not what binning is either.

8086K was a binned 8700K, they clocked higher and had the same default VID as the 8700K.
Silicon Lottery disagree:

9900K 4.80GHz 1.275V 100%
9900K 4.90GHz 1.287V Top 91%
9900K 5.00GHz 1.300V Top 30%
9900K 5.10GHz 1.312V Top 5%

9900KF 4.80GHz 1.275V 100%
9900KF 4.90GHz 1.287V Top 92%
9900KF 5.00GHz 1.300V Top 37%
9900KF 5.10GHz 1.312V Top 8%

9900KS 4.90GHz 1.225V 100%
9900KS 5.00GHz 1.250V Top 95%
9900KS 5.10GHz 1.287V Top 28%
9900KS 5.20GHz 1.325V Top 8%
 

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Hardware Princess
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Silicon Lottery disagree:

9900K 4.80GHz 1.275V 100%
9900K 4.90GHz 1.287V Top 91%
9900K 5.00GHz 1.300V Top 30%
9900K 5.10GHz 1.312V Top 5%

9900KF 4.80GHz 1.275V 100%
9900KF 4.90GHz 1.287V Top 92%
9900KF 5.00GHz 1.300V Top 37%
9900KF 5.10GHz 1.312V Top 8%

9900KS 4.90GHz 1.225V 100%
9900KS 5.00GHz 1.250V Top 95%
9900KS 5.10GHz 1.287V Top 28%
9900KS 5.20GHz 1.325V Top 8%
While I would agree that those statistics indicate an advantage for the 9900KF over the 9900K, it seems like a very small advantage. I would probably go for whichever one is cheaper
 

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For several months, best 9900K are binned to 9900KS, so greater chance to get a better OC chip with 9900KF...
The first part is true... the KS is an actual binned K (better cut of the steak), but as for the KF it's really a toss up, because that cut could come from any part of the wafer, however, it's likely that the KF's are closer to the outside of the wafer than the middle which often are the best binned chips...

I agree on the Z390 Dark, mine is running happily at 5.4 GHz 24/7 with my 3200 ram at 4600 :)
Very nice. What voltage are you running 54x at? I'm assuming your on water as well with great cooling? Do you have any benchmarks to share?

I can also confirm that my G.Skill 4600 Royalz worked / posted at 4600 without a sweat. Excellent board.

9900KS aren't binned 9900K's and neither is the 9900KF

9900KS is just a 9900K with a stock voltage and clock speed bump, that's not what binning is.

9900KF is a 9900K without the IGP, that's not what binning is either.

8086K was a binned 8700K, they clocked higher and had the same default VID as the 8700K.
All of the 9900's come from the same wafer. The KS is just the filet mignon so essentially it is a different cut of meat entirely and is not an actual K, whereas the K itself is like the new york steak T bone cut etc... The KF can be from any part of the wafer as it's obviously a cut with a bad igpu, but that particular cut could come from either close to the middle and/or towards the outer part of the wafer, which would determine its "bin," quality...

That's why some KF's are really good and some are mediocre.

The 8086K is also the filet mignon of the same wafer that the 8700K comes from...

Silicon Lottery disagree:

9900K 4.80GHz 1.275V 100%
9900K 4.90GHz 1.287V Top 91%
9900K 5.00GHz 1.300V Top 30%
9900K 5.10GHz 1.312V Top 5%

9900KF 4.80GHz 1.275V 100%
9900KF 4.90GHz 1.287V Top 92%
9900KF 5.00GHz 1.300V Top 37%
9900KF 5.10GHz 1.312V Top 8%

9900KS 4.90GHz 1.225V 100%
9900KS 5.00GHz 1.250V Top 95%
9900KS 5.10GHz 1.287V Top 28%
9900KS 5.20GHz 1.325V Top 8%
Although I don't fully agree with SL's metrics... from a pure data stand point I can see your point. It looks like my KF's, K's and KS are pretty much top tier, as expected. Out of all the K's I've tested with client builds etc... every single one could hit 50x easily so that's why I disagree with SL's testing methodology. Their voltages are insane too..which is not practical for daily usage...

While I would agree that those statistics indicate an advantage for the 9900KF over the 9900K, it seems like a very small advantage. I would probably go for whichever one is cheaper
Pretty much. For the average gamer 50x is plenty enough and they should have no issues hitting that with a decent cooling.

Wow I had no idea my 9900K 5.1/4.8 @ 1.295v under load was such a high bin chip
What's your vdroop like? Are you running static or have it configured with an offset? Your K must be a P0 (stepping?) ..ie... one of the original batches of the 9900K's?
 

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What's your vdroop like? Are you running static or have it configured with an offset? Your K must be a P0 (stepping?) ..ie... one of the original batches of the 9900K's?
I'm on an EVGA Z390 DARK running +25% VDROOP. 1.335v in BIOS, 1.290-1.295v under load. I run override (static), with all c-states/speedstep turned off. I'm old-school lol. I purchased my 9900K from Microcenter in June-ish 2019 I believe? It is a P0 stepping.
 
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