How much of a risk is running a 14700kf on a 850w psu?

[iameatingjam]

I've had a different experience - basically all intel boards overvolt the crap out of the stock chips, you can run full all core boost and even the 2 core turbo with an undervolt and less that stock power limits all day.

here's a stock 13700K pulling 200W in cinebench with just loadline settings less aggressive setting in the bios:
View attachment 318639

Undervolting will give you stock performance with massively reduced heat and power requirements. The 14700K has a better voltage regulator than a 13700k so in theory you should be able to get even better results at the same volts.

Interesting.

Do get the same result in gaming? Same performance and reduced power and heat?

 

[phanbuey]

Interesting.

Do get the same result in gaming? Same performance and reduced power and heat?

Absolutely - I actually get slightly better performance since I pumped the ring to 4.8 Ghz as well.

^ current cyberpunk sits at 95W with peaks into 146W in a CPU-heavy save (running around a crowded area)

That used to be 110W avg with peaks into the 180W territory.

 

[benbird7]

Thinking of upgrading from a 13600kf to 14700k/kf. I really want those two more p-cores plus the extra boost clocks (have a b760 board so no overclocking for me). And yes I'm aware the upgrade isn't going to be huge, so please don't tell me its not worth it, because thats not what I'm asking. I'm just not planning on upgrading my mobo for a long time and was hoping this would help me ride out the next few generations of cpu.

Anyway I want to know how risky it will be to run it on my 850w psu. The psu calculators I've used put it right on edge, the newegg one said 800-900w is recommended. Another one told me 840w is needed. Even still I find it highly unlikely my cpu and gpu will ever run at full capacity at the same time. Its pretty rare for either one of them to run at full capacity. My 4090 usually doesn't go over 200w since I limit it to 60 fps most of the time, and also use dlss when its avaliable.

Now the thing is, I have 5 ssds in my system, 3 2tb gen 4 nvmes, and two sata mx500s. All of them have dram, which use slightly more power as I understand it. I also have 32gb ddr5 running at 1.5v, I'm not sure what that means for wattage, can't imagine its that much....?

I'm hoping undervolting will be avaliable just incase but I am not 100% sure, I used a microcode downgrade feature avaliable in a recent version of my bios to make it possible, and was able to reduce temps under full load by ~12c with the 13600kf, but I turned it off since atm I don't need it.

I asked gigabyte twice if the feature that allows this will be compatible with the 14700k, and they just don't answer or answer a completely different question, which this time was "The 14700k is compatible with your motherboard, as long as you update the bios" which I obviously knew, otherwise I wouldn't ask the question. I'm guessing the support team just doesn't know the answer or possibly didn't even understand the question... idk.

Oh and if I were to put in place intel's recommended power limits, how would that affect the cpu? Would it still allow me to run all p-cores at 5.5ghz sustained (in gaming loads)? I could also disable some of the ecores to save power, I know they can help in gaming but somehow I doubt 12 is going to help me more than 8.

The PSU is "GP-UD850GM PG5"

I've got a CORSAIR - TX750M and was expecting to need to upgrade after replacing my 12700kf with a 14700k last week as it's paired with a 4090.

Remainer of components are a z690 MSI pro-a ddr4 mobo, 4x8gb sticks RAM, 2xhdd, 3xssd, 4xm.2, 3 case fans, 240mm liquid freezer 2 aio, a number of usb devices (about 6) and reverb g2 VR headset.

Slight undervolt on CPU (5.6p 4.5e 4.5r) and GPU (1850mhz +500mem) for temps but with the clocks shown in brackets to maintain core speeds (managed increase from benchmark attached to 5.6p with 1.3vcore, 5.5p was 1.25v).

It pulls 700w at the plug (have one that monitors) running cb23/ibt/p95. During a flight sim session it generally sits at about 400-500w.

Was expecting to have to upgrade to a 1000w PSU but haven't needed to.

Btw the 14700k isn't allowing any overclock on my 3600mhz ram just allows xmp profile. I used to get 4000 on my 12700kf's imc but don't really want to have to upgrade motherboard as 14th gen is last supported socket.

 

[iameatingjam]

Btw the 14700k isn't allowing any overclock on my 3600mhz ram just allows xmp profile. I used to get 4000 on my 12700kf's imc but don't really want to have to upgrade motherboard as 14th gen is last supported socket.

That was actually another concern I had, because it took me a lot of time to get my memory stable where it is right now. And was worried a cpu upgrade might upset things. Its 5600 cl36 ram running at 6400 cl30. In theory you'd think a 14700k wouldn't have a worse imc though I realize there's the lottery to consider.

 

[phanbuey]

That was actually another concern I had, because it took me a lot of time to get my memory stable where it is right now. And was worried a cpu upgrade might upset things. Its 5600 cl36 ram running at 6400 cl30. In theory you'd think a 14700k wouldn't have a worse imc though I realize there's the lottery to consider.

It's basically the same chip - you should be fine with DDR5. whats more likely is that MSI needs to update the subtimings/pre training settings in the bios to allow higher speeds on 14th gen.

@benbird7 Are you just not posting or is it unstable?

 

[benbird7]

It's basically the same chip - you should be fine with DDR5. whats more likely is that MSI needs to update the subtimings/pre training settings in the bios to allow higher speeds on 14th gen.

@benbird7 Are you just not posting or is it unstable?

Hi phanbuey, thanks for the reply, it's posting but getting errors running cb23 after about 15 mins also IBT.

I also got an error at 5.6p so have gone back to 5.5p with 1.28vcore on the 14700k.

Cheers

 

[iameatingjam]

Well I just got the bad news from gigabyte

Dear Customer,

We have checked with our team and here is the answer regarding to the bios code.

Add CPU uCode 0x104 select option - only supports 13th gen K-sku CPU.

that means other 12th gen, 14th gen CPU are not supported.

If this is correct that means no undervolting for me. That makes me kind of nervous. I've already ordered the cpu. I even bought some p12 max fans for my aio to improve cooling. I sure hope its all enough without undervolting.