A51M + 9900KS

Can anyone tell me if the 9900KS should be compatible with the 51M?

I have the 9900K now and while I'm not really into overclocking (stability is everything for me), a lot of reviews show the 9900KS running cooler (probably lower voltages thanks to the higher quality chip?) than to 9900K at the same clock speeds.

The work I do is usually thermally limited and I struggle to maintain full speeds for long... so I forsee a huge performance bump given our limited coolers, relative to what people are getting in desktops with big coolers.

Cheers!

 

Cost effectiveness is kind of the biggest concern here.

Even if you buy a KS, you still get to play with it so that its clocks are *lower* than out of the box. (Afiak)

By that rationale, wouldn't it be easier and *way* cheaper just to throttle your currently owned 9900k back using throttlestop or something similar? You can set it to only ever boosting to 4.4ghz or 4.5ghz ever, and possibly lower the voltage (Undervolt) so that it runs cooler any ways.

 

I think you missed two things..

Firstly, I have a top spec A51M so clearly cost effectiveness means very little to me XD

Secondly, I would like to run 5ghz on all cores for entire rendering sequences but the lack of cooler size prohibits this and it quickly reduces to ~4.3ghz chopping out perhaps 20% of my processing power.
We can't upgrade our coolers... so If the KS produces less heat at 5ghz than the K, then it stands to reason that it should maintain higher clock speeds with our limited cooler.

Put another way... both chips can hit 5ghz on all cores (the K via overclocking) but the K seems to produce more heat than the KS doing so, so it's not about what the chips are rated to do on paper, it's about what they can do within our limited cooling envelope.

I'm already sold on the fact this chip will be better, maybe substantially better if it can hold 5ghz boost on our cooler while the K is throttling back to 4.3ghz.. but I'm not sure if the bios will allow this chip to be fitted or not. I can't see anything regarding support for it. Has anyone tried?

 

you can make your K almost run like a KS by finding it's operating voltage, and than run a static voltage instead of adaptive. Running a static voltage will give you lower temperatures as AW boost the VID to keep the CPU from crashing. Do a bench on 5Ghz all core, and try to sea @which voltage 5Ghz will settle. From there you begin to set an static voltage, and undervolt by 0.010Mv at the time. Don't forget to undervolt the CPU, and CACHE equally since they're tied togheter. You can also undervolt the system agent lowering the power consumption from your mobo and the components attached to the mobo (RAM, PCH WIFI, etc) an 9900K should run 5Ghz @ 1.2V, maybe if you have an good chip, it can run 5Ghz @1.100, or 1.150Mv which is very good for such an high clockspeed. I run mine 1.120 max static and i have an 8950HK (BGA)

 

Nice, thanks for the tips! I'll give it a try

 

Both chips should be able to run 5.0GHz but the KS will run with crippled clock speed due lack of firmware support. Capped Power limits vs the K chips.

 

Thanks, thats the kind of information I was after. I suppose the A51M will likely never support this chip due to the power requirements?

I think I got a very bad 9900K in the lottery.. I can barely touch the clocks or voltage without it crashing. Maybe I'd achieve more by buying a siliconelottery binned chip and delidding it etc.

 

Yeah, you have two lottery options. Wait it out to see if Dell dare release KS support, jump on SL or new 9900K.

Empty for K/KF... https://siliconlottery.com/collections/all