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Melodist

9900k voltage dramatically up from 4.8 to 4.9 GHz?

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Posted · Original PosterOP

Hello there,

 

I've been overclocking my 9900k and realized it's running with 1.225 volts at 4.8 GHz but only starts to be stable with 4.9 starting at 1.29 volts, is that normal or may I have to tweak something because the gap here from one to another speed is huge in terms of what voltage I have to add.

 

965545982_4_8GHz.jpg.28463a21d2117ea9634614fc055466e2.jpg

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Just install a decent cooler, you will be just fine

I run my 9700k with a crap 40$ air cooler and i am just fine (summer here ambient ~30c)


CPU:i7 9700k 5047.5Mhz All Cores Mobo: MSI MPG Z390 Gaming Edge AC, RAM:Corsair Vengeance LPX 16GB 3200MHz DDR4 OC 3467Mhz GPU:MSI RTX 2070 ARMOR 8GB OC Storage:Samsung SSD 970 EVO NVMe M.2 250GB, 2x SSD ADATA PRO SP900 256GB, HDD WD CB 2TB, HDD GREEN 2TB PSU: Seasonic focus plus 750w Gold Display(s): 1st: LG 27UK650-W, 4K, IPS, HDR10, 10bit(8bit + A-FRC). 2nd: Samsung 24" LED Monitor (SE390), Cooling:Fazn CPU Cooler Aero 120T Push/pull Corsair ML PRO Fans Keyboard: Corsair K95 Platinum RGB mx Rapidfire Mouse:Razer Naga Chroma  Headset: Razer Kraken 7.1 Chroma Sound: Logitech X-540 5.1 Surround Sound Speaker Case: Modded Case Inverted, 5 intake 120mm, one exhaust 120mm.

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Normal (my 4.9 all core is at 1.3), and also unfortunately highly variable between chips (very broad silicon lottery on 9900k).  I have heard all core 5.0's from as low as 1.27 all the way up to 1.37 from talking with different people.


Main PC:  i9-9900k, Noctua D15 (+chromax!), z390 Gigabyte Aorus Master, 32 gb corsair LPX 3000 mHz, Strix RTX 2080 ti, Samsung 970 evo 500GB, 970 evo+ 1Tb, Seagate 3 Tb HDD, Fractal Define R6, EVGA 850w PSU.  Sennheiser HD 6XX headphones (w/ soundblaster G6 DAC/amp), yeti mic, Bose desk speakers.  Ducky One-2 mini + logitech G403 Hero

 

Work PC: Ryzen 2700x, wraith prism cooler, ASrock B450 mini-itx, 32 gb corsair LPX 3000 mHz, F.E. RTX 2070, Samsung QVO 1Tb, WD blue 1Tb, InWin A1 plus black case, 650w gold PSU (included w/ case).  Sennheiser PC37x.  Ducky One-2 mini + logitech G403 Hero

 

esports LAN on the cheap: Ryzen 2200g, ASrock B450 mini-itx, 16 gb corsair LPX 2400 mHz, EVGA GTX 760, WD blue 1Tb m.2, Silverstone ML08, Corsair SF450w.  Steelseries arctis headphones.  Any mouse and keyboard someone has sitting around.

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Also the gaps arent always linear, mine is OK from 4.8-5.0 but to get 5.1 voltage requirement jumps very substantially (with enough heat to keep my office warm in the winter time lol)


Main PC:  i9-9900k, Noctua D15 (+chromax!), z390 Gigabyte Aorus Master, 32 gb corsair LPX 3000 mHz, Strix RTX 2080 ti, Samsung 970 evo 500GB, 970 evo+ 1Tb, Seagate 3 Tb HDD, Fractal Define R6, EVGA 850w PSU.  Sennheiser HD 6XX headphones (w/ soundblaster G6 DAC/amp), yeti mic, Bose desk speakers.  Ducky One-2 mini + logitech G403 Hero

 

Work PC: Ryzen 2700x, wraith prism cooler, ASrock B450 mini-itx, 32 gb corsair LPX 3000 mHz, F.E. RTX 2070, Samsung QVO 1Tb, WD blue 1Tb, InWin A1 plus black case, 650w gold PSU (included w/ case).  Sennheiser PC37x.  Ducky One-2 mini + logitech G403 Hero

 

esports LAN on the cheap: Ryzen 2200g, ASrock B450 mini-itx, 16 gb corsair LPX 2400 mHz, EVGA GTX 760, WD blue 1Tb m.2, Silverstone ML08, Corsair SF450w.  Steelseries arctis headphones.  Any mouse and keyboard someone has sitting around.

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Posted · Original PosterOP

Yeah but going from 4.8 at 1.225 to 4.9 at 1.29 is huge? Like, it's not worth putting that much voltage on it for mere a 100 MHz merit and having to deal with high temps.

 

With 4.8 at 1.225, it runs 80 degrees package temp Prime 95 AVX full load on a Noctua NH-U12A.

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Posted · Original PosterOP
1 hour ago, Zberg said:

Normal (my 4.9 all core is at 1.3), and also unfortunately highly variable between chips (very broad silicon lottery on 9900k).  I have heard all core 5.0's from as low as 1.27 all the way up to 1.37 from talking with different people.

I saw a delidded 9900k with custom IHS going under 1.2v so yeah :/

 

But I'm wondering whether i'm stressing my CPU too much with Prime 95 FFT 12 because der b8uer is running 1344 and I only benched my 6900k back in the day with 1344 either. Maybe I should test it with 1344?

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47 minutes ago, Melodist said:

I saw a delidded 9900k with custom IHS going under 1.2v so yeah :/

 

But I'm wondering whether i'm stressing my CPU too much with Prime 95 FFT 12 because der b8uer is running 1344 and I only benched my 6900k back in the day with 1344 either. Maybe I should test it with 1344?

For Intel, anything under 1.35 is safe with 1.4 being on the edge.

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Achievable clock speeds and required voltage are not linear.  You should aim for a sound balance of speed, temperatures and voltage imho. Sometimes that last few hundred MHz just simply don't worth the effort and extra volts. 


Please, whenever I make a grammatic mistake, correct it. I have been told, that my grammar is borderline abysmal. I would like to improve it. Your feedback is invaluable!

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Posted · Original PosterOP

332810235_4_9GHz.jpg.f25fc2f819970796b1a38d9317a108d3.jpgBut then again, is maybe my stress testing too tough? I'm doing 12k small ffts in Prime 95 and I saw der b8uer testing his CPUs on 1344?

 

 

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