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post #57641 of 67332
Quote:
Originally Posted by gertruude View Post

its not really high lol if he left this on auto it would show over 1.40 volts rolleyes.gif and how would it be working against him?

hes trying to figure out why he has to have a high vcore for such a low overclock

maybe its just a hungry chip

I dont want to quote anyone on this because its been a long while since it was brought up, I remember something about most cpu/nb needing an operating voltage of 1.15v for stock 2200 and normally being able to hit 2600 on 1.20v. I have my self tested this on my 8370 I sustain stability at both 2400 and 2600 at 1.20v and I am running 32gb of ram. I have recently started to experiment with aida and started upping the voltage on the core, cpu/nb, nb/ht, nb, vdda, and vddr. What I found was that too much voltage to the cpu/nb can hinder performance. Now just because this impacted my system does not mean it will effect others but at the same time it does not mean it cant. Essentially it is the same core and the same motherboard.
Medusa
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CPUMotherboardGraphicsRAM
FX 8370 5Ghz 2600/2600 32GB 24/7 Prime95 Stable... Asus Sabertooth 990fx r2.0 ASUS Radeon R9 390 DirectX 12 R9390-DC2-8GD5 8GB  CMY32GX3M4A2400C11R 
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Medusa
(23 items)
 
  
CPUMotherboardGraphicsRAM
FX 8370 5Ghz 2600/2600 32GB 24/7 Prime95 Stable... Asus Sabertooth 990fx r2.0 ASUS Radeon R9 390 DirectX 12 R9390-DC2-8GD5 8GB  CMY32GX3M4A2400C11R 
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Samsung 500GB Evo MZ-75E500B/AM Seagate  Asus DRW-24B1ST/BLK/B/AS NZXT Kraken X61 RL-KRX61-01 280mm 
CoolingCoolingCoolingCooling
NZXT Kraken X41 RL-KRX41-01 140mm NZXT Kraken G10 NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... 
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post #57642 of 67332
CPU-NB is rather tricky. To really get into it, you need to gauge performance/voltage set.

i.e., clock CPU-NB to 2600 with Voltage at 1.200, then slightly raise it to get the best performance and stability. It's a skewed relationship and you better do it systematically.

1.25 will always guarantee up to 2600 MHz but varies from chip to chip.
post #57643 of 67332
Quote:
Originally Posted by Kalistoval View Post

I dont want to quote anyone on this because its been a long while since it was brought up, I remember something about most cpu/nb needing an operating voltage of 1.15v for stock 2200 and normally being able to hit 2600 on 1.20v. I have my self tested this on my 8370 I sustain stability at both 2400 and 2600 at 1.20v and I am running 32gb of ram. I have recently started to experiment with aida and started upping the voltage on the core, cpu/nb, nb/ht, nb, vdda, and vddr. What I found was that too much voltage to the cpu/nb can hinder performance. Now just because this impacted my system does not mean it will effect others but at the same time it does not mean it cant. Essentially it is the same core and the same motherboard.

just to change topic what do u run your 8370 at and volts needed

and what temps do u get
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post #57644 of 67332
Quote:
Originally Posted by gertruude View Post

just to change topic what do u run your 8370 at and volts needed

and what temps do u get
Warning: Spoiler! (Click to show)









Medusa
(23 items)
 
  
CPUMotherboardGraphicsRAM
FX 8370 5Ghz 2600/2600 32GB 24/7 Prime95 Stable... Asus Sabertooth 990fx r2.0 ASUS Radeon R9 390 DirectX 12 R9390-DC2-8GD5 8GB  CMY32GX3M4A2400C11R 
Hard DriveHard DriveOptical DriveCooling
Samsung 500GB Evo MZ-75E500B/AM Seagate  Asus DRW-24B1ST/BLK/B/AS NZXT Kraken X61 RL-KRX61-01 280mm 
CoolingCoolingCoolingCooling
NZXT Kraken X41 RL-KRX41-01 140mm NZXT Kraken G10 NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... 
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Medusa
(23 items)
 
  
CPUMotherboardGraphicsRAM
FX 8370 5Ghz 2600/2600 32GB 24/7 Prime95 Stable... Asus Sabertooth 990fx r2.0 ASUS Radeon R9 390 DirectX 12 R9390-DC2-8GD5 8GB  CMY32GX3M4A2400C11R 
Hard DriveHard DriveOptical DriveCooling
Samsung 500GB Evo MZ-75E500B/AM Seagate  Asus DRW-24B1ST/BLK/B/AS NZXT Kraken X61 RL-KRX61-01 280mm 
CoolingCoolingCoolingCooling
NZXT Kraken X41 RL-KRX41-01 140mm NZXT Kraken G10 NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... 
CoolingCoolingOSMonitor
NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... Windows 7 x64 Pro HP W2207 
KeyboardPowerCaseMouse
Genius Corsair AX860i Corsair Graphite CC600TWM-WHT  Genius 
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post #57645 of 67332
That's also a hungry chip isn't it? I lost the bravery to run my new chip at that high VCore.

But why wouldn't I stop when I am already at 5.15 at 1.512? biggrin.gif
post #57646 of 67332
I cant call it that because of all chips its the only one I have ever had that managed 5Ghz, its the only chip I have ever run prime95 for 24hrs at that clock speed. Would like to see some one else do the same. I primed and also still used my rig to stream movies and shows and run runescape without it crashing, and I'm not talking 10 mins off and on I did that stuff for hours.
Medusa
(23 items)
 
  
CPUMotherboardGraphicsRAM
FX 8370 5Ghz 2600/2600 32GB 24/7 Prime95 Stable... Asus Sabertooth 990fx r2.0 ASUS Radeon R9 390 DirectX 12 R9390-DC2-8GD5 8GB  CMY32GX3M4A2400C11R 
Hard DriveHard DriveOptical DriveCooling
Samsung 500GB Evo MZ-75E500B/AM Seagate  Asus DRW-24B1ST/BLK/B/AS NZXT Kraken X61 RL-KRX61-01 280mm 
CoolingCoolingCoolingCooling
NZXT Kraken X41 RL-KRX41-01 140mm NZXT Kraken G10 NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... 
CoolingCoolingOSMonitor
NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... Windows 7 x64 Pro HP W2207 
KeyboardPowerCaseMouse
Genius Corsair AX860i Corsair Graphite CC600TWM-WHT  Genius 
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Medusa
(23 items)
 
  
CPUMotherboardGraphicsRAM
FX 8370 5Ghz 2600/2600 32GB 24/7 Prime95 Stable... Asus Sabertooth 990fx r2.0 ASUS Radeon R9 390 DirectX 12 R9390-DC2-8GD5 8GB  CMY32GX3M4A2400C11R 
Hard DriveHard DriveOptical DriveCooling
Samsung 500GB Evo MZ-75E500B/AM Seagate  Asus DRW-24B1ST/BLK/B/AS NZXT Kraken X61 RL-KRX61-01 280mm 
CoolingCoolingCoolingCooling
NZXT Kraken X41 RL-KRX41-01 140mm NZXT Kraken G10 NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... 
CoolingCoolingOSMonitor
NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... NF-A14 iPPC-3000 PWM, 140mm PWM,AAO Frame Techn... Windows 7 x64 Pro HP W2207 
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Genius Corsair AX860i Corsair Graphite CC600TWM-WHT  Genius 
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post #57647 of 67332
Quote:
Originally Posted by superstition222 View Post

Has anyone done better than 300ns for tRFC with 16 GB of RAM (2 sticks)?

tRFC depends on IC density, not on the total amount of RAM. For 4Gb ICs 300ns is correct. You may be able to set it to 160ns, but it will most likely decrease the maximum MEMCLK.
post #57648 of 67332
Quote:
Originally Posted by Kalistoval View Post

I cant call it that because of all chips its the only one I have ever had that managed 5Ghz, its the only chip I have ever run prime95 for 24hrs at that clock speed. Would like to see some one else do the same. I primed and also still used my rig to stream movies and shows and run runescape without it crashing, and I'm not talking 10 mins off and on I did that stuff for hours.

nice wish i had my watercooling hooked up but our lass wont let me lol

if all u do is game and stream movies u would get away wih dropping that vcore down a bit
My Rig
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FX-8370 asus sabertooth 990fx R9 290 DC2 kingston hyper x beast 1866 
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My Rig
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FX-8370 asus sabertooth 990fx R9 290 DC2 kingston hyper x beast 1866 
CoolingOSMonitorKeyboard
fractal design kelvin s36 windows 10 pro Acer G245HQ Saitek Cyborg V5 
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post #57649 of 67332
Quote:
Originally Posted by Kalistoval View Post

IMO that cpu/nb voltage is really high, I feel its working against you at this point try 1.20 - 1.225v

So I think you've got the right idea. I dropped my CPU-NB back to 1.2v and I managed to pass 4.7GHz. Currently running 4.8 but it isn't stable at 1.524v under load as I'm getting -1 results in IBT but it's still completing, it hasn't errored out yet. Posting this from my phone but ill get the screenshots up soon, ill edit this post with them.

edit:

Ok so this was my first attempt at 4.7GHz and you can see that 1.5v under load for the CPU and 1.263v for the CPU-NB was unstable.
First try at 4.7GHz (Click to show)

Then we have my fourth attempt where I've increased the voltage to 1.524v under load and the CPU-NB is still at 1.263v and looking at my CPU-NB voltage graph in the bottom left corner that it was dipping to 1.175v fairly frequently.
Fourth try at 4.7GHz (Click to show)

Now I tried dropping my CPU-NB voltage back down to 1.2v in the BIOS like Kalistoval suggested and here we have a success. 1.524v under load for the CPU and 1.20v under load for the CPU-NB with a much more consistent voltage. The only things I changed between my first attempt and my sixth passing attempt was increasing the CPU voltage and lowering the CPU-NB voltage.
Sixth try at 4.7GHz, success! (Click to show)

And heres the first attempt at 4.8GHz which semi-passed I guess according to IBT?
Fake-pass 4.8GHz (Click to show)

Edited by deehoC - 1/25/16 at 11:54am
post #57650 of 67332
Quote:
Originally Posted by deehoC View Post

So I think you've got the right idea. I dropped my CPU-NB back to 1.2v and I managed to pass 4.7GHz. Currently running 4.8 but it isn't stable at 1.524v under load as I'm getting -1 results in IBT but it's still completing, it hasn't errored out yet. Posting this from my phone but ill get the screenshots up soon, ill edit this post with them.

That's marginally stable. You can do less critical stuff on that. And maybe a couple of bumps on the core will stabilize it.
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