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Is my 2500K just a dog? - Page 2

post #11 of 33
Quote:
Originally Posted by Falkentyne View Post
What the heck is PPL overvoltage?
Do you mean PLL overvoltage? or is PPL something new?
Yes PLL, typos are the devil
post #12 of 33
Thread Starter 
Quote:
Originally Posted by compudaze View Post
is 1.31 the voltage when under load running prime?
Yes, that's the voltage when running under prime/IBT. It fluctuates between 1.316 and 1.324, usually stays at 1.316 though.

Tried a few different settings (enabling C3+C6 states). Enabled that "internal PLL overvoltage". No change.

What does taht Internal PLL voltage thing do anyways? I cna jsut manually raise the PLL if necessary.

I think the chip I got is just a slug.

/sadface
2500K 4/1/2011
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2500K 4/1/2011
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post #13 of 33
My 2500k requires 1.44 at 4.6 to be stable during avx linpack

4.5 is 1.404

4.4 is 1.368


I know I dont have a great chip, but I dont think its as bad as it seems cause most people post unstable voltage and speeds.
post #14 of 33
Quote:
Originally Posted by canna View Post
Yes, that's the voltage when running under prime/IBT. It fluctuates between 1.316 and 1.324, usually stays at 1.316 though.

Tried a few different settings (enabling C3+C6 states). Enabled that "internal PLL overvoltage". No change.

What does taht Internal PLL voltage thing do anyways? I cna jsut manually raise the PLL if necessary.

I think the chip I got is just a slug.

/sadface
That's not terrible. For 12H prime blend... 4.8GHz 1.375V, 4.7GHz 1.345v. Still working on 4.6GHz, failed at 1.305V. On a 2600K though.

PLL overvoltage is supposed to allow you to use higher multipliers you normally wouldn't be able to boot at.

I can boot up to 51x with it disabled. At 52-56x I _HAVE_ to enable it to even get past POST.

On my old gigabyte board I was 12H prime blend stable at 4.8GHz with PLL overvoltage disabled. Once I enabled it, the system crashed on windows loading screen.

On my new asus board I was 12H prime blend stable at 4.8GHz with PLL overvoltage enabled. Once I disabled it, the system still booted, but failed prime blend after 15m.

I'm still on the fence about it. Best thing to do it try it out both ways and see which works best for you.
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Scorpion
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post #15 of 33
Thread Starter 
Quote:
Originally Posted by compudaze View Post
That's not terrible. For 12H prime blend... 4.8GHz 1.375V, 4.7GHz 1.345v. Still working on 4.6GHz, failed at 1.305V. On a 2600K though.

PLL overvoltage is supposed to allow you to use higher multipliers you normally wouldn't be able to boot at.

I can boot up to 51x with it disabled. At 52-56x I _HAVE_ to enable it to even get past POST.

On my old gigabyte board I was 12H prime blend stable at 4.8GHz with PLL overvoltage disabled. Once I enabled it, the system crashed on windows loading screen.

On my new asus board I was 12H prime blend stable at 4.8GHz with PLL overvoltage enabled. Once I disabled it, the system still booted, but failed prime blend after 15m.

I'm still on the fence about it. Best thing to do it try it out both ways and see which works best for you.
Auto PLL overvolt doesn't seem to do anything for me.

It's really weird though

4.5 GHz Requires 1.360v is relatively stable, 25 IBT runs, and ~3hours prime (I stopped at that point). However, it won't even boot windows at 1.355, bluescreens with stop code 0x9C.


Side question, with C1 enabled, at 1.6 GHz downclock, my core voltage drops to 0.88v. I read somewhere you're supposed to keep your core voltage within 0.5V of the DRAM voltage or else you could possibly have long term CPU damage. Any info on this? I thought that was the VTT voltage that needed to be within 0.5V, not the VCC voltage.
2500K 4/1/2011
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2500K 4/1/2011
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post #16 of 33
Try using manual voltage instead of offset voltage.
Scorpion
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Scorpion
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post #17 of 33
Quote:
Originally Posted by canna View Post
Auto PLL overvolt doesn't seem to do anything for me.
Auto usually for that settings usually means disabled by default. You would need to manually enable it.
Scorpion
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Scorpion
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post #18 of 33
Thread Starter 
Quote:
Originally Posted by compudaze View Post
Try using manual voltage instead of offset voltage.
I got some better results with that. Must be the voltage swings or whatever causing instability (just a guess). I set a manual vCore then adjusted the turbo offset (not global offset) up to keep it at that vCore under load, I guess kinda simulating LLC, since my board doesn't have LLC in manual mode.

4.6GHz @ 1.355 vCore, stable for 20 IBT and ~2hours prime, stopped there.

4.3GHz @ 1.248 vCore, one prime thread crashed after a bit over an hour, raised vCore one notch, testing again overnight. This looks like a winner 24/7 OC if it's stable.

Only downside is my chip vCore doesn't adjust itself down when its under turbo multiplier, it just sits at the manual vCore full time.

Thanks for all the help so far to everyone who has posted here.
2500K 4/1/2011
(13 items)
 
  
CPUMotherboardGraphicsRAM
I5 2500K @ 4.4GHz 1.320vCore AsRock P67 Pro3 (B3) Gigabyte R280X Windforce Rev2 4x4GB Gskill DDR3-1600 
Hard DriveOptical DriveOSMonitor
120G Samsung 830 SSD, 3x2TB Samsung 5.4K, 1x2TB... Lite on DVDRW Win 7 64 2 x Asus 24" LED LCD 
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2500K 4/1/2011
(13 items)
 
  
CPUMotherboardGraphicsRAM
I5 2500K @ 4.4GHz 1.320vCore AsRock P67 Pro3 (B3) Gigabyte R280X Windforce Rev2 4x4GB Gskill DDR3-1600 
Hard DriveOptical DriveOSMonitor
120G Samsung 830 SSD, 3x2TB Samsung 5.4K, 1x2TB... Lite on DVDRW Win 7 64 2 x Asus 24" LED LCD 
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post #19 of 33
Thread Starter 
Quote:
Originally Posted by compudaze View Post
Auto usually for that settings usually means disabled by default. You would need to manually enable it.
My board only has Auto and Disabled.
2500K 4/1/2011
(13 items)
 
  
CPUMotherboardGraphicsRAM
I5 2500K @ 4.4GHz 1.320vCore AsRock P67 Pro3 (B3) Gigabyte R280X Windforce Rev2 4x4GB Gskill DDR3-1600 
Hard DriveOptical DriveOSMonitor
120G Samsung 830 SSD, 3x2TB Samsung 5.4K, 1x2TB... Lite on DVDRW Win 7 64 2 x Asus 24" LED LCD 
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Generic Corsair TX 650 V2 HAF 922 Logitech LX7 
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Nada 
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2500K 4/1/2011
(13 items)
 
  
CPUMotherboardGraphicsRAM
I5 2500K @ 4.4GHz 1.320vCore AsRock P67 Pro3 (B3) Gigabyte R280X Windforce Rev2 4x4GB Gskill DDR3-1600 
Hard DriveOptical DriveOSMonitor
120G Samsung 830 SSD, 3x2TB Samsung 5.4K, 1x2TB... Lite on DVDRW Win 7 64 2 x Asus 24" LED LCD 
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Generic Corsair TX 650 V2 HAF 922 Logitech LX7 
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post #20 of 33
Quote:
Originally Posted by canna View Post
Only downside is my chip vCore doesn't adjust itself down when its under turbo multiplier, it just sits at the manual vCore full time.
I observed a minor idle wattage increase from switching from offset to manual voltage as a result. Not enough for me even mention.
Scorpion
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 2500K Gigabyte GA-Z68X-UD3H-B3 MSI GeForce GTX 580 Lightning Corsair Vengeance 8GB DDR3-1600 CL9 
Hard DriveOptical DriveOSMonitor
OCZ Agility 2 120GB Samsung SH-S223L DVD-RW Windows 7 Professional 64-Bit AOC e2243Fwk 21.5" LED 
KeyboardPowerCaseMouse
XArmor U9 Mechanical Corsair HX850 Corsair Carbide Series 500R Logitech G500 
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Nova Gaming Winner 3 Realtek ALC889 Codec 
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Scorpion
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 2500K Gigabyte GA-Z68X-UD3H-B3 MSI GeForce GTX 580 Lightning Corsair Vengeance 8GB DDR3-1600 CL9 
Hard DriveOptical DriveOSMonitor
OCZ Agility 2 120GB Samsung SH-S223L DVD-RW Windows 7 Professional 64-Bit AOC e2243Fwk 21.5" LED 
KeyboardPowerCaseMouse
XArmor U9 Mechanical Corsair HX850 Corsair Carbide Series 500R Logitech G500 
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Nova Gaming Winner 3 Realtek ALC889 Codec 
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