SandyBridge I5-2500K OverClocked 4.5GHz Questions Help!
Hi, this is my first time overclocking and I did a whole lot of research before trying it. There is a lot of information out there about overclocking and many areas are somewhat confusing for me so I hope experts here could give me there advice on my overclocking; Thank you in advance for your help!
CPU: Intel core I5 2500K Sandy Bridge (OCing now!)
HSF: Cooler Master Hyper 212 Plus (Artic silver 5)
MOBO: ASRock P67 EXTREME4 (B3) LGA 1155 Intel
GPU: EVGA GeForce SC GTX 460 (will SLI later)
RAM: CORSAIR Vengeance 8GB DDR3 1600 (Maybe OC later)
SSD: Kingston SSDNow V+100 SVP100S2/96G (Tweaked)
HDD: Seagate Barracuda ST31000524AS 1TB 7200RPM SATA 6GB
OD: LITE-ON CD/DVD Burner - iHAS124-04
PSU: Corsair Enthusiast Series TX750 v2 750-Watt 80 Plus Bronze Certified
CASE: LIAN LI Lancool PC-K63 Black Steel ATX Mid Tower
OS: Window 7 Professional
1st Question: First I would like to ask, what is a stable Vcore 24/7 Overclocked PC with I5-2500K SandyBridge CPU? I tried looking for the answer, but most of what I found was too old (in Jan.) and a large mix of 3.5v – 5.2v 24/7 stability.
2nd Question: I read somewhere that when OCing my CPU the turbo boost function will automatically shut down or disable itself, is that true?
3rd Question: I am trying to OC my CPU to 4.5GHz and have my Turbo boost set on default and short Duration Power limit: 210 and Long duration power limit: 200 with auto voltage. My question is do I need to manually set these settings or leave it at automatic? If I have to set it are those numbers ok? I use an educated guess for those numbers by comparing them with others; I really do not know much about these settings. (I know question 3 is really multiple part questions )
4th Question: Is the offset adding or subtracting from the VID? And if not what is it offsetting?
5th Question: Does Internal PLL Overvoltage need to be enabled for OCing? I researched it online and found mix answers with some having them on and some having them off. I read that having it on is helpful with voltage stability when OCing extremely high (4.7 and above). So I am OCing to 4.5 right now with PLL overvoltage disable and it seems fine, but with it on does it make it better?
I am able to run Prime95 for 1hr 15 minutes without issues with the following settings (please let me know what you think about my setting and how I may improve it):
UEFI version P67 Extreme P1.60
Load Optimized CPU OC settings: Default
CPU Max Ratio: 45
Internal PLL Overvoltage: Disable
Turbo Boost Power Limit: Manual
SDPL: 220
LDPL: 200
Additional Turbo Voltage: Auto
Core Current Limit: 200
Spread Spectrum: Disabled
Power Saving Mode: Disabled
CPU Core Voltage: fluctuate between 1.248v – 1.256v
Offset Voltage: -0.055v
LLC: Level 3 (there are 5 levels [1-5])
Prime95 Load: vcore fluctuate between 1.264v and 1.272v
IDLE: fluctuate between 0.928v – 1.064v
6th Question: is this consider stable, I mean is it normal for the vcore to fluctuate?
Change LLC to Level 1 Prime95 Test
Next I reboot to UEFI and change my LLC level to “1” (I read somewhere that the lower the LLC the better). The change in LLC crashed within 15 minutes of running Prime95. Vcore on load fluctuate between 1.312v, 1.320, and 1.328 before BSOD.
7th Question: With LLC is it better to have a lower (level 1) than having it at higher (level 5)?
Change back to previous stable Overclocked settle with LLC lev. 3
8th Question: Now I change back the LLC to level 3 and ran Prime95 again and the core voltage has change since last time. Now it is running at 1.272v and 1.280, is that normal for it to have different core voltage under load with the same settings?
Below are my current stable Overclocked 4.5GHz CPU UEFI screen shots, CPU-Z, Speedfan, etcetera:
Any Advice in addition to my question are welcome and appreciated, Thank you!
Hi, this is my first time overclocking and I did a whole lot of research before trying it. There is a lot of information out there about overclocking and many areas are somewhat confusing for me so I hope experts here could give me there advice on my overclocking; Thank you in advance for your help!
CPU: Intel core I5 2500K Sandy Bridge (OCing now!)
HSF: Cooler Master Hyper 212 Plus (Artic silver 5)
MOBO: ASRock P67 EXTREME4 (B3) LGA 1155 Intel
GPU: EVGA GeForce SC GTX 460 (will SLI later)
RAM: CORSAIR Vengeance 8GB DDR3 1600 (Maybe OC later)
SSD: Kingston SSDNow V+100 SVP100S2/96G (Tweaked)
HDD: Seagate Barracuda ST31000524AS 1TB 7200RPM SATA 6GB
OD: LITE-ON CD/DVD Burner - iHAS124-04
PSU: Corsair Enthusiast Series TX750 v2 750-Watt 80 Plus Bronze Certified
CASE: LIAN LI Lancool PC-K63 Black Steel ATX Mid Tower
OS: Window 7 Professional
1st Question: First I would like to ask, what is a stable Vcore 24/7 Overclocked PC with I5-2500K SandyBridge CPU? I tried looking for the answer, but most of what I found was too old (in Jan.) and a large mix of 3.5v – 5.2v 24/7 stability.
2nd Question: I read somewhere that when OCing my CPU the turbo boost function will automatically shut down or disable itself, is that true?
3rd Question: I am trying to OC my CPU to 4.5GHz and have my Turbo boost set on default and short Duration Power limit: 210 and Long duration power limit: 200 with auto voltage. My question is do I need to manually set these settings or leave it at automatic? If I have to set it are those numbers ok? I use an educated guess for those numbers by comparing them with others; I really do not know much about these settings. (I know question 3 is really multiple part questions )
4th Question: Is the offset adding or subtracting from the VID? And if not what is it offsetting?
5th Question: Does Internal PLL Overvoltage need to be enabled for OCing? I researched it online and found mix answers with some having them on and some having them off. I read that having it on is helpful with voltage stability when OCing extremely high (4.7 and above). So I am OCing to 4.5 right now with PLL overvoltage disable and it seems fine, but with it on does it make it better?
I am able to run Prime95 for 1hr 15 minutes without issues with the following settings (please let me know what you think about my setting and how I may improve it):
UEFI version P67 Extreme P1.60
Load Optimized CPU OC settings: Default
CPU Max Ratio: 45
Internal PLL Overvoltage: Disable
Turbo Boost Power Limit: Manual
SDPL: 220
LDPL: 200
Additional Turbo Voltage: Auto
Core Current Limit: 200
Spread Spectrum: Disabled
Power Saving Mode: Disabled
CPU Core Voltage: fluctuate between 1.248v – 1.256v
Offset Voltage: -0.055v
LLC: Level 3 (there are 5 levels [1-5])
Prime95 Load: vcore fluctuate between 1.264v and 1.272v
IDLE: fluctuate between 0.928v – 1.064v
6th Question: is this consider stable, I mean is it normal for the vcore to fluctuate?
Change LLC to Level 1 Prime95 Test
Next I reboot to UEFI and change my LLC level to “1” (I read somewhere that the lower the LLC the better). The change in LLC crashed within 15 minutes of running Prime95. Vcore on load fluctuate between 1.312v, 1.320, and 1.328 before BSOD.
7th Question: With LLC is it better to have a lower (level 1) than having it at higher (level 5)?
Change back to previous stable Overclocked settle with LLC lev. 3
8th Question: Now I change back the LLC to level 3 and ran Prime95 again and the core voltage has change since last time. Now it is running at 1.272v and 1.280, is that normal for it to have different core voltage under load with the same settings?
Below are my current stable Overclocked 4.5GHz CPU UEFI screen shots, CPU-Z, Speedfan, etcetera:
Any Advice in addition to my question are welcome and appreciated, Thank you!