cancel
Showing results for 
Search instead for 
Did you mean: 

RIVBE LLC & CPU Current Capability

Ramb0bear
Level 7
Hello everyone,
recently i've overclocked my 4820k @4.5ghz using offset mode and i'm using BIOS ver 0701
i have 2 bios settings that stable 14 hours of prime95 and 20 pass of IBT blend 14Gb RAM.

1st
Offset: +0.040 (CPU voltage max 1.248, min 1.232, 1.248 @ 100% load)
CPU Load Line Calibration: High
CPU Current Capability:120%
CPU Power Phase: Optimized

2nd
Offset: +0.075 (CPU voltage max 1.296, min 1.248, 1.264-1.280 @ 100% load)
CPU Load Line Calibration: Medium
CPU Current Capability:130% (OCP Tripped at 120% when stress testing, current inrush inertia didn't help)
CPU Power Phase:Extreme (greyed and cannot be changed without dropping CPU Current Capability to 120%)

my questions are:
1. Why board's OCP tripped when i'm using medium LLC and 120% CPU Current Capability but fully stable when i'm using high LLC? is it normal?
I think medium LLC should have a lower voltage spike that couldn't tripped the OCP
2. Did BIOS 0701 change the CPU Current Capability default level from 140% to 160% when using auto?

i know 140% CPU Current Capability is recommended for overclocked system but i like to lower it down to ease my mind.

ps: sorry for a long post and bad english 😞
Hardware Spec:
CPU: i7-4820K @ 4.5Ghz
CPU Cooler: Corsair H100
Motherboard: Rampage IV Black Editon
RAM: Corsair Dominator Platinum CMD16GX3M4A1866C9
PSU: Seasonic Platinum 1000w
GPU1: EVGA GTX 680 SC
GPU2: ASUS GTX 680 DC2 OC
Harddisk: WD Caviar Black 500GB & 1TB
Case: Cooler Master HAF-X
4,888 Views
5 REPLIES 5

Raja
Level 13
Don't worry about current capability "for peace of mind" - use whatever is needed to stop the system resetting under load.

Ramb0bear
Level 7
@ Raja Thank you for your fast response.
but do you have explanation about the CPU Current Capability behavior that trip at medium LLC but stable at high LLC? :confused:
Hardware Spec:
CPU: i7-4820K @ 4.5Ghz
CPU Cooler: Corsair H100
Motherboard: Rampage IV Black Editon
RAM: Corsair Dominator Platinum CMD16GX3M4A1866C9
PSU: Seasonic Platinum 1000w
GPU1: EVGA GTX 680 SC
GPU2: ASUS GTX 680 DC2 OC
Harddisk: WD Caviar Black 500GB & 1TB
Case: Cooler Master HAF-X

If you want to run Optimized Phase Control at a higher CPU Current Capability setting, you can either:

A) Set CPU-CC to "Auto", which allows to you select Optimized, all in the BIOS
B) Manually override the PC Extreme setting with the AI Suite software once it's booted into Windows

Myself, I have settled on option A because I prefer to have everything configured through the BIOS. I mainly wanted to run the Optimized for power savings, but to be honest, I haven't been able to detect much (if any) difference between Optimized vs Extreme phase modes. Could be on the order of ~5W max. If I need to go back to Extreme for whatever reason, I won't worry about it. Heck, what's the point of all those phase modes if they go unused?
Rampage IV Black Edition | 4960X 4.5 GHz x6 @ ~1.232V | 64 GB 2133 1.5V @ Stock XMP
2x Crossfire Matrix Platinum 7970s @ Stock | AX1200i | H100i | Corsair Link Commander
1 TB EVO | 3 TB WD Red | CoolerMaster Cosmos II

Ramb0bear wrote:
@ Raja Thank you for your fast response.
but do you have explanation about the CPU Current Capability behavior that trip at medium LLC but stable at high LLC? :confused:


Because the voltage sensing option maybe changing with it in the background. Just use the OCP you need for your system.

Ramb0bear
Level 7
I get it now. Thank you for all your response and input, i really appreciate it. 😄
Hardware Spec:
CPU: i7-4820K @ 4.5Ghz
CPU Cooler: Corsair H100
Motherboard: Rampage IV Black Editon
RAM: Corsair Dominator Platinum CMD16GX3M4A1866C9
PSU: Seasonic Platinum 1000w
GPU1: EVGA GTX 680 SC
GPU2: ASUS GTX 680 DC2 OC
Harddisk: WD Caviar Black 500GB & 1TB
Case: Cooler Master HAF-X