- Joined
- Sep 21, 2010
Hey guys, the rig I'm currently working with is;
Asus Crosshair Formula IV
AMD FX-4170
Corsair H70
8GB OCZ Reaper HPC 1600 @ 1.9v (4x2GB)
MSI HD5970
Cooler Master Silent Pro Gold 1000W
Cooler Master HAF X
First things first, the motherboard is using a beta BIOS (v3027) in order to support the bulldozer CPU. With this beta there are a number of options missing from the BIOS.
From the manual;
3.3.10 CPU & NB Voltage Mode [Offset]
Allows you to set the CPU & CPU/NB Voltage Mode. Different sub-items appear according to the CPU & NB Voltage Mode item setting. Configuration options: [Offset] [Manual]
CPU Offset Voltage [Auto]
This item appears only when you set the CPU & NB Voltage Mode item to [Offset] and allows you to set the CPU Offset voltage. The values range from 0.006250V to 0.700000V with a 0.006250V interval.CPU/NB Offset Voltage [Auto]
This item appears only when you set the CPU & NB Voltage Mode item to [Offset] and allows you to set the CPU/NB Offset voltage. The values range from 0.006250V to 0.700000V with a 0.006250V interval.
CPU Voltage [Auto]
This item appears only when you set the CPU & NB Voltage Mode item to
[Manual] and allows you to set a fixed CPU voltage.
CPU/NB Voltage [Auto]
This item appears only when you set the CPU & NB Voltage Mode item to
[Manual] and allows you to set a fixed CPU/NB voltage.
Currently the "CPU & NB Voltage Mode" option is missing, which in turn means the CPU and CPU/NB Voltage options are missing, thus means the only way I can set CPU voltage is via the "CPU Offset Voltage" which I'll be honest, I don't fully understand.
I have disabled cool and quiet, turbo core, ai tweaker, etc and set everything to manual.
With the following settings I've achieved a stable 4.8GHz;
CPU Multiplier: 24
HT: 2600
CPU/NB: 2600
CPU Offset Voltage: 0.100000
NB Voltage: 1.175
HT Voltage: 1.275
Prime95 runs for a couple of hours without any dropped workers and gaming seems perfectly stable but I have a few oddities;
1) The machine boots at 1.5v VCORE, but then drops to 1.488v according to HWMonitor and CPU-Z. When stress testing it increases to 1.52 which brings the full load temps up to around 56C, I don't seem to be able to fix the voltage.
2) When trying to run 5GHz (25x200) it seems the above fluctuations cause the Prime95 worker processors to fail or the machine to blue screen.
3) Despite the NB voltage being set at 1.175 the board appears to allow it to run up to 1.25 according to its own voltage monitor and also HWMonitor.
I would love to hear if anyone else has this motherboard with a Bulldozer CPU or any advice on how to proceed from here.
Thanks
Asus Crosshair Formula IV
AMD FX-4170
Corsair H70
8GB OCZ Reaper HPC 1600 @ 1.9v (4x2GB)
MSI HD5970
Cooler Master Silent Pro Gold 1000W
Cooler Master HAF X
First things first, the motherboard is using a beta BIOS (v3027) in order to support the bulldozer CPU. With this beta there are a number of options missing from the BIOS.
From the manual;
3.3.10 CPU & NB Voltage Mode [Offset]
Allows you to set the CPU & CPU/NB Voltage Mode. Different sub-items appear according to the CPU & NB Voltage Mode item setting. Configuration options: [Offset] [Manual]
CPU Offset Voltage [Auto]
This item appears only when you set the CPU & NB Voltage Mode item to [Offset] and allows you to set the CPU Offset voltage. The values range from 0.006250V to 0.700000V with a 0.006250V interval.CPU/NB Offset Voltage [Auto]
This item appears only when you set the CPU & NB Voltage Mode item to [Offset] and allows you to set the CPU/NB Offset voltage. The values range from 0.006250V to 0.700000V with a 0.006250V interval.
CPU Voltage [Auto]
This item appears only when you set the CPU & NB Voltage Mode item to
[Manual] and allows you to set a fixed CPU voltage.
CPU/NB Voltage [Auto]
This item appears only when you set the CPU & NB Voltage Mode item to
[Manual] and allows you to set a fixed CPU/NB voltage.
Currently the "CPU & NB Voltage Mode" option is missing, which in turn means the CPU and CPU/NB Voltage options are missing, thus means the only way I can set CPU voltage is via the "CPU Offset Voltage" which I'll be honest, I don't fully understand.
I have disabled cool and quiet, turbo core, ai tweaker, etc and set everything to manual.
With the following settings I've achieved a stable 4.8GHz;
CPU Multiplier: 24
HT: 2600
CPU/NB: 2600
CPU Offset Voltage: 0.100000
NB Voltage: 1.175
HT Voltage: 1.275
Prime95 runs for a couple of hours without any dropped workers and gaming seems perfectly stable but I have a few oddities;
1) The machine boots at 1.5v VCORE, but then drops to 1.488v according to HWMonitor and CPU-Z. When stress testing it increases to 1.52 which brings the full load temps up to around 56C, I don't seem to be able to fix the voltage.
2) When trying to run 5GHz (25x200) it seems the above fluctuations cause the Prime95 worker processors to fail or the machine to blue screen.
3) Despite the NB voltage being set at 1.175 the board appears to allow it to run up to 1.25 according to its own voltage monitor and also HWMonitor.
I would love to hear if anyone else has this motherboard with a Bulldozer CPU or any advice on how to proceed from here.
Thanks