I've done the whole support ticket with XFX, and frankly, most of the tech support people know less than I do.
XFX 790i Ultra SLI
Core 2 Quad Q6700
600 Watt PSU
Any other info, read my sig.
Anyhow I had this motherboard for sometime now. However, I think there is has been something wrong with my overclocking for sometime now. I have the Intel Core 2 Quad Q6700 processor on my XFX 790i Ultra SLI mobo. The stock speeds for the processor are as followed:
Operating Frequency: 2.66GHz
FSB: 1066MHz
Multiplier: x10
Voltage: 0.85V – 1.5V
Thermal Design Power: 95W
Currently, my overclocking settings are as followed:
Operating Frequency: 3.50MHz
FSB: 1400MHz
Multiplier: x10
VCore: 1.450v
FSB: 1.450v
SPP: Auto (1.450v)
MCP: 1.500v
Memory: 2.000v
Power Supply Unit: 600W
XFX 790i Ultra SLI BIOS: P09
For my current stable temperatures are as followed:
Processor
CPU: 37C
CPU1: 27C
CPU2: 26C
CPU3: 34C
CPU4: 38C
Video Card
GPU: 50C
Motherboard
System Temp: 32C
MCP Temp: 57C
Disk
Disk1 Temp: 33C
Disk2 Temp: 31C
I have absolutely no temperature problems. I have a custom built water cooling setup for the cooling system for just the CPU. Everything else is stock, with the exception of 5 case fans and 1 RAM cooler.
For the longest time I just thought that was the max for this processor. However, after doing some research online, I've found many people being able to achieve higher FSB speeds with this processor.
I've been wanting to overclock my FSB to around 400MHz. I've tried lowering the CPU Multiplier to 8 and 9, tried different voltage for the VCore, FSB, and SPP at or around my current stable configuration.
I've read about something called an FSB hole? It has to do with motherboards unable to run stable FSB over 350MHz. If this is the case, is my motherboard flawed? I have the most recent BIOS update, P09.
I will be buying the Intel Core 2 Quad Q9550S within a couple of weeks. The Thermal Design Power for this chip is 65W. Now that will be a 30W difference. I'd really hate to buy this new processor and then find out that I have the same exact problem, unable to achieve a FSB between 400-500MHz. Any help would be great.
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