How to unlink GPU and RAM from CPU when overclocking?

[djdelarosa25]

When I overclock the CPU way up high (x8, 400 MHz FSB) , I get artifacts all over the place. probably caused by the GPU being overclocked as well. Also, I have to underclock my RAM to accomodate my CPU overclock. I can't seem to find a setting in the BIOS to  lock to PCI Express bus. Please help.

[Guest]

If your using BLCK I don't believe its possible.

[djdelarosa25]

If your using BLCK I don't believe its possible.

 

Um, what is BLCK?

[Lotus]

You can't unlink CPU and memory from the baseclock. You CAN lower the memory multiplier.

 

PCIE lanes weren't tied to the baseclock until Sandy Bridge. Prior to that, they had their own timer. BCLK has never affected GPU clocks to my knowledge.

[Guest]

Um, what is BLCK?

I meant BCLK

[djdelarosa25]

You can't unlink CPU and memory from the baseclock. You CAN lower the memory multiplier.

 

PCIE lanes weren't tied to the baseclock until Sandy Bridge. Prior to that, they had their own timer. BCLK has never affected GPU clocks.

 

My memory is one Kingston 2GB DDR2-800 and one Kingston 1GB DDR2-667. They both run now at 667 because I think that's just the way it works when mixing RAM. In RAM Frequency options, I get Auto, 667 MHz, 800 MHz, 1066 etc. I set it to 667 MHz, but when I run BIOS setup, it shows DDR2-801 and this is what CPU-Z shows.

 

Sorry for being a no0b here.

[-rascal-]

My memory is one Kingston 2GB DDR2-800 and one Kingston 1GB DDR2-667. They both run now at 667 because I think that's just the way it works when mixing RAM. In RAM Frequency options, I get Auto, 667 MHz, 800 MHz, 1066 etc. I set it to 667 MHz, but when I run BIOS setup, it shows DDR2-801 and this is what CPU-Z shows.

 

Sorry for being a no0b here.

 

In the CPU-Z screenshot, your memory is indeed running at 800 MHz.

 

DDR = Double Data Rate.

DDR memory is operate to operate on the falling and rising edge of every clock cycle.

That is why the effective frequency is 2x that of the actual frequency (in your case actual = 400 MHz, effective = 800 MHz)

 

It could be that your DDR2-667 MHz memory stick cannot handle the DDR2-800 overclock -- the DDR2-667 is the weaker of your memory.

Drop the memory multiplier so your RAM is operating at 667 MHz or lower, and see if you still run into problems.

 

As mentioned, the BCLK (Base Clock) is a reference point for a few things for your system -- like your memory, and Rated FSB.

That is one of the disadvantages of overclocking Processors without an unlocked CPU multiplier.

 

The graphics card, and PCI-Express bus, is separate from the BCLK.

Increasing / decreasing the BCLK will NOT affect the graphics card's Core and Memory frequencies.

Think of the graphics card as a "complete" mini-PC inside your PC (since it has it's own power, memory, processing cores, mainboard, etc).

[djdelarosa25]

In the CPU-Z screenshot, your memory is indeed running at 800 MHz.

 

DDR = Double Data Rate.

DDR memory is operate to operate on the falling and rising edge of every clock cycle.

That is why the effective frequency is 2x that of the actual frequency (in your case actual = 400 MHz, effective = 800 MHz)

 

It could be that your DDR2-667 MHz memory stick cannot handle the DDR2-800 overclock -- the DDR2-667 is the weaker of your memory.

Drop the memory multiplier so your RAM is operating at 667 MHz or lower, and see if you still run into problems.

 

As mentioned, the BCLK (Base Clock) is a reference point for a few things for your system -- like your memory, and Rated FSB.

That is one of the disadvantages of overclocking Processors without an unlocked CPU multiplier.

 

The graphics card, and PCI-Express bus, is separate from the BCLK.

Increasing / decreasing the BCLK will NOT affect the graphics card's Core and Memory frequencies.

Think of the graphics card as a "complete" mini-PC inside your PC (since it has it's own power, memory, processing cores, mainboard, etc).

 

BIOS doesn't have a memory multiplier.

[djdelarosa25]

In the CPU-Z screenshot, your memory is indeed running at 800 MHz.

 

DDR = Double Data Rate.

DDR memory is operate to operate on the falling and rising edge of every clock cycle.

That is why the effective frequency is 2x that of the actual frequency (in your case actual = 400 MHz, effective = 800 MHz)

 

It could be that your DDR2-667 MHz memory stick cannot handle the DDR2-800 overclock -- the DDR2-667 is the weaker of your memory.

Drop the memory multiplier so your RAM is operating at 667 MHz or lower, and see if you still run into problems.

 

As mentioned, the BCLK (Base Clock) is a reference point for a few things for your system -- like your memory, and Rated FSB.

That is one of the disadvantages of overclocking Processors without an unlocked CPU multiplier.

 

The graphics card, and PCI-Express bus, is separate from the BCLK.

Increasing / decreasing the BCLK will NOT affect the graphics card's Core and Memory frequencies.

Think of the graphics card as a "complete" mini-PC inside your PC (since it has it's own power, memory, processing cores, mainboard, etc).

 

Thing's stable now. It really was the GPU. Reduced my GPU Overclock and now it's running fine.

[djdelarosa25]

Should I go for max multiplier then work the fsb until it reaches the max possible speed without crashing? or should I put the multiplier at a lower number. CPU can only take a few more MHz before crashing (until 3.1 GHz only, I think)