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Unlinking RAM from the FSB?

post #1 of 12
Thread Starter 
Possible on an AMD chip?
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post #2 of 12
I think it depends on the motherboard. I have a Gigabyte board too and I can not unlink my RAM and FSB.
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post #3 of 12
Thread Starter 
yeah, annoying but not gonna lose sleep over it.
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post #4 of 12
Due to the memory controller being integrated with the CPU, they can't be unlinked. The best you can do is play with the memory divider.
post #5 of 12
As far as I know, you can only do this on an Nvidia chipset for Intel (680i, 780i, etc). All other chipsets use dividers.
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post #6 of 12
Ii could unlink the two on my old ASUS P5ND2-SLI board. I don't think it had an nvidia chipset. But it's all in the mobo
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post #7 of 12
Quote:
Originally Posted by se7en56 View Post
Ii could unlink the two on my old ASUS P5ND2-SLI board. I don't think it had an nvidia chipset. But it's all in the mobo
If it's an SLI board, it's an Nvidia chipset. Or at least partially (in the case of the Skulltrail). The P5ND2-SLI uses the Nforce4 SLI chipset.
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post #8 of 12
Ah, thats right good catch. I forgot it was an Nforce
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post #9 of 12
Not possible on an AMD cpu.
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post #10 of 12
AMD chips (modern ones anyway), don't have an FSB, as you know it.

With an A64, Phenom, or Opteron, memory can only be run at whole number dividers of the full CPU speed (usually the speed of the memory controler). Most BIOSes limit this further, to numbers that match standard memory ratios as closely as possible.

Quote:
Originally Posted by korosu View Post
As far as I know, you can only do this on an Nvidia chipset for Intel (680i, 780i, etc). All other chipsets use dividers.
Even the NVIDIA chipsets for Intel use dividers. They just have access to so many of them that it gives the illusion of being able to pick your exact memory speed.

You can check this with something that reads memory speed and/or dividers. You won't always be at exactly the speed you select.
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