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Old 03-01-09   #1 (permalink)
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Default CPU limitation? Limited DIMM per channel?
I was checking out the ASUS M4A78 PRO mobo and this is what the spec says for memory.

"(Due to AMD CPU limitation, DDR2 1066 is supported by AM2+/AM3 CPU for one DIMM per channel only)"

What does this exactly mean?
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Old 03-01-09   #2 (permalink)
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There is 2 channels on your motherboard, meaning that if you don't have a AM2+/AM3 processor, you can only put a single DDR2 1066 in a single channel, so you can have a max of two DDR2 1066s per slot. But if you have an AM2+/AM3 Processor, it shouldn't matter. You can tell the difference between the channels by the different color. Each channel is composed of 2 RAM sticks.

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Old 03-01-09   #3 (permalink)
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Gotcha, thanks!
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No, for the same reason you don't clean your computer parts with your dishes.
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Old 03-01-09   #4 (permalink)
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it means that you will have difficulty running 1066 x 4 ram slots. you need an AM2+ cpu to run 1066mhz memory natively. meaning that you can either run 2 x 1gb 1066 or 2 x 2gb 1066mhz memory.
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Old 03-02-09   #5 (permalink)
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No problem
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Old 03-28-09   #6 (permalink)
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Default will this work
with the amd prosesor limitations can i place ram as follows

chanel 1
slot 1 ddr2 2g 1066
slot 2 ddr2 2g 800

chanel 2
slot 3 ddr2 2g 1066
slot 4 ddr2 2g 800
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Old 03-28-09   #7 (permalink)
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Quote:
Originally Posted by beer-fish View Post
with the amd prosesor limitations can i place ram as follows

chanel 1
slot 1 ddr2 2g 1066
slot 2 ddr2 2g 800

chanel 2
slot 3 ddr2 2g 1066
slot 4 ddr2 2g 800
You could, but it would be a waste really as the 1066's would downclock to 800

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Old 03-28-09   #8 (permalink)
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so then if i want 8g with any at 1066 i need to shell out the bucks for 2 4g
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Old 03-28-09   #9 (permalink)
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Quote:
Originally Posted by beer-fish View Post
so then if i want 8g with any at 1066 i need to shell out the bucks for 2 4g
If they support it, yes. But I'm quite sure they don't.
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Old 03-28-09   #10 (permalink)
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i have X4 940 3.0GHz on a ASUS M4A79 Deluxe ATX AMD Motherboard
it supoorts it 1066 but only one dimm per chanel
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