Associate
- Joined
- 2 Feb 2006
- Posts
- 375
- Location
- Chepstow, Wales
Hi,
I decided to get the Athlon X2 5200+ and the GEIL PC2 6400 2 gig kit.
Then I found this info on another website.
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"The problem is when the CPU clock multiplier is an odd number. For an AM2 CPU with a clock multiplier of 13x, theoretically its memory bus divider would be of 6.5. Since the AMD64 memory bus doesn’t work with “broken” dividers, it is rounded up to the next higher number, seven in this case. So while this CPU will work at 2.6 GHz (200 MHz x 13), its memory bus will work at 371 MHz (742 MHz DDR) and not at 400 MHz (800 MHz DDR), making the CPU to not achieve the maximum bandwidth the DDR2 memory can provide.
This is the case of Athlon 64 X2 5000+. As it works internally at 2.6 GHz multiplying its HTT clock by 13x, it can access memory only up to 742 MHz and not 800 MHz.
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So would I have gained by getting the X2 5600+ that uses memory at 800 MHz or not?
Thanks.
I decided to get the Athlon X2 5200+ and the GEIL PC2 6400 2 gig kit.
Then I found this info on another website.
-------------------------------------------------------------------
"The problem is when the CPU clock multiplier is an odd number. For an AM2 CPU with a clock multiplier of 13x, theoretically its memory bus divider would be of 6.5. Since the AMD64 memory bus doesn’t work with “broken” dividers, it is rounded up to the next higher number, seven in this case. So while this CPU will work at 2.6 GHz (200 MHz x 13), its memory bus will work at 371 MHz (742 MHz DDR) and not at 400 MHz (800 MHz DDR), making the CPU to not achieve the maximum bandwidth the DDR2 memory can provide.
This is the case of Athlon 64 X2 5000+. As it works internally at 2.6 GHz multiplying its HTT clock by 13x, it can access memory only up to 742 MHz and not 800 MHz.
-----------------------------------------------------------------
So would I have gained by getting the X2 5600+ that uses memory at 800 MHz or not?
Thanks.
