mikeymike wrote:I'm doing a bit of reading up, mostly as a result of my last thread about 'e' AM3 processors. On wikipedia and bit-tech.net, it says that the memory controller can handle a maximum memory speed of DDR3-1333, is this correct? If so, what's the point in, for example with the board I typically use for system builds, (ASUS M4A78T-E) saying it can do DDR3-1600? Can the memory controller be overclocked? Is Asus just doing a bit of potential future-proofing, in case AMD produces an AM3 chip with a better memory controller?
That's a really good question
Mikey...
To be honest most good boards have problems with the 1600 Mem divider, it doesn't seem to be so much of a problem with the chips IMC, but more of a problem with Mobo Bios...
Any decent 790/890 board will do 1600 Mem clocks with tight timings, but alot of them don't seem to like the 1600 divider (unless you want to run them @ CL8 )
Set the Mem divider to 1333 and raise the HtRef clock to 240 (resulting in 1600 clocks) and most boards won't have a problem....
There does seem to be a limitation as to what the IMC can handle, but with a good board & Memory that limit is closer to 1800.
Just for reference, here's what my board does with a 1333 divider and and an overclocked HTRef (Stable):
Phenom II's actually seem to like tighter Mem timings, I'm still working on that...
My sticks will do CL6-7-6-18-24 @ 1400 and it seems to be better than 1600 7-8-7-24-33.
But like I said, it's still a work in progress...
Asus Crosshair IV Formula | 1055T X6 | Mushkin 2x2 1600 @ 1.35v | Visontek 4870/512 | Watercooled | Corsair TX750 PSU | Windows 7 64bit | Corsair 800D Obsidian