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DDR3 on Gigabyte P35C-DS3R at DDR3-1540
Bluetooth 16 May 2007

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DDR3 reaches ASync DDR3-1540

Although, some may agree with me that running ASync is not the best way, this might not be what the intel campers think. That is probably the reason they came out with DDR2-800 in the first place.

Imagine, you are running a X6800 (2.93GHz), which is a 266MHz CPU (11x266). Notice that the FSB is 266MHz. If you intend to run your ram in sync, you would be running DDR2-533 memory module.

If you look at most of the BIOS options on P35 or even the 965P, 975X boards, there are options for you to pick the ASync setting you want to run. Most will pick the highest, e.g. DDR2-800 and now DDR2-1066.

While you can run at this settings, your ram is in fact not running in SYNC with your CPU clk. e.g. CPU:RAM = 266:400 for running DDR2-800. When you run it in SYNC, it would be CPU:RAM = 266:266 or 1:1 for DDR2-533.

When we are clear about this, we take a look at DDR3. DDR3 comes in 1066, 1333 and 1600. Now, 1066 would mean that the ram is actually running at 533MHz. To run that in SYNC, your CPU must be overclocked to 533MHz (e.g 6x533 on E6300).

To run DDR3-1333 or DDR3-1600 in SYNC with CPU, your CPU must be able to run at crazy high speeds 666MHz and 800MHz. That is not possible. We can safely say that DDR3 is meant to be run in ASync mode.

In the next page, we managed to run the DDR3 all the way to DDR3-1540. You are right 1540MHz. A X6800 is used and FSB is overclocked.

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