Overclocking RAM with a 64+

[Mandible]

I am buying a new rig soon, with an AMD 64 5000+ Black Edition, and am planning to push it up over 3ghz, obviously with help from a more experienced friend.

However, i am wanting to use DDR2 667, and the review of ocing the CPU quotes a max DD2 800 level when getting it up and above 3.3ghz. Can an AMD synchronise its HTT speed with its RAM frequency? im guessing no, as the 64+'s run at 200mhz default, so the RAM would be doing DD2-400 i think...

Anywho, what HTTRAM ratio can be achieved on the CPU i want to use? Is it possible to run DD2 667 (stock freq) at DD2 750-800, or should i use my £18 budget overhead to step up to some better ram? Ideas please!

 

[Mandible]

Quick little side-note here, i am using this

motherboard, will it be ok, or, should i change?

 

[Ham]

1st off, moved to the right section.

As for the ram, DDR is a big con imo. DDR2 running at '800mhz' is actually running at 400mhz. But the bus is still only 200mhz. So to run a true 1:1 @ stock you'd need to be running PC-6400 (DDR2-800) ram. It all to do with them cramming in extra packets rather than raising the bus speeds.

A nice set of PC5300 (ie balistix) will usually let you overclock your ram to 800 and beyond.

 

[Mandible]

ok, i knew that ddr2 means you double up the freq, but surely if HTT is 200mhz, the ram is running at 400, not 800, or is it because it is a dual core CPU, so the HTT doubles. OK, so good 5400 RAM can run at 800mhz? will it want to be a 4-4-4-12 timing? and is there any corsair ram from scan or dabs that fits these criteria at below 48 quid?

 

[Ham]

http://www.crucial.com/uk/store/partspecs.aspx?IMODULE=BL2KIT12864AA663

Id just go for that tbh.

 

[Mandible]

found some corsair 6400, the xms2 stuff.