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Nvidia 650i owners

post #1 of 14
Thread Starter 
Can you tell me how the memory overclocking works? I can't seem to find it in any good reviews. I heard somewhere that there are no dividers and the memory clock is separate from FSB? If that's true, can you just key in whatever memory speed you want, like 916Mhz?

Thanks
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post #2 of 14
Yessir.
There are a few holes (ie, you put 950, it coems out 948, etc), but it's generally OK.

There are normal dividers as well, but the lowest is 1:1....then it's higher dividers to make your RAM run faster than your FSB. It's kinda weird. But it works.

BTW - It's a nVidia chipset, not an Intel chipset.
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post #3 of 14
Thread Starter 
Quote:
Originally Posted by The Pook View Post
Yessir.
There are a few holes (ie, you put 950, it coems out 948, etc), but it's generally OK.

There are normal dividers as well, but the lowest is 1:1....then it's higher dividers to make your RAM run faster than your FSB. It's kinda weird. But it works.

BTW - It's a nVidia chipset, not an Intel chipset.
Thanks!

So can I have a FSB of 500Mhz and a memory speed of 400Mhz (actual)?
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post #4 of 14
Set the first option to "Manual." (So you can edit FSB.)
Set second to "Unlinked."
Third will then be grayed out. (Will un-gray out if you set linked...which this box is then used for dividers which are 1:1, 3:2, and 4:5 IIRC...1:1 is the lowest divider though. All the others cause the RAM to run faster than the FSB.)
First box will be for your FSB. (Gotta put the quad number in, so 500 = 2000, etc)
Second box will be for your RAM. (800 = DDR2-800, 400 = DDR2-400)

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post #5 of 14
Thread Starter 
So... you can't run ram slower than FSB?
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post #6 of 14
Not while being linked.

If you set it to unlinked, you can set it to any number. (100-2000 IIRC. Haven't really tried. When my more-able RAM comes in, I might get past DDR2-1000 ).

Just there are no "formal" dividers to go slower. (IE, 5:4). The smallest divider is to run 1:1, other than that, they all are bigger. (So, 500FSB, but DDR2-1200 RAM.)

If you need slower RAM, just set it to unlinked and set it to what you want.
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post #7 of 14
Thread Starter 
Quote:
Originally Posted by The Pook View Post
Not while being linked.

If you set it to unlinked, you can set it to any number. (100-2000 IIRC. Haven't really tried. When my more-able RAM comes in, I might get past DDR2-1000 ).

Just there are no "formal" dividers to go slower. (IE, 5:4). The smallest divider is to run 1:1, other than that, they all are bigger. (So, 500FSB, but DDR2-1200 RAM.)

If you need slower RAM, just set it to unlinked and set it to what you want.
Sweet, that's perfect. I was considering getting a new motherboard but I just got a good deal on some DDR2 1066 instead. Thanks though!.
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post #8 of 14
Yep yep.

Don't expect 500+FSB on the 650i boards anyway, though.
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post #9 of 14
Thread Starter 
Quote:
Originally Posted by The Pook View Post
Yep yep.

Don't expect 500+FSB on the 650i boards anyway, though.
O rly? Darn, well that blows that whole idea anyway, I need like 600 FSB, lol.
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post #10 of 14
Yeah. 500 is pushing it on the board. Usually around 470-490 is the max.

You'll want a P35 chipset for that.
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