DDR 400 on a DDR 266

Custom / CUSTOM
October 16, 2011 at 10:15:13
Specs: Windows 7, 3 GHz / 4094 MB
I have an old motherboard that support up to DDR 266. It have installed a 256MB DDR 333 chip on it and it runs smootly with a 1:1 ratio with the Athlon XP 2000+ Thoroughbred on it. I want to replace the 256 MB chip with a 512 MB DDR 400, so the PC can go a little faster. I can do this? Is there any problem? I see that the voltage of the DDR 400 is 2.6V, but I think I can ajust it wtih the BIOS.

The motherboard is an Micro-Star (MSI I think) MS-6390.


See More: DDR 400 on a DDR 266

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#1
October 16, 2011 at 10:23:08
If you run the 400 together with the other chip, the new ram will default to the old ram speed.

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#2
October 16, 2011 at 10:34:59
And if I put the new ram alone it will go to the mobo max speed of 133 Mhz?

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#3
October 16, 2011 at 11:04:06
266 from what you are saying, the board max. Most boards if set to automatic will make the adjustments, some require a manual change on some older ones a jumper on a motherboard. Bottom line with ram you can under utilize the ram, but you can't make it run any faster than rated....so just for theory a board with 4 ram slots each a different speed ram module in it, but the same size, the board will dumb down to the lowest common denominator for the speed. Ideally you have matching speed/size ram modules, but not always is this the situation.

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#4
October 16, 2011 at 11:07:04
Your say your ddr333 runs at a 1:1 ratio. That's what you should stick to for your cpu. Your ddr400 will run at 200 but will under clock to 333 when installed together. Your cpu runs at 133. the mobo supports up to pc3200 ddr400 which runs at 200, but your cpu can't use it.

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#5
October 17, 2011 at 07:23:15
The rated FSB of the mobo is of 266, as I see with the CPU-Z. I can overclock the cpu so it can run 1:1 with 200 mhz of the ram, can I?

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