DDR Ram

[CLIFFORD ILKAY]

Rashkae wrote:
> NoOp wrote:
>> On 02/10/2009 02:32 PM, Karl F. Larsen wrote:
>>>     I am building a new computer. It's a Gigabyte motherboard and calls 
>>> for DDR2 400 ram. I could not find the DDR2 available and bought 4 GB of 
>>> DDR3 ram. I did some Google checking and it appears DDR2 wants 1.8 volts 
>>> and DDR3 wants 1.5 volts.
>>>
>>>     Does anyone know if 1.8 volts will harm a DDR3 ram? I have not 
>>> looked to see if I can drop the the voltage from the BIOS. Has anyone 
>>> had luck with this?
>>>
>>> Karl
>>>
>> Only with Puppy Linux...
>>
>> I think Ubuntu uses 12 volts.
>>
>>
>>
>>
> 
> Karl's in luck, the memory specification states that DDR3 can withstand
> a maximume of 1.975 volts without suffering damage.
> 
> However, installing DDR3 in the DDR2 socket will be very stiff..
> Initially, lots of pressure will be needed when inserting the RAM to
> mold the new notch properly.

"Mold the notch properly..." Oh, you mean destroy the RAM socket on the
motherboard. Got it. Even you managed to get the thing seated, the
timings are probably wrong and it's not likely to work anyway.

The "Ubuntu uses 12 volts" comment made by NoOp was nonsense. Ubuntu has
nothing to do with the voltage rating of RAM and using Puppy Linux isn't
going to magically reduce the voltage supplied to the RAM.

Fortunately, the original poster has changed his mind about trying to
use DDR3 RAM in place of DDR2-400. By the way, you can always use higher
frequency rated RAM, e.g. DDR2-667 in place of DDR2-400 but I've found
that even with two identical motherboards with the BIOS at the same
revision, it can be a hit-and-miss proposition. You just have to test. I
don't like mixing RAM of different brands, much less frequencies or
timings, on the same motherboard.
-- 
Regards,

Clifford Ilkay
Dinamis
1419-3266 Yonge St.
Toronto, ON
Canada  M4N 3P6

<http://dinamis.com>
+1 416-410-3326
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