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From: Davej on 14 Jan 2007 22:30
With many motherboards recommending 1.8V memory, why does it seem so
rare? Almost all PC6400 memory seems to be 1.9V or higher...

From: Paul on 15 Jan 2007 17:31
Davej wrote:

>
> Well, if you limit the search to 1.8V there are very few listed. I
> ordered the A-Data 1.8V but there isn't much good said about A-Data
> products, and the timing is 5-5-5-18 so I don't know what the 18 means.
> People seems to be recommending memory based on the brand name rather
> than the voltage spec. Thanks.
>

The importance of the timing specs is roughly left to right. So the
18 is not a big factor. The first 5 for CAS is supposed to have the
most impact on performance, as it affects first cycle latency.

This stuff claims to meet timing at JEDEC voltage.
http://www.valueram.com/datasheets/KHX6400D2_1G.pdf

This stuff too, although the prices are terrible.
http://www.crucial.com/store/partspecs.aspx?imodule=CT2KIT12864AA80E

Maybe the problem is a shortage of good chips at DDR2-800 speeds ?
I suppose this is not helping.

http://www.digitimes.com/510.asp

"DRAM inventory drops to below five days

Memory | Jan 9, 21:38
PC OEMs are now worried about whether they can secure enough DRAM
for upcoming shipments, as current inventory levels have fallen to
3-5 days on persistent strong demand, according to sources."

Maybe selecting some speed other than DDR2-800 is the answer.

Paul
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