On 1/25/10 12:48 AM, Kris Tilford of [email protected] sent
> On Jan 24, 2010, at 11:21 PM, Dana Collins wrote:
>
>> If you have used PC-100 in a unit designed for faster RAM, I would
>> say that
>> is an anomaly, or you have the darned luckiest Mac on the planet!
>
> I've noticed that sometimes RAM sold as slower RAM is actually a
> faster variety. You need to inspect the individual chips on each
> module to determine how fast they are. When faster RAM is sold as
> slower, it will normally be labeled as the slower RAM, and will
> sometimes identify to the system as slower RAM, but an inspection of
> the individual chips in the sure way to know the speed. I believe this
> occurs because it's simply cheaper to produce newer faster chips on
> smaller dies than the older slower chips. Also, larger modules can be
> made with less total chips. Thus, new RAM labeled as PC66 or PC100
> might in fact be PC133 modules simply labeled as PC66 or PC100.
>
> The same holds true with video cards, sometimes video cards have
> faster VRAM chips than the card's firmware specifies, and these cards
> are normally able to be safely overclocked to whatever speed the
> individual VRAM chips support. When older slower chips run out of
> stock they simply continue production using newer faster chips.
O-h-h-h .. Thanks for the clarification!
Dana
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