Re: How it is possible

micky <[email protected]> wrote:

> How it is possible that one SSD is 17 times as fast as another but costs
> less?   Both are 240G.   Why would anyone buy the slower one (like I did
> last summer)?
> 
> https://www.amazon.com/dp/B01N5IB20Q?ref=ppx_pop_dt_b_product_details&th=1
> 350 Mb per second   $35
> 
> https://www.amazon.com/PNY-CS900-240GB-Internal-Solid/dp/B0719D9YL7/ref=psdc_1292116011_t1_B01N5IB20Q?th=1
> 6 Gb per second     $30  plus $6 for a bracket if you need one. 
> 
> In the comparison list of the first one, 4 of them side by side, half
> way to the bottom of the page, 2 others are the same speed as the first,
> but the second one is 17 times as fast.
> 
> In a similar side-by-side comparison list on the second page, the same
> thing is true.  Only the PNY is so fast, and for less money.  Does PNY
> know something the others don't know.

Do you know the difference between a bit and a byte?  The first SSD says
its read spead is 500 MB/s (not 350 Mb/s).  Multiply 500 MB/s by 8 to
get Mb/s second, and what do you get?  4 Gb/s which is not far from the
rating for the other SSD.  In addition, the read spec for the PNY SSD is
not the 6 Gb/s you stated, but 535 MB/s as stated by the Amazon ad, so
its read speed would be 8 x 535 MB/s = 4.3 Gb/s.

You also need to consider the brand of the SSD.  You are comparing
Kingston to PNY.  PNY is okay, but has higher fail rates (from my
personal experience) than for Kingston.  This is brand, not by whomever
is the actual manufacturer on which a brand slaps on its sticker.
Brands can contract specs with the manufacturer: the same maker can
produce different quality products based on what the customer specifies.

Is it your custom to compare normal retail price against sale price?
The PNY is on sale.  It's non-sale price is $40 which is higher than the
Kingston product.  Sales come and go.  Compare apples to apples.  Even
you know your grocery store has sales, but that's not the normal price.

Next time, drink a cup of coffee an hour before researching SSD prices
and specs.  Don't compare MB/s to GB/s unless you convert.  Don't
compare sale with non-sale price.  Today, for you, was one those "Oops"
days.