sushi said:
I beg to differ...
Today, there are many 40GB Hard Drives for sale.
Prices for new 40GB are about $10-$20 cheaper than 80GB models. That is a significant savings on an OEM product.
I don't know the current standard mark up for OEM price costing, but let's say it's only 4 times. So a $10 OEM wholesale price difference would be equal to a $40 retail price difference. Of course the greater the difference in OEM price the greater the difference in retail pricing.
Now whether or not Apple decided to go with a 40GB vice 80GB is another issue. Everything must be taken into account when designing the package. In Apple's case, offering an 80GB may be a better marketing choice.
I don't think you're correct about the price premium of 40GB vs. 80GB hard drives. Presently, the lowest prices for various types of 3.5" hard drives on newegg.com are as follows:
40GB PATA: $41.99 (Western Digital Caviar WD400BB)
80GB PATA: $44.49 (Western Digital Caviar WD800BB)
40GB SATA: $45.99 (SAMSUNG SpinPoint P80SD HD040GJ)
80GB SATA: $45.99 (Western Digital Caviar SE WD800JD)
Obviously, Apple would probably pay lower prices that would not correlate precisely with these, but they are nevertheless a useful guide to current hard drive pricing.
These prices show a $2.50 price premium for 80GB PATA drives and no premium at all for 80GB SATA drives (and Apple will probably be using SATA drives in any new models they introduce). All the 40GB and 80GB drives on Newegg are priced quite similarly, between $41.99 and $50.99. So it seems unlikely that Apple would pay $10 more for 80GB versus 40GB drives; indeed, there may be no premium at all.
Also, most hard drive manufacturers do not list 40GB models in their most recently released families of drives. Samsung, Seagate, Hitachi, and Maxtor seem to offer 40GB models only from older product lines. The only manufacturer that may be offering latest-generation 40GB drives is Western Digital. They don't clearly differentiate families of drives, but they do offer several 40GB models and have obviously updated them somewhat recently, since they are available with 300 MB/s SATA. This picture suggests that as older hard drive lines are discontinued and supplies dry up, the availability of 40GB drives may become quite limited fairly soon, with perhaps only one manufacturer continuing to produce them.
We can get some idea of Apple's retail "markups" on hard drive prices relative to Newegg by looking at what Apple charges for hard drive upgrades in build-to-order configurations. The low-end iMac and Power Mac G5 both start with 160GB SATA drives. They can be upgraded to 250GB for $75, or to 500GB for $375. These compare to the following prices for the cheapest SATA drives of various capacities at Newegg:
120GB: $68.99 (Western Digital Caviar SE WD1200JS)
160GB: $64.99 (HITACHI Deskstar T7K250 HDT722516DLA380 (0A31637))
200GB: $76.99 (Western Digital Caviar SE WD2000JS)
250GB: $74.99 (Maxtor DiamondMax 10 6L250S0)
300GB: $94.99 (Seagate Barracuda 7200.9 ST3300822AS)
320GB: $108.99 (Western Digital Caviar SE WD3200JD)
400GB: $177.99 (Western Digital Caviar RE2 WD4000YR)
500GB: $249.99 (Western Digital Caviar SE16 WD5000KS)
So at Newegg, a 250GB drive costs $10 more than a 160GB drive, and a 500GB drive costs $185 more than a 160GB drive. The figure for the 250GB drive suggests an Apple "markup" relative to Newegg of 7.5x, but this figure is of questionable reliability because the variation in prices among different 160GB and 250GB drives is on the same order as the $10 price difference between the cheapest ones, so slight changes is drive pricing could change it quite a bit. The figure for the 500GB drive gives an Apple markup of about 2x, which is a more reliable figure, although it might not accurately reflect the markup for smaller-capacity drives.
Even taking the questionable 7.5x markup and the $2.50 price difference between 40GB and 80GB PATA drives at Newegg, we get a retail price difference of only $18.75, and I think the real figure would probably be lower. Considering this small price difference, coupled with the questionable future availability of 40GB 3.5" drives, I am quite sure Apple will not elect to use 40GB 3.5" drives in any future computer models.
On the other hand, there is a $19 price difference at Newegg between an 80GB SATA drive and the next larger model, which is large enough that Apple might well use 80GB drives in low-end desktop systems. It is also interesting to observe that in relatively low-capacity drives, there seems to be a pattern of two capacities having very similar prices, followed by a noticeably higher price for the next capacity up. As long as this trend holds, Apple is probably unlikely to offer 120GB and 200GB hard drives for much the same reason that they won't offer 40GB drives.