I made a comparison between the iMac storage options and current market options (hope this helps people):
HDD, I chose the Seagate Barracuda series in 1tb, 2tb, and 3tb models.
SSD, for the fusion drive SSD I chose the Samsung SM951 PCie M.2 128GB NVMe. This is 124$. Reads are 1500MB/s and writes are 600 MB/s, very close to what we see in the SSD portion of the Fusion drive.
For the pure SSD I chose the Samsung 950 NVMe PCIe M.2 256GB/512gb models, pretty comparable read/writes. No 1TB standalone SSD comes close (Samsung EVO is 1/3 to 1/4 PCIe speeds)
I think the correct way to do this is to assume that when Apple determined the $1799 base price for the 27", 100$ of that is the 1TB HDD. Which means the base price for a theoretical 0-storage model for the 27" retina is $1699. This means all storage options will have an increase of 100$. New premiums:
1TB HD: 100/47-1= 112% premium
1TB FD: 200/70.25-1= 184%
2TB FD: 400/188-1= 112%
3TB FD: 500/209-1=139%
256GB SSD: 300/198-1=51%
512GB SSD: 600/345-1=74%
1TB SSD: 1100/690-1=59%
So now the SSDs look a lot better than the options - with the 1TB Fusion drive being the absolute largest premium % wise (worst bang for your buck if comparing to market rates - you are paying 200$ for a 47$ 1TB HDD and 23$ 24GB SSD).
However, if we were comparing purely based on $ value, then the 1TB is quite obviously the worst.
1TB HDD: 53$ premium
1TB FD: 130$
2TB FD: 212$
3TB FD: 291$
256GB SSD: 102$
512GB SSD: 255$
1TB SSD: 410$
HDD, I chose the Seagate Barracuda series in 1tb, 2tb, and 3tb models.
SSD, for the fusion drive SSD I chose the Samsung SM951 PCie M.2 128GB NVMe. This is 124$. Reads are 1500MB/s and writes are 600 MB/s, very close to what we see in the SSD portion of the Fusion drive.
For the pure SSD I chose the Samsung 950 NVMe PCIe M.2 256GB/512gb models, pretty comparable read/writes. No 1TB standalone SSD comes close (Samsung EVO is 1/3 to 1/4 PCIe speeds)
I think the correct way to do this is to assume that when Apple determined the $1799 base price for the 27", 100$ of that is the 1TB HDD. Which means the base price for a theoretical 0-storage model for the 27" retina is $1699. This means all storage options will have an increase of 100$. New premiums:
1TB HD: 100/47-1= 112% premium
1TB FD: 200/70.25-1= 184%
2TB FD: 400/188-1= 112%
3TB FD: 500/209-1=139%
256GB SSD: 300/198-1=51%
512GB SSD: 600/345-1=74%
1TB SSD: 1100/690-1=59%
So now the SSDs look a lot better than the options - with the 1TB Fusion drive being the absolute largest premium % wise (worst bang for your buck if comparing to market rates - you are paying 200$ for a 47$ 1TB HDD and 23$ 24GB SSD).
However, if we were comparing purely based on $ value, then the 1TB is quite obviously the worst.
1TB HDD: 53$ premium
1TB FD: 130$
2TB FD: 212$
3TB FD: 291$
256GB SSD: 102$
512GB SSD: 255$
1TB SSD: 410$
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