For our power consumption testing, we have the drive connected to the system as a secondary drive. To record the wattage, we are using a Triplett 1101-B multimeter connected in line with the 5v power on our SATA power cable to the drive. The multimeter records the min/max amperage draw from the drive over our testing period.
We also record the drive’s sequential and random read and write power draw using Iometer. During power testing we have AHCI link power management (HIPM and DIPM) enabled. We then take the values recorded and calculate the wattage of the drive. Some of the results may seem high compared to a standard notebook HDD as these are peak values under load. When we see average power draw, SSDs are still more power efficient because they only hit max power for a short period of time.
Silicon Power has not published actual active and idle power ratings for the S80 in the drive’s specifications on the S80 product page, so we can only attempt to verify their claim of “low power consumption.” Idle power draw was 0.31W. Peak power draw was 8.20W. Active power consumption is not the same as peak, which is seen in the graph above. During our testing the highest consumption we were able to reach was 3.925W, which was under sequential writes. During sequential reads it draws up to 2.44W on average. During 4K QD 1 consumption we see a similar trend for the sequential draw with the 4K read averaging 1.03W and 4K write averaging 1.60W. These power measurements are below average for similar drives, and Silicon Power’s claim of “low power consumption” is valid by comparison.
REPORT ANALYSIS AND FINAL THOUGHTS
It is always interesting to see new/different NAND controllers come to market, and it usually takes the new controller showing up in several drive variations to determine its ultimate effectiveness; especially in regards to comparing its performance to that of well-established controllers. SandForce was for a long while about the only game in town for those SSD producers who were not vertically integrated, and had to go out and acquire NAND and controllers to assemble their drives with. The Phison PS3108-S8 has been showing up in a number of drives lately, and as far as drives that TSSDR has reviewed, we have noticed that this Phison controller definitely gives most drives a boost in write speeds.
The Silicon Power Slim S80 combines the reliability of Toshiba’s 19nm MLC NAND with the Phison PS3108-S8 controller to achieve ATTO transfer speeds of 555 MB/s (reads) and 535 MB/s (writes), which ranks right up there with the best SATA 6Gb/s drives available. The IOPS come in a little light on the read side, but certainly not below our expectations of a value-priced client SSD. We achieved about average results in our AS SSD, Anvil Storage Utilities, and PCMark Vantage storage suite testing. Our PCMark 8 consistency testing placed this drive right up there with the premium-level SanDisk Extreme Pro 256GB drive for the portion of the testing that relates to everyday client usage.
Silicon Power’s Slim S80 240GB SSD was a bit of a pleasant surprise to review, as its performance as a client drive is right up there with some drives that sell for much more of a premium price. With the 240GB version selling for $89.99 (as of date of publication of this report), it comes in at an amazing 37 cents per gigabyte! This capacity point is significantly lower than the price per gigabyte of the other available capacities for this drive. The 240GB Silicon Power S80 has definitely achieved a price-to-performance sweet spot, and we are proud to recommend the S80 and award it our Silver Seal.