美国海淘    三星 Samsung 850 EVO 250GB 2.5寸 SSD 固态硬盘约￥1091

kly cloning my primary drive over to this one, it was ready for use.,371First thing I did was download and install the free Samsung Magician software (which as of version 4.6 now recognizes this drive as a Samsung drive) and ran a benchmark. Here are the results:Sequential Read: 549 MB/sSequential Write: 523 MB/sRandom Read (IOPs): 97,371Random Write (IOPs): 86,219Then, I used the Samsung Magician software to enable RAPID mode. For those unfamiliar with RAPID, it is an acronym for Real-time Accelerated Processing of I/O Data and was first introduced with the 840 EVO series of drives. This feature has since been updated to v2.1 for this drive/version of Samsung Magician 4.6. In short, what it does is use up to 25% of your extra system RAM (up to 4GB maximum if you have 16GB+ of system RAM) and use it as a cache for your drive to improve the already blazing fast performance. This is completely automated and does help overall system performance, especially with commonly used applications as the software will cache them automatically for faster load times and decreased latency. Be sure you enable this feature on your drive.Overall I am very satisfied with this drive. My boot times are around 10-15 seconds and I highly recommend it if you are thinking of purchasing this. The 5 year warranty sealed the deal for me.

nd the laptop booted right up. I run a lot of simulations on this laptop and the 850 EVO is processing them with no problems. It's been running 24X7 for over a week now. I also installed and run Samsung Magician V 4.6 to optimize the operation of the SSD. This version recognizes the 850 EVO mSATA SSD.

ny installed drive - Samsung or not). You cannot, as yet, use the RAPID mode or Performance Optimization. Having said that, here are some performance comparisons. The mSATA Samsung 850 EVO showed Seq Read of 550 MB/s, Seq Write of 525 MB/s, Random Read of 97,209 IOPS, Random Write of 88,076 IOPS. By comparison, a Crucial MX100 installed in the same laptop showed: Seq Read of 559 MB/s, Seq Write of 507 MB/s, Random Read of 83,557 IOPS, and Random Write of 84,238 IOPS.

ut command queuing. Since all current operating systems I use (Windows 7 and later, Linux and Mac) all enable command queuing by default I'll focus on those results.The drive does great with sequential reads/writes. I got reads of about 550MB/s and writes of about 512MB/s. Most SSD drives do fairly well on sequential read/write operations and this drive is only about 10% queued vs unqueued.This 850 EVO drive did better than many other drives with random reads at about 300MB/s and writes at about 251MB/s. Unqueued reads were about 32MB/S (almost 1/10th the queued rate!) and writes were about 79MB/s (about 1/3 the queued rate). Command queuing makes a big difference with random access and makes this drive stand out for this use.The mSATA form factor provides a SSD that is very compact compared to 2.5in drives. It has the same 6Gb/s data rate limit as 2.5in SATA drives. Other than size, connector or weight these are just like those physically larger drives SATA SSD drives. You can just stick SATA connector on this drive - it won't fit. If you want to use one of these in place of a 2.5in or 3.5in drive you'll need an adapter.There is another kind of SSD that looks a lot like a mSATA and can be easily confused with it. The M.2 drive (aka NGFF form factor) uses a PCI-Express interface instead of SATA. M.2 drives are not at all compatible or interchangeable with mSATA! These are not limited by the SATA data rate bottleneck and if you have a compatible interface they can be MUCH faster than a SATA SSD!In conclusion, this 850 mSATA is one of the faster SATA SSD drives ones I've used, especially on random reads/writes with queuing enabled. If your computer takes this form factor this is a great SSD. If you are replacing a 2.5in hard drive or SSD this is NOT a good choice: get the 2.5in version of this SSD!This drive was perfect for this upgrade for my client. The laptop has both a 2.5in and mSATA bays making cloning very easy and quick. The old mechanical drive is now retired and their previously fairly fast laptop now just flies! With this sort of result I love this upgrade and drive. Definitely 5 stars.