SanDiskSDSSDXPS-240G
SamsungMZ-7TE250BW

Controller: Marvell 88SS9187-BLD2. Flash Memory: SanDisk 19nm eX2 ABL MLC. Release date: Q2 2014.

Controller: Samsung 3 Core MEX. Memory: Samsung 19nm Toggle Mode TLC. Release date: Q3 2013.

Real World Speed
Performance profile from 227,977 user samples
10,862 User Benchmarks
Best Bench: 114% 83GB free (System drive)
Worst Bench: 65% 20GB free (System drive)
Poor: 65% Great: 114%
SPEED RANK: 316th / 1080
217,115 User Benchmarks
Best Bench: 118% 68GB free
Worst Bench: 64% 231GB free
Poor: 64% Great: 118%
SPEED RANK: 284th / 1080
Effective Speed
Effective SSD Speed
91.7 % 95.9 % +5%
Read
Avg. Sequential Read Speed
455 MB/s 465 MB/s +2%
Write
Avg. Sequential Write Speed
406 MB/s +3% 394 MB/s
4K Read
Avg. 4K Random Read Speed
28.9 MB/s 38.8 MB/s Much faster random read.
+34%
4K Write
Avg. 4K Random Write Speed
76.5 MB/s 85.3 MB/s Faster random write.
+12%
Mixed
Avg. Sequential Mixed IO Speed
258 MB/s 347 MB/s Much faster mixed IO speed.
+34%
4K Mixed
Avg. 4K Random Mixed IO Speed
33.4 MB/s 48 MB/s Much faster random mixed IO.
+44%
SusWrite
Avg. Sustained Write Speed
350 MB/s Much faster sustained write speed.
+79%
195 MB/s
Read
Peak Sequential Read Speed
509 MB/s +0% 507 MB/s
Write
Peak Sequential Write Speed
479 MB/s 489 MB/s +2%
4K Read
Peak 4K Random Read Speed
35.6 MB/s 46.7 MB/s Much faster peak random read.
+31%
4K Write
Peak 4K Random Write Speed
113 MB/s 119 MB/s Slightly faster peak random write.
+5%
Mixed
Peak Sequential Mixed IO Speed
316 MB/s 418 MB/s Much faster peak mixed IO speed.
+32%
4K Mixed
Peak 4K Random Mixed IO Speed
42.4 MB/s 59.8 MB/s Much faster peak random mixed IO.
+41%
SusWrite
Peak Sequential Sustained Write 60s Average
480 MB/s Much faster peak sustained write speed.
+61%
299 MB/s
Market Share
Based on 76,410,805 SSDs tested
Market Share
Market Share (trailing 30 days)
0.01 % 0.14 % Insanely higher market share.
+1,300%
Value
Value For Money
13.7 % 18.2 % Much better value.
+33%
User Rating
UBM User Rating
54 % +2% 53 %
Price
Price (score)
$79 $60 Cheaper.
+24%
Age
Newest
121 Months Slightly more recent.
+8%
132 Months
DQ Read
Peak 4K-64Thread Read Speed
376 MB/s 383 MB/s +2%
DQ Write
Peak 4K-64Thread Write Speed
343 MB/s 362 MB/s Slightly faster peak deep queue write.
+6%
AS-SSD Total
AS-SSD Total Score
1,214 Pts 1,273 Pts +5%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
164 MB/s 237 MB/s Much faster peak deep queue mixed IO.
+45%
ADQ Read
Avg. 4K-64Thread Read Speed
325 MB/s 337 MB/s +4%
ADQ Write
Avg. 4K-64Thread Write Speed
267 MB/s 293 MB/s Slightly faster deep queue write.
+10%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
148 MB/s 203 MB/s Much faster deep queue mixed IO.
+37%
Capacity
Capacity
240GB 250GB
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The 240GB Sandisk Extreme Pro uses the same controller and NAND as its 13 months younger predecessor, the Extreme II. Comparing the Extreme II and Extreme Pro shows that average performance has increased by 10% but peak performance remains broadly unchanged. The Pro features an improved nCache which uses an SLC buffer to cache writes prior to writing them to the slower MLC NAND. In order to benefit from this improved caching, huge amounts of data need to be written for extended periods, an unlikely consumer scenario. Comparing core performance between the Samsung 840 Evo and Extreme Pro shows that the Extreme Pro averages around 12% faster than the Evo. The Extreme Pro also has a 10 year warranty but I wonder if SATA 3 will even be around at that time. Although the Extreme Pro has a superb performance profile it's not a game changer. [Jun '14 SSDrivePro]

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The Evo is remarkable in that, like the Sandisk Extreme II, it features a second level cache. For the 250 GB Evo this consists of a 3 GB Turbowrite cache (TWC) which is a block of high speed Flash Memory. When the TWC is exhausted write speeds drop by approximately 50% but that won't often happen under typical consumer workloads. In terms of raw performance, even with its cache, the Evo still isn't the fastest drive. With a real world speed index reading of 439 MB/s the EVO is however, within reach of the two speed leaders (Vector and 850 Pro). At a price point of $130 the Evo is around 30% cheaper making it the best value for money SSDs I have seen in 2014. Comparing the Evo and the Sandisk Ultra Plus shows that the Evo is the winner but the Sandisk may be a viable alternative thanks to its cache-free, and therefore more consistent performance during extended writes. [Aug '14 SSDrivePro]

MORE DETAILS

Solid State Drive Rankings (Price vs Performance) July 2024 SSD Rankings

Welcome to our SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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