Controller: Toshiba TC58NC5HA9GST. NAND Memory: Toshiba Asynchronous 19mn MLC

Controller: LAMD LM87800. Flash Memory: Toshiba 19nm MLC.

Real World Speed
Performance profile from 66 user samples
Worst: 38% Best: 139%
SPEED RANK: 73rd / 697
Worst: 28% Best: 106%
SPEED RANK: 96th / 697
Avg. Sequential Read Speed
417 MB/s +3% 405 MB/s -3%
Avg. Sequential Write Speed
338 MB/s +4% 325 MB/s -4%
4K Read?
Avg. 4K Random Read Speed
19.1 MB/s -20% 22.9 MB/s Faster random read.
4K Write?
Avg. 4K Random Write Speed
50.8 MB/s -17% 59.3 MB/s Faster random write.
Avg. Sequential Mixed IO Speed
362 MB/s Slightly faster mixed IO speed.
334 MB/s -8%
4K Mixed
Avg. 4K Random Mixed IO Speed
27.3 MB/s Faster random mixed IO.
23.2 MB/s -18%
Peak Sequential Read Speed
506 MB/s -2% 516 MB/s +2%
Peak Sequential Write Speed
480 MB/s Slightly faster peak write speed.
438 MB/s -10%
4K Read?
Peak 4K Random Read Speed
20.4 MB/s -52% 31 MB/s Much faster peak random read.
4K Write?
Peak 4K Random Write Speed
65 MB/s -95% 127 MB/s Hugely faster peak random write.
Peak Sequential Mixed IO Speed
508 MB/s Slightly faster peak mixed IO speed.
473 MB/s -7%
4K Mixed
Peak 4K Random Mixed IO Speed
48.5 MB/s Much faster peak random mixed IO.
31.8 MB/s -53%
Value For Money
65 % -17% 76.2 % Better value.
User Rating?
UBM User Rating
70 % +3% 68 % -3%
Price (score)
155 GBP -5% 148 GBP +5%
Effective Speed?
Effective SSD Speed
445 MB/s -19% 531 MB/s Faster effective speed.
11 Months 0% 11 Months 0%
DQ Read?
Peak 4K-64Thread Read Speed
366 MB/s Slightly faster peak deep queue read.
347 MB/s -5%
DQ Write?
Peak 4K-64Thread Write Speed
192 MB/s -57% 302 MB/s Much faster peak deep queue write.
AS-SSD Read?
AS-SSD Read Score
437 Pts +2% 430 Pts -2%
AS-SSD Write?
AS-SSD Write Score
305 Pts -55% 474 Pts Much stronger server write.
AS-SSD Total?
AS-SSD Total Score
970 Pts -17% 1,131 Pts Stronger server IO.
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
223 MB/s Hugely faster peak deep queue mixed IO.
87 MB/s -156%
ADQ Read?
Avg. 4K-64Thread Read Speed
169 MB/s -15% 194 MB/s Slightly faster deep queue read.
ADQ Write?
Avg. 4K-64Thread Write Speed
161 MB/s -14% 184 MB/s Slightly faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
90 MB/s Much faster deep queue mixed IO.
59.7 MB/s -51%
256GB 240GB

The Toshiba HG5d is a reasonable SSD. Considering that Toshiba is amongst the few manufacturers that produce both their own NAND flash and SSD controllers, the HG5d is a little disappointing. With a Real World Speed of 444 MBps the Q Series lies just above the 50th percentile. Relative performance is better for server orientated workloads where the HG5d scored an AS SSD Total score of 970 points putting it in 11th position and at the 66th percentile, additionally the HG5d demonstrated very strong mixed 4K transfer rates peaking at 51.1 MB/s, the second highest seen to date on a 256GB SSD. The Toshiba HG5d is not a bad SSD but neither is it cutting edge which given it's relative youth counts strongly against it. Overall there are both faster and cheaper deals to be had elsewhere. [Sep '13 SSDrivePro]


This is Seagate's third foray into the the SSD market and it's clear from the specifications that Seagate haven't taken any chances. The 600 incorporates the now reasonably established LAMD LM87800 controller coupled with 19 NM Toshiba MLC, a very similar combination to Corsair's Neutron GTX. This combination of hardware coupled with Seagate's custom firmware produces a very solid set of performance figures. With a Real World Performance rating of 531 MB/s and an AS SSD total score of 1131 the Seagate 600 demonstrates both superb server and consumer performance capabilities. The pricing on the 600 is currently around average for a group leading SSD and likely to drop with time as the 600 is still relatively recent. Overall the 240GB Seagate 600 represents good value for money and delivers great performance. [Aug '13 SSDrivePro]


Solid State Drive User Rankings Chart

April 2014 SSD Rankings

Welcome to our consumer SSD comparison. We calculate effective speed which measures performance for typical consumers. Effective speed is adjusted by cost per GB to yield a value for money rating. Calculated values don't always tell the whole picture so we check them against thousands of individual user ratings. Vote to share your opinion. [SSDrivePro]

Group Test Results

How Fast Is Your SSD?

Size up your PC in less than a minute.

Welcome to our free PC speed test tool. UserBenchMark will compare the strengths and weaknesses of each component in your PC to the ten most popular components in its class.

How it works

  • - Download and run UserBenchMark (UBM)
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - Drive benchmarks include: read, write and mixed IO.
  • - CPU benchmarks include: integer, floating and string.
  • - GPU benchmarks include: DX9 and DX10 3D performance.
  • - Reports are generated and presented on
  • - Identify the strongest components in your PC
  • - See speed test results from other users
  • - Compare your components to the highest voted in class
  • - Share your opinion by voting

Frequently Asked Questions

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