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

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

Real World Speed
Performance profile from 203 user samples
80 User Benchmarks
Best Bench: 115% 189GB free
Worst Bench: 51% 69GB free
Worst: 51% Best: 115%
SPEED RANK: 99th / 597
123 User Benchmarks
Best Bench: 109% 52GB free
Worst Bench: 47% 100GB free
Worst: 47% Best: 109%
SPEED RANK: 72nd / 597
Avg. Sequential Read Speed
491 MB/s +2% 482 MB/s -2%
Avg. Sequential Write Speed
393 MB/s +2% 387 MB/s -2%
4K Read
Avg. 4K Random Read Speed
20 MB/s -15% 23 MB/s Faster random read.
4K Write
Avg. 4K Random Write Speed
62.1 MB/s -6% 65.9 MB/s Slightly faster random write.
Avg. Sequential Mixed IO Speed
418 MB/s Slightly faster mixed IO speed.
396 MB/s -6%
4K Mixed
Avg. 4K Random Mixed IO Speed
28 MB/s Slightly faster random mixed IO.
24.4 MB/s -15%
Peak Sequential Read Speed
519 MB/s +1% 512 MB/s -1%
Peak Sequential Write Speed
488 MB/s Slightly faster peak write speed.
445 MB/s -10%
4K Read
Peak 4K Random Read Speed
27.4 MB/s -5% 28.7 MB/s +5%
4K Write
Peak 4K Random Write Speed
108 MB/s +3% 105 MB/s -3%
Peak Sequential Mixed IO Speed
503 MB/s Slightly faster peak mixed IO speed.
469 MB/s -7%
4K Mixed
Peak 4K Random Mixed IO Speed
43.5 MB/s Much faster peak random mixed IO.
31.8 MB/s -37%
Value For Money
54.3 % -6% 57.6 % Slightly better value.
User Rating
UBM User Rating
63 % -3% 65 % +3%
Price (score)
$225 -12% $198 Slightly cheaper.
Effective Speed
Effective SSD Speed
83.8 % -3% 86.1 % +3%
22 Months 0% 22 Months 0%
DQ Read
Peak 4K-64Thread Read Speed
357 MB/s +1% 353 MB/s -1%
DQ Write
Peak 4K-64Thread Write Speed
318 MB/s -3% 328 MB/s +3%
AS-SSD Total
AS-SSD Total Score
1,141 Pts +0% 1,138 Pts -0%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
214 MB/s Hugely faster peak deep queue mixed IO.
86.3 MB/s -148%
ADQ Read
Avg. 4K-64Thread Read Speed
203 MB/s -2% 207 MB/s +2%
ADQ Write
Avg. 4K-64Thread Write Speed
182 MB/s -18% 215 MB/s Faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
104 MB/s Much faster deep queue mixed IO.
62 MB/s -68%
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]


How Fast Is Your SSD? (Bench your build) 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
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PC Builder will help you build your perfect PC by clearly presenting relevant performance statistics together with price, compatibility and popularity data.

Frequently Asked Questions


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