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USB 3 Speeds


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#1 bigdog1100

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Posted 15 March 2012 - 09:29 AM

I am just wondering, if actual USB 3 speeds are around 75-100 MB/s, what hardware supports utilizing maximum 5 GB/s USB 3 speeds?

Motherboard: ASUS P8Z68-V LX; Processor: Intel i5 2500k; RAM 24GB: CORSAIR XMS3 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800); CORSAIR Vengeance 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800); Video Card: MSI AMD Radeon RX 470 Gaming X 4G GDDR5; Storage: HDD 2TB Seagate ST2000DM001-9YN164; SSD 500GB Samsung 860 EVO 500GB;Power Supply:  OCZ ZS Series 650W 80PLUS Bronze High Performance Power Supply; Multi-card reader: Nippon Labs Delux 3.5" Internal All In One Card Reader/Writer with USB2.0 & eSATA Ports Model ICR-BB. Optical 1: LG GH22NS90; Optical 2:  ASUS BW-12B1ST; Fans: 3x80mm, CPU Cooling: XIGMATEK LOKI SD963. So there are total of 6 fans.
 


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#2 rotor123

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Posted 15 March 2012 - 10:40 AM

Everything I've seen reported and what I have observed in my own usage is that USB3 is worth it for the performance boost.

You have to understand that MB/s is megabytes per second and Gb/s is gigabits per second.

Each byte is = to 8 bits plus some overhead.

the 5Gbp/s is a theoretical maximum speed. You will never see it.

Going beyond that transferring data from a hard drive to a hard drive the speed will be limited by the slowest device in the chain of devices.

For example SATA is 1.5Gbp/s speed, SATA II is 3Gbp/s and SATA III id 6Gbp/s Maximum theoretical speeds.
In the real world these will be affected by many things including the fact that hard drives can not sustain that speed.
many small files will take longer to transfer than one large file.

Go to here http://www.hdtune.com/ and run a test on your hard drives. You will most likely see your hard drives average 80 to 90 MBp/s transfer speed. So no way to transfer faster than that.

Almost forgot you could probably get faster transfer speed by having SSD drives in the computer and the external case since they do run a faster transfer rate and have a very low access time.

Cheers
Roger

Edited by rotor123, 15 March 2012 - 10:43 AM.

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#3 bigdog1100

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Posted 15 March 2012 - 11:56 AM

Thank you Roger. The reason I asked this is flash drive that is USB 3 promises to be slow as well. Like in this example of USB 3 flash drive. Read Speed up to 120 MB/s; Write Speed up to 70 MB/s Now while I am not planning to buy this at this time, it sure lowers my expectations.

Edited by bigdog1100, 15 March 2012 - 11:59 AM.

Motherboard: ASUS P8Z68-V LX; Processor: Intel i5 2500k; RAM 24GB: CORSAIR XMS3 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800); CORSAIR Vengeance 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800); Video Card: MSI AMD Radeon RX 470 Gaming X 4G GDDR5; Storage: HDD 2TB Seagate ST2000DM001-9YN164; SSD 500GB Samsung 860 EVO 500GB;Power Supply:  OCZ ZS Series 650W 80PLUS Bronze High Performance Power Supply; Multi-card reader: Nippon Labs Delux 3.5" Internal All In One Card Reader/Writer with USB2.0 & eSATA Ports Model ICR-BB. Optical 1: LG GH22NS90; Optical 2:  ASUS BW-12B1ST; Fans: 3x80mm, CPU Cooling: XIGMATEK LOKI SD963. So there are total of 6 fans.
 





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