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Class 4 card really a class 6?

post #1 of 2
Thread Starter 
I got a lexar 8gb micro sdhc and is supposed to be class 4 but I am getting 9mb write and 20mb transfer.

I read people with the 16gb class 4 also reported higher speeds over class 6, Is this really a class 6 card then?.

Thanks.
    
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post #2 of 2
Class just guarantees the minimum sequential write speed. It really doesn't tell you much beyond that. They don't care how fast or slow it is, as long as it's over the minimum. Lots of Class 4 cards are rated that way to cut their testing costs and also satisfy a pricepoint. (Similar to AMD taking a Quad-core and disabling two cores (trivial to re-enable) - they do it to satisfy a pricepoint... some people will look at the price difference and pay for the extra two cores. Others will go with the cheaper option, and may be rewarded with a quadcore if they understand how technology and marketing work.)
     
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CPUMotherboardGraphicsRAM
FX-8350 @ 4.6ghz 1.425v Sabertooth 990FX Zotac GTX 1070 Amp! 32GB (4x8GB) Kingston Fury 1866mhz CL10 1T 1.5v 
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Hitachi 2TB - HDS723020BLA64 Crucial M500 960GB - CT960M500SSD1 WD 4TB Black - WD4001FAEX WD 4TB Black - WD4001FAEX 
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Seagate 2TB - ST2000DM001 WD 640GB Black - WD6401AALS Seagate 6TB - ST6000DM001 Micron M500 - MTFDDAK480MAV 
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Pioneer DVR-115DBK Samsung SH-S243D/BEBE LG GH22NS90 Lite-On EBAU108 External DVD 
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Noctua NH-D15 Fractal Design 140mm Fan - FD-FAN-140 Fractal Design 120mm Fan - FD-FAN-120 Windows 7 
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Ubuntu 14.04 LTS Samsung 2343BWX 23" (2048x1152) BenQ GW2765HT 27" IPS LCD Monitor (2560x1440) Genius Keyboard KB-G235 PA 
PowerCaseMouseMouse Pad
Seasonic Platinum 1000w PSU - SS-1000XP Fractal Design Define R5 Steelseries Rival 6500 dcpi Mousepad + Desk 
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Onboard Realtek® ALC 892 Cyber Acoustics CA-2992 2.0 Speakers Razer Krait 1600 DPI nGear G-C1601 Card Reader 
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Pisen Card Reader Gigabyte M7 Thor 
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