Modules mémoires

Is DDR2 backward compatible with DDR1? No. DDR2 memory sockets can only support DDR2 DIMMs, and vice versa. DDR2 DIMMs come in a new 240-pin module and have a notch in a different position from the notch of DDR1.Additionally,DDR1 DIMMs use a 2.5v supply but DDR2 DIMMs only need a 1.8v supply.

What`s the difference between a rank and a bank? According to JEDEC`s new definitions,a bank is a block of memory within a RAM chip while a rank is a block of memory on a module. So what used to becalled two-sided or two-bank modules will now be called two-rank modules.

Does DDR2 have the same bus width as DDR? Yes, DDR2 retains the same 64-bit wide data bus used in DDR. Most DDR2 chipsets, like thelatest DDR chipsets, are expected to support dual channel memory, giving an effective 128-bitwide data bus.

Do DDR2 chips look different than DDR chips? Yes and No. Most DDR modules are built with TSOP style chips which have pins sticking outthe sides. DDR chips also come in a less common FBGA package which is physically smaller, anduses a grid of tiny solder balls on bottom to make electrical contact with the board. At present the FBGA package is the standard for all DDR2 chips.

What are the advantages of FBGA style chips? FBGA is a smaller package with requires less real estate on the memory module. In other words,more chips can fit onto a shorter module. The greatest benefit of FBGA is that it has less electricalnoise than TSOP chips, which results in improved signal integrity.

Why can`t my computer run stable after Silicon-Power module is installed? (Use the Memtest86 to test your modules) 1. Please confirm the module is suitable for your computer.
2. Please check your BIOS setting is correct.
3. You can download the memory test program by following URL to see if your
    module is good part or not. User guide please refer to the url  for 
    detail. http://www.memtest86.com/

Why can my computer only recognize 128MB capacity when 256MB memory is installed? 1.Please check if your computer can install more than 256MB capacity.
2.Please check if your computer`s chipset can only recognize 128Mbit DRAM
   chip.Please replace by another one which is double side,and has total 16pcs 
   DRAM chips on it.

Is that normal if I install 4GB memory but BIOS can only recognize about 3.6GB capacity,why? Yes, it`s normal because when you install more than 4GB capacity, system resources (including ICH,AGP/ PCI,etc) will re-map memory address from upper memory area
to lower area, that`s why BIOS always shows less than 4GB capacity

What is the difference between SDRAM and DDR? SDRAM is actually SDR SDRAM, and DDR is actually DDR SDRAM, though the former does not usually have the SDR in front of it. The letters SDR and DDR stand for Single Data Rate and Double Data Rate, and the letters SDRAM stand for Synchronous Dynamic Random Access Memory. There are a lot of little differences, except the voltage they use are different,the main one that affects the user is speed:
DDR can transfer data at roughly twice the speed of SDR.
More speedy data rates = better performance.
They are not interchangeable and in general they`re not used at the same time even your MB support both the two type.

Portable SSDs

How to transfer images or videos from an iPhone to an external storage? 1. Connect your external device to the iPhone   2. Open the [Photo] app and select images or videos you want to transfer     3. Tap [Share] button on the bottom left     4. Tap [Save to Files] in the dropdown menu     5. Navigate to the name of your external device and tap [Save] on the top right, and that’s it!  

How to transfer images or videos from an external storage to an iPhone? 1. Connect your iPhone to an external device   2. Open the [Files] app and select the name of your external device (below locations)     3. Select images or videos you want to transfer     4. Tap [Share] button on the bottom left     5. Tap [Save Image] and enjoy  

Clés USB

My USB flash drive shows up in Device manager but not in file manager (No removable drive is added). Using Windows disk management please assign a drive letter to removable disk in disk manager.

After I formatted the USB drive under Windows OS, my Mac doesn??t recognize it anymore Please check the file system you choose to format the disk.Mac OS is fully compatible with FAT system files but not FAT32 or NTFS.Please reformat it as FAT files under Windows OS.If you format the disk as a HDD or USB ZIP by the utility program under Windows OS, it won't be recognized by Mac OS, either. Please reformat it as a FDD by the utility program under Windows OS

My Mac OS doesn't see the USB drive. This device is driver free under Mac OS 9.0 or above. It should be plug and play.If the USB mass storage driver of Mac system was modified or deleted, it might not see the USB drive when it's plugged in. Please first remove all USB devices from the system. Visit Apple's website to download the USB driver then install it. Also, please plug it directly into the onboard USB port instead the port on keyboards, USB hubs or extension cables.

I have a 512MB Flash disk, but how come I can only see 498MB capacity usable the most? Windows systems use the binary system, therefore, 1MB = 1024KB. However, the Flash memory disk is the decimal system based, which means 1MB = 1000KB. In other words, we have to check the capacity from byte numbers instead of MB number.

My windows 98SE system does not recognize the USB drive after installing its driver Please follow the steps below to reinstall the driver under windows 98SE.

1.Plug the USB drive into USB port.
2.Go to Device Manager (Right click on My computer icon > properties > hardware >
   device manager)
3.Click + next to the Universal serial bus controllers or other devices
4.Right click the device that is with! ,? Or X symbol then choose uninstall
5.Unplug the USB drive from USB port.
6.If you have had ever installed other drivers for the USB drive, please remove
   them by  using the add/remove programs function.
7.Install the driver.
8.Reboot the system without the drive plugged in.
9.Plug in the drive after the desktop boots up completely.
10.System should find new hardware and you may see a removable disk in My
   Computer.Please don't plug in the drive before completing the driver 
   installation.Make sure the USB drive is plug tightly into the USB port.

My computer can't recognize my USB flash. Cause:(1)The product can support Windows XP pro (SP2) and Win2K (SP3) without the installation of an extra driver, please make sure you have the latest Service Pack (SP 2) for your Windows Operating System.(2)Maybe Your USB Storage Driver of Microsoft has lost some files.Or you haven't installed the USB Storage Driver from Microsoft.Solution:

1.Check the USB port is enabled and powered.
2.Plug the product then go to device manager (Right click the My computer icon,
   properties, hardware, device manager)
3.Click + next to the Universal serial bus controllers or other device to see if anything
   that is with yellow question mark or green exclamation mark.
4.Please choose it and update the driver. You may choose Windows Update or from
   the CD-ROM. (Please insert Microsoft Windows XP/2000/ME CD). This device should
   show as a USB mass storage device in USB Controllers, and the driver position
   should be C:WINDOWSsystem32driversusbstor.sys. Moreover, please disable the
   anti-virus program (ex: Norton Virus SW) just in case the software obstruct the
   detecting. And if this computer is in the office, please check your user permission in
   the system.

Transfer speeds fluctuated or dropped when I copied/moved files to USB drive on a Windows 10 system. The speed we specify is of the average speed instead of the instantaneous speed, the results you see may be affected how the Windows 10 OS transfers data.Please refer to below solutions:
1. Please reformat USB drive to NTFS, please be sure to back up your file before formatting.
2. Please confirm if it is necessary to update USB driver.
3.Please connect the USB drive to different USB ports.

If the same problem still can’t be solved, please refer to Crystal Disk Mark software to test the performance and provide us the testing result by issuing customer support request to verify the root cause .

You are plugging a USB 2.0 device into a USB 1.1 port. This is not an error message it is an informational message. The reader/USB flash drive will still work but it will only perform at USB 1.1 speed.

Flash Cards

What is the difference between FAT16 and FAT32? What format should I use to format my memory card? When saving a file, the computer will record the name, location and size of the file at the same time. Such information will be stored in the FAT (File Allocation Table). In FAT16, the system uses 16-bit space to express the file allocation information in each sector, the number of clusters in each sector is 65,536. For 32KB clusters, FAT can support hard drives with a capacity up to 2GB. In order to solve the capacity handling problem of FAT16, the FAT32 was invented to support hard drives with a capacity up to 2048GB. Currently, most personal electronics still use the FAT16 file format, if you are not sure if they support FAT32 or not, we recommend you format your memory card in the FAT16 format.

What should I do if the memory card does not support my device (digital cameras, mobiles, PDAs or card readers)? Please follow the instructions below to check your device before contacting us. * Please make sure that your device can fully support that memory card. For example, what is the capacity limit of your device? * Format the memory card with your device and check if the problem persists. * Format the memory card with an external card reader and check if the problem persists. * If the problem persists after doing so, we recommend you send the memory card back to Team or contact your dealer for further assistance.

Why can’t I use high-capacity memory cards on my digital camera? Please contact your camera dealer to find out the maximum memory card capacity your camera supports.

After editing pictures in the memory card from the PC, I can’t read them from the digital camera. First, check if the path where the edited pictures are stored has been changed. This should include the folder name and picture name. Or, check if the file format has been changed. If it is so, the camera or PDA may be unable to read them. Moreover, if you are editing files stored in a memory card, we recommend you to make a backup of them in the hard drive before editing them

What do the three transfer rates of SDHC cards mean? The SD Association has defined 3 specifications to facilitate users to distinguish the transfer rate of SDHC cards. According to the SD Association, all SDHC must at least meet the following 3 read rates: Class 2: 2 MB/s; Class 4: 4 MB/s; Class 6: 6 MB/s. You can identify the specification of your SDHC card and device with these transfer rates.

What is SD 2.0 (SDHC)? The SD2.0 (SDHC) supports FAT32, making it can support a capacity up to 32B. There are 3 transfer rates for SDHC, Class2 at 2MB/sec, Class 4 at 4MB/sec and Class6 at 6MB/sec. Devices supporting SD2.0 can read data from SD2.0, SD1.0 and SD1.1 memory cards. However, older devices cannot support SD2.0 memory cards.

What Card Works Best with Your Device? SD memory cards come in three different physical sizes: SD, miniSD, and microSD. The SD card is typically used in personal computers, video cameras, digital cameras and other large consumer electronics devices. The microSD and miniSD cards are commonly used in smaller electronic devices like mobile phones. Some manufacturers offer adapters to fit a traditional SD card slot, allowing even greater versatility and flexibility to use the card in a mobile phone as well as a computer or video camera. To determine the right card for your device, always consult the device's user manual or contact the manufacturer. All SD memory card formats are readily available in the marketplace and can be found in a range of retail outlets including drug stores, electronics and computer shops and Internet sites.

What should be considered when buying memory cards for photography? We recommend you consider the following questions. The capacity need will depend on the resolution of your camera and the number of pictures you wish to store in the memory card. o What capacity is needed? o What memory card is compatible with my system? o How much does the memory card cost? o What is the read/write speed of the memory card? Does it meet my need? *The actual recording time will vary depending on camera model , selected resolution , compression settings and recorded content varies . Part of host devices may not support the forefront of all flash storage capacity . Please refer to the device's documentation to understand the capacity of support .

Why can’t I use high-capacity memory cards on my digital camera? Please contact your camera dealer to find out the maximum memory card capacity your camera supports.

What does The "X" speed rating gives users a performance indicator on how fast the card can transfer images. Flash cards with higher speed rating X-speed rating are designed to perform faster. The X-speed rating can also be translated into another common measurement of performance - MegaBytes (MB) per second of read speed. To determine the actual MB per second, you must know the value of "X" and do the math using the multiplier number and the value of X as claimed by the product. For example: Value of X = 150 KiloBytes* per second, noted as 150 KB/sec. 133X = 133(multiplier) x 150KB/sec or 20 MB/sec 1 KB = 1,000 Bytes; 1 MB = 1 million BytesNote: The speed may vary due to host and device configuration.

My Mac OS doesn't see the USB Card Reader. This device is driver free under Mac OS 9.0 or above. It should be plug and play.If the USB mass storage driver of Mac system was modified or deleted, it might not see the USB drive when it's plugged in. Please first remove all USB devices from the system. Visit Apple's website to download the USB driver then install it. Also, please plug it directly into the onboard USB port instead the port on keyboards, USB hubs or extension cables.