Memory cannot open dual channel mode. What's going on here?

However, when upgrading the memory, I found that although the motherboard supports dual-channel memory, neither memory works in dual-channel mode, and the performance is greatly reduced. How to turn on dual-channel memory mode? Let's take a look at the specific situation!

Dual-channel activation thought

The memory parameters are written into the memory SPD chip and then read by the motherboard BIOS, so as to judge whether it is a dual-channel mode, and the memory SPD information can be modified. If the SPD information of two memories is changed to the same by software, can't the motherboard BIOS be fooled to activate the dual-channel mode of memory?

Read SPD information in memory

To modify the memory SPD information, you must know the memory SPD information. Take the author's notebook as an example. After running the CPU-Z software, switch to? SPD？ The window, in? Memory slot selection? Choice? Slot number 1? At this time, you can see that the standard memory is modern DDR2 667(5 12MB). Choice? Slot #2? After that, we can see that the upgraded memory is Samsung DDR2 533(5 12MB). If Samsung memory is modified, the memory frequency will be used from DDR2 533 to DDR2 667, which means that the memory is overclocked, but the overclocking potential must be confirmed. For security reasons, the author decided to modify modern memory, that is, memory will be used from DDR2 667 to DDR2 533.

1, run SPD tool in? Documents? Reading? Select DDR2533 memory under the menu. For example, the memory is installed in the slot 1. What should I choose at this time? Module 1: Installed? .

2. When the software reads the SPD information in the memory, it is displayed in? Documents? Select from the menu? Save? Save the memory SPD information.

3. enter? Documents? Write? Menu, select? Module 2: Installed? , the software will immediately perform memory writing.

4. Restart the system after writing. If it can be turned on, when testing with Master Lu's software, the two memories have formed a dual-channel mode at this time, and the running speed is obviously improved by running the application software for testing.

Supplement: Common Maintenance Skills of Memory

1. For the faults caused by dust in the memory golden finger and the oxide layer of the graphics card, everyone should use rubber or cotton dipped in alcohol to clean it, so that the screen will not be black.

2. Regarding the problem of mixed memory, try to choose the same memory as you have when upgrading memory. Don't think that buying new mainstream memory will greatly increase the performance of your computer. On the contrary, there may be many problems. Principle of mixed memory: Insert low-standard and low-standard memory into the first memory slot (DIMM 1).

3. When only one memory needs to be installed, the memory slot close to the CPU slot should be preferred. The advantage of this is that the memory can be cleaned after being polluted by the dust brought out by the CPU fan, but the socket is extremely difficult to clean after being polluted.

4. Install the memory module, and there is a latch on both sides of DIMM slot. When the memory gap is properly aligned and inserted, these two latches should automatically connect the memory? Bite? Live. There is only one gap on the gold finger of DDR memory, and both sides of the gap are asymmetric, which corresponds to a rib on the DIMM memory slot, so the direction is easy to determine. For the previous SDR, there are two gaps, and it is easy to determine the direction, but SDR has gradually faded out of the market, so it doesn't hurt to know; When pulling out the memory, just move two paws outward, and the memory will automatically come out of the DIMM (or RIMM) slot.

Related reading: common methods to distinguish authenticity in memory chips

Check the memory stick: the genuine Kingston memory stick is printed clearly and regularly, while the fake is obviously rough and thin, and the font looks thinner. In addition, the typesetting rules of the true and false Kingston memory labels are quite different, please observe carefully.

Check the memory particles: It can be clearly seen from the Kingston memory particles in the picture that the genuine Kingston memory particles print clearly, while the fake memory particles are very dim, which is in sharp contrast with the genuine ones. For a memory, PCB only accounts for about 10% of the memory cost, and memory particles are the key to determine the memory price. So usually fake PCBs are basically made by regular foundries, and particles are jargon? White film? That is what we call inferior products, the price is low, but the stability and compatibility are poor.

Check the registered trademark logo: the registered trademark of authentic Kingston? r？ A circle composed of the English letter "KINGSTON" is clearly printed around, while the fake is just a circular box that is obviously copied at will. One more thing, carefully observe the watermark inside the label. There are obvious traces at the junction of the fake memory watermark and Kingston font, which proves that it is post-printed and will not appear in the genuine Kingston memory.

Gold finger identification: the bottom is the gold finger of genuine Kingston memory. The gold finger in Kingston's memory is pure in color, and the gold finger connection part in the purple box is plated with gold; The gold finger in the fake Kingston memory is slightly darker, and the gold finger connector in the red box is a copper piece of PCB board without gold plating.

Font recognition on PCB: On the left is genuine Kingston memory. Authentic Kingston memory fonts are uniform, with no obvious size difference and relevant certification symbols. Fake Kingston memory fonts are different, and there are no related authentication symbols.

K-shaped label: this is a macro shot with a SLR camera, and at the same time, the flash is turned on to shoot the true and false label. The laser pattern of the genuine label can see dense silver powder particles, the K-shaped label is not obvious, and the background is blue. However, the K-shaped label of counterfeit money is very obvious, and the particle density of silver powder is low.

Flip the angle to view the anti-counterfeiting: the laser anti-counterfeiting label of genuine Kingston memory can present two patterns by changing the angle. The first pattern is the silver powder effect along the upper half and the semi-K dyeing along the lower half; The second pattern has a silver powder effect on the lower half edge and a semi-K shape on the upper half edge. Fake labels have only one pattern, that is, the whole presents an obvious K word.

Query serial number: verification method memory product editing SMS? M+ product serial number? Send to 02 12 333 0345

According to Kingston's official statement, I input? M3678524 157 1636？ Send? 02 123330345? You can check the authenticity of the memory!