Why does ibm R51E install 2 1G memory and only display 1G?

You can use software like cpuz to identify, see how many memories are recognized by the memory option, if only one memory is recognized, it means that the memory may not be in contact with the slot, and the system does not recognize this memory.

You can remove the memory and clean up the gold finger of the memory and the hygiene of the memory slot. Or swap the two memory slots and try it out.

Supplement: If this is the case, it shouldn't be a problem that you don't plug in well, I believe you can't plug one well, and the other is always plugged in badly. You might as well try to root it again.

Remove the original memory, add another memory and try, back and forth, you can always find the answer.

The machine can support up to 2GB of RAM (1GB x 2), at the moment you need to install the two memories separately to ensure that both memories are easy to use, if the two are added together and only recognize 1GB, it is a compatibility problem!

Of course, you must make sure that the memory has been added, and don't affect the recognition because it has not been tightened!

First make sure that both memory is good.

Then plug them into each of the two slots and see how much memory the system displays.

It should be your motherboard and hardware configuration, and you can't use more than the memory configuration. To find out if that's the case, you take a 2G memory stick and plug it in and see how it happens! If my suspicions are correct, then the machine won't start!!

Maybe it's not plugged in.

With 2 RAM (of the same size), it is possible to form a dual channel if the motherboard supports it, which will speed up the speed between the CPU and the memory.

1 First of all, get rid of a misunderstanding.

Dual-channel is dual-channel, not dual-channel memory.

Rather, it is a memory control technology between the motherboard and the CPU. Memory on the market can be used to form a dual-channel, as long as your motherboard supports it.

2. Advantages of dual channels.

1) It can bring 2 times the memory bandwidth, so that those software that must exchange memory data frequently can get great benefits, such as Spec Viewperf, 3DMAX, IBM Data Explorer, Lightscape, etc.

2) When the onboard graphics card shares memory, the high memory bandwidth brought by the dual-channel technology can help the graphics card get a smoother speed in the game, taking 3DMark2001SE as an example, the gap in its score can be widened to 15-40%.

3. Disadvantages of dual channels.

1) It must be built on a motherboard that supports dual channels, and there must be two memory modules of the same capacity and type. Intel's dual-channel has high requirements for memory type and capacity, and the two memory sticks must be identical. The dual-channel motherboards of SIS and VIA allow different capacities and types of memory to coexist, as long as there are two memory sticks.

2) The dual-channel memory control technology has a very small gap with the single-channel in ordinary games and applications.

4) The connection of the double channel is very important for the first hand, once the connection is not correct, the double channel will not work.

5) Dual-channel memory architecture, which is difficult to overclock, which affects friends who like DIY overclocking.

It mainly depends on your system, and if you have some large games or programs on your computer, 2G memory will make the program or game run more smoothly.

Memory modules have no effect on CFF disks, they are not the same concept

In addition, you can unplug the memory module, wipe the gold finger with an eraser, and if you have a small brush, you can also brush the memory insertion, many problems are caused by poor oxidation contact of the gold finger on the memory module

If the motherboard supports dual-channel and your two memory modules perform the same, after installing them on the corresponding slot, the speed can be improved by turning on the dual-channel function compared to a single memory module!

Memory and hard disk have nothing to do with each other, the single and double of memory depends on whether your motherboard supports dual channels, if the two are not very mixed, it is best not to use them together, it is easy to burn....

The capacity of the CDF disk is the hard disk, not the memory, and the performance of 2 1G dual channels can be improved to a certain extent, and you only have 1G memory left, not to mention dual channels, and the direct memory will be reduced by 1G The performance will inevitably decrease.

Of course, the memory size can be expanded, and 2 can also be combined into dual channels to get additional performance improvements.

Is there a difference between two 8G and one 16G memory?

Hello, unplugging one will affect the speed! But it won't affect the hard drive! When you unplug a single one, you can set up virtual memory to fill it!

Server memory and desktop memory are not universal, server memory in addition to the ECC mentioned upstairs also has chipkill, register, hot-swap technology, etc., with extremely high stability and error correction performance.

ECC memory is error correction memory, simply put, it has the function of finding errors and correcting errors, and generally applies to servers and graphics workstations (now DDR2 or above desktop memory also has such technology), which will make the entire computer system more secure and stable when working.

Chipkill technology was developed by IBM to solve the shortcomings of ECC technology in current server memory, and is a new ECC memory protection standard. We know that ECC memory can only detect and correct a single bit of error at the same time, but if it detects an error in more than two bits of data at the same time, there is generally nothing that can be done.

register is a register or directory register, the role in memory we can understand it as the directory of the book, with it, when the memory receives the read and write instructions, it will first retrieve the directory, and then carry out the read and write operation, which will greatly improve the server memory work efficiency.

The above are very old parameters 8 years ago, you use the 3650m2 machine There are redundant chips on the memory, that is to say, if a chip in the memory is wrong, you can continue to use it, and the device will prompt you to replace the new memory.

You have to remove the original four 1G, try with two 4G alone, if you make sure that the memory is good, you see if the position is wrong, the correct position should be, 1 4 7 10 plugged

x3650 7979 It seems that the 1G memory in front should be placed in the front and the single 4G added in the back should be inserted in the order of the back!

1 4 7 10 2 5 8 9 Give that 1 2 4 5 plug 1g 7 10 plug 4g give it a try!

Since it's normal to dismantle one, it means that these two memories are incompatible, so they can't be started Generally, for high compatibility, it's better to choose the same brand and the same frequency bar, and you'd better deal with the modern one in Kingston.

A single 2G 6400S has passed the actual test, and the IBM R51E is used in the personal hand.

Support upstairs. But so. I guess yours is a compatibility issue. Since 2 gigabytes of memory are supported. Go for a single 2g one. I think the stability is good.

What do I think of your DDR memory machine, how did your second-generation memory fit in?

Yes, the motherboard is with an RC410 chipset.

The maximum support is up to 2G, don't add more.

IBM's compatibility is very good, and it basically doesn't pick a strip.

Pick a long warranty to start with.

IBMR40E does not support 1G memory, only supports a single 512MB memory, so this can only be used as 512M memory, there is no solution to the limitations of the motherboard, you can only wait to change the computer!

Your old book only supports 1G memory, and then it was borrowed by the graphics card partially, so there is 750M left.

This IBM R51E laptop is a Centrino, which can support up to 2G of memory, two memory slots one under a rectangular cover on the bottom of the laptop, and one under the laptop keyboard, and the memory can be upgraded by removing the keyboard.

In addition to memory, CPU, hard disk can also be upgraded, CPU can be replaced with a higher specification of PM 770, the current one is PM750, the hard disk can be changed to 7200 rpm, currently 5400 rpm, the speed is faster.

There is a little sound on the hard drive, nothing else, it should be normal. It does not affect the use and can not be replaced.

IBM notebooks have always been a good brand with good quality. Your IBM is too old, and there are compatibility issues with the memory, especially the new memory and the old memory cannot be used at the same time, so it is normal for the situation to occur as you described. As for whether it can be extended to 2G, it depends on whether the motherboard supports it.

It is unlikely that the upgrade will be accelerated, because the general software upgrade is very fast, such as Office is used in the 2010 version, and the files are very large. The hard disk always makes a sound, which means that there is a bad policy, and it is also unusable. Sum it up with no more money.

You can use it for as long as you want.

This problem is caused by the mismatch between the server and Microsoft:

What operating system do you have?

You can go into the file and add dev to the end of the file!

The R51E motherboard I bought last year supports a maximum of 1G, I don't know, mine is to add a 512 to the back, and now it's 768, otherwise you can take out the memory under the keyboard and sell it, and then change to a 1G one, which is actually not onboard, and can be taken out.

I don't know about 667 but the 533 I added is okay.

The same external frequency can be used together, but if you buy a 1g one, unplug the 256M one! There's no need, and the motherboard doesn't recognize it!

Your computer fits Kingston DDRII 533 1G RAM.

1g+256 can be used.

Added: If you plug in DDR2 667 1G, it will be reduced to DDR2 533, and there is a possibility of compatibility issues with the previous memory, so it is best to use only one DDR2 667 or buy a 533 to share with the previous memory.

1g 667 is not recommended, 1g 533 is recommended.

Pull out the original root, it shouldn't be possible to use it together. Even if you can use it for the time being, there will be problems in the future.