R4 mining machine memory

1. This computer room is Zhai Wenjie; mining & quot; It's a good place. These are the machines that Zhai Wenjie modified to dig bitcoin. Eight graphics card almost day and night to calculate, the temperature in the room is significantly higher than outside. Zhai Wenjie said: & quot; A total of 12 mining machines, there are also on the side, because it has too much heat dissipation, you can feel it with your hand, now you can boil eggs. The power consumption is about 60 yuan a day& quot; Sun Minjie & quot; Mining & quot; Our machines have hardly stopped. Sun Minjie said: & quot; Its mining principle is to have a set of very complex encryption and decryption algorithm, do the operation of discrete sequence, and then it is evenly distributed to all the mining people connected to the Internet. In this way, who contributes more computing power will get more& quot;

2.

In the same 4GB server memory, the differences between 2rx4 and 4rx8 are as follows: different particles in memory, different physical banks, different compatibility

First, memory particles are different:

1.2rx4: the number of memory particles of 2rx4 is 8

2.4rx8: the number of memory particles in 4rx8 memory is 16

Second, physical banks are different:

1.2rx4: 2rx4 physical banks are a group of 64 bits

The physical bank of

2.4rx8: 4rx8 has two groups of 64 bits

Third, different compatibility

1, 2rx4: the compatibility of 2rx4 is worse than that of 4rx8, and the overclocking performance is worse

2, 4rx8: the compatibility of 4rx8 is better than that of 2rx4, and the overclocking performance is better

{rrrrrrr}

extended data:

difference between server memory mole and ordinary memory:

1. Server memory mole: it has some unique technology, so it has high stability and error correction performance

Ordinary memory mole: it is a computer component that CPU can address through bus and read and write

2. Different characteristics

1. Server memory mole: the intuitive way to distinguish server memory from ordinary memory is to see whether the words on the note have ECC mole

Ordinary memory mole: the part that reads and writes in bus mode; Memory is not just a data warehouse. In addition to a small number of essential programs in the operating system, the commonly used programs, such as windows, Linux and other system software, including typing software, game software and other application software

Server memory mole: the more advanced aspect than parity correction technology is not only to find errors, but also to correct these errors. After these errors are corrected, the computer can correctly perform the following tasks to ensure the normal operation of the server

Common memory mole: parity check code is widely used in debugging code, adding a check bit to each data character (or byte), and can detect all odd (even) parity errors in a character

resources: network server memory

3. NDSL try not to play video, not good for the card, because the TF card is a low speed card, it is easy to burn your TF card or R4, mine is R4, can only look at e-books or something, comics can also. But the video really does not recommend, it is better to buy a MP4

4. R4 burning card is a DS burning card with slot1 port. It has the characteristics of S1 port mainstream burn card: no need to brush, built-in boot function, can boot GBA side burn card, and support cleanrom function through dynamic patch, which is very convenient to use. As an early burning card, R4 supports up to 4GB standard TF card, but does not support SDHC standard TF card. R4-sdhc as the name suggests, the biggest feature of r4-sdhc is that it supports SDHC. SDHC is the abbreviation of "High Capacity SD memory card", that is, "High Capacity SD memory card". In May 2006, SD Association released the latest version of SD 2.0 system specification, which stipulates that SDHC is a SD card with capacity greater than 2GB and less than or equal to 32GB, which conforms to the new specification. The biggest characteristic of SDHC is its high capacity (2gb-32gb). In addition, the SD Association stipulates that the FAT32 file system must be used in SDHC, because the FAT16 file system previously used in SD card supports a maximum capacity of 2GB, which can not meet the requirements of SDHC. In short, the storage capacity is greatly increased. SDHC format memory card has a minimum capacity of 4G, which can store 40 or more NDS games or 1000 MP3 or more photos, etc. R4-sdhc supports 6G, 8g and even higher capacity TF cards in the future.

5.

Keil compile, 0 error, 0 warning. It's probably a matter of your keil settings

solution:

1. I don't know if you have deleted starup.a51 under the sourcegroup group. If not, right-click on

starup.a51 and select remove & quot; Starup.A51"， Try compiling again

2. Code address overlap will also prompt this error, but I checked the code, no problem, if there is still

in the problem, change the starting address to 100h, org0100h

if there are any more questions, hi me

6. Digital storm
what I'm using now is 3W. It's estimated that it's not enough for a machine with more than $1W.
three graphics cards will soon be 1w5.
of course, the monitor will take care of itself
let me give you a suggestion
- Intel Core i7 4960x CPU
- 32GB 1866mhz memory Corsair dominion platinum DHX
- 4x SLI NVIDIA GTX 780 Ti 3gb (evga superclocked ACX cooler Edition)
- Copper Pipe liquid cooling
- 240gb Corsair neutral GTX SSD
- 1TB 7200rpm storage HDD
- ASUS x79 chipset motherboard
- 1200W Corsair ax1200i PSU
- Blu ray player / DVD writer
in case of chassis, Black Ops aventum II

except that I don't need so many graphics cards, I have two graphics cards, four for me useless

7. Your computer virtual memory is not enough
method 1: buy a memory mole and make sure it's OK<

method 2: right click my computer - Advanced - performance, click "Settings", then click "advanced", click "change" at the bottom, and select "custom size"
Enter 512 or 1024, preferably not too large. After entering, click "Settings", and finally click "OK"
to start the game again.

8. STMFD SP，{R0-R7，LR} 的伪代码如下
SP ＝ SP － 9×4
address = SP;
for i = 0 to 7
Memory[address] = Ri;
address = address + 4;
Memory[address] = LR;
详见私信

9. The fourth generation of double data rate generation synchronous dynamic random access memory (DDR4 SDRAM) is a high bandwidth computer memory specification. It is a memory proct of SDRAM family. It is the latest memory specification since DRAM was used in 1970. It aims to completely replace the old memory specification

ddr4-sdram provides lower power supply voltage and higher bandwidth than DDR3 / ddr2-sdram. However, e to the inconsistency between voltage standard, physical interface and ddr3-sdram, ddr4-sdram is not downward compatible with the previous generation of DDR3 / DDR2 / DDR. At present, most of the processor procts launched by two major x86 processor manufacturers, ultramicro and Intel, support ddr4-sdram.

10. You wrote the following code very well:

stringlist of the list = new ArrayList ()

is (int i = 0; I < s. Length, I +) {

string SS = s [i]

if (stringlist. Size() = 0) {

Yes INT J = 0;& lt; stringList.size; J +) {

if (SS= Stringlist. Get (x)) {

stringlist. Add (SS)

} other {

stringlist.add (SS)

system. Out. Println ("with different words: + stringlist. Size() +" a ")

the algorithm is problematic. At least, the wording of SS = stringlist. Get (J) is bad. The comparison between objects is equal to the method to be used, unless you want to compare whether the object is its own object, not its content

the simple method is as follows:

stringlist of the list = new arraylist()

is (int i = 0; I & lt; S length;. I + +) {

if) {/ / use the method contained in the list to determine whether to repeat
stringlist. Add (s [one]) (! stringList.containsS [I]; / / Only add stringlist without

}

}
system. Out. Println ("with different words: +). Dimension () + "a");