Amd mining speed

1. If you don't optimize it, it's only 26-27. If you optimize BIOS, the computing power should be 29-30, depending on the brand and frequency.

2. Dig with n card, you can't even collect the electricity fee... If you want to mine, you'd better use a card honestly

3.

bitcoin was obtained by CPU in the early days. With the continuous development of GPU speed and the emerging advantages of GPU general computing, miners graally began to use GPU instead of CPU for mining. Bitcoin mining uses SHA-256 hash operation, which will carry out a large number of 32-bit integer cyclic right shift operation. Interestingly, this algorithm operation can be implemented by a single hardware instruction in AMD GPU, while it needs three hardware instructions to simulate in NVIDIA GPU. This one alone brings an additional 1.7 times of computing efficiency advantage for AMD GPU. With this advantage, amd GPU is favored by the majority of miners

advise the landlord not to dig up if the budget is not too much!!! This money is not earned if you want to

the difficulty of bitcoin is increasing. Mining with graphics card is a race against time. The main reason is that the difficulty of mining bitcoin is graally increasing (the reason of bitcoin algorithm design). If a set of platforms can get 1 bitcoin per day according to the current difficulty, then in one month, the platforms with the same computing power will only get 0.8 bitcoins, even the top graphics cards will get 18.2 days (which can't be shut down), and the lowest second-hand hd7750 will need more than 400 (it will take 214 days to get one). Just look at this figure (this is the data in May this year, Now it's more than 18 days)

people can earn money by buying several mining machines (mining machines with dozens of top graphics cards piled together)

I hope I can help you

4. Because amd graphics card provides a large number of simple computing resources, which is suitable for high-intensity and heavy load computing,
while NVIDIA graphics card provides less computing resources, mainly through software optimization to achieve game acceleration. In addition, game n card simplifies some moles used in scientific computing (mining just belongs to this kind of Computing),
therefore, in the face of mining, which is a simple and high load operation, the N card with weak body will not work

for now, the design between AMD and NVIDIA is more and more similar. The a-card part absorbs the advantages of serial and branch judgment of n-card, and the n-card part also adopts the simple violence stack design of a-card. So who has the advantage is a mathematical proportion problem, whose graphics card is more accurate to the proportion planning of game resources, whose performance is better

so mining depends on the efficiency of the algorithm. A card is really good at an algorithm called SHA-256, which was used in violent decoding before (so a card also has a good performance in violent decoding)

unfortunately, in order to rece the power consumption, n card has actually simplified some scientific computing moles. As we said downstairs, the CPU is good at the work of branch judgment. N card no longer relies on itself, instead, it has been deleted, leaving this part of the work to the CPU to the processor, so the general computing performance is weaker than a card. As for the advantages of N card in the field of professional card for a card mentioned by some people, it mainly depends on the early investment and construction in the application of software in the past, that is, the early optimization is still in place, and now the old customers are still eating well

it is true that Tianhe first used 4870 as accelerator card, but there may be a mistake, that is, it was not NVIDIA's Tesla that was used by new Tianhe, but Titan, another supercomputer, which was not entirely Tesla processor, but also AMD's Haolong processor for collaborative computing. In fact, tianhe-2 uses Intel's Xeon Phi processor, neither amd nor NVIDIA.

5. Because of different instructions, a card needs one instruction, n card may need three instructions, and a card has more computing units. As for the graphics card, it is faster than the processor because of different operation modes. GPU is dedicated to floating-point operation, and some CPUs have it, but it is not as good as GPU (for example, Xeon amd has no floating-point operation capability at all)

6. I don't know 7990. I haven't used it, but I used 290x. The general situation is as follows. If I is set to 20, the rejection rate is high, and the speed is a little more than 830k. I set it to 19, the speed is about 822k, the rejection rate is great. The 900K spread on the Internet is after overclocking, and the speed can reach 900 ~ 905. I haven't tested the power consumption after overclocking, but the actual mining power consumption is more than 200 watts. More accurate test, wait until the next shutdown! In addition, 7990 can only have 3 cards (6 cores) at most, and can support 4 cards (8 cores) with crack driver
in addition, 290x mining is not recommended. Because the noise is probably equivalent to the noise in the west of Yingze bridge in Taiyuan.

8. Bitcoin was obtained by CPU in the early days. With the continuous development of GPU speed and the emerging advantages of GPU general computing, miners graally began to use GPU instead of CPU for mining
bitcoin mining uses SHA-256 hash operation, which will carry out a large number of 32-bit integer cyclic right shift operations
interestingly, this kind of algorithm operation can be implemented by a single hardware instruction in AMD GPU, while it needs three hardware instructions to simulate in NVIDIA GPU. This alone brings an additional 1.7 times of computing efficiency advantage for AMD GPU.

9. Amd officially supports it, but in fact it doesn't. Even if you hit the ATI stream SDK, it's just as ineffective. After all, opencl1.0 was not officially finalized until the end of 2008, and rv770 was already under development in 2006. As a result, there was more than two years of stalling. Question: is there a √ in the OpenCL column of gpu-z? Now I want to use this card to mine, but OpenCL is required to answer: gpu-z can't completely believe it. This software detects the hardware ID in the BIOS of the graphics card, and then compares it with the database to reflect some parameters. If HD4850 is installed, then add the ATI stream SDK development kit and corresponding catalyst. So OpenCL is checked, but it just can't mine. So that's why amd officially supports it, but it doesn't. After all, I haven't seen HD4 Series graphics cards.