What's the power

1. If you want me to say, which is my favorite second generation Maxwell architecture graphics card? I personally like the gtx970. However, I'm talking about a couple. From February to September this year, the price has dropped by 200 yuan, and now it has become a thousand yuan graphics card

group 970sli costs only about 4000

a while ago, I ran on the Z97 platform. It's really very powerful. However, can two mid-range cards play with one flagship card? I don't think so

these days, I have a new skylake platform + gtx980ti on hand. Would you like to see if my inference is right? Limited by conditions, the two platforms are different. Will there be a big gap between the fourth generation core i5 and the sixth generation core i5, DDR3 and DDR4? Let's first look at the configuration

970sli platform:

i5 4670k

Huaqing z97x killer

Kingston DDR3 2400 8gx2

Mingyu gtx970 wind series x2

and 980ti platform:

i5 6600k

Huaqing Z170 gaming K4

Weigang DDR4 2400 8gx2

Mingyu gtx980ti

Z170 new platform, With the new DDR4 memory and the same i5, the progress brought by the new platform is obvious

take the conventional chess as an example, the performance of multi-core and multi thread. The score of the sixth generation i5 is 573 points higher than that of the fourth generation i5. Of course, it's meaningless to just look at the CPU benchmark. Let's take a look at the performance of the game< The score of 970 SLI is as high as 9000980, and Ti is only over 8000

2. The ex mode of the new 3dmark firestrike scenario

the front 3dmark 11970 SLI is obviously ahead, however, when it comes to the new 3dmark, the situation is completely reversed. Let's take a look at the specifications

a 970 has 1664 CUDA units, 32 gratings and 104 texture units. The video memory is 256bit, and the bit width of the video memory is 224.4gb/s. For two pictures, you can simply think of it as 1664 times 2, 32 gratings times 2. As for the video memory? Sorry, it's not superimposed

as for gtx980ti, it has 2816 CUDA units, 96 gratings and 176 texture units. However, SLI is not simply 1 + 1 = 2, that is to say, you can't just look at the paper. The two 970 SLIS add up to 3328 CUDA units. In the previous 3dmark test, the two have won and lost each other. So what's the situation in the game? 1080p is not necessary, basically a single 970 can be achieved. Let's take a look at the performance of both under 4K resolution< The average frame number of 970sli is 31.3, and that of gtx980ti is 29.3, which is OK

4. Killer 5 pardons

similarly, Killer 5 has 65 frames in 970sli and 56 frames in 980ti. Note that this is the highest special effect with 4K resolution

5. Final Fantasy 14 network version

970sli is 8540980ti is 8399< At the end of the day, 980ti has won a small game. Under the 4K high resolution, there are still 24.67 frames, which is higher than the 24 frames of 970sli< Under the Tomb Raider 9

4K, the 970sli is also slightly better. Due to the limitation of test conditions, 970sli has not run the new stand-alone blockbuster. Therefore, it can only be said that it is a comparison. However, 980ti can almost beat two medium and high-end graphics cards by itself, so it has two brushes

as for the better choice, I don't think it's important. Flagship single card, easy to use, especially for upgraded users, if the high-end card group SLI, it depends on the compatibility of the game.

2. There is no doubt that geforce gtx980ti is more worthy of high-end players than gtx980 under the current market price. Because no matter in terms of cost performance or game performance requirements, gtx980ti is undoubtedly the new flagship with overwhelming advantages. Even if the non-public gtx980ti is more expensive than 300-500 yuan, its cost performance is still too high.

4. The resultant force r of the normal reaction N and the friction f is called the total reaction supporting the object
that is, when the friction f reaches the maximum value Fmax, the angle a also reaches the maximum value B, which is called the friction angle
tanb = f / N = FN / N = f
the formula shows that the tangent of friction angle B is equal to the static friction coefficient
if the line of action of the resultant force Q of the active force acting on the object is within the friction angle, no matter how large the force is, there will always be a total reaction r balanced with it, and the object will remain stationary; On the contrary, if the line of action of the resultant force Q of the main force is beyond the friction angle, no matter how small the force is, the object can not keep balance. This kind of equilibrium condition, which is independent of the force but related to the friction angle, is called self-locking condition. The equilibrium phenomenon of an object under this condition is called self-locking phenomenon.

5. The resultant force r of the normal reaction N and the friction f is called the total reaction supporting the object
that is, when the friction f reaches the maximum value Fmax, the angle a also reaches the maximum value B, which is called the friction angle< br />tanb=f/N= μ < The formula shows that the tangent of friction angle B is equal to the static friction coefficient.

6. Static friction angle φ ms = arctg μ S approximation φ m = φ MS (you know)
for a certain F,
when θ The forward component fcos increases from 0 to 0 θ And the friction resistance becomes smaller μ( mg+Fsin θ) When it becomes larger,
when θ= arctg(1/ μ) The & quot; Self locking & quot; Therefore, it can be predicted from above that when θ= arctg(1/ μ) No matter how much f is, most objects cannot be pushed

7. 1、 Angle of friction definition: the angle between the total reaction force at the contact point and the common normal at the moment when two members begin to slide relative to each other. Friction angle: when the object is in the critical state of sliding, the static friction FS reaches the maximum value Fmax. At this time, the angle between FR and FN is also the maximum. At this time, the static friction FS reaches the maximum value Fmax φ M is called friction angle. 2、 The resultant force r of the normal reaction N and the friction f is called the total reaction supporting the object. That is, when the friction f reaches the maximum value Fmax, the angle a also reaches the maximum value B, which is called the friction angle. Tanb = f / N = FN / N = f the formula shows that the tangent of friction angle B is equal to the static friction coefficient. If the line of action of the resultant force Q of the active force acting on the body is within the friction angle, no matter how large the force is, there will always be a total reaction r balanced with it, and the body will remain stationary; On the contrary, if the line of action of the resultant force Q of the main force is beyond the friction angle, no matter how small the force is, the object can not keep balance. This kind of equilibrium condition, which is independent of the force but related to the friction angle, is called self-locking condition. The equilibrium phenomenon of an object under this condition is called self-locking phenomenon. 2

8. Why can't I see the question