Rx570 has low computational power

1. This should be inaccurate. It's hard to distinguish, it's hard.

2. I5 2500K is a good choice. If you want to be more advanced, the budget is abundant, and you can use i5 3570k. With AMD, you can use the next generation of sharp dragon. The 1700x is the most cost-effective.

3. The performance of rx570 is slightly better than 1050ti, not as good as 1060 3G. If you want to play games smoothly, you can use rx580 or 2060.

4. Please take a screenshot of the configuration! Make sure the display data cable is plugged into the graphics card

5. 1. You can bring your own books in. But after entering, some areas are not allowed to take bags, such as the magazine area
2. The environment is very good. The higher the floor is, the quieter it is. Generally, the 5th floor is the quietest with few people
3. There are many people on weekends, after school or after work, especially on weekends. But usually we have to go ahead of time. Monday is a closed day, usually 9 o'clock opening
4. You can bring water in. As for food, you can eat it occasionally. Don't affect other people. Although it is not advocated, people who go to the library every day and eat fast food outside every day are really more expensive
5. When you leave and come back at noon, there are usually no seats left, so at noon, you can see that many positions are dominated by books and bags. This kind of behavior is not advocated, but it is very effective
6. Other places are generally libraries. I like Shenzhen Library best because of its good environment.

6. The shops in the creative park of overseas Chinese town, or some small capital bookstores.

7. Unknown_Error

8. It's normal to delay for three days. It's double eleven. I also have several express delivery delays.

9.

Wrong model, OM3 and OM4

"om" standard for optical multi-mode, which means multimode optical fiber standard, is the standard of multimode optical fiber grade. The bandwidth and maximum distance of different levels of transmission are different. The differences between them are analyzed from the following aspects

Om1

refers to 50 um or 62.5 um core diameter multimode fiber with 850 / 1300nm full injection bandwidth over 200 / 500MHz. Km

2, om2

refers to 50 um or 62.5 um core diameter multimode fiber with 850 / 1300nm full injection bandwidth above 500 / 500MHz. Km

3, OM3

are 50um core diameter multimode fibers optimized by 850nm laser. In 10Gb / s Ethernet with 850nm VCSEL, the optical fiber transmission distance can reach 300m

4, OM4

are the upgraded versions of OM3 multimode optical fiber, and the optical fiber transmission distance can reach 550m

type fiber diameter μ m) Fiber type 1 Gigabit Ethernet 1000base-sx 1 Gigabit Ethernet 1000base-lx 10Gbps Ethernet 10GBASE 40Gbps Ethernet 40gbase Sr4 100gbps Ethernet 100gbase Sr4

om1 62.5/125 multimode 275m 550m 33m not supported

om2 50 / 125 multimode 550m 550m 82m not supported

OM3 (laser optimization) 50 / 125 multimode 550m 550m 300m100m (Sr4) 100m (Sr4)

OM4 (laser optimization) 50 / 125 multimode 550m 550m 400m150m (Sr4) 150m (Sr4)

single mode 9 / 125 single mode 5km at 1310nm 5km at 1310nm 10km at 1310nm n / a n / a

1 The traditional om1 and om2 multimode optical fibers are based on LED (light emitting diode) in standard and design, while OM3 and OM4 are optimized on the basis of om2 to make them suitable for the transmission of LD (laser diode) at the same time

Compared with om1 and om2, OM3 has higher transmission rate and bandwidth, so it is called optimized multimode fiber or 10 Gigabit multimode fiber

3 and OM4 are further optimized on the basis of OM3 and have better performance

Om1: larger core diameter and numerical aperture, stronger light collecting ability and bending resistance

Om2: the core diameter and numerical aperture are relatively small, which effectively reces the mode dispersion of multimode fiber, significantly increases the bandwidth and reces the fabrication cost by 1 / 3

OM3: flame retardant skin can prevent flame spread, smoke, acid gas and toxic gas emission, and meet the needs of 10Gb / s transmission rate

OM4: developed for vscel laser transmission, its effective bandwidth is more than twice that of OM3

the appearance of om1, om2, OM3, OM4 and om5 optical fiber jumpers

1, om1 and om2 have been widely deployed in buildings for many years, supporting the maximum value of 1GB Ethernet transmission

2, OM3 and OM4 optical cables are usually used in the cabling environment of the data center, supporting 10g or even 40 / 100g high-speed Ethernet transmission

OM3 optical fiber is designed to work with VCSEL, which conforms to the OM-3 optical fiber specification of ISO / iec11801-2nd and meets the requirements of 10 Gigabit Ethernet applications. There are many types of OM3 fiber, including indoor type, indoor / outdoor versatility, etc. the number of fiber cores ranges from 4 to 48. It also supports all applications based on the old multimode 50 / 125 fiber, including LED light source and laser light source

The transmission distance of Gigabit Ethernet using OM3 fiber system can be extended to 900 meters, which means that when the distance between buildings exceeds 550 meters, users do not need to use expensive laser devices

2. The standard 62.5/125 can be used in all situations within the oc-12 (622Mb / s) speed range within 2000 meters μ M multimode fiber, in addition to the use of single-mode fiber. However, the emergence of OM3 multimode fiber has changed this situation. Because OM3 fiber can improve the transmission distance of Gigabit and 10 Gigabit systems, using 850nm wavelength optical mole with VCSEL will be the most cost-effective routing scheme

3. When the link length exceeds 1000m, single-mode fiber is still the only choice at present. Single mode fiber can achieve 5km transmission distance at 1310nm wavelength in Gigabit system and 10km transmission distance in 10g system

When the link length is less than or equal to 1000m, om350 can be used in Gigabit system μ In the 10 Gigabit system, the single-mode fiber should be used

When the link length is less than 300 meters, OM3 multimode fiber can be used in any Gigabit and 10 Gigabit system

The bandwidth of single-mode fiber is much higher than that of multi-mode fiber because there is no problem of inter mode dispersion. Moreover, with the upgrading of the instry, the cost of single-mode optical fiber system has been greatly reced. In the system design, single-mode optical fiber is given priority to multi-mode optical fiber. In the past, the environment using OM3 or OM4 can be completely replaced by single-mode optical fiber