---
# System prepended metadata

title: Select computer \#2
tags: [purchase]

---

# Select computer \#2

1. Regarding Computer

## 1 Regarding Computer

### 1.1 Basically, the new one is the same as the previous one

Some component cost up

![](https://imgur.com/PTRC6Ld.png)

### 1.2 Difference

#### 1.2.1 MotherBoard

C8H -> C8H dark
12k NT -> 15k NT
With fan on MB -> Without fan on MB, but

##### Reason 1: C8H has discontinued

##### Reason 2: C8H dark has better per VRM(Voltage Regulator Module): <br> 60A per VRM -> 90A per VRM 


#### 1.2.2 Graphical card

RX570 -> GT710 ---- Downgrade why?????????

#### 1.2.2 Graphical card

##### Reason 1: Multiple monitor and low cost (NT:2000)

[Refer to here](https://tinyurl.com/y4qf6ynt )

Limited:

##### Tables: Quality of multy monitor and resolution

* 1, 2, 4 -> count of monitor
* e -> excellent
* o -> ok
* x -> not recommend

|   | 1 | 2 | 4 | 
|---|---|---|---|
|FHD| e | e | e |
|2K | e | e | o |
|4K | e | o | x |

|                |   e   |   o   |   x   | 
|----------------|-------|-------|-------|
| resolution     |   8   |   8   |   8   |
| frame rate (Hz)|  60   |   60  |   30  |
| Y:Cr:Cb        | 4:4:4 | 4:2:0 | 4:2:0 |



##### Reason 2: This card has *pcie-x1*

Almost all of VGA cards use pcie-x16.
In the commerical MB,
if we apply 2 pcie-x16 card,
e.g. (VGA card) + (Xilinx Alveo card),
then bandwidth of pci-e will be shared (x16 -> x8 + x8)
see: 
![](https://imgur.com/8McD0KB.png)

Fortunately, 
We can use pci-e x1 VGA card to avoid this problem.
Unfortunately, 
has some exception : [ASUS WS-x570-ace](https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM4/Pro_WS_X570-ACE/T15611_Pro_WS_X570-ACE_UM_V2_WEB.pdf) 

![](https://imgur.com/WcZj3eN.png)

## 2 Switch

https://24h.pchome.com.tw/prod/DRAF2J-A9006IV3W?fq=/S/DRAF0I

###### tags: `purchase` `DeWei