# 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


### 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:

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)


## 2 Switch

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

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