More info:

RB433L

The RB433L has three miniPCI slots and three Ethernet ports - it's low-cost version of popular RB433 model.

Use this device in an outdoor case for a sector AP installation, or for a wireless backhaul. Three ports give you plenty of configuration options for many wireless scenarios.

It’s powered by an Atheros 300MHz CPU and has 64MB of RAM and a Level4 RouterOS license.

Product specifications

Details
Product code	RB433L
CPU speed	300MHz
RAM	64MB
LAN ports	3
Gigabit	No
MiniPCI	3
Power Jack	No
802.3af support	No
PoE	8-28V DC on Ether1
Voltage Monitor	Yes
CPU temperature monitor	No
PCB temperature monitor	No
Dimensions	105 mm x 154 mm
Operating System	RouterOS
RouterOS License	L4
Current Monitor	No
CPU	AR7130

RB4xx Series @300Mhz (Ethernet only test)			64 byte frames		512 byte frames		1518 byte frames
IP Firewall	Conntrack	Mode	Mbps	Fps	Mbps	Fps	Mbps	Fps
off	off	Bridging	43.26	84500	199.48	48700	199.16	16400
on	off	Routing	28.26	55200	199.48	48700	199.16	16400
on	off	Bridging	25.19	49200	188.42	46000	199.16	16400
on	on	Routing	21.81	42600	167.12	40800	199.16	16400
on	on	Bridging	18.48	36100	135.17	33000	199.16	16400

All throughput tests done with Xena Networks specialized test system and RouterOS v5, according RFC2544, with Ethernet frame sizes 64, 512, 1518 bytes.
Each board is tested with specified number of Ethernet interfaces, to ensure optimal load on hardware.
Values in Italics indicate that the maximum possible throughput was reached, limited only by ethernet ports themselves.
Test results show device maximum performance, and are reached using optimal hardware and software configuration, different configurations most likely will result in lower results.