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VMG1312 Vs VMG3925: Difference between revisions

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Thais page describes the differences between the ZyXEL VMG1312-B10D and the ZyXEL VMG3925-B10B routers.
Thais page describes the differences between the ZyXEL VMG1312-B10D and the ZyXEL VMG3925-B10B routers.


==The main differences are:==
==The main differences are==
*VMG3925 is more expensive
*VMG3925 is more expensive
*VMG3925 has 2.4 and 5G WiFi radio, the VMG1312 has only 2.4G
*VMG3925 has 2.4 and 5G WiFi radio, the VMG1312 has only 2.4G
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In terms of hardware differences between the router:
In terms of hardware differences between the router:


The main difference, is the addition of an additional 5GHz wireless
The main difference, is the addition of an additional 5 GHz wireless
radio alongside the existing 2.4GHz band one. This is of benefit to
radio alongside the existing 2.4 GHz band one. This is of benefit to
customers in areas where the 2.4GHz band is heavily congested.
customers in areas where the 2.4 GHz band is heavily congested.


5GHz does NOT have a "longer reach" than 2.4GHz, so it will not help in cases of signal attenuation.
5 GHz does NOT have a "longer reach" than 2.4 GHz, so it will not help in cases of signal attenuation.
It does however help in cases where the 2.4GHz band has too many other devices on it.
It does however help in cases where the 2.4 GHz band has too many other devices on it.


It's believed that the VMG3925 has an extra common-mode noise filter on the telephone line.
It's believed that the VMG3925 has an extra common-mode noise filter on the telephone line.
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| CPU Cores|| 2 || 2
| CPU Cores|| 2 || 2
|-
|-
| CPU Frequency || 600MHz || 400MHz
| CPU Frequency || 600 MHz || 400 MHz
|-
|-
| RAM || 64MB || 128MB
| RAM || 64MB || 128MB
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| Flash || 128MB|| 128MB
| Flash || 128MB|| 128MB
|-
|-
| Switch chipset || Onboard the BCM63381 SoC ||[https://www.broadcom.com/products/ethernet-connectivity/switching/roboswitch/bcm53125/ BCM53125](Discrete)
| Switch chipset || On board the BCM63381 SoC ||[https://www.broadcom.com/products/ethernet-connectivity/switching/roboswitch/bcm53125/ BCM53125](Discrete)
|-
|-
| LAN Ethernet || 4 Ports 10/100M <br/>(To SoC)||4 Ports 10/100/1000M <br/> (To Switchchip)
| LAN Ethernet || 4 Ports 10/100M <br/>(To SoC)||4 Ports 10/100/1000M <br/> (To Switchchip)
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| Wireless Protocols || 802.11 b/g/n || 802.11 a/b/g/n/ac
| Wireless Protocols || 802.11 b/g/n || 802.11 a/b/g/n/ac
|-
|-
| 2.4GHz Wireless || Yes || Yes
| 2.4&nbsp;GHz Wireless || Yes || Yes
|-
|-
| 2.4GHz radio chains || 2 || 2
| 2.4&nbsp;GHz radio chains || 2 || 2
|-
|-
| 2.4GHz chipset || [https://www.broadcom.com/products/wireless/wireless-lan-infrastructure/bcm43224 BCM43227] (Discrete) || [https://www.broadcom.com/products/broadband/xdsl/bcm6362 BCM6362] (On BCM63168 SoC)
| 2.4&nbsp;GHz chipset || [https://www.broadcom.com/products/wireless/wireless-lan-infrastructure/bcm43224 BCM43227] (Discrete) || [https://www.broadcom.com/products/broadband/xdsl/bcm6362 BCM6362] (On BCM63168 SoC)
|-
|-
| 5GHz Wireless || No || Yes
| 5&nbsp;GHz Wireless || No || Yes
|-
|-
| 5GHz radio chains || N/A || 3
| 5&nbsp;GHz radio chains || N/A || 3
|-
|-
| 5GHz chipset || N/A ||[https://www.broadcom.com/products/wireless/wireless-lan-infrastructure/bcm4360 Broadcom BCM43602] (Discrete)<br/>[http://www.skyworksinc.com/Product/1791/SKY85712-21 SKY85712-21 ]RF Front-End
| 5&nbsp;GHz chipset || N/A ||[https://www.broadcom.com/products/wireless/wireless-lan-infrastructure/bcm4360 Broadcom BCM43602] (Discrete)<br/>[http://www.skyworksinc.com/Product/1791/SKY85712-21 SKY85712-21 ] RF Front-End
|-
|-
| xDSL Chipset || Broadcom BCM6303 ADSL/VDSL || Broadcom BCM6302 ADSL/VDSL
| xDSL Chipset || Broadcom BCM6303 ADSL/VDSL || Broadcom BCM6302 ADSL/VDSL
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You may note that the VMG3925-B10B has a slower CPU, however it also contains more dedicated hardware for packet processing compared to the VMG1312-B10D which needed the extra CPU clock cycles to deal with processing packets.
You may note that the VMG3925-B10B has a slower CPU, however it also contains more dedicated hardware for packet processing compared to the VMG1312-B10D which needed the extra CPU clock cycles to deal with processing packets.


The VMG3925-B10B's SoC contains 1 Gigabit PHY, which connects to the Switch chip for the WAN and LAN ports. Radios are connected to the SoC, so packets passing through WAN/LAN<>WLAN would be limited to the bandwidth of the single Gigabit PHY inside assuming no other limiting factors ie WAN speed, WLAN radio bandwidth.
The VMG3925-B10B's SoC contains 1 Gigabit PHY, which connects to the Switch chip for the WAN and LAN ports. Radios are connected to the SoC, so packets passing through WAN/LAN<>WLAN would be limited to the bandwidth of the single Gigabit PHY inside assuming no other limiting factors i.e. WAN speed, WLAN radio bandwidth.


[[Category:AA Routers]]
[[Category:AA Routers]]
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