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Updated 12/23/2011: Corrected thermal pad info. Added V1 2 stream retest charts.
Maximum Performance Dual-Band N N900 Router
At a glance
ProductLinksys Maximum Performance Dual-Band N N900 Router (Linksys E4200V2)   [Website]
SummaryMarvell-based dual-band, dual-radio N router with Gigabit ports, USB drive sharing/media serving and three-stream N (450 Mbps) support on both bands. Same router as Linksys EA4500.
Pros• 20+ MB/s file sharing
• Gigabit ports
Cons• Half-fast FAT32 file writes
• Can't block outbound service (port) access
• Possible reduced range for 2.4 GHz dual-stream clients

Typical Price: $90  Buy From Amazon

When I started getting requests to review the V2 version of Cisco's top-of-line Linksys E4200 router [reviewed], I didn't give them much thought. Unless manufacturers really mess things up, most product revisions are more focused on cost reduction than new features or improved performance. So re-reviews aren't really worth the effort.

So I was surprised when I checked with Cisco and found that the E4200V2 is actually a new product, with a complete redesign. I'll leave why Cisco chose to not give the V2 its own E-series number up to their marketing wizards, but it's bound to cause some consumer confusion. Or wait, maybe that's the goal?

At any rate, Cisco tells me they will continue to sell the original E4200 (with an MSRP lowered to $179.99), which I'll refer to as "V1", along with the V2. So be sure you enter E4200V2 when you go Googling for it...

From the outside, the V1 and V2 are identical, even down to the same Linksys E4200 (without "V2") on the front nameplate. The back panel (shown below) is the same too, with all the same ports and switches. I'm surprised that Cisco didn't upgrade the USB port to 3.0. From the drive-sharing performance I saw, the V2 might be able to use USB 3.0's extra bandwidth (more later).

Rear panel

Rear panel

Internal Details

Forum posts had already given me the heads-up that the V2 is based on Marvell silicon. And that's what I found when I opened up my review sample after testing was done. Without further ado, here's a comparison of the key components in the V2 and the original.

  E4200V2 E4200
CPU 1.2 GHz Marvell Processor
(MRVL F6101AW 1114AA C120)
Broadcom BCM4718 802.11n
Simultaneous dual-band router SoC
Switch Marvell 88E6171R
7 port Gigabit
Broadcom BCM53115
5 port Gigabit
RAM 128 MB 64 MB
Flash 128 MB 16 MB
2.4 GHz Radio - Marvell 88W8063 / 88W8366
- SiGe SE2598L 2.4 GHz P.A. (x3)
- In Broadcom BCM4718
- SiGe SE2528L P.A. (x2)
5 GHz radio - Marvell 88W8063 / 88W8366
- SiGe SE2567L 5 GHz P.A. (x3)
- Broadcom BCM4331 dual-band 802.11n SoC
- SiGe SE2594L Dual-band front ends (x3)
Table 1: E4200V2 and E4200 component summary

The V2 is definitely a beefier design than the V1 since it has a separate 1.2 GHz CPU vs. the V1's shared (with the 2.4 GHz radio) CPU and much more RAM and flash. I'm not sure exactly what the V2's processor is, other than it is made by Marvell. So I've provided the numbers I found etched on the CPU and perhaps one of our helpful readers will enlighten us.

The same two-device radio (88W8063 Dual-band 3x3 MAC/BB and 88W8366 Dual-band 3x3 MIMO transceiver) is used for both radios, with the difference being the SiGe power amplifiers, which are different for each band. Note that SiGe power amplifiers (P.A.) and RF front-ends were also used in the V1.

The Marvell 88W8063 / 88W8366 aren't new devices. They first appeared in the Apple Airport Extreme back in 2009 and more recently in D-Link's DIR-665. Apple switched to Broadcom's BCM4331 for the Gen 5 Extreme and it's also the 5 GHz radio in the E4200V1.

The photo below shows a very clean and largely symmetrical design. The 5 GHz radio is on the left and the 2.4 on the right. Antenna placement is not symmetrical, with the 2.4 GHz radio's antennas more tightly clustered than the 5's.

Linksys E4200V2 inside view

Linksys E4200V2 inside view
Updated 12/23/2011

Popping off the RF can tops revealed the mostly-Marvell innards seen in the photo below. The CPU, RAM and switch were thermally coupled to the top of the RF enclosure via thermal pads that were removed for the photo. The switch chip (right side) was not thermally coupled. The thermal pads don't seem to have much work to do; the router didn't generate much heat at all, especially when idle.

Linksys E4200 board

Linksys E4200V2 board

A closeup of the V1's board is shown below for your reference. Refer to the original review for more commentary.

Linksys E4200 inside view - shields removed

Linksys E4200 inside view - shields removed

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