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[FurryNutz]

What wireless modes are you using?
Try single mode G or mixed G and N?
What security mode are you using? Preferred security is WPA-Personal. WPA2/Auto TPIK and AES.
What wireless devices do you have connected?
Any cordless house phones?
Any other WiFi routers in the area? Use InSSIDer to find out. Try setting manual channel from Auto scan.
Turn off Short GI and Extra Wireless Protection if you have it. Under Advanced/Advanced Wireless.

[dww]

settings on DIR-655 (h/w:B1,f/w:2.03NA)
Wireless modes:   mixed G/N (old smartphone still uses G)
Security mode:    WPA-Personal, Auto(WPA/WPA2), AES
Devices:             laptop, tablet, iPod, smartphone
Cordless phones:  Yes*
Other routers:      Yes* (using Auto scan)
Channel width:     20/40
WAN port speed:   10/100/1000 Auto

Advanced DNS     OFF
DNS relay            ON
QOS engine         disabled
WLAN partition     OFF
WMM enable        ON
Short GI             OFF
Don't see an "extra Wireless protection" setting

*these shouldn't matter, since they're the same for both routers

I actually have the 655 and the 615 side-by-side on my desk, with only one powered up at a time.
I compared the signal % and the rates on the Status/Wireless router screens.
I made no changes to adapter settings on any clients.

The net result was poorer results with the 655 than with the 615.
The laptop showed a 100% signal both times, but it got up to 270M using the 615 and only hit 160M with the 655 - and fell back to 78-104M

I've been a loyal and happy DLink user for quite some time, so I'm truly baffled as to why I seem to be getting poorer connections with a setup that should produce stronger connections.

[FurryNutz]

What is the frequency of the cordless phones, if 2.4Ghz, they can interfere sometimes.
Try manual channel
Any other WiFi routers in the area? Use InSSIDer to find out.

[dww]

Sorry, wasn't thinking...
The phones are DECT 6, so they really shouldn't be an issue.

As far as other routers, there are a number of others I can see in the DLink Site survey.
But the routers are only a foot apart, so they're both facing the same interference profile.
Both routers are connecting to the same client adapters.
And both routers are N-band routers.
Why would the newer and supposedly more powerful one actually show worse performance?
Is the 655 more sensitive to interference than the 615?

I only decided to get the 655 because the last adapter I bought was the Xtreme N version.
I'd better check the receipt and see how long I can wait before returning the 655.
I wasn't *really* unhappy with the 615, just had a problem with occasional connection loss.
I can live with the occasional reboot of the router, given that the speeds are better.

I've tried to set up my testing so I could isolate the differences between the two scenarios.
The only difference I'm aware of are the routers (and of course, the firmware and the settings)
I've verified that all the major settings were the same - except for ones that aren't on both routers.

Maybe the antennas are different.
About the only thing I haven't tried is swapping the antennas between routers....

[thecreator]

Sorry, wasn't thinking...
The phones are DECT 6, so they really shouldn't be an issue.

As far as other routers, there are a number of others I can see in the DLink Site survey.
But the routers are only a foot apart, so they're both facing the same interference profile.
Both routers are connecting to the same client adapters.
And both routers are N-band routers.
Why would the newer and supposedly more powerful one actually show worse performance?
Is the 655 more sensitive to interference than the 615?

I only decided to get the 655 because the last adapter I bought was the Xtreme N version.
I'd better check the receipt and see how long I can wait before returning the 655.
I wasn't *really* unhappy with the 615, just had a problem with occasional connection loss.
I can live with the occasional reboot of the router, given that the speeds are better.

I've tried to set up my testing so I could isolate the differences between the two scenarios.
The only difference I'm aware of are the routers (and of course, the firmware and the settings)
I've verified that all the major settings were the same - except for ones that aren't on both routers.

Maybe the antennas are different.
About the only thing I haven't tried is swapping the antennas between routers....

Hi dww,

Read the sticky above for 300 Mbps connections.

http://forums.dlink.com/index.php?topic=616.0

300 Mbps connection requirements! Please read!

" If you are using encryption the router must be configured to use AES cipher. In some firmware versions/models, the only way to get the AES cipher is to run WPA2. If you can not select the Cipher, selecting WPA2 only will force this cipher type. "

[dww]

Don't mean to sound like a broken record, but I'm using the same adapters in both cases.  To be specific, I'm using the same DLink DWA-652 card with 2 separate DLink N routers; and getting better sustained speeds with the older and supposedly lower powered one.  So based on what you're saying, maybe the newer router requires AES to hit 300, but the older one doesn't.

Like I said before, I'm a long-time DLink customer, so this most likely won't change my brand loyalty.  It's just an odd outcome based on my expectations.

[FurryNutz]

For the newer routers and next gen routers, to reach 300Mb connections, N only and AES only is required.

It's all detailed in the 300Mb connection sticky.

[thecreator]

Don't mean to sound like a broken record, but I'm using the same adapters in both cases.  To be specific, I'm using the same DLink DWA-652 card with 2 separate DLink N routers; and getting better sustained speeds with the older and supposedly lower powered one.  So based on what you're saying, maybe the newer router requires AES to hit 300, but the older one doesn't.

Like I said before, I'm a long-time DLink customer, so this most likely won't change my brand loyalty.  It's just an odd outcome based on my expectations.

Hi dww,

You did not read the sticky.

"3) The channel width needs to be set to 20/40Auto, if it is not, the adapter will report a connection speed of 130Mbps. This is a feature that was added for compatibility with Intel 802.11N adapters, as they only operate on a channel width of 20.  "

Also "Also if you have issues with mixed mode, try locking the 802.11Mode to either 802.11N Only or 802.11G/N. "

In other words, having a Mixed Mode of 802.11n and 802.11g will also work. That's the way, mine works.