DGND3700v2 Signal latency to 27" iMac running OS Sierra 10.12.6

[tripod74]

First time poster, a bit naive on all this so please bear with me.

Purchased new iMac and new router in Jan 2014. The last several weeks I have been having big problems with internet connections. Painfully slow to load, intermittent unable to connect etc. Speed tests on other home devices (iPhone, iPad show acceptable DL speed of 6-7 mbs while regularly iMac shows less than 1 mps and often the test fails.

Have spent hours on calls with Apple and my IPS without success.

Could this be a wifi card problem?

Don't know where to turn - hope there is help in this Community. Thanks.

[antinode]

> First time poster, [...]

   And second and third, too, apparently.  Once should be enough.

> Could this be a wifi card problem?

   It could be.  What I'd want to try would be a different router, to
see if the problem sticks to the Mac.  Do you have a neighbor with a
guest network who's within range?  Or a trailer you could use to haul
this monster to the nearest coffee shop?  Or the Apple store?

> Speed tests on other home devices (iPhone, iPad show acceptable DL
> speed of 6-7 mbs while regularly iMac shows less than 1 mps and often
> the test fails.

   Sure sounds like a problem with the Mac.

[tripod74]

Thanks, antinode. Will try the alternative router and guest network solution before consigning the iMac to the back seat for a ride to the Apple Store.

And apologies for the triple posting. The lousy upload speed caused my frustration to hit the send button twice too often. Cheers.