I am experiencing some relatively bad download performance with the XPS 15 9570. i highly doubt it is the Killer 1535, since i am getting much better download performance, with the same upload performance as my older MSI GS60 with a Killer 1525 card. I have gigabit internet, and its a real shame i can barely use the download speed that should be accessible.
Here are the speed tests i have done with their respective results on both machines (I also included a Dell Precision 3520 with an Intel 8265 wifi card):
I should be able to get much more download performance than what I am currently getting, with the existing Killer 1535 card. All devices were updated (drivers and windows) prior to the speed test. All devices are running Windows 10, were tested in the exact same spot, testing was done sequentially, only using 5GHz band, no other computer was taking up bandwidth. Router is an ASUS RT-AC66U. The slow speed is especially annoying because i have an SMB2 storage server, and transferring files takes 2-3 times as long as the other 2 machines. Also, i posted the best result for each computer, but the XPS 15's wifi downstream performance is inconsistent. Most of the time, i get under 200mbps.
I'm half tempted to take the Killer 1525 out of my MSI GS60 and put it in the XPS 15 9570 to see what happens :/
EDIT: i would also like to add, since Killer wifi cards seem to have a bad name for themselves, for the 4 years i have owned the MSI GS60, i have not had a single issue with the Killer 1525. It has always performed very well and reliably so.
Thanks for posting. Apologies that your system is not performing as expected.
Here is a post from the Forum with reps from killer networking responding that may be helpful.
If the system is under warranty, please contact me privately. Be sure to include your personal information (name, address, telephone, email) and your computer's service tag number in your message. Thanks.
If there is no warranty, then you could contact our Out of Warranty team to get a quote for a paid service call -http://dell.to/1vnT6CQ
Thanks for responding to this old post. Apologies that your system is not performing as expected.
Please run the systems diagnostics like Dell SupportAssist, make a note of any error messages and post back. If there are none, then it could indicate either a software or driver issue. Sometimes just removing the driver, shutting down the computer, then turning it back on and letting the native drivers reinstall helps.
Here is information from the Dell Knowledge base you may find helpful:
If you still require assistance and the system is under warranty, you may contact me privately. Be sure to include your personal information (name, address, telephone, email) and your computer's service tag number in your message. Thanks.
If there is no warranty, then you could contact our Out of Warranty team to get a quote for a paid service request.