Very Slow IPv4 upload rates... and a fix!

xBruce88x · Dec 18, 2014

I've been having trouble with this for a few days now and finally found a fix... stumbled across it on another site and thought i'd share it.

Post/message 10 from http://forums.comcast.com/t5/Basic-...-And/Very-slow-IPv4-upload-speed/td-p/1984229

Solved the problem, it was not a cable issue at all but a setting on the network adapter, an Atheros AR8161/8165 PCI-E Gigabit ethernet controller.

Changed two settings in the advanced configuration:

Large Send Offload (IPv4) Enabled => Disabled

Large Send Offload v2 (IPv4) Disabled => Enabled

Now IPv4 and IPv6 speeds are identical and I only see the one result in the Xfinity Speed Test. This was a newish HP desktop running 64bit Windows 7 Home Premium. Apparently the default adapter settings no longer worked after the IPv6 rollout.

I doubt I'll be the only person to experience this problem. I reached a great 2nd level Comcast support person who took a lot of time to narrow down the issue to the PC but couldn't resolve it. I finally figured it out but have no way to get it back to him so I'm documenting it here.

It also worked for my Killer e2200 network adapter. Before I switched these settings i was getting horribly slow upload rates. Now I'm getting more respectable results.

Went from this...

to this...

OneMoar · Dec 20, 2014

Odd most NIC's default offloading to enabled strange yours was disabled

xBruce88x · Dec 21, 2014

yea i'm guessing it has something to do with the "Killer" networking software maybe? Either way i've got it working now. I removed the killer app and just have the base driver along with that setting in place.

Asylum · Dec 21, 2014

Kool, glad you got it sorted. :toast:

xBruce88x · Dec 27, 2014

I guess not many ppl have had this issue lol. Must be an Athros thing I suppose... or a "Killer NIC" thing

System Name	Old Gateway / Steam Deck OLED LE
Processor	i5 4440 3.1ghz / Jupiter 4c 8t
Motherboard	Gateway / Valve
Cooling	Eh it doesn't thermal throttle
Memory	2x 8GB JEDEC 1600mhz DDR3 / 16gb DDR5 6400
Video Card(s)	RX 560D 4GB / Navi II 8CU
Storage	240gb 2.5 SSD / 1TB nvme
Display(s)	Dell @ 1280*1024 75hz / 800p OLED
Case	Gateway / Valve LE
Audio Device(s)	Gateway Diamond Audio EMC2.0-USB 5375U ($15 a long ass time ago), Valve
Power Supply	380w oem / 65w valve USB-C
Mouse	Purple Walmart special, 1600dpi. Black desk mat
Keyboard	SteelSeries Apex 100 / virtual
VR HMD	Lmao
Software	Windows 10 / Steam OS
Benchmark Scores	It can run Crysis (Original), Doom 2016, and Halo MCC. SD LE 45fps

System Name	RPC MK2.5
Processor	Ryzen 5800x
Motherboard	Gigabyte Aorus Pro V2
Cooling	Enermax ETX-T50RGB
Memory	CL16 BL2K16G36C16U4RL 3600 1:1 micron e-die
Video Card(s)	GIGABYTE RTX 3070 Ti GAMING OC
Storage	ADATA SX8200PRO NVME 512GB, Intel 545s 500GBSSD, ADATA SU800 SSD, 3TB Spinner
Display(s)	LG Ultra Gear 32 1440p 165hz Dell 1440p 75hz
Case	Phanteks P300 /w 300A front panel conversion
Audio Device(s)	onboard
Power Supply	SeaSonic Focus+ Platinum 750W
Mouse	Kone burst Pro
Keyboard	EVGA Z15
Software	Windows 11 +startisallback

System Name	Old Gateway / Steam Deck OLED LE
Processor	i5 4440 3.1ghz / Jupiter 4c 8t
Motherboard	Gateway / Valve
Cooling	Eh it doesn't thermal throttle
Memory	2x 8GB JEDEC 1600mhz DDR3 / 16gb DDR5 6400
Video Card(s)	RX 560D 4GB / Navi II 8CU
Storage	240gb 2.5 SSD / 1TB nvme
Display(s)	Dell @ 1280*1024 75hz / 800p OLED
Case	Gateway / Valve LE
Audio Device(s)	Gateway Diamond Audio EMC2.0-USB 5375U ($15 a long ass time ago), Valve
Power Supply	380w oem / 65w valve USB-C
Mouse	Purple Walmart special, 1600dpi. Black desk mat
Keyboard	SteelSeries Apex 100 / virtual
VR HMD	Lmao
Software	Windows 10 / Steam OS
Benchmark Scores	It can run Crysis (Original), Doom 2016, and Halo MCC. SD LE 45fps

System Name	KILLER
Processor	Intel Core i7 4790K
Motherboard	MSI Z87 G45 Gaming
Cooling	Water Cooling
Memory	2x8GB Gskill 2400mhz
Video Card(s)	EVGA GTX 980
Storage	SSD Samsung 500GB
Display(s)	24" Asus 144hz
Case	Cooler Master HAF
Audio Device(s)	X-Fi Platinum
Power Supply	Antec 1200 Watt Modular
Software	Windows 10 64 Bit
Benchmark Scores	3DMark Vantage 51342

System Name	Old Gateway / Steam Deck OLED LE
Processor	i5 4440 3.1ghz / Jupiter 4c 8t
Motherboard	Gateway / Valve
Cooling	Eh it doesn't thermal throttle
Memory	2x 8GB JEDEC 1600mhz DDR3 / 16gb DDR5 6400
Video Card(s)	RX 560D 4GB / Navi II 8CU
Storage	240gb 2.5 SSD / 1TB nvme
Display(s)	Dell @ 1280*1024 75hz / 800p OLED
Case	Gateway / Valve LE
Audio Device(s)	Gateway Diamond Audio EMC2.0-USB 5375U ($15 a long ass time ago), Valve
Power Supply	380w oem / 65w valve USB-C
Mouse	Purple Walmart special, 1600dpi. Black desk mat
Keyboard	SteelSeries Apex 100 / virtual
VR HMD	Lmao
Software	Windows 10 / Steam OS
Benchmark Scores	It can run Crysis (Original), Doom 2016, and Halo MCC. SD LE 45fps

Very Slow IPv4 upload rates... and a fix!

xBruce88x

OneMoar

There is Always Moar

xBruce88x

Asylum

xBruce88x