Author: cimba007
Subject: B85M-ITX - NIC + CPU C6 = SLOW INTERNET
Posted: 03 Apr 2016 at 3:39am
Hello,
Edited by cimba007 - 7 minutes ago at 4:01am
Subject: B85M-ITX - NIC + CPU C6 = SLOW INTERNET
Posted: 03 Apr 2016 at 3:39am
Hello,
i recently purchased an B85M-ITX on ebay for cheap and got myself a G1840 Celeron in addition.
Both are working quite well .. but I still have some huge issues as soon as I enable energy saving features.
What I did so far:
- Update do BIOS 2.50
- Enable all C-State realated settings
- Enabled C6 Package C-State
So far so good .. my rig is runnig quite and smooth .. PC to PC network performance is remarkagble .. 110MB/s .. close to the theoretical gigabit cap ..
But then ...
Downloading stuff from the interweb is terrible slow
- I got a 35MBit connection (verified by other PCs in my household)
- .. changed network cables, switch, direct connection to the fritzbox ..
- Windows 10 32bit .. the same as Windows 8.1 64bit ..
- All NIC-driver versions I could find from 2.1.0.7 to 2.1.0.21
What did I obverseve:
- Default BIOS/UEFI .. no issues
- Enabling C-States .. slow Internet download .. fast Network transfer ..
- Switching from gigabit auto negotiation to 100Mbit full duplex .. no issues, Internet ~35mbit .. as it should be.
With slow internet download I mean ~3Mbit .. jumping eradically .. nothing solid ..
Switching from 2.50 to 2.40 got me 3-18Mbit .. but all far from stable ..
My guess is the C6 State and the integrated NIC are interfering terrible ..
I will try out to selectivly disable Package and CPU C-States to find the culprit .. still .. this is not acceptible ..
Edited by cimba007 - 7 minutes ago at 4:01am