100meg speed spikes?

[darkrage]

what could cause this

Sat, 18 Jun 2011 15:42:42 GMT

Test 1: 2048K took 31 ms = 66064.5 KB/sec, approx 528516 Kbps, 516.13 Mbps
Test 2: 2048K took 24 ms = 85333.3 KB/sec, approx 682666 Kbps, 666.67 Mbps
Test 3: 2048K took 23 ms = 89043.5 KB/sec, approx 712348 Kbps, 695.65 Mbps
Test 4: 4096K took 1006 ms = 4071.6 KB/sec, approx 32573 Kbps, 31.81 Mbps

even on speedtest it spikes back and forth over 150 - 600Mbps and ends up as 20~ 30Mbps avg?

http://www.speedtest.bbmax.co.uk/results.php?t=1308412076&v=13068433

http://www.speedtest.bbmax.co.uk/results.php?t=1308412143&v=13068452

from news groups i am getting erratic speeds also - from 2Mbps to 5Mbps

here is my dl settings

Frequency 306750000 298750000 314750000 322750000
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y Y/Y/Y
Channel Id 144 143 145 146
Modulation 256QAM 256QAM 256QAM 256QAM
Symbol Rate
(Msym/sec) 6.952 6.952 6.952 6.952
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level
(dBmV) 2.65 2.23 2.43 2.79
RxMER
(dB) 36.84 37.09 37.09 37.36
Correctable
Codewords 18523 102217 1760 45
Uncorrectable
Codewords 286 303 300 915

and my settings

Network Access : Allowed
Maximum Number of CPEs : 1
Baseline Privacy : Enabled
DOCSIS Mode : DOCSIS 3.0
Config File : V255cfe22fbb0666b.cm
Primary Downstream Service Flow
SFID : 24647
Max Traffic Rate : 102400000 bps
Max Traffic Burst : 10000 bytes
Min Traffic Rate : 0 bps
Primary Upstream Service Flow
SFID : 25477
Max Traffic Rate : 10250000 bps
Max Traffic Burst : 16320 bytes
Min Traffic Rate : 0 bps
Max Concatenated Burst : 16320 bytes
Scheduling Type : Best Effort

any ideas? I also have a 6db attenuator attached - VMNG300 modem and a netgear router.

[TJS]

It really depends on the server and the load on the serve at the time; considering a majority servers (how many times can i say server in 1 sentence) Only have 100 mb connections them selves; So if a few people with say 2 - 5 mb/s are testing at the same time thatll knock 30 mb/s off straight away :)

[General Maximus]

same as what TJS said, the best way to test something like this is to do a sustained transfer on something like newsgroups or torrents when you know you should get 100mbit and then see what you actually get. Doing a few mb off one server isn't a reliable test.

[darkrage]

Test 1: 2048K took 34 ms = 60235.3 KB/sec, approx 481882 Kbps, 470.59 Mbps
Test 2: 2048K took 24 ms = 85333.3 KB/sec, approx 682666 Kbps, 666.67 Mbps
Test 3: 2048K took 23 ms = 89043.5 KB/sec, approx 712348 Kbps, 695.65 Mbps
Test 4: 4096K took 59 ms = 69423.7 KB/sec, approx 555390 Kbps, 542.37 Mbps

Overall Average Speed = approx 608072 Kbps, 593.82 Mbps

ok I did state my newsgroup speed was erratic and is constantly slower than when i was on 50meg - i was getting on 50 5.9Mbps on average but now its more like 2.2 ~ 5.5 Mbps.

so there is definately something wrong somewhere?

[TJS]

What firewall software are you using

[General Maximus]

weird, what type of NIC have you got? Is it 100mbit or gigabit?

[darkrage]

I have a netgear WNR2000 router which has a built in firewall and im using the VMNG300 Modem with 100Mb settings - the first day installed it was slow not much faster than my 50Mb line but it was erratic then rarely above 5.9 best speed is in my sig but ive never had that sort of speed from newsgroups it just seems weird.

My Network Interface Controller is an onboard gigabyte 1000Mbps

Gigabit LAN connectivity
The Gigabit network interface delivers a high speed LAN connection with data transfer rate up to 1000Mb/s, providing new generation connectivity for the broadband era. Gigabit LAN is ideally for seamless internet connection such as streaming audio and video contents.

[qasdfdsaq]

What firewall software are you using
Software.

You probably have Kaspersky.

[darkrage]

good guess - didnt even think of that having a built in firewall - just uninstalling now back to avg i go =)

will post results after change

[qasdfdsaq]

I'm not sure why you'd choose to go to an inferior antivirus product just to make sure you get worse speedtest results...

[TJS]

I use comodo firewall on my netbook and it doesn't seem to skew the results and it doesnt really slow down the computer much even with the intel atom cpu :)

don't use anything on the macs other then the built in firewall

[darkrage]

I had only recently installed kaspersky and didnt even realise it was firewalling ports so I have deleted it and reinstalled AVG - now my speeds are back to normal depending on time of day.

Newsgroups are now pulling 9.7Mbps with a little fluctuation

speedtest results are still showing an inferior connection but the spectrum is more stable as it tests - so thankj you for pointing out kaspersky is crap =)

AVG has done me ok as my system is clean so no reason to use anything else.