hey MattOG and welcome to the forum

first we need to clean up abit

download Dr.Tcp http://www.dslreports.com/front/DRTCP021.exe

open it and make sure all setting is default, and erase every value you see ( use delete key ) all fields must be blank, now click apply and exit

open cablenut adjuster, click dlete cablenut tweaks and click save to registry

now reboot and make a new tweaktest and post result

VanBuren

There is a MTU problem, it might be your router giving you wrong MTU

bypass your router and connect direct to modem, make a new tweaktest and post result

VanBuren

set the MTU as high as possible

omg 5000 is too high, i thought it had a limit of 1500, well maybe router will auto adjust it down i dont know, if not you need to set it to 1500

run this analyzer instead http://forums.speedguide.net:8117/

copy all text and paste it here

VanBuren

1460 is probl the highest possible

manual set 1460 on your router and check speed

use 2992 KB test downstream and 1496 KB upstream, i will make a tweakfile for you

VanBuren

Ok, done the stuff requested.

Results below.


********************************
After 1460 & 512 Cablenut
********************************

::::::::::.. Upload Stats ..::::::::::
Connection is:: 243 Kbps about 0.2 Mbps (tested with 1496 KB)
Upload Speed is:: 30 kB/s
Tested From:: http://www.testmy.net/
Test Time:: Mon Feb 21 21:36:53 UTC 2005
Bottom Line:: 4X faster than 56K 1MB upload in 34.13 sec
Diagnosis: Looks Great : 3.85 % faster than the average for host (aol.com)
Validation Link:: http://testmy.net/id-SZNV64P19


::::::::::.. Download Stats ..::::::::::
Connection is:: 245 Kbps about 0.2 Mbps (tested with 2992 KB)
Download Speed is:: 30 kB/s
Tested From:: http://www.testmy.net/
Test Time:: Mon Feb 21 21:39:30 UTC 2005
Bottom Line:: 4X faster than 56K 1MB download in 34.13 sec
Diagnosis: May need help : running at only 16.21 % of your hosts average (aol.com)
Validation Link:: http://testmy.net/id-DTI2ECL5U



I am getting a tad suspicious that it always caps at 30Kbps, both upload and download.

Out of curiosity, on my router setup screen it says:

  Data Rate
  Downstream/Upstream                    576Kb/288Kb

I take it that this is what it is "supposed" to be. I have never seen these figures change, so it looks like they're sent, not detected, but I'll keep my eyes on it.

Ok, results below,

TCP options string = 020405640103030101010402
MTU = 1420
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.
MSS = 1380
MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.
 
Default Receive Window (RWIN) = 71680
RWIN Scaling (RFC1323) = 1 bits (scale factor of 2)
Unscaled Receive Window = 35840
RWIN is not fully optimized (even though it is a comparatively large number). The unscaled RWIN value is lower than it should be, which can affect your connection to some servers. Also, RWIN being close above 65535 does not justify the header overhead of scaling. You might want to use one of our recommended RWIN values below.

For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
507840 (MSS x 46 * scale factor of
253920 (MSS x 46 * scale factor of 4)
126960 (MSS x 46 * scale factor of 2)
 63480 (MSS x 46) 
bandwidth * delay product (Note this is not a speed test):

Your RcvWindow limits you to: 2867.2 Kbps (358.4 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1146.88 Kbps (143.36 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 52 hops

TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 01011100

Precedence (priority) = 100 (flash override)
Delay = 1 (low delay)
Throughput = 1 (high throughput)
Reliability = 0 (normal reliability)
Cost = 1 (low cost)
****************************************************************************
After looking at the drop in MTU, i changed the router to "1540", then re-ran the test, which came back as follows
****************************************************************************

TCP options string = 020405b40103030101010402
MTU = 1500
MTU is fully optimized for broadband.
MSS = 1460
Maximum useful data in each packet = 1460, which equals MSS.
 
Default Receive Window (RWIN) = 71680
RWIN Scaling (RFC1323) = 1 bits (scale factor of 2)
Unscaled Receive Window = 35840
RWIN is not fully optimized (even though it is a comparatively large number). The unscaled RWIN value is lower than it should be, which can affect your connection to some servers. Also, RWIN being close above 65535 does not justify the header overhead of scaling. You might want to use one of our recommended RWIN values below.

For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)
 64240 (MSS x 44) 
**********************************************************************

bandwidth * delay product (Note this is not a speed test):

Your RcvWindow limits you to: 2867.2 Kbps (358.4 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1146.88 Kbps (143.36 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 52 hops

TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 01011100

Precedence (priority) = 100 (flash override)
Delay = 1 (low delay)
Throughput = 1 (high throughput)
Reliability = 0 (normal reliability)
Cost = 1 (low cost)

I ran a speed test, still 30Kbps, **********Ignore what you read after this bit, i was being a dumbass and saved the link to the results page above, instead of the actual test page... The results above are still correct, I'm just testing some other things now.