DSL router upgrade

[tyngasto92]

Hello, i have some issues with CS2 jitter, every 2 second spikes to 50ms dl/ul jitter. I bought new NIC intel l210-T1 but unfortunately it didn't fix the problem. So it's time to buy new router. I found used Fritz!Box 7530 in good price (50$), also 7520 for 35$, what do u think, is it good deal? Or should i buy brand new router? In this budget i can get only something like tp-link archer vr300 or vr400, from little research i did i assume these are way worse than these used Fritz!Box 7530/ 7520. Btw my internet speed is pretty bad, 20mb/s download and 1mb/s upload same as my 12 yo tp-link router but i have stable 17-19ping in game, it's all that matters for me but i noticed these jitter spikes which makes my teammates and enemies micro stutter every 2-4 seconds. Eventually these jitter spikes stops for 1-2 minutes then these are back for next 20 mins. If you have some better options than these routers i  mentioned feel free to post here, i appreciate.

 

That's how it looks in game, all the info in top right corner, i recommend fullscreen

 

 

and there is my bufferbloat result, just in case

 

 

[Thomas53]

Before doing anything try an outlet on a different circuit, It may simply be either a badly wired outlet or a worn out socket - probably not but it's free to check.

[Omon_Ra]

A new router may help smooth things out a little bit. You could also check/replace the ethernet cable going from your PC to the router. But the big bottleneck is your DSL service itself. Those are about typical speeds for DSL. Sometimes you could get up to maybe 3-5mbps upload, but if possible, you really should get a new ISP. Fiber is generally best, but Starlink or even a 4/5G cellular modem would be better, cable would also improve your speeds. If you have anything else on your network while gaming, you're going to saturate your overall bandwidth pretty quickly which would also cause the lagspikes.

[Alex Atkin UK]

Also bear in mind that bufferbloat occurs due to running out of bandwidth, it will not be the cause of the problem if the only thing going on is gaming at the time the latency spike occurs.

[tyngasto92]

1 hour ago, Alex Atkin UK said:

Also bear in mind that bufferbloat occurs due to running out of bandwidth, it will not be the cause of the problem if the only thing going on is gaming at the time the latency spike occurs.

Yeah that's what i was thinking, from logical standpoint 100% usage=high ping. 

 

16 hours ago, Omon_Ra said:

A new router may help smooth things out a little bit. You could also check/replace the ethernet cable going from your PC to the router. But the big bottleneck is your DSL service itself. Those are about typical speeds for DSL. Sometimes you could get up to maybe 3-5mbps upload, but if possible, you really should get a new ISP. Fiber is generally best, but Starlink or even a 4/5G cellular modem would be better, cable would also improve your speeds. If you have anything else on your network while gaming, you're going to saturate your overall bandwidth pretty quickly which would also cause the lagspikes.

Again, i don't mind low speeds, all i care is ping, loss and jitter. Im living in small village and all i can have is dsl or lte. Believe me if i could have a fiber i would buy it 10 years ago, im paying 20$/month for 20mb/s, technically i have 100mbps but telephone central (?) is too old and i can use only 20mbps Few villages around have acces to fiber but unfortunately not me  Jitter spikes occur when i have no internet usage other than gaming when my ping is stable 19ms.

[Alex Atkin UK]

13 minutes ago, tyngasto92 said:

Yeah that's what i was thinking, from logical standpoint 100% usage=high ping. 

 

Again, i don't mind low speeds, all i care is ping, loss and jitter. Im living in small village and all i can have is dsl or lte. Believe me if i could have a fiber i would buy it 10 years ago, im paying 20$/month for 20mb/s, technically i have 100mbps but telephone central (?) is too old and i can use only 20mbps Few villages around have acces to fiber but unfortunately not me  Jitter spikes occur when i have no internet usage other than gaming when my ping is stable 19ms.

I still think most jitter problems are ISP related and completely out of the users control, except for people using WiFi.   Plus there's always some possibility of contention at the exchange backhaul.

 

I have a good fibre connection on a good ISP and still had a pretty poor experience on cloud game streaming because something was going between my ISP and the data centre

[Donut417]

16 hours ago, tyngasto92 said:

Yeah that's what i was thinking, from logical standpoint 100% usage=high ping. 

I know from personal experience that if you saturate your upload it can bring down the whole connection. Based on your speed test, you have less than 1 Mbps upload. So Im guessing your saturating your connection and thats likely causing the issue. You might want to explore what options the LTE provider can give you. 

[tyngasto92]

Seems like this fritz box is using rj45 instead of rj11. Is this adapter ok? https://www.kaufland.pl/product/321230509/?search_value=rj45+na+rj11

[Donut417]

1 hour ago, tyngasto92 said:

Seems like this fritz box is using rj45 instead of rj11. Is this adapter ok? https://www.kaufland.pl/product/321230509/?search_value=rj45+na+rj11

That’s because the Fritz box doesn’t have an integrated DSL modem. You will need a standalone DSL modem or a router with one integrated. Though I have doubts that will solve your problem. 

[tyngasto92]

2 hours ago, Donut417 said:

That’s because the Fritz box doesn’t have an integrated DSL modem. You will need a standalone DSL modem or a router with one integrated. Though I have doubts that will solve your problem. 

you're wrong, it have integrated dsl modem, just using rj45 which is popular in germany instead of rj11

 

Google: "

Yes, the AVM FRITZ!Box 7520 supports ADSL and ADSL2+. [1]

The device features an integrated VDSL/ADSL modem capable of handling ADSL (Annex A/B/J), ADSL2+, and VDSL (including VDSL2 and 35b supervectoring) technologies. [1, 2, 3]

Key details:

• Backwards Compatibility: Although it supports newer VDSL speeds (up to 300 Mbit/s), it is fully backwards compatible with older ADSL/ADSL2+ lines."

[Donut417]

10 hours ago, tyngasto92 said:

you're wrong, it have integrated dsl modem, just using rj45 which is popular in germany instead of rj11

 

Google: "

Yes, the AVM FRITZ!Box 7520 supports ADSL and ADSL2+. [1]

The device features an integrated VDSL/ADSL modem capable of handling ADSL (Annex A/B/J), ADSL2+, and VDSL (including VDSL2 and 35b supervectoring) technologies. [1, 2, 3]

Key details:

• Backwards Compatibility: Although it supports newer VDSL speeds (up to 300 Mbit/s), it is fully backwards compatible with older ADSL/ADSL2+ lines."

Interesting. US only uses RJ11 for DSL. Though in the US DSL is dead for the most part. AT&T stopped selling aDSL. VDSL is no longer being deployed. Still I doubt this will fix your issue. You need a better internet connection. 

[Alex Atkin UK]

On 5/3/2026 at 2:12 PM, Donut417 said:

Interesting. US only uses RJ11 for DSL. Though in the US DSL is dead for the most part. AT&T stopped selling aDSL. VDSL is no longer being deployed. Still I doubt this will fix your issue. You need a better internet connection. 

About time, AT&T were still deploying new VDSL a few years back in rural Texas which seemed REALLY late.

[Donut417]

51 minutes ago, Alex Atkin UK said:

About time, AT&T were still deploying new VDSL a few years back in rural Texas which seemed REALLY late.

Well the key word there is Rural. Not many providers will deploy Fiber in rural areas here in the US. 
 

Some times it has to do with the local infrastructure. It’s likely they had Fiber ran to the area but not enough to do Fiber to the home. I know in new areas Comcast has deployed Fiber but in some cases it’s the same old Docsis as elsewhere else. 

[Caroline]

Are you on a wired connection or wifi? wifi sucks for gaming, and in general tbh.

Getting a new router might help, but there's the chance it won't do anything at all too.

 

If it makes you feel better your internet is ~40x faster than mine, I'm on 512K with an upload speed that's 16K on a good day, since most of the internet is made for speeds of this century I constantly get timeout errors or just crashed downloads because the server thinks I've disconnected. About the speed of pigeon post.

[tyngasto92]

Yep, im on wired.

I installed this new fritzbox and i cant connect with DSL, it's bad login settings or cable is not connecting properly, i bet the 1st scenario. Cuz i had to change my region from germany and there is a lot of things to change. I was taking advices from 3 other forums and still not working.

 

There are some screenshots from imo most important sections in router panel:

 

 

 

 

 

 

[tyngasto92]

The problem was "Annex B" in router settings, changing on "Annex A" fixed the problem.

And most important, new router fixed my jitter issues, no more 50ms jitter spikes in CS2