I saw that GOG was using 100% of my network on Task Manager it said 95 Mbps and I look at GOG it says it's only using 11 Mbps how does that work can anyone explain this to me?

Task manager measures in Mega-bits-per-second(Mbps) and Galaxy in Mega-Bytes-per-second(MBps), note the lowercase "b" in bits vs "B" in Bytes.
1 Byte have 8 bits, so 95Mbps is 11.875MBps, give or take some rounding errors plus the different way they are measured and there it goes.

Though with overhead it should be closer to 10 bits per byte, this is with the TCP/IP overhead, ECC codes added in, resending broken packets and all that jazz. Then what constitutes a meg is screwed up too, defaulting to a million bits rather than the actual 2^20 bits (A difference of 48576 bits or 6k, 5% difference)

The type of annotations can always be confusing and annoying. There's two use cases usually is:

1) To make something look/seem bigger and more impressive (A console cartridge holds 40 MEGA POWER! proudly toted on the box as a feature)
2) Because you're dealing in small numbers so bits vs bytes is a better metric for direct control. (128kbit/s audio for mp3)

If you are maxing out your network then it would probably be worth investing in a gigabit network card (NIC) - they cost about $20 and are easy to install. It would improve your internet bandwidth/speed a fair bit.

Most people's internet speed is limited by their broadband speed, it's strange that you have fast broadband but only a 100Mbit network card.

Many people are running old CAT cables wich can't do Gigabit, most don't even know or don't care. I always use the 10 factor myself, but the "problem" in the OP is due diferent metrics.

Those marketed inflated numbers with a semi-random unit, I call them calories but megapowers works too.
Why calories? Because even "experts" are using the Cal unit when should be kCal and that ticks me quite a bit.

I have a bunch of Cat-5 myself, i asked a tech what the difference of Cat-5 and Cat-6 and he told me it was basically shielding, which would be useful in areas with more interference, but otherwise they were the same.

In raw numbers Gigabit should allow up to 120Mb/s, and 100Mbit should allow 12Mb. I usually see 6 myself, but that might be more the routers and intercommunication that gets in the way vs direct PC to PC via a cat cable to test it. I used 'Mega Power' only because in the video i supplied going over largest genesis games that's how they use it. Just seemed more fun :P

Don't know the ins and outs but I have at least 2 long cables that no matter the device I plug them, it always connect at 100Mbps not Gigabit, both are rated cat5. One of them is still in use on my mancave, since its a pain in the knee to change it.
On the other end, my old Raspi 3 is connected by the cheapest cable I found at the time and it connects at 1000Mbps speed, not that the device can saturate the rated speed anyway as it uses USB 2.0 to Eth converter.

I believe some older spec cables can't properly do Gigabit and many houses have them in the walls. Seen a bunch of other people computers connected by wall cables at 100Mbps. Gonna steal that one.

Distance may be an issue on it. Though i wonder if it may not be drivers. Check they aren't generic drivers, or might look at the specs for the max length of cable you can have and still have Gigabit speeds. I would think 30ft would be okay...

https://www.howtogeek.com/813419/how-long-can-an-ethernet-cable-be/ Err... Okay so it isn't the length as i doubt you're going 300+ feet. I have what i consider long cables, but they don't quite reach 50ft. So the difference has to be 5 vs 5e, though how that's different i couldn't tell you. Though Cat5 is sufficient for me, although local transfers between computers of large media may take a few seconds/minutes longer.

Drivers don't seems to be the issue, since when I change cables everything just works at proper speeds.
The cables I was refering as long are around the 20m (60ft) mark, cable quality may also be a factor in lenght due losses in wires.

Thanks for the quotes :)
Just checked and the Raspi cable is Cat-5e and can do Gigabit and one of the "bad samples" is rated Cat-5e as well, the cable on the man cave I can't check that easy.
I should note that the "bad sample" was bought on a shop know for very low quality products, so the rating may not be true.

My issue with speed is precisely large file transfer between computers, wich I do in regular basis. The internet speed is not a big problem at all, I can live with that.
Only on my mancave the 100Mbps remains but since is connected to a old Router serving as Access Point wich only have fast 100Mbps ports and 144Mbps 2.4GHz wifi, the cable is a major PITknee to change as well, I'll just leave it as is.

Yeah, since getting my NAS I've been regularly downloading to a local always-online machine and then transferring 100GB at a time which can take an hour or something. Though looking at the cable itself i see a nice little 'CAT 5E' imprinted on it; So i thankfully don't need to get a different box of raw cable, the ones i crimp myself generally are fine. For internet the connection won't matter as much, but you might feed and have a separate router connected to the rest of your network that is faster (assuming your long cable is already good).

Some 6 months or so ago when it became apparent i needed more connections on the network i went with a Gigabit switch that was extensible/forwardable. Not too expensive either, i think like $20 each. The RC-409LXv2, which has at this point with 2 of my 4 switches in use has been my main networking for a bit (and some 2.4Ghz wireless). Using the switch as an intermediate hub may give you the Gigabit, while the router's 100Mbit connection won't interfere (well, assuming the line leading out isn't the issue. Don't hurt your knees if you don't have to).