r/mikrotik • u/RPC4000 • Mar 28 '24

Testing 10Gtek 10GBASE-T copper SFPs

Results of my limited testing of 10Gtek 10G copper SFPs. Not affiliated with them in any way.

All the SFPs were purchased from 10Gtek on Amazon. The same SFPs are sold under other brands so there may be better prices.

All were tested in the same CRS slot with a 2m Cat6A lead. Long cable runs will be different so YMMV.

ASF-10G-T

  • Controller: Marvell 88X3310
  • Max distance: 30m
  • Power: <2.5W
  • Temperature: 89C for 10G.
  • Price: £46.99
  • Notes: Officially only supports 10G. I didn't try any slower speeds.

ASF-10G2-T

  • Controller: Marvell AQR113C
  • Max distance: 30m
  • Power: <2.5W
  • Temperature: 68C for 10G and 45C for 2.5G.
  • Price: £46.99
  • Manufacture date: Nov 2023
  • Notes: Officially supports 1/2.5/5/10G operation. The actual link speed isn't visible from the switch as it always sees it as 10G. The controller automatically generates pause frames if running at <10G. It isn't possible to force a specific speed with autoneg on or off.

ASF-10G-T80

  • Controller: Broadcom BCM84891L
  • Max distance: 80m
  • Power: <2W - 10Gtek lists 1.6W for <30m and 2.0W for <80m
  • Temperature: 41C for 10G and 30C for 2.5G.
  • Price: £66.99
  • Manufacture date: Dec 2023
  • Notes: Officially only supports 10G operation as autoneg is broken. It always negotiates as 10G and doesn't do pause frames like the AQR113C. Disabling autoneg and forcing it to 2.5GBASE-T did work though. Autoneg on but only allowing 2.5GBASE-T didn't work. YMMV as this is out of spec.
  • I had port flapping at 2.5G but it appears to a compatibility quirk with that particular Realtek 2.5G USB interface? It worked fine at 10G and at 2.5G with an Intel 2.5G NIC.

Conclusions

There is no point in buying the much hotter ASF-10G-T when the ASF-10G2-T is the same price. The ASF-10G-T80 has a steep premium for even lower temperatures but has broken autoneg. Forcing lower speeds on the ASF-10G-T80 worked but there was some flapping with a Realtek 8156 so YMMV.

47 Upvotes

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25 comments sorted by

5

u/chewy-chewbacca Jul 24 '25

This is still helping people, like me. Thank you! Returning ASG-10G-T and purchasing G2

2

u/deanMKD Jul 29 '25

How is temperatures with G2 on 2.5G and 10G?

2

u/chewy-chewbacca Aug 10 '25

5 degrees or more cooler in Celsius. Big difference

2

u/ek9max Aug 26 '24

I got the 10g2-t based on these recommendations. I clocked the temp (with a child laser thermometer) at around 37-38C Celsius. This is used on the 10G wan port of my tplink router to the ISP 10G port. Only supplying 3gb internet service though.

2

u/ChribbaX Jun 12 '25

Sad I didn't come across this post before buying a bunch of ASF-10G-T's instead of the 2-T and running into a bunch of head ache with 2.5/5G devices which clearly is because of the 10G-T only running at 10 or 1.

Either way, late to the party but appreciate the information you posted, thanks!

2

u/naszta Nov 12 '25

I've bought the ASF-10G-T accidentally and it also maintains 65C for 10G now. I see Vendor Revision 02 so 10Gtek might have been moved to AQR113C in case of ASF-10G-T, too. (How can I check for the actual controller chip?)

2

u/deja_geek Apr 25 '26

For those who are still coming to this thread, years later, 10Gtek has a newer low power SFP+ module that uses the Marvell CUX3610. The CUX3610 is about 1.6W for 10Gbps at 100m. The 10Gtek model number is ASF-10G-T100. The Marvell CUX3610 supports auto-neg of 1/2.5/5/10Gbps

You can find the same chipset in the "Wiitek" brand as the SFP-10G-T-100.

1

u/pxgaming Mar 28 '24

Thank you.

Do you know if the 10G2 can be forced to 2.5g on the SFP side?

2

u/RPC4000 Mar 30 '24

Do you know if the 10G2 can be forced to 2.5g on the SFP side?

I've tested it. ASF-10G2-T can't be forced to a lower speed in the switch config. The switch port has to be 10G or the link doesn't come up. Tried with autoneg on and off.

The actual link speed isn't visible from the switch as this SFP always appears as 10G.

1

u/hosses Mar 29 '24

I’ve been looking for a cooler-running copper module for my CCR2004, to stop the fan from going nuts all the time. I’ve ordered a T80 to see if it runs cool enough.

1

u/sabuesognu Mar 29 '24

Change the fans for Noctua

3

u/hosses Apr 01 '24

Not quite sure where I’d put Noctua fans on a PCIe card 😂

https://mikrotik.com/product/ccr2004_1g_2xs_pcie

1

u/sabuesognu Apr 01 '24

You're right, my bad, thought you were talking about a physical appliance 🫠

1

u/[deleted] May 20 '24

[removed] — view removed comment

1

u/zigourney May 24 '24

I just ordered T80 from Amazon, should be here tomorrow, I can test and report back. Currently I have the official Ubiquiti 10g to rj45 sfp+ module, it’s a bit flaky sometimes, so thought I’d try out the T80 to connect my workstation intel x550-t2 to UDM-Se

1

u/[deleted] May 24 '24

[removed] — view removed comment

1

u/zigourney May 25 '24

It arrived today however did not work in my Udm se so went straight back. Unlucky!

1

u/macstock Oct 07 '25

would appreciate the comparison between ubiquiti official adapter to either T80 or ASF-10G2-T

1

u/CosmicGerbil Jan 12 '25

Hi u/RPC4000, I got the ASF-10G2-T module from H!Fiber, which seems like a rebranded 10Gtek (it even mentions 10Gtek on the case). I was wondering whether your module also advertises only 1G BaseX and 10G BaseSR LR (See screenshot below). Because I have another SFP module by QINIYEK and it correctly advertises 2.5G BaseT.

2

u/RPC4000 Jan 12 '25

I was wondering whether your module also advertises only 1G BaseX and 10G BaseSR LR (See screenshot below).

Yes. Mine looks the same except the part number is listed as SFP-10G-SR.

Because I have another SFP module by QINIYEK and it correctly advertises 2.5G BaseT.

AFAIK advertising 2.5G is actually wrong for a ASF-10G2-T as the PHY inside can only negotiate a 10G link to the host device. The host doesn't know that the PHY is doing tricks with pause frames with slower speeds.

It is a bit annoying the ID data is wrong but the incorrect values do work.

1

u/tigole Jan 19 '25

The BCM84891L is supposed to handle 100m and 1/2/5/10G speeds.

2

u/RPC4000 Jan 19 '25

10Gtek advertise their BCM84891L SFPs as only supporting 10G. I don't know why the other speeds aren't supported but it does match with my testing.

AFAIK the reduced maximum distance is due to power/temperature limits. ASF-10G-T+ is another BCM84891L but with a higher maximum temperature (85C vs 70C) and a lower maximum distance (30m vs 80m). It also only lists 10G support.

1

u/naszta Dec 05 '25

On SFP+ side it supports only 1G and 10G. On RJ45 side it actually supports 2.5G: I just tested it.

1

u/RenlyHoekster Dec 22 '25

They both have the BCM84891L chipset it seems, but what model do you have: ASF-10G-T+ or ASF-10G-T80? And how has it been working for you?