x370 Killer sli/ac with 3200 not showing second ca

Mobo x370 killer sli/ac
CPU ryzen 3 3200 g
Video dual Nvidia GeForce GTX 460

Sli bridge installed

Bios P5.8

Issue is the second GeForce is never recognized by the computer.
Is there a specific setup I need to do in bios to make the computer detect a second GeForce?

ok some quick thoughts

first your 3200g is a 2000 series (surprise ! its an apu with a zen+ /ryzen 2000 core)

second without a hunt to a source/link im pretty certain the ryzen apus 2200g/3200g/3200g/3400g all have GIMPED/diabled amount of pcie lanes compared to normal ryzen cpu's (maybe there is an option in bios to reduce the lanes given to primary pcie slot? )

lastly though and most serious
why are you trying to use sli (proven to have terrible support these days) with two what can only be called very very outdated and obsolete video cards ?

im not trying to offend at all but very very cheap modern cards are far far more powerful and trouble free to set up (and can hook up three displays easily)

i would hazard a guess the 3200g on board video to be close or exceed the gtx460 performance anyway
EDIT YES
onboard vega apu is 25% better than a gtx460
https://gpu.userbenchmark.com/Compare/Nvidia-GTX-460-vs-AMD-RX-Vega-11-Ryzen-iGPU/2167vsm401440

and i doubt the sli gtx460 would be able to increase the performance 25% either (in the rare instances they actually work and work better than with just the single gtx460)

Edited by datonyb - 08 Jun 2020 at 10:31pm

correct the ryzens all have the full 16 lanes to gpu
4 to pcie/nvme
and 4 to the chipset


re, the gtx460 vs vega

are you running just 1 stick of ram?

if so thats where its got gimped, as it has to use system ram and with only 1 stick you loose about half the fps (bandwidth)

with two sticks it can double its bandwidth and thus its fps

and then the actual ram speed 2133/2666/3200 mhz etc would really affect it using the slower ram eg 2133 ddr4


back to your lack of second pcie slot it may be the power/pcie lanes are actually de activated due to the cpu

like most of us
your pc skills are getting 'honed' by mistakes

grab a roll of toilet paper and i'll start listing mine (its a long list)
so dont worry about it

right memory ........
the am4 platform isnt the most *forgiving* when it comes to ram

but with later bios revisions and later cpu's it has got a lot better by far

first and formost , it would be very unwise to advise anyone to try and get a mixed set working and even if you get it to boot at the correct speeds theres the issue of random memory errors causing crashing later on

so
you havnt given any info as to what sticks you have in either pc

are they by chance the same brand and model in your and your sons?

if so then theres a good chance they will work together ok
(but please bear in mind some ram sticks may have the same part code BUT could have used different chips if made in different batches of production)
e.g. one batch of corsair might have hynic chips under the heatsinks one week and the next week they sourced samsung chips , to mix these would be a bit of a struggle for the memory controller , hence why you can get ram KITS they will come from the same batch and in theory get tested as a pair

the other point to note is ram speed
unless the am4 system is just a email grabber wifes shopping pc etc
its quite a performance lift to stay above 2666mhz ram (ideally 3000mhz or above)

i know im not bringing good news here but to be honest you have made some poor decisions with parts you have bought (once again please do not think im trying to make you feel bad)

but a 3200g dosnt usually sit in an x370 board

you dont usually consider a 3200g if any plans to use add in graphics cards in any board

and lastly the single ram stick (single channel ram mode) this is my main *bug-bear* with laptops always being shipped with 1 stick hence single channel operation from designers that really do know better but relent to the profits dept.

so your options ?

grab a non-apu type ryzen 1600AF/3300x/2600 etc
or
throw the gtx460s in the bin and grab a single rx570 circa $120

but either solution i would advise trying to get both your pc's on dual channel (e.g. 2 ram sticks)

i must say again the gtx460 really is well and truly past it compared to other parts of your system,
and hopefully you dont feel ive been rude ,its hard to convey advice and plan facts here without sounding arrogant and rude

glad to hear you have a plan , and it sounds well laid
also glad to help your quick update to 2020 pc rules

i too am an old git
started out on 386/486 systems
we didnt have to worry about ram matching then ............

we was too busy just trying to get the various cards working without IRQ conflicts using jumpers on each card to change the electronic addess

now that was a headache !