bifurcation for 2 gpus tuf gaming plus [wifi] x570

[mark 11:11]

Hello again
so going to be adding the second gpu in soon as planned, was going to just bung it in the empty x4 slot that is off the chipset....
thats my back up plan in case this idea isnt going to work [and i have a feeling it wont work so its probably the plan a with this idea being plan b in case i can do it]
can I with this motherboard bifurcate the primary x16 slot [which currently hosts my gpu] into 8x8 so i can then run both gpus in that slot.... thus relieving any
possible bottle neck with the other slot being on the chipset and also just as importantly it would leave that other x4 slot empty which i can then bung another nvme
drive in [which ive actually just got another nvme on its way from ocuk lol]
even better if it can do 8x4x4 as the second gpu only has 4 lanes anyway [6500xt] then i could in fact bung the 9070xt in the first 8 lanes then the 6500xt and a further nvme could use the other 4 and 4
im guessing that last idea is probably very much not possible
BUT if i can at least get both gpus onto that slot and use the x4 on the chipset to bung this 990 pro ive got on its way that would be a massive massive bonus.
Also other than having to set up bifurcation in the bios im assuming i need to buy some adaptors/some other hardware to actually physically facilitate this......
google isnt really helping me much here i can only find people trying to add 4 m.2s using the asus hyper cards and im guessing they are putting hte gpu somewhere else or using onboard igpu or something
its not giving me a clear yes you can or no you cant kinda answer.
is this doable?
i should probably stop messing about and upgrading stuff but theres just too many obvious improvements i can do so im trying lol
Any info gratefully recieved

 

[Tetras]

google isnt really helping me much here i can only find people trying to add 4 m.2s using the asus hyper cards and im guessing they are putting hte gpu somewhere else or using onboard igpu or something

That's because the main context that we talk about bifurcation is when you split the main PCI-E slot's 16 lanes into say..., 4x4x4x4 for the purpose of installing a 4 slot M.2 card.

There's not an adapter that I'm aware of that can somehow split off bifurcated lanes from a slot, so that you can use 8 for two graphics cards, other than something like the Hyper M.2 card you mentioned, or a riser.

even better if it can do 8x4x4 as the second gpu only has 4 lanes anyway [6500xt] then i could in fact bung the 9070xt in the first 8 lanes then the 6500xt and a further nvme could use the other 4 and 4

Ryzen CPUs can split their primary (graphics) lanes to 8 and 8 for a primary and secondary slot, but unfortunately that hardware is already present on the motherboard and yours just isn't wired that way.

was going to just bung it in the empty x4 slot that is off the chipset....

The 6500 XT only has 4 lanes anyway, so seems like a sensible option.

BUT if i can at least get both gpus onto that slot and use the x4 on the chipset to bung this 990 pro ive got on its way that would be a massive massive bonus.

I don't know of any way to do that, but miners did all kinds of stuff a few years ago, so who knows

 

[mark 11:11]

yeah tbh i just want to try and bung the two gpus on that x16 slot so 8 lanes to the 9070 and 8 lanes to the 6500xt [that actually only has 4 so 4 would be wasted but still its better than the second gpu being on the chipset i guess lol]
ok so this probably isnt doable then?
damn i would have thought splitting it into a pair of 8s would be the easiest option lol
sounds like im going to have to come up with another way of using this extra drive then
probably clone my c drive onto it i guess and then whack the c drive somehwere else on the x1 thats left over i guess
damn lol

 

[Tetras]

ok so this probably isnt doable then?

It is technically doable because that's what the M.2 card does, but I'm not aware of an adapter you can buy that does it.

The main problem I can think of is that you'd need some kind of adapter/riser in the primary slot first and then you'd have to install the two cards each from a riser. That wasn't an issue for miners 'cos they had that kind of kit, but in a standard case that might be a problem just to physically fit the cards.

sounds like im going to have to come up with another way of using this extra drive then
probably clone my c drive onto it i guess and then whack the c drive somehwere else on the x1 thats left over i guess

Using a 1 lane adapter isn't that bad if the M.2 drive accepts running off it. Is mainly only large reads/writes that suffer, like copying files from one drive to another.

 

[mark 11:11]

yeah true on the x1 lane thing just seems like it would be slow but yeah worst case
and i dont have any issues using riser cables, i will need to anyway as the other slot that im going to have to put the gpu in [or the m.2 if it turns out it is doable bunging both cards off hta tx16 lane] is already covered up by my gpu so im going to have to use a cable to use that slot anyway lol

il look into if an adaptor to split it into 2 sets of 8 exists but im guessing if you havnt seen/heard of htem then they probably dont exist lol
Back to the drawing board i guess

 

[Tetras]

il look into if an adaptor to split it into 2 sets of 8 exists but im guessing if you havnt seen/heard of htem then they probably dont exist lol
Back to the drawing board i guess

I think the best place to ask would be miner forums, because they did this kind of stuff more than anybody. They'd have rows of cards in a box all running off little risers.

Possibly something like this:

ADTLink PCIe 4.0x16 MCIO graphics card split extension cable supports one-to-two x8 split

ADTLink PCIe 4.0x16 MCIO graphics card split extension cable supports one-to-two x8 split

www.adtlink.cn

But, I don't really know what I'm looking at and they're massively expensive from what I can find. £50 would be my limit, but maybe that's not realistic.

Edit: also important to mention that a lot of these things melted

I think that was mainly riser cards that used SATA to deliver power.

 

[mark 11:11]

yeah im starting to rapidly think this idea is one to leave as theoretical and just make sure when i go am5 i chose a board suitable for the drives and gpus il be trying to hang off the thing lol
and use that x1 slot for the extra 990 [funnily enough i was about to bung a 970 evo plus i had in that x1 card adaptor hence why ive got it im evicting the 970 to put the first 990 in ive bought 2 990 pros this week and i already have a 2tb one in there lol]
so yeah il just bung the extra 990 in the x1 adaptor and bung the 970 in a usb caddy thing or something its not like im going to be actually using all 4 gen 4 drives at max speed all at once i just need to plan out what data goes on what drive itl still be a lot faster than sata even on the x1 slot
thanks btw appreciate the help and the sanity check lol

 

[Tetras]

yeah im starting to rapidly think this idea is one to leave as theoretical and just make sure when i go am5 i chose a board suitable for the drives and gpus il be trying to hang off the thing lol

Personally, I'd not be keen on running both cards from risers, so that's probably for the best

It can be tricky even with AM5, because limited PCIE lanes/slots are still a problem. You do get more M.2 slots though, or at least you can have more.

so yeah il just bung the extra 990 in the x1 adaptor and bung the 970 in a usb caddy thing or something its not like im going to be actually using all 4 gen 4 drives at max speed all at once i just need to plan out what data goes on what drive itl still be a lot faster than sata even on the x1 slot

Yeah, I'd still prefer a PCIE drive on a 1 lane slot than a SATA drive. Not even because of the speed, just because most SATA drives are bad nowadays.

thanks btw appreciate the help and the sanity check lol

No worries

 

[mark 11:11]

the issue with sata drives is ive already got all 8 sata ports populated LOL!
yeah the am5 thing was more of a to do this with my current rig id need a different motherboard im guessing and by the time ive paid out more on this i might as well just save a bit longer and just do the am5 upgrade and be done with
it i mean ive spent over half the am5 cost in the last week on two drives lol
im not the most sensible of guys i have to be honest lol
also most am5 cpus have the igpu which might actually do the same job that the 6500xt is going to be doing [half of the job is so i can run an extra monitor without the refresh rate/vram issues ive been having and hte other half is to run lossless scaling on
they didnt make a 9080xt so we have to improvise type thing
ive actually got more sata drives and ive got a pcie card with 12 sata slots but the slot that it was bound for is now the one im going to whack this m.2 drive into lol so yeah kinda been chasing my tail in a zigzag pattern of late lol
all good
il bung the extra drive on the x1 bung the older gen 3 drive in a usb enclosure thingy bung the extra gpu in the other x4 slot and just be mindfull what data goes where and save up for am5 and retire this to being a glorified nas type thing to put the stuff i cant fit on the am5 rig i guess
nice one
have a great weekend
and hope someone either gets a laugh or finds something usefull if they ever find this thread in future