Regarding PCIE 90 degree risers!!

[GordonFreemanInTheFlesh]

Recently I have been thinking of adding a graphics card to my 1.5U server and it is absolutely necessary to first install one of these 90° adapters

http://imgur.com/a/99Y1QYV

Normally for older PCIe 3.0 that shouldn't be a problem but it might be for newer PCIe 4.0 and up, or will it make no difference with newer gen and or bottleneck the graphics card in any way!?
The riser shown in the photo is PCIE-16x.

 

[ThrashZone]

Hi,
Only issue I see off the bat is the fans on the gpu would be facing the mother board so very limited on how much room until you run out and hit the board
Unlike the back of a gpu which would or might not have a back plate so it would takeup the least amount of room.

Traditionally a vertical gpu fans would face outward so yeah that pci-e card is ass backwards.

 

[ShiBDiB]

I don't see how it should bottleneck in any kind of noticeable way. The only issue like thrash described would be some weird airflow issues.

That and how sturdy is that? Some GPU's are pretty heavy and I'd worry about warping your motherboard with the PCIe slot being under load at an angle it's not designed for.

 

[cvaldes]

That and how sturdy is that? Some GPU's are pretty heavy and I'd worry about warping your motherboard with the PCIe slot being under load at an angle it's not designed for.

How would that matter?

The orientation of the adapter's PCIe slot puts the graphics card fan(s) toward the motherboard, meaning this adapter is really only going to accommodate 1-slot graphics cards. This adapter isn't tall enough to accommodate gaming cards with thick coolers.

Besides, he's putting this into a 1.5U server.

 

[ShiBDiB]

How would that matter?

The orientation of the adapter's PCIe slot puts the graphics card fan(s) toward the motherboard, meaning this adapter is really only going to accommodate 1-slot graphics cards. This adapter isn't tall enough to accommodate gaming cards with thick coolers.

Besides, he's putting this into a 1.5U server.

You're putting torque on something not meant to have any. With enough weight that can cause an issue.

 

[Blue4130]

You're putting torque on something not meant to have any. With enough weight that can cause an issue.

The card is bolted to the case. The torque is going to be minimal to non-existent.

 

[GordonFreemanInTheFlesh]

Hi,
Only issue I see off the bat is the fans on the gpu would be facing the mother board so very limited on how much room until you run out and hit the board
Unlike the back of a gpu which would or might not have a back plate so it would takeup the least amount of room.

Traditionally a vertical gpu fans would face outward so yeah that pci-e card is ass backwards.

I will be using an ITX/ax motherboard so the gpu intake will be on the bottom.

 

[ThrashZone]

Hi,
ITX is a much different animal so you should be fine.

 

[GordonFreemanInTheFlesh]

Hi,
ITX is a much different animal so you should be fine.

Thank you for the reply !

 

[Valantar]

A riser will never bottleneck your system - either it works at the rated PCIe speed of your motherboard+GPU (whichever is lowest), or it doesn't, and if it works, it works. Your PC can't tell the difference.

You can of course also use a lower-gen riser with higher gen components, but you then need to manually set your PCIe link speed in the BIOS to what the riser can handle before installing the GPU and riser (or using a separate display adapter of some sort), and you will need to do this again every time the BIOS is reset. If not, your GPU will likely simply not work, or you might get intermittent black screens if it's an edge case. For peace of mind and simplicity though, get a riser that matches the highest capability of your motherboard+GPU, even if it's more expensive.

 

[GordonFreemanInTheFlesh]

A riser will never bottleneck your system - either it works at the rated PCIe speed of your motherboard+GPU (whichever is lowest), or it doesn't, and if it works, it works. Your PC can't tell the difference.

You can of course also use a lower-gen riser with higher gen components, but you then need to manually set your PCIe link speed in the BIOS to what the riser can handle before installing the GPU and riser (or using a separate display adapter of some sort), and you will need to do this again every time the BIOS is reset. If not, your GPU will likely simply not work, or you might get intermittent black screens if it's an edge case. For peace of mind and simplicity though, get a riser that matches the highest capability of your motherboard+GPU, even if it's more expensive.

Do you have any brands in mind?
90° risers seem to be quite niche!

 

[Count von Schwalbe]

Athena Power CABLE-PCIE16X40-L20 200mm Premium PCI-E 4.0 High Speed Flexible, 90 Degree Left angle Extender Riser Cable 200mm - Newegg.com

Buy Athena Power CABLE-PCIE16X40-L20 200mm Premium PCI-E 4.0 High Speed Flexible, 90 Degree Left angle Extender Riser Cable 200mm with fast shipping and top-rated customer service. Once you know, you Newegg!

www.newegg.com

A flexible riser cable should be just what the doctor ordered. Set it to any height, 4.0 certified, and no stress on the motherboard.

 

[Valantar]

Do you have any brands in mind?
90° risers seem to be quite niche!

Rigid risers in general are very niche, as they're generally built for specific cases. Servers use tons of them, and you have people like C-payne making custom rigid risers, but as you need your case to be built specifically to match the dimensions and any mounting holes for that given riser, they're essentially not sold separately - there's no market for them.

Flexible risers are on the other hand abundant, though PCIe 4.0 risers are difficult to make and expensive. ADT-Link is my go-to brand, though there are others making good stuff as well (linkup, various more consumer-facing brands (often OEMed by Linkup or ADT-link). ADT has the benefit of a massvive selection and tons of flexibility, where most other brands offer just a few select SKUs. With ADT-link you can choose your connector orientations and styles on many types of riser/extender they make (they make USB, DP, HDMI and other extenders as well as PCIe risers), and you get to choose between a bunch of lengths, from . They are also the only riser maker I know of offering flexible risers with built-in PCIe 4.0 redrivers.
4.0 riser
4.0 riser with redrivers
3.0/possible 4.0 (dependent on motherboard, AIC, ++) riser

 

[claes]

Now just have to build a custom mount for the server chassis Which one are you using?

 

[GordonFreemanInTheFlesh]

Now just have to build a custom mount for the server chassis Which one are you using?

It's a 1.5U no name chasis

Rigid risers in general are very niche, as they're generally built for specific cases. Servers use tons of them, and you have people like C-payne making custom rigid risers, but as you need your case to be built specifically to match the dimensions and any mounting holes for that given riser, they're essentially not sold separately - there's no market for them.

Flexible risers are on the other hand abundant, though PCIe 4.0 risers are difficult to make and expensive. ADT-Link is my go-to brand, though there are others making good stuff as well (linkup, various more consumer-facing brands (often OEMed by Linkup or ADT-link). ADT has the benefit of a massvive selection and tons of flexibility, where most other brands offer just a few select SKUs. With ADT-link you can choose your connector orientations and styles on many types of riser/extender they make (they make USB, DP, HDMI and other extenders as well as PCIe risers), and you get to choose between a bunch of lengths, from . They are also the only riser maker I know of offering flexible risers with built-in PCIe 4.0 redrivers.
4.0 riser
4.0 riser with redrivers
3.0/possible 4.0 (dependent on motherboard, AIC, ++) riser

I really appreciate the time you took to explain in detail everything!
Thank you!