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PCI-E x8 Splitter

Grimm Spector
By Grimm Spector
in Cases and Mods
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Hey everyone, I have an application where I need to split out a PCI-E x8 slot into two PCI-E x4 slots, ideally to two x8 slots with only x4 bandwidth on each, but I'll take what I can get. I've looked around a fair bit with no success. Hoping someone here might have some helpful suggestions. Thanks!

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https://www.ebay.com/itm/Supermicro-RSC-R2UF-2E8GR-2U-RHS-PCI-Express-x16-PCI-Express-x8-Riser-Card/331724041040?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D44040%26meid%3D7da2b2b2555f4300b2632d1e2012b774%26pid%3D100011%26rk%3D3%26rkt%3D12%26sd%3D320906472140&_trksid=p2047675.c100011.m1850

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5 minutes ago, Grimm Spector said:

Hey everyone, I have an application where I need to split out a PCI-E x8 slot into two PCI-E x4 slots, ideally to two x8 slots with only x4 bandwidth on each, but I'll take what I can get. I've looked around a fair bit with no success. Hoping someone here might have some helpful suggestions. Thanks!

What your asking for is a complicated solution, there are PCI-E splitters but anything passive will not work on regular motherboard it must use a PLX chip to communicate between the board and the splitter to basically direct traffic. The problem though lies in the PLX option and motherboard compatibility, unless your board is a server board or has a list of dedicated splitters that can be used it's all trial and error. 

 

 

 

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2 minutes ago, CUDA_Cores said:

Depending on what OP is trying to do, buying a new motherboard might be a better choice.

That is true but its what he asked for! 

Use this guide to fix text problems in your post. Go here and here for all your power supply needs

 

New Build Currently Under Construction! See here!!!! -----> 

 

Spoiler

Deathwatch:[CPU I7 4790K @ 4.5GHz][RAM TEAM VULCAN 16 GB 1600][MB ASRock Z97 Anniversary][GPU XFX Radeon RX 480 8GB][STORAGE 250GB SAMSUNG EVO SSD Samsung 2TB HDD 2TB WD External Drive][COOLER Cooler Master Hyper 212 Evo][PSU Cooler Master 650M][Case Thermaltake Core V31]

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Cupid:[CPU Core 2 Duo E8600 3.33GHz][RAM 3 GB DDR2][750GB Samsung 2.5" HDD/HDD Seagate 80GB SATA/Samsung 80GB IDE/WD 325GB IDE][MB Acer M1641][CASE Antec][[PSU Altec 425 Watt][GPU Radeon HD 4890 1GB][TP-Link 54MBps Wireless Card]

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Carlile: [CPU 2x Pentium 3 1.4GHz][MB ASUS TR-DLS][RAM 2x 512MB DDR ECC Registered][GPU Nvidia TNT2 Pro][PSU Enermax][HDD 1 IDE 160GB, 4 SCSI 70GB][RAID CARD Dell Perc 3]

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Zeonnight [CPU AMD Athlon x2 4400][GPU Sapphire Radeon 4650 1GB][RAM 2GB DDR2]

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Server [CPU 2x Xeon L5630][PSU Dell Poweredge 850w][HDD 1 SATA 160GB, 3 SAS 146GB][RAID CARD Dell Perc 6i]

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Kero [CPU Pentium 1 133Mhz] [GPU Cirrus Logic LCD 1MB Graphics Controller] [Ram 48MB ][HDD 1.4GB Hitachi IDE]

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Mining Rig: [CPU Athlon 64 X2 4400+][GPUS 9 RX 560s, 2 RX 570][HDD 160GB something][RAM 8GBs DDR3][PSUs 1 Thermaltake 700w, 2 Delta 900w 120v Server modded]

RAINBOWS!!!

 

 QUOTE ME SO I CAN SEE YOUR REPLYS!!!!

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54 minutes ago, 8uhbbhu8 said:

https://www.ebay.com/itm/Supermicro-RSC-R2UF-2E8GR-2U-RHS-PCI-Express-x16-PCI-Express-x8-Riser-Card/331724041040?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D44040%26meid%3D7da2b2b2555f4300b2632d1e2012b774%26pid%3D100011%26rk%3D3%26rkt%3D12%26sd%3D320906472140&_trksid=p2047675.c100011.m1850

Correct me if I'm wrong, but doesn't this only work with particular Supermicro boards?

53 minutes ago, CUDA_Cores said:

Af far as I know nothing like that exists that is cheaper than just buying the correct motherboard. 

 

I know they exist because this has been mentioned before on an older topic:

 

But it's usually more practical to buy a new motherboard with the required PCIe slots. 

 

I'd love to, but this is for an in place system where that option has been decided to be not an option. I'm not looking for some way to run GPUs off a server or anything.

51 minutes ago, W-L said:

What your asking for is a complicated solution, there are PCI-E splitters but anything passive will not work on regular motherboard it must use a PLX chip to communicate between the board and the splitter to basically direct traffic. The problem though lies in the PLX option and motherboard compatibility, unless your board is a server board or has a list of dedicated splitters that can be used it's all trial and error. 

 

 

 

 

It is a server board, though I know of no dedicated splitter options for it. It's a Tyan S7067 I think, I am not with the system currently. There's a need to run 2 (or three is even better, but not pushing it), expansion cards for RAID and networking applications.

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I

8 hours ago, Grimm Spector said:

Correct me if I'm wrong, but doesn't this only work with particular Supermicro boards?

I'd love to, but this is for an in place system where that option has been decided to be not an option. I'm not looking for some way to run GPUs off a server or anything.

 

It is a server board, though I know of no dedicated splitter options for it. It's a Tyan S7067 I think, I am not with the system currently. There's a need to run 2 (or three is even better, but not pushing it), expansion cards for RAID and networking applications.

Then your best bet is to contact the manufacture for details if they have any on compatible PCI-E splitter. If there isn’t any your somewhat in the dark and will have to rely on trial and error to see what works.

 

Here is a good discussion on splitting PCIE slots.

https://hardforum.com/threads/pcie-bifurcation.1870298/

 

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