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using a gpu with a pci-e 8x slot?

Ashleyyyy
By Ashleyyyy
in Graphics Cards
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i have 1 pci-e 16x slot in my pc, with my gtx 1050 in it. 

i also have a bunch of pci-e 8x slots in my pc. can i use those to use a second gpu? specifically a amd rx460?

 

i want to do this because i have 3 monitors and i like watching youtube on one of my side displays when i'm gaming on my center display. 

so i want to run the other displays of that rx460. is this possible?

She/Her

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If it's just acting as a display adapter, you should be able to run displays off of it. Why not just run them all off the 1050 though, it has enough ports.

Quote or tag me( @Crunchy Dragon) if you want me to see your reply

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well you can install GPU's into any full length slot, mixing models is a different story, especially different manufactures.

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1 minute ago, Crunchy Dragon said:

If it's just acting as a display adapter, you should be able to run displays off of it. Why not just run them all off the 1050 though, it has enough ports.

the point is that i can't plug that rx460 in.. it doesn't fit in an 8x slot. i'm wondering if there are adaptors or something to make it work. 

i have all of them in the 1050 now, but the issue is that watching youtube while gaming makes my fps go down. 

 

2 minutes ago, Daniel644 said:

well you can install GPU's into any full length slot, mixing models is a different story, especially different manufactures.

i have ran amd and nvidia gpu's together fine with other pc's, but my current one has a server motherboard, and only 1 pci-e 16x slot.. 

so i need a way to install a gpu in an 8x slot. i was thinking of some kind of adaptor but i don't know if that exists. 

She/Her

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2 minutes ago, firelighter487 said:

the point is that i can't plug that rx460 in.. it doesn't fit in an 8x slot. i'm wondering if there are adaptors or something to make it work. 

i have all of them in the 1050 now, but the issue is that watching youtube while gaming makes my fps go down. 

 

i have ran amd and nvidia gpu's together fine with other pc's, but my current one has a server motherboard, and only 1 pci-e 16x slot.. 

so i need a way to install a gpu in an 8x slot. i was thinking of some kind of adaptor but i don't know if that exists. 

well I found this cable, not sure how safe it is to use https://www.walmart.com/ip/PCI-Express-8X-Male-to-PCI-E-16X-Female-Riser-Cable/302773967?wmlspartner=wlpa&selectedSellerId=3851&adid=22222222227070210205&wmlspartner=wmtlabs&wl0=&wl1=g&wl2=c&wl3=178040593867&wl4=pla-282301936986&wl5=9011033&wl6=&wl7=&wl8=&wl9=pla&wl10=115057149&wl11=online&wl12=302773967&wl13=&veh=sem

 

GPU's that low end don't even come close to saturating an x8 slot so there shouldn't be any performance issues.

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Just now, firelighter487 said:

so i need a way to install a gpu in an 8x slot. i was thinking of some kind of adaptor but i don't know if that exists. 

you can actually (and im not kidding) cut off the back of the 8x slot and drop in the gpu like this
 

pcie.jpg

 

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Have you already bought the RX460? The easiest solution would be to get a video card that has an x8 slot. If you have, then x8 to x16 adaptors exist though I'm not sure which one is the most reliable. Another option that the guy above me mentioned is to simply cut off the back of the slot which will work if done right. Though, I wouldn't try it unless you are comfortable with your hardware and can sacrifice your warranty for something that could potentially kill the slot and/or even your motherboard.

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Just now, Sombra said:

Have you already bought the RX460? The easiest solution would be to get a video card that has an x8 slot. If you have, then x8 to x16 adaptors exist though I'm not sure which one is the most reliable. Another option that the guy above me mentioned is to simply cut off the back of the slot which will work if done right. Though, I wouldn't try it unless you are comfortable with your hardware and can sacrifice your warranty for something that could potentially kill the slot and/or even your motherboard.

yeah i already have the rx460. i won't be cutting stuff off of the slots of my motherboard.. lga 1366 server boards are quite rare here so.. i don't want to have to replace it. 

if i get an x8 to x16 adaptor will that work guaranteed? 

 

3 minutes ago, Glenwing said:

If they're open-back x8 slots, then yes you can just plug the GPU right in.

i don't think so.. 

She/Her

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1 minute ago, Sombra said:

that's an x1 slot. Is that what's on your motherboard?

no. i have 1 x16 slot and the rest are x8. 

 

EDIT: but that would fit in an x8 slot right?

She/Her

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Just now, firelighter487 said:

no. i have 1 x16 slot and the rest are x8. 

 

EDIT: but that would fit in an x8 slot right?

what motherboard do you have?

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Just now, Sombra said:

what motherboard do you have?

i have a server motherboard. it is a HP ProLiant ML350 G6.

She/Her

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1 minute ago, firelighter487 said:

i have a server motherboard. it is a HP ProLiant ML350 G6.

Ok. The adaptor you linked is a x1 to x16 which should work but I'd recommend getting an x8 to x16 just for that extra bandwidth. Either way though, just watching youtube and web surfing may work fine with either setup and if not, it shouldn't be a problem to swap adaptors.

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5 minutes ago, firelighter487 said:

no. i have 1 x16 slot and the rest are x8. 

 

EDIT: but that would fit in an x8 slot right?

It will work, just not the way we usually do it (that is, cutting the back of the slot).

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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Just now, Sombra said:

Ok. The adaptor you linked is a x1 to x16 which should work but I'd recommend getting an x8 to x16 just for that extra bandwidth. Either way though, just watching youtube and web surfing may work fine with either setup and if not, it shouldn't be a problem to swap adaptors.

so if i get an x1 to x16 it will bottleneck? but yeah i'm only going to use that card to watch youtube and stuff. 

She/Her

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7 minutes ago, firelighter487 said:

so if i get an x1 to x16 it will bottleneck? but yeah i'm only going to use that card to watch youtube and stuff. 

x1 is an eighth of the bandwidth of x8 but I'm not sure how that will apply to that workload due to my limited knowledge and experience in this area. Hopefully, someone who knows more will chime in to answer that question.

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1 minute ago, Sombra said:

x1 is an eighth of the bandwidth of x8 but I'm not sure how that will apply to that workload due to my limited knowledge and experience in this area. Hopefully, someone who knows more will chime in to answer that question.

it's okay. that adaptor i linked is cheap anyway. i'll just buy it and see if it works at all.  i already have the gpu so.. 

She/Her

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Just now, firelighter487 said:

it's okay. that adaptor i linked is cheap anyway. i'll just buy it and see if it works at all. 

yep, trying out different adaptors can't hurt. I'd be interested to see how this experiment ends up.

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1 minute ago, Sombra said:

yep, trying out different adaptors can't hurt. I'd be interested to see how this experiment ends up.

i'll let you know.

She/Her

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On ‎12‎-‎5‎-‎2018 at 4:51 AM, Sombra said:

yep, trying out different adaptors can't hurt. I'd be interested to see how this experiment ends up.

ok, *drumroll*, it works. very well even. using the 1x to 16x adaptor i can easely get 60+fps in Overwatch using my rx460 on one of the side displays. 

 

but, weirdly, the Windows desktop is very laggy and watching youtube in chrome uses both the gpu's for some reason while only being on one display... and it uses like 70% of the rx460 doing that.. i'm gonna investigate that a little bit. 

 

EDIT: it's only google chrome that's laggy.. 

She/Her

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@Sombra i removed the RX 460 for now... i have some very weird issues within Windows with it...

She/Her

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cant you just use the on board gpu for watching youtube?

Firestrike 
i7-8700k @5.0GHz w/ 1.30v, Corsair h100iv2, Gigabye Aorus gaming 7, 16GB(8x2) 2666MHz ddr4, Dual RX470's OC'd to 1390mhz(atm) in corssfire - liguid cooled with corsair h60's, 3.25 TB in Samsung SSD's, anidees white crystal cube case 

 

Retired:
i5-4440k @3.2GHz, gigabyte ga-z87x-ud5h z87, 24GB DDR3, 3x1TB Seagate Baracuda HDD.

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40 minutes ago, firelighter487 said:

@Sombra i removed the RX 460 for now... i have some very weird issues within Windows with it...

What kind of issue?

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