Which brand or eGPU?

[MONkittsan]

Hi, I've gotten myself a EXP GDC V8 Beast eGPU adapter for which I will be achieving PCI-E 1x Gen 2 speeds of 500MB/s.

Now my question is which brand of GPU, AMD and Nvdia, would perform better at these lower bandwidths? I have a Intel i5 4570R so there should be no CPU bottleneck. The GPUs that im looking at are the 750ti or the r7 370 so how much will these cards be effected by the slow PCI-E bandwidth?

Any information will be greatly appreciated.

Thanks

[don_svetlio]

PCIe 2.0 1x will bottleneck ANYTHING even Intel HD graphics. You wasted your money

[MONkittsan]

1 minute ago, don_svetlio said:

PCIe 2.0 1x will bottleneck ANYTHING even Intel HD graphics. You wasted your money

Many people have used this product ad most show a performance level of 70% compared to x16. Im just not sure which brand is affected more.

[shadowbyte]

the titan x will thrive in this scenario

[MONkittsan]

1 minute ago, shadowbyte said:

the titan x will thrive in this scenario

And my wallet would explode

[don_svetlio]

1 minute ago, MONkittsan said:

Many people have used this product ad most show a performance level of 70% compared to x16. Im just not sure which brand is affected more.

Brand has NOTHING to do with this - as for what people have "reported" - it's total BS. PCIe 3.0 4x or PCIe 2.0 8x is the MINIMUM allowed nowadays - anything bellow it WILL. NOT. WORK.

[don_svetlio]

1 minute ago, MONkittsan said:

And my wallet would explode

[MONkittsan]

2 minutes ago, don_svetlio said:

Brand has NOTHING to do with this - as for what people have "reported" - it's total BS. PCIe 3.0 4x or PCIe 2.0 8x is the MINIMUM allowed nowadays - anything bellow it WILL. NOT. WORK.

Take a look at this video. It seems to work fine and it would be a clear advantage compared to my integrated graphics

[don_svetlio]

1 minute ago, MONkittsan said:

Take a look at this video. It seems to work fine and it would be a clear advantage compared to my integrated graphics

Do you have ANY idea how OLD 4330 is? Intel HD 4600 is several times faster than that card. Of course it will work with a card from 2007....

[MONkittsan]

1 minute ago, don_svetlio said:

Do you have ANY idea how OLD 4330 is? Intel HD 4600 is several times faster than that card. Of course it will work with a card from 2007....

Im planning on a r7 370 or 750ti which are both entry level gpus so it shouldn't matter that much

[don_svetlio]

1 minute ago, MONkittsan said:

Im planning on a r7 370 or 750ti which are both entry level gpus so it shouldn't matter that much

It does - both the 750 Ti and R7 370 are over 10 times faster than the 4330 and as such need 10 times more bandwidth. Again, you are going to end up with LESS performance than your iGPU....

[MONkittsan]

2 minutes ago, don_svetlio said:

It does - both the 750 Ti and R7 370 are over 10 times faster than the 4330 and as such need 10 times more bandwidth. Again, you are going to end up with LESS performance than your iGPU....

Well I wasted AU$70 then....

[don_svetlio]

1 minute ago, MONkittsan said:

Well I wasted AU$70 then....

Yup, you did. This is why you ask first and buy stuff later.

[MONkittsan]

1 minute ago, don_svetlio said:

Yup, you did. This is why you ask first and buy stuff later.

I bought because everything I read showed performance gains.

https://www.techinferno.com/index.php?/forums/topic/7625-17-acer-v3-771g-gtx980ti4gbps-mpcie2-exp-gdc-beast-win764-rgpu/

[don_svetlio]

2 minutes ago, MONkittsan said:

I bought because everything I read showed performance gains.

https://www.techinferno.com/index.php?/forums/topic/7625-17-acer-v3-771g-gtx980ti4gbps-mpcie2-exp-gdc-beast-win764-rgpu/

Take a close look at his screenshot - the 980 Ti is running at PCIe 2.0 16x, not 1x. That is the reason why it works for him and will not work for you

[MONkittsan]

2 minutes ago, don_svetlio said:

Take a close look at his screenshot - the 980 Ti is running at PCIe 2.0 16x, not 1x. That is the reason why it works for him and will not work for you

https://www.techinferno.com/applications/core/interface/imageproxy/imageproxy.php?img=http%3A%2F%2Fs24.postimg.org%2Fi0ajx4vxh%2Fgpuz.png&key=b04846bcc570466009540c971df7a06802ec986e89d7a1e6ba013ca8864359ff

For the 970 it shows 1x

[don_svetlio]

1 minute ago, MONkittsan said:

https://www.techinferno.com/applications/core/interface/imageproxy/imageproxy.php?img=http%3A%2F%2Fs24.postimg.org%2Fi0ajx4vxh%2Fgpuz.png&key=b04846bcc570466009540c971df7a06802ec986e89d7a1e6ba013ca8864359ff

For the 970 it shows 1x

In that case it should definitely not work - Nvidia drivers don't allow for anything lower than 4x/8x IIRC

[MONkittsan]

1 minute ago, don_svetlio said:

In that case it should definitely not work - Nvidia drivers don't allow for anything lower than 4x/8x IIRC

Hmm strange, this guy has it going as well

 

[don_svetlio]

3 minutes ago, MONkittsan said:

Hmm strange, this guy has it going as well

 

At what speed? I don't see him showing it in this video - if the GPU is running at 16x then it will likely work, it will be laggy due to the delay but it will work. 1x will not, that I can guarantee.

[MONkittsan]

1 minute ago, don_svetlio said:

At what speed? I don't see him showing it in this video - if the GPU is running at 16x then it will likely work, it will be laggy due to the delay but it will work. 1x will not, that I can guarantee.

The EXP GDC V8 that he is using (I have one too) runs at pcie 2.0 1x at maximum. It plugs into mPCIE or Expresscard slot

[don_svetlio]

1 minute ago, MONkittsan said:

The EXP GDC V8 that he is using (I have one too) runs at pcie 2.0 1x at maximum. It plugs into mPCIE or Expresscard slot

The ExpressCard has a maximum throughput of 2.5 Gbit/s through PCI Express and 480 Mbit/s

PCIe 2.0 doubles the per-lane throughput to 5GT/s, which gives us 500MB/s of actual data transfer per lane.

 

Nvidia SLI requires a minimum of PCIe 3.0 x8 for each GPU (that is the equivalent to PCIe 2.0 x16) and has 40GB/s - you are working with 2.5GB/s per lane. If you are working with 16 lanes you get 16x2.5=40GB/s. Let's assume that a GPU needs about 28GB/s to work comfortably - that is still MUCH more than what you have, unless there's something you aren't telling me. Look at the Alienware AMP or Razer Core - each have a minimum of 28GB/s bandwidth available to the GPU

[MONkittsan]

5 minutes ago, don_svetlio said:

The ExpressCard has a maximum throughput of 2.5 Gbit/s through PCI Express and 480 Mbit/s

PCIe 2.0 doubles the per-lane throughput to 5GT/s, which gives us 500MB/s of actual data transfer per lane.

 

Nvidia SLI requires a minimum of PCIe 3.0 x8 for each GPU (that is the equivalent to PCIe 2.0 x16) and has 40GB/s - you are working with 2.5GB/s per lane. If you are working with 16 lanes you get 16x2.5=40GB/s. Let's assume that a GPU needs about 28GB/s to work comfortably - that is still MUCH more than what you have, unless there's something you aren't telling me. Look at the Alienware AMP or Razer Core - each have a minimum of 28GB/s bandwidth available to the GPU

Well if that is the case I just don"t understand how so many people are getting great results from it. Just searching EXP GDC in google or youtube shows many videos and forums showing people using the product. I do understand that all the information that you are giving me makes it sound impossible but all the other evidence proving that it works is working against your evidence. So I don't really know how to respond to you any more as our information is just contradicting each other. 

[don_svetlio]

1 minute ago, MONkittsan said:

Well if that is the case I just don"t understand how so many people are getting great results from it. Just searching EXP GDC in google or youtube shows many videos and forums showing people using the product. I do understand that all the information that you are giving me makes it sound impossible but all the other evidence proving that it works is working against your evidence. So I don't really know how to respond to you any more as our information is just contradicting each other. 

Thing is - half your sources back me up - the thread you linked shows PCIe 2.0 16x meaning that there IS a way to get it working. I don't know if you are missing part of the technical details or there is something more to it but I can assure you this - if you can get it at 16x it WILL work, if you have it at 1x it WILL NOT work. 4x is a gamble, 8x should work as well.

[MONkittsan]

1 minute ago, don_svetlio said:

Thing is - half your sources back me up - the thread you linked shows PCIe 2.0 16x meaning that there IS a way to get it working. I don't know if you are missing part of the technical details or there is something more to it but I can assure you this - if you can get it at 16x it WILL work, if you have it at 1x it WILL NOT work. 4x is a gamble, 8x should work as well.

But the problem is that EXP GDC 'DOES NOT' those speeds. So the fact that people are using it must mean that they are running it at a much slower speed. 

http://www.banggood.com/Mini-PCI-E-Version-V8_0-EXP-GDC-Beast-Laptop-External-Independent-Video-Card-Dock-p-1011222.html

Here is the link to the exact product. It has all the information and capabilities of EXP GDC eGPU.

[xDanielxOossiex]

49 minutes ago, MONkittsan said:

And my wallet would explode

Sure it's not going to implode if you buy a Titan X? ?