2019 15" Dell XPS 15 7590 (GTX1650) [9th, 6C, H] + RTX 2070 @ 32Gbps-TB3 (Razer ...
 
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2019 15" Dell XPS 15 7590 (GTX1650) [9th, 6C, H] + RTX 2070 @ 32Gbps-TB3 (Razer Core X Chroma) + Win10 [Emmanuel Barinia]  

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(@emmanuel_barinia)
New Member
Joined: 4 weeks ago
 

System specs  

Dell XPS 15 7590 GTX 1650 (15" OLED 4k, i7 9750h, 16gb DDR4, 2tb Corsair MP510) 

Acer Predator X34P (120hz, 3440x1440, IPS, G-Sync) 

  

eGPU hardware  

EVGA RTX 2070 XC ULTRA 8gb 

Razer Core X Chroma 

CHOETECH 2m active TB3 cable 

  

Installation steps  

Installation was rather plug and play compared to my previous RX 5700 XT. No need to reinstall older windows version or anything. Just plug, install drivers, and play. 

- run DDU in windows Safe Mode to get rid of both AMD and NVIDIA drivers available 

- downloaded and installed latest Cuda drivers.  I read here that normal driver could worsen battery life, so I have followed the instruction indicated here:  https://egpu.io/forums/builds/2018-15-razer-blade-15-gtx-1080ti32gbps-tb3-asus-xg-station-pro-win10-1803-itsage/#post-63079  

  

Benchmarks 

Now this is where it gets quite confusing for me. I know that the XPS 15 with dGPU is not ideal for an eGPU setup because of many many issues: Thunderbolt connected to the PCH (so even more performance loss), PCH temperature and potential throttling, poor CPU/dGPU cooling due to inadequate small chassis, Optimus which seems to be causing me another layer of problem... I mean, I chose this laptop with media consumption in mind, and the eGPU was an after thought for me. Sadly, not every Thunderbolt laptops are born equals. 

Now, I think I have addressed most of these issues by doing the following: 

- I changed the original thermal paste with liquid metal and undervolted my CPU to -150mV. This means that my CPU temperature never reaches more than 80 degrees on an 6 hours Aida64 

- The 7590 (unlike the 9570 I had before) has a thermal pad (quite thick, about 3mm) already installed. HwInfo reported temps of 65 max. I have added another layer of 1.5 pads in order to make contact with the aluminium chassis, this has dropped PCH temperature further down to a maximum of 55, which I hope is enough not to thermal throttle. 

 

Apologies for the links, I seems to be unable to post photos directly. Please note that all of the results below are with OC of 125mhz/600mhz applied to the GPU.

---------------------------------------------------------

CUDA-Z report: https://imgur.com/q4nUkCa  

GPU Z report: https://imgur.com/0heRRDz

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External Display:

Superposition 1080p - 14223: https://imgur.com/hKupopw

Superposition 4k - 7105: https://imgur.com/oLWGO2J

Unigine Valley - 93fps: https://imgur.com/qsNln7b

Firsestrike - 14530: https://www.3dmark.com/fs/21662178

Timespy - 7915: https://www.3dmark.com/spy/10407625

---------------------------------------------------------

Interlnal Display:

Superposition 1080p - 10614: https://imgur.com/undefined

Superposition 4k - 6492: https://imgur.com/undefined

 

And... sadly this is as far as my internal display benchmarks could go. I seems to be unable to add Unigine valley to the graphics setting options in windows to enable it to be used with the eGPU, so it is rendered at 5fps. Same goes for 3dMark (the steam version). 

 

As mentioned earlier, I had a RX 5700 XT prior to the RTX 2070, and even though my TimeSpy benchmark for both are quite similar, my Firestrike benchmark was much higher with the AMD card, at 17869 - https://www.3dmark.com/fs/21624601 Any idea what would be the reason for this?

Comments

All in all, I guess I'm a little bit underwhelmed by the performance. Granted, the eGPU setup allows me some flexibility and portability, but I guess the fact that the Thunderbolt is connected to the PCH makes the overall performance a little bit slower than I anticipated. I saw XPS 13 build with slower CPU getting better results, I assume simply because of the way the thunderbolt is connected directly to the CPU.

 

I will conduct more research on the internal display performance. A Superposition drop of 4000 points seems rather suspicious at 1080p, although the 4k benchmark is about where I would expect it compared to the external display. If anyone has any tip on how to improve the internal/external display performance, I'm all hear.

XPS 15 7590 i7-9750h / EVGA RTX 2070 XC Ultra / Razer Core Chroma


nando4, Mini i5 and itsage liked
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Mini i5
(@mini-i5)
Estimable Member
Joined: 6 months ago
 

@emmanuel_barinia

Those benchmark discrepancies aren’t too surprising.

TB3 performance loss (during loopback to the internal display) occurring at a much higher rate at 1080p than 4K is to be expected.

Nvidia RTX card performance can vary a lot on DX11 games. Sometimes performance is better, but a DX11 test (like Firestrike) being surprisingly low is also something that happen.

This post was modified 3 weeks ago

2018 Mac Mini i5 / 6-core 3.0-4.1 Ghz / 32GB / 256GB / Intel UHD 630 / PowerColor Gaming Station / PowerColor dual-fan RX5700 XT / Mac OS 10.15.3 Catalina / LG 27" 4K display


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pazza
(@pazza)
New Member
Joined: 3 weeks ago
 

Hm. Thank you for making this thorough post. I love the XPS series (have had the last three) and was hoping to upgrade to the 7590/i7-9750/FHD. Would be using a Razer Core X (was thinking 1080ti/2070s or greater) to power an external 3k monitor (HP z34c) and/or my Valve Index (really only care about HL:Alyx when it drops), but it seems as though this is not a good option.

 

Given what you know now, what would you do different?

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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