Do I need an i7?  

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Shpinxis
(@shpinxis)
New Member
Joined: 4 weeks ago
Posts: 1
November 15, 2018 6:55 am  

I'm looking at getting a Lenovo X1 Carbon 6th Gen. I kind of want to go with the i5 for better battery and temps, but I do plan on getting an eGPU at some point for it. Is it necessary to get an i7 for using an eGPU, or is the i5 sufficient? When I do get an eGPU i'll also be getting a mid-range one like a 1070 (Aorus probably). I also don't mind running games at mid/high -ish range, so I'm not trying to max out like crazy.
Thanks

Soon I will add my system & eGPU details or a build link to this my signature to give context to my posts


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ICULikeMac
(@iculikemac)
Estimable Member
Joined: 1 year ago
Posts: 111
November 15, 2018 10:11 am  

i7 usually gives you hyper threading, just think of that as virtual cores (computer thinks it has more cores), without going into too much depth to answer your question, the i7 may not make the games run much faster but will be smoother.

2018 13" Macbook Air
Late 2012 Mac Mini - MacOS + Win10
Asus XG Station Pro (Vega 64 295TDP)


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Arbystrider
(@arbystrider)
Active Member
Joined: 1 year ago
Posts: 18
November 16, 2018 9:03 am  

https://www.notebookcheck.net/Lenovo-ThinkPad-X1-Carbon-2018-WQHD-HDR-i7-Laptop-Review.284682.0.html#Performance
>implying the X1C can even reach full turbo clocks for more than a few seconds
It seems to me that due to morbid thermal and power throttling, the CPU specification is mostly meaningless on modern thin and light machines.

My 2013 12" X230T can hold 25W CPU package power at its dual-core turbo clock of 3.4GHz 24/7 with temps never exceeding 90C at 30C ambient on an i7-3520M. Lelnovo needs to bring sensible cooling and power targets back to mobile systems.

i7-8550U: https://www.notebookcheck.net/Intel-Core-i7-8550U-SoC-Benchmarks-and-Specs.242108.0.html
i5-8350U: https://www.notebookcheck.net/Intel-Core-i5-8350U-SoC-Benchmarks-and-Specs.242174.0.html

The median scores for both of these CPUs is (mostly) identical, within margin of error. The i7-8550U has a higher max score, yes, for that one laptop that has a sensible cooler and cTDP that can actually clock higher for a reasonable amount of time. So I ask you: Are you going to shell out $200 for such a small (~3%) performance increase?

TL;DR: No, you don't "need an i7".

ThinkPad X230t, i7-3520M @ 2.9 GHz, Windows 7
EVGA GTX 1070 Hybrid, 2113 MHz @ 1043 mV
x1.2Opt, PE4C V3.0, 4Gbps-EC2


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Maven
(@maven)
Trusted Member
Joined: 2 years ago
Posts: 60
November 16, 2018 9:52 am  
Posted by: Shpinxis

I'm looking at getting a Lenovo X1 Carbon 6th Gen. I kind of want to go with the i5 for better battery and temps, but I do plan on getting an eGPU at some point for it. Is it necessary to get an i7 for using an eGPU, or is the i5 sufficient? When I do get an eGPU i'll also be getting a mid-range one like a 1070 (Aorus probably). I also don't mind running games at mid/high -ish range, so I'm not trying to max out like crazy.
Thanks

I have the X1c and it works great. Turbos sit around 3.2-3.3 on the 8550u.

I would highly suggest you go with the i7 8550u because you can spec it with 16gb of ram. The only way you can get the i5 with 16gb is with the dumb i5 v-pro upgrade.

Just get the 8550u / 16gb Version.

Also, order some Thermal Grizzly Kryonaut and repaste the CPU. Truly takes less than 30 minutes. 5 screws on the outer lid, 4 screws on the heatsink and one cable. Temps drop signifigantly!

I dumped the MacBook Pro 13" 2018 for this machine and love it. Make sure you spring for that HDR display. Its the bees knees!

I think the x1c and x1e's are 40% off right now using Lenovo perks discount.

Soon I will add my system & eGPU details or a build link to this my signature to give context to my posts


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