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English => Reviews => Topic started by: Redaktion on September 03, 2022, 11:52:17

Title: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: Redaktion on September 03, 2022, 11:52:17
With the new Yoga 7, Lenovo offers an very exciting 14-inch convertible that uses the latest AMD Ryzen 7 6800U. Performance values are very good, but is the rest of the device also up to scratch? Is the Yoga 7 perhaps even better than the Yoga 9i?

https://www.notebookcheck.net/Lenovo-Yoga-7-14-G7-review-Multimedia-convertible-shines-with-AMD-Ryzen-7-6800U.645586.0.html
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: Jose Hidalgo on September 03, 2022, 12:42:06
Too bad it's not available in 16" yet. Why should 16" be reserved only to Intel? WTF Lenovo??...
Also, in France the specs are not the same. For example, 1 TB SSD can't be selected.
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: NikoB on September 03, 2022, 13:31:06
Again absolutely disgusting tuning of LPDDR5 6400, extremely low data transfer rate for this standard in dual-channel mode (еhis is a strong impact on iGPU(max impact in 2D external monitors in 4k+ and 3d) gpu performance and software like Photoshop). I also want to note that the motherboard is not vibration/impact-resistant, which is clearly visible in the photo (even the cheap Huawei D16 ver.2022 has a board reinforced with port mounts, although without a metall mounting chassis for it as thinkpad series). In fact, this series is a toy that is not even close to the Thinkpad T+ in terms of durability, it not a laptop for frequent travel with it. At the same time, the model will get with its noisy even in an average office load and heavy surfing, if the coolers turn on periodically, and do not spin monotonously at the same speed...

Well, I pay attention to the fact that OLED is a shameful with a native contrast of only 7000: 1 (instead of the "endless" contrast or typical 100,000: 1+ for OLED without dimming schemes promised, but it flicker and increases fatigue.
Unlike ASUS, which at least a with decrease in the dynamic range due to dimming schemes, it was possible to allegedly eliminate flickering with a parallel sharp drop in the native contrast by orders of magnitude, Lenovo engineers could not achieve any of the goals.
The super contrast and zero level of black (only in complete darkness, of course) destroyed, but the flicker is still not eliminated. What is the meaning of such a panel is ��not clear to me. Or OLED super contrast or lack of flickering with low contrast. Or so or so.

I also note that the resolution of the OLED screen, which is clearly visible in the macrophoto, is clearly lower than the stated if the IPS panel with the same declared resolution was installed. Well, the fact that glossy panel adds problems of use in difficult environment with many light sources on the side and in back - all glare for you...

Again, I draw attention to the fact that nothing prevented the developers from installing a compact (folding) version of RJ45/(2.5Gbps+) on the left. It would be worth a penny, bring the port from SoC. All the same, use is comfortable only with an external monitor and a keyboard. But then why do you need an unstable Wi-Fi, instead of a stable cable connection, if it is in the place of use?

Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: RobertJasiek on September 03, 2022, 14:04:45
Quote from: NikoB on September 03, 2022, 13:31:06Again absolutely disgusting tuning of LPDDR5 6400, extremely low data transfer rate for this standard in dual-channel mode

Please explain how we can understand this from the benchmark data!
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: q on September 03, 2022, 14:55:14
this review is lacking info about temperatures on CPU (and GPU since its integrated) and the level of throttling. One fan only and not that much heatpipes is worrysome
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: kamarul on September 03, 2022, 19:47:33
Did you enable Rapid Charge (in Lenovo Vantage > Device > Power) before testing the feature?

Still waiting for a 16:10 17" Lenovo in the LG Gram form factor, with Ryzen inside :(
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: LL on September 03, 2022, 19:48:27
Reflective screen kills it. What is the point of a mobile laptop that can't be used outside?

Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: NikoB on September 03, 2022, 20:59:35
Quote from: RobertJasiek on September 03, 2022, 14:04:45
Quote from: NikoB on September 03, 2022, 13:31:06Again absolutely disgusting tuning of LPDDR5 6400, extremely low data transfer rate for this standard in dual-channel mode
Please explain how we can understand this from the benchmark data!
This is clearly seen from the reviews of laptops with the same memory pumping in the region of 67-68Gb/s. Here everything is very bad, according to the tests.
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: NikoB on September 03, 2022, 21:11:17
Quote from: RobertJasiek on September 03, 2022, 14:04:45Please explain how we can understand this from the benchmark data!
See newest review  Dell XPS 13 Plus 9320 (notebookcheck.net/All-three-Dell-XPS-13-Plus-9320-SKUs-in-review-Core-i5-1240P-i7-1260P-or-i7-1280P-OLED.644466.0.html)
What do you see there, Robert? Memory is MUCH slower in characteristics than in this yoga - only lpddr5 5200 in Dell XPS! And what do we both see in practice? It smashes lpddr5 6400 in Yoga to smithereens. Lenovo engineers disgraced themselves to the fullest... =)
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: Russel on September 03, 2022, 23:33:10
OLED, PWM flickering......

So no...
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: Dorby on September 04, 2022, 21:36:32
This is probably my favorite laptop in a long while.

- tablet capability
- real HDR screen
- GPU that can handle HDR playback (12th-gen iGPU cannot do this)
- big battery
- portable size & weight
- no cutback on I/O ports
- usable webcam and mic
- big glass touchpad
- good speakers (sounds good to me)
- The keyboard is average but I can live with that, given how excellent the overall quality is

Pretty much what I wanted my 2015 "infinity-edge" Dell XPS 13 to be in 2022, if Dell hadn't dropped the ball.
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: LL on September 05, 2022, 05:52:11
- GPU that can handle 4K source video playback (12th Gen i7 Iris XE cannot do this)

That is incorrect , it is the 12th Quicksink video that can handle all HEVC versions due to hardware decoding that the AMD do not have,
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: Dorby on September 05, 2022, 09:29:02
Quote from: LL on September 05, 2022, 05:52:11- GPU that can handle 4K source video playback (12th Gen i7 Iris XE cannot do this)

That is incorrect , it is the 12th Quicksink video that can handle all HEVC versions due to hardware decoding that the AMD do not have,
To be specific I am talking about real time tone-mapping of HDR10 source files. AMD 680M, Apple M2, and Nvidia GPUs can all do this while Intel Iris XE cannot. Also you are incorrect, Radeon iGPU does support both native H265 and AV1 decoding.

You could technically watch a high-bitrate HDR video on an Intel iGPU laptop, but the result would be either very choppy framerates or poor quality mapping.
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: LL on September 05, 2022, 12:19:11
"Radeon iGPU does support both native H265 and AV1 decoding."


It does not, it can't decode H.265 10bit chroma 4:2:2 neither Nvidias do, but Intel can . I have experience but if you doubt, go to Puget website and search for page with H.265 capabilities.
Several cameras and even smarthphones are outputting that chroma.

You want to deal with video editing you go Intel preferably 12th generation, but 11th also could do that.
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: NikoB on September 05, 2022, 13:49:17
Quote from: Dorby on September 04, 2022, 21:36:32- real HDR screen
You lie. Static HDR reqired maximum 0.005 nit black level and native (ansi) contrast from 100000:1. "OLED" screen in this laptop only 7000:1.

Forget about HDR support. At the same time, Lenovo did not declare support for Dynamic HDR (HDR10 +) or Dolby Vision (DV) versions (as, for example, in Legion 5 Pro with IPS matrices), but only these versions can work with matrices with low contrast and high black levels. Lenovo engineers were completely embarrassed with the screen of this Yoga, as I already wrote - neither you have a contrast of 1000000: 1, nor the absence of flicker (as in Asus versions with low contrast, but without OLED flicker)

Quote from: LL on September 05, 2022, 05:52:11GPU that can handle 4K source video playback (12th Gen i7 Iris XE cannot do this)
You are talking technical nonsense. Even i5 2018 shows smoothly 4k@60Hz in HDR mode without any problems with conversion via MADVR to Rec.709 from Rec.2020 on the fly.

Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: NikoB on September 05, 2022, 13:52:27
NVidia/Intel have decoder H265(HEVC) with 4:4:4 10 bits mode. Intel with Ice Lake. NVidia from GTX3xxx.
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: NikoB on September 05, 2022, 13:58:56
Surprisingly, it was AMD that turned out to be the remaining company in video technology. It didn't have TB3.0-4.0 and didn't have an 8k decoder when Intel already had one. It didn't have an AV1 decoder when Intel already did. AMD is just catching up with Intel, but not vice versa in terms of features in SoC. And starting with Alder Lake, it has nothing to offer customers except autonomy, before their processors were faster (they are now faster), and Intel they were slower even with higher consumption, but now Intel processors are faster, although they consume more. The jump in speed gain per 1W of consumption in 2021 for Intel was more than 60%+, and for AMD only a miserable 10%. AMD is rapidly losing its leadership position in the energy efficiency of cores. In fact, taking into account TSMC those processes, back in 2020 I proved by numbers that Intel processors are more efficient if they were made at 7nm. AMD was a technically lagging company, so it is. It has taken the lead by 3 years through access and skillful use of TSMC's processes, but AMD's good times are coming to an end. And investors from all over the world are sensibly assessing its chances - its shares have been plummeting for many months.
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: LL on September 05, 2022, 15:25:38
4:4:4 is not an issue.

The preference for 4:2:2 is file size in it does have compression so can be smaller. 4:4:4 do not have compression.

Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: NikoB on September 05, 2022, 18:35:23
Almost all commercial and amateur (on YouTube) video content is in 4:2:0. People don't need the meaningless 4:2:2 either. Who needs full quality - they write in 4:4:4 without color loss. Support for 4:4:4 has long been announced by NVidia and Intel, and AMD, as usual, hides all the specifications, it's impossible to find anything on their website. They even began to publish extended data about processors from 2022 only! I somehow tried to reliably get support max mem by cpu mem controllers from them, so their support could not even clearly answer the question according to the information that Intel clearly lays out right away for all series. While Intel has begun to hide the peak bandwidth of memory controllers for a particular type of installed memory, for example, in view of the apparent inconsistency of their declarations with past practice. At AMD, it's just not healthy to get complete datasheets for fresh processor lines and their built-in igpu without wild ordeals.

Moreover, they announced 4k support back in Zen+, but in practice it turned out that their iGPU simply does not support 4k@60Hz - continuous drops and the load on the iGPU is above 60% is simply monstrous (against the background of smartphones). As a result, in 2020, AMD recognized the impossibility of hardware smooth decoding in Zen+ and Zen2 and made a hybrid decoder for them - which dramatically increased the load on the CPU part (from 5-7% to 15% and higher on YouTube in VP9). But the drops are still there in Chrome.

If we talk about absolutely smooth playback of 4k@60fps, then in practice, NONE of this trio - AMD/NVidia/Intel - provides smooth playback of 4k@60Hz with VSync on their chips. Occasionally, drops or a visible disruption of synchronization (VSync) occur (even if there are allegedly no drops according to statistics).

Until there is an ideal playback like hardware players or how the chips of this trinity can play fhd@60fps for hours without visible VSync disruptions, it is impossible for those who are in the subject to give them 100% playback quality.
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: LL on September 05, 2022, 18:57:57
Some cameras and smartphones do not record at 4:4:4.

I am playing a HEVC Mov(mp4) 5728x3024 at 59.94fps total bitrate 295mb/s  4:2:0

5800H is at 8% , RTX3060 at 64%.
 

Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: Dorby on September 05, 2022, 19:51:41
Quote from: LL on September 05, 2022, 12:19:11"Radeon iGPU does support both native H265 and AV1 decoding."


It does not, it can't decode H.265 10bit chroma 4:2:2 neither Nvidias do, but Intel can . I have experience but if you doubt, go to Puget website and search for page with H.265 capabilities.
Several cameras and even smarthphones are outputting that chroma.

You want to deal with video editing you go Intel preferably 12th generation, but 11th also could do that.
Again, I am talking about decoding in terms of video consumption (both local and streaming). Maybe you are thinking about production side? (I wouldn't know) which is completely irrelevant, as ultrabooks are not designed for that kind of work anyway.
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: LL on September 06, 2022, 10:27:46
You are right there is a difference when a player opens a movie and when put it in timeline of an editing application. The application needs to put the movie in 32 bits for editing (unless proxies and other tricks) so it is much heavier.

But...regardless of that,if the player cannot  decode from the hardware decoder it will tax the CPU normal cycles. So you can see your H.265 playing 4:2:2 probably without hiccups if the resolution is not too big but it will use the CPU heavily making it less comfortable noise experience.

Example i have
a 10bit 4:2:2 3840x2160  24 fps 89.6 Mb/s bit rate
 5800H go to 55%   3060 is at 16%

a 10bit 4:2:0  5728x3024  60fps  295Mb/s bit rate
5800H go to 9% the RTX3060 is around 60%.
Title: Re: Lenovo Yoga 7 14 G7 review: Multimedia convertible shines with AMD Ryzen 7 6800U
Post by: Kiran on December 02, 2022, 11:25:54
How well would this laptop perform in music DAWs like FL Studio? Is the CPU and video card enough to run a whole project without lag?