The main problem of AMD’s RDNA 3 graphics cards for laptops (except 7600S and 7600M XT) is the chiplet design and consumption. AMD uses TSMC 5nm for the graphics core and 6nm for the MCDs. Why? Because in the production process it is cheaper to make more smaller chips per wafer and 5 and 6nm are cheaper.TSMC 3-4nm wafers are more expensive than 5-6nm and bigger the chip, the less it will be per wafer. For example, 3nm costs 20,000 usd per wafer and 2nm will cost 25,000 usd per wafer in the future. Chiplet design and savings in production lead to problems with consumption. The same story is with mobile Dragon Range processors (R7-7745HX, R9-7845HX, R9-7945HX). Monolithic chips R9-7940HS (4nm) and 7600S in Asus TUF A16 are more efficient and its battery lasts 12-20 hours, while chiplet Alienware m18 R9-7945HX and 7900M lasts 85 minutes due to high idle consumption. Of course, the 7900M is much stronger than the 7600s, but when compared to laptops with i9-13900HX and 4080 that hold the battery for 3-4 hours, AMD is in trouble. This is probably the reason why other OEMs will not put AMD 7800M 12GB and 7900M 16GB in laptops. The RX-7700S does not have it anywhere on the Asus website with a written configuration. That chip is a monolithic, more precisely, a more efficient version of the 7600M XT.
These numbers are what i was expectingfrom the wall Witcher 3 power consumption
216 for 7900m309 for 4090 version
This is for about a 10% framerate difference. Though 1080p seems a bad way to compare these chips. Guessing this is other things like screen, cpu etc but still a huge difference for a chip which is suppose to be horrible with efficiency due to chiplets.
They literally isolate GPU-only power draw in the review, so you know the 4090L is pulling 161 W to the 7900M’s 179 W. For 28% more FPS, not 10%
The higher power draw is mostly from the CPU. Efficiency complaints - at least for the CPU - are largely around idle power.
Raw numbers sure but 7900m is brought down by dips. Look at the chart its normally running about 10% behind.
You can really compare from wall, AMD and Nvidia measure their draws differently. Nvidia actually measures their draw, AMD does some strange estimate stuff based on measurements from other parts of the board. The furmark does test from the wall I think.
Gee I love dips in my framerate, good thing my eyes see normal framerate and turn off when there are stutters!
7945HX is pulling 42 watts on idle here holy crap
Idle rarely ever is AMD CPUs’ strong suit.
Consumption when idling on desktop is not optimized which may contribute to the very short battery life. We’re sometimes able to measure a consumption level as high as 101 W even when on the Balanced power profile with no active applications running. Consumption on standby mode would also be very high at 25 W when it should be closer to just 1 or 2 watts.
The model does not support charging via USB-C unlike on most other modern gaming laptops and so you’re essentially tethered to the ginormous 330 W AC adapter when traveling.
Idle average was reported as 55wats, granted that’s with the crazy issues above - however minimum idle was reported at 30wats, not great…
My scar 17 R9 7945HX
At idle it was pulling 20 Watts
This all AMD machine idle power drain. so,damn high
Laptop CPUs typically target around 1W idle. 5W is more typical for the entire system. That results in around 11h battery life.
Despite knowing RDNA3, people still hyped this as on 4090M territory
The only thing going for this laptop is 7900m has +4gb vs 4080 and the cpu is slightly faster than intel. Other than that it loses in basically everything, and some people here wonder why does amd have a low mobile marketshare.
Market share aint about good vs bad. I saw many people being forced to buy 2050s 3050s because there are not laptops at their price ranges. If amd shat out tons of budget laptops or high end laptops like this on stock that overtook the model amount nvidia had they would took over pretty fast. Because people buy these cheap alternatives and worry about its idle draw problems later in this market. Its that amd doesnt dish out many chips that laptop manufacturers make a lot of models for them