Are you satisfied with 30% faster than 3080Ti? NVIDIA RTX 4080 First Review: The Most Powerful 256Bit Graphics Card in History
1. Foreword: Do you really understand the power consumption of RTX 40?
The performance and energy efficiency of RTX 4090 can be said to be impeccable:
At 4K resolution, it leads the previous generation Kawang RTX 3090 Ti by more than 50% on average. The revolutionary DLSS 3 can bring several times the performance improvement. The ultra-high energy efficiency makes the actual game power consumption only 200-380W, and the temperature does not exceed 60°C… …
Of course, although the starting price of 12,999 yuan is also very “cost-effective”, it is exclusive to flagship-level enthusiasts after all.
Now, the RTX 4080 for a wider range of high-end gamers is finally here!
This time, we at KuaiTech will investigate the RTX 4080’s raster game performance, light-chasing game performance, DLSS 3 game performance, power consumption and heat dissipation, etc., so that everyone can have a comprehensive understanding of it.
1. RTX 4080 core specifications
RTX 4080 is still based on customized TSMC 4N manufacturing process, brand new Ada Lovelace GPU architecture, core number AD103, but like RTX 4090 and AD102, it is not full of blood, leaving suspense for the future RTX 4080 Ti.
The AD103 core integrates as many as 45.9 billion transistors, with an area of 378.6 square millimeters, and an integration level of more than 120 million transistors per square millimeter.
The internal composition of the AD103 core can be divided into 7 groups of GPCs, 80 groups of TPCs, and 160 groups of SMs. Each group of SMs has 128 CUDA cores, and the entire core has a total of 10,240 CUDA cores.
can be seen,AD103 itself adopts an asymmetrical design, in which 6 groups of GPCs each have 12 groups of SMs, and the last group of GPCs only has 8 groups of GPCs.
Such a layout is only to achieve specific specifications, and has no effect on performance release.
The RTX 4080 shielded 2 groups of SMs in each of the 2 groups of GPCs, and opened a total of 76 groups of SMs and 9728 CUDA cores.
In addition, it also has 304 fourth-generation Tensor tensor cores, 76 third-generation RT ray tracing cores, 304 texture units, and 112 ROP units.
The L2 cache retains a full 64MB, an increase of almost 10 times compared to RTX 3080 Ti 6MBand the large-capacity L2 cache can effectively increase the internal transmission bandwidth and directly improve game performance.
The 256Bit video memory is not very generous, but fortunately, the video memory frequency of GDDR6X is high enough, equivalent to 22.4GHz, so the bandwidth of 716.8GB/s has been achieved, which will not be a bottleneck.
It is also worth mentioning that,AD103 originally designed 6 groups of NVENC video codecs, but only half of 3 groups were enabled on the RTX 4080The castration is a bit severe, and it will have a certain impact on the video codec performance, especially in the face of the latest AV1.
If you want to use it for video productivity, you must weigh it.
2. RTX 4080 Power Consumption Discussion
Regarding the power consumption of graphics cards, it has always been the focus of attention and controversy, especially now that the power consumption of high-end graphics cards is increasing day by day, which makes many players restless.
But in fact, the issue of power consumption is very complicated. The specification labeling and application scenarios are complex and diverse. It is difficult to sum it up in one word, and it has caused many misunderstandings.
The power consumption of RTX 4090 is nominally 450W, coupled with the use of a new 12VHPWR 16-pin power supply interface with a peak power supply capacity of 600W, this scares many people.
During the evaluation of RTX 4090, we Kuai Technology was the only one in many media to conduct a detailed test on the actual game power consumption under three resolutions. The results found that RTX 4090 is far from being such an electric tiger:
After a variety of game tests, the actual running power consumption of RTX 4090 in most 3A games at 1080P resolution is only about 200~250W, and the power consumption at 2K resolution is only about 310W, and it is difficult to exceed 330W.
Even at the stressful 4K resolution, the RTX 4090 runs at under 380W and never exceeds 400W.
The power consumption of RTX 4090 reaches about 440W only when the FurMark extreme toaster is used, but this figure does not have any practical significance. No one will always load the toaster 100%, right?
In fact, the power consumption marked by the RTX 40 series is called “TGP” (Total Graphics Power), strictly speaking, it refers to the “power consumption wall”, which is an upper limit of GPU Boost acceleration frequency operation power consumption, which is combined with heat dissipation restrictions To limit the operating frequency.
When the GPU is running with a moderate or light load, or is limited by the CPU performance bottleneck, the GPU Boost frequency can still reach the highest value, and the efficiency of the GPU is also maximized at this time.
The same is true for RTX 4080, with a nominal TDP of 320W, which is actually far from reaching it. The average game power consumption officially given by NVIDIA is only about 250W, leaving a full 30% of space.
In this test, we will also actually investigate the game power consumption of the RTX 4080.
3. DLSS 3 game progress
DLSS 3 is the finishing touch of the Ada Lovelace architecture. Its core is a revolutionary frame generation technology. Simply put, it is a combination of software and hardware, intelligently generating and inserting a frame between two game frames, plus super-resolution scaling With technology, 7/8 of the entire game screen is non-rendered, and the performance improvement is naturally several times.
Since its birth, DLSS 3 has quickly been supported by more than 35 games and applications, and it is rapidly landing. As of today, there are 10 games that can be played:
A Plague Tale: Requiem
Bright Memory: Infinite
Destroy All Humans! 2 – Reprobed
FIST: Forged in Shadow Torch
“The Cold Against the Water” (Justice)
Marvel’s Spider-Man Remastered
Microsoft Flight Simulator
in addition,Tomorrow’s “WRC Generations”, “Need for Speed: Uninhibited” on the 29th, and “Warhammer 40K: Dark Tide” on the 30th will also support DLSS 3, which means that there will be 13 models within this month.
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