NVIDIA seems to have taken notice of AMD’s ambitious plans with its next-gen RDNA 3 graphics architecture, and devised plans of tackling it as well. Team Red is planning to adopt a chiplet design with up to seven dies for the Radeon RX 7900 XT (Navi 31), allowing for a remarkable 2-2.5x increase in raw graphics performance. As reported a short while back, AMD has significantly changed the WGP and the number of active threads per WGP with RDNA 3.
I must clarify that the current AD102 is NOT the original AD102. Ada Lovelace is no longer a simple Ampere refresh, although it was like this in the beginning. (zorafestival.org)
NVIDIA, on the other hand, had a simple and straightforward plan: Take Ampere, port it to TSMC’s 5nm process, and cram as many transistors as possible onto an 800+mm^2 die. That design seems to have been scrapped and replaced with a much more potent one. According to Kopite7kimi, the foremost source on NVIDIA’s future GPU, the AD102 core has been updated and can no longer be compared to the original die.
GPU
GA102
AD102
RTX 4090
AD103
RTX 4080
RTX 4070 Ti (AD104)
RTX 4070
Arch
Ampere
Ada Lovelace
Ada Lovelace
Ada Lovelace
Process
Sam 8nm LPP
TSMC 5nm
TSMC 5nm
TSMC 5nm
GPC
7
12
11
7
7
5
5
TPC
42
72
64
42
40
30
30
SMs
84
144
128
84
80
60
60
Shaders
10,752
18,432
16,384
10,752
9,728
7,680
7,680
TP
37.6
~100 TFLOPs?
83 TFLOPs
~50 TFLOPs
47 TFLOPs?
~35 TFLOPs
35 TFLOPs?
Memory
24GB GDDR6X
48GB GDDR6X
24GB GDDR6X
16GB GDDR6X
12GB GDDR6X
L2 Cache
6MB
96MB
72MB
64MB
48MB
Bus Width
384-bit
384-bit
256-bit
192-bit
TGP
350W
600W
450W
450W
285-340W
300W
285W
Launch
Sep 2020
Sept 22?
Sept 22?
Q1 2023?
It’s unclear what part of the Lovelace architecture has been updated, but you can now expect the RTX 4090 and the Radeon RX 7900 XT to offer roughly the same level of performance. Recent rumors predict an incredible performance target of 100 TFLOPs for the two flagships. This will be achieved using a combination of increased core and boost clocks with unreasonably high TGPs to boot.
Previous coverage:
NVIDIA’s GeForce RTX 4090 is going to come with 24GB of 24Gbps GDDR6X memory paired with the AD102-300 die and a TGP of 600W. This scoop was shared by @kopite7kimi, one of the most reliable sources on NVIDIA’s GPUs. According to Kimi, the RTX 4080 and 4090 will be based on the AD102 die and 24Gbps GDDR6X memory with the latter featuring a cutdown bus and a few SMs disabled.
The GeForce RTX 4080 is expected to feature 20GB of GDDR6X memory across a 320-bit bus. This GPU will feature around 14,000 FP32 cores, a notable cut from the 15-16K shaders on the RTX 4090. The latter will be paired with a 384-bit bus instead. As for the RTX 4070, we’re looking at 12GB of GDDR6X memory across a 256-bit bus. It will be based on the AD104-400 die and pack up to 10,000 FP32 cores. Finally, the RTX 4070 and 4080 will have a TGP of 400W and 500W, respectively.
Processors, PC gaming, and the past. I have written about computer hardware for over seven years with over 5000 published articles. I started during engineering college and haven't stopped since. On the side, I play RPGs like Baldur's Gate, Dragon Age, Mass Effect, Divinity, and Fallout. Contact: areejs12@hardwaretimes.com.
