Wednesday, October 21st 2020
AMD Radeon RX 6000 Series Specs Leak: RX 6900 XT, RX 6800 XT, RX 6700 Series
AMD's Radeon RX 6000 series graphics cards, based on the RDNA2 graphics architecture, will see the introduction of the company's first DirectX 12 Ultimate graphics cards (featuring features such as real-time raytracing). A VideoCardz report sheds light on the specifications. The 7 nm "Navi 21" and "Navi 22" chips will power the top-end of the lineup. The flagship part is the Radeon RX 6900 XT, followed by the RX 6800 XT and RX 6800; which are all based on the "Navi 21." These are followed by the RX 6700 XT and RX 6700, which are based on the "Navi 22" silicon.
The "Navi 21" silicon physically features 80 RDNA2 compute units, working out to 5,120 stream processors. The RX 6900 XT maxes the chip out, enabling all 80 CUs, and is internally referred to as the "Navi 21 XTX." Besides these, the RX 6900 XT features 16 GB of GDDR6 memory across a 256-bit wide memory interface, and engine clocks boosting beyond 2.30 GHz. The next SKU in AMD's product stack is the RX 6800 XT (Navi 21 XT), featuring 72 out of 80 CUs, working out to 4,608 stream processors, the same 16 GB 256-bit GDDR6 memory configuration as the flagship, while its engine clocks go up to 2.25 GHz.
A notch below the RX 6800 XT is the RX 6800 (Navi 21 XL), which cuts down the "Navi 21" further, giving it 64 compute units or 4,096 stream processors; the very same 16 GB of 256-bit GDDR6 memory interface, and up to 2.15 GHz engine clocks. The RX 6900 XT, along with the RX 6800 series, will be announced in the October 28 presser.
The next chip AMD is designing is the 7 nm "Navi 22" silicon, which features 40 compute units. On paper, this count looks similar to that of the "Navi 10," and it remains to be seen if this is a re-badge or a new silicon based on RDNA2. The RX 6700 XT maxes this chip out, featuring 40 CUs or 2,560 stream processors; while the RX 6700 features fewer CUs (possibly 36). The interesting thing about these two is their memory configuration—12 GB of 192-bit GDDR6.
Source:
VideoCardz
The "Navi 21" silicon physically features 80 RDNA2 compute units, working out to 5,120 stream processors. The RX 6900 XT maxes the chip out, enabling all 80 CUs, and is internally referred to as the "Navi 21 XTX." Besides these, the RX 6900 XT features 16 GB of GDDR6 memory across a 256-bit wide memory interface, and engine clocks boosting beyond 2.30 GHz. The next SKU in AMD's product stack is the RX 6800 XT (Navi 21 XT), featuring 72 out of 80 CUs, working out to 4,608 stream processors, the same 16 GB 256-bit GDDR6 memory configuration as the flagship, while its engine clocks go up to 2.25 GHz.
The next chip AMD is designing is the 7 nm "Navi 22" silicon, which features 40 compute units. On paper, this count looks similar to that of the "Navi 10," and it remains to be seen if this is a re-badge or a new silicon based on RDNA2. The RX 6700 XT maxes this chip out, featuring 40 CUs or 2,560 stream processors; while the RX 6700 features fewer CUs (possibly 36). The interesting thing about these two is their memory configuration—12 GB of 192-bit GDDR6.
191 Comments on AMD Radeon RX 6000 Series Specs Leak: RX 6900 XT, RX 6800 XT, RX 6700 Series
RX 6900 XT's core count is 2 times of RX 5700 XT so i show GTX 1060 VS GTX 1080 (performance gap is same with between RX 6900 XT and RX 5700 XT but RDNA2 will probably give 1.2 performance boost over RDNA1.
100/57 = 1.754, 1.66*1.2*0.91(Bandwidth) = 1.81 I think 6900 XT is faster than RTX 3080 and 6900XT's performance is between RTX 3090 and RTX 3080.
My prediction about prices and performances
RX 6900 XT $799 faster than RTX 3080 but weaker than RTX 3090
RX 6800 XT $629 faster than RTX 3070 and almost same with RTX 3080's performance
RX 6800 $479 faster than RTX 2080 Ti by %5-10
RX 6700 XT $379 same performance with RTX 3060 Ti but it has 12GB VRAM
RX 6700 $329 same performance with RTX 3060/2080
RX 6600 XT $229 faster than RTX 2060/S/3050 Ti
RX 6500 XT $179 same performance with RTX 3050 Ti/GTX 1660 Ti
RX 6500 $129 same performance with RTX 3050/GTX 1660
All of GPUs are capable of Ray Tracing and even RX 6500 and RTX 3050 give RTX 2060's Ray Tracing performance. All in all, it is my prediction.
One more week to go, fingers crossed.
I'll settle for products you can actually buy - and not some semi-vapourware, crash-to-desktop, bug-ridden Nvidia cards.
RX 6800 XT = 20.74 TFLOPS (54% more than 2080TI)
RX 6800 = 17.61 TFLOPS (31% more than 2080TI)
RX 6700XT (if clocked at 2.15GHz) = 11 TFLOPS (18% less than 2080TI/ on pair with 2080S )
Not bad at all... RDNA2 should give Ampere good run for it's money IF AMD chooses to be aggressive on pricing.
As for availability, I don't care for cards that expensive, so it's all the same to me.
NB If it's a cache for VRAM, having to stay within the cache's size would defeat the purpose of more VRAM. But this may be some other type of cache (if it exists at all, I think AMD never confirmed its existence).
Its like comparing sequential write speeds with real world ssd performance.
I think you're waiting for magic, so you'll be disappointed.
Full-die 80CU 6900XT for $700
Lightly cut-down die 72CU 6800XT for 600$
Heavily cut-down die 64CU 6800 for 500$
That would be great if 6900XT is above the performance of RTX3080 10GB. If it is on par or slightly behind deduct $50 from those prices. And remember that the 6800 will be almost surely faster on average than 3070 8GB.
As for the RX6700 series my guess is they will be at least 20-25% faster than RX5700 series and will cost less. So, 2080S level of performace for $250-350 (XT and not-XT into that range) would be great for us consumers me thinks.
My 5c.
Also, cache memory is so fast in part because it's very power hungry.