Wednesday, September 21st 2022
ICYMI, NVIDIA GeForce RTX 4080 12GB Uses 192-bit Memory Bus
Amid the fog of rapid announcements and AIC graphics card launches, this little, interesting detail might have missed you, but the new GeForce RTX 4080 12 GB graphics card announced yesterday; features a memory bus-width of just 192-bit, which is half that of the RTX 3080 12 GB (384-bit). The card uses 21 Gbps GDDR6X memory, which at 192-bit bus-width, works out to just 504 GB/s bandwidth. In comparison, the RTX 3080 12 GB uses 19 Gbps GDDR6X memory, which at 384-bit bus width, produces 912 GB/s. In fact, even the original RTX 3080 with 10 GB of GDDR6X memory across a 320-bit bus, has 760 GB/s on tap.
The bigger RTX 4080 16 GB variant uses 256-bit memory bus, but faster 23 Gbps GDDR6X memory, producing 736 GB/s of memory bandwidth, which again, is less than that of the original 10 GB RTX 3080. It's only the RTX 4090 that has an unchanged amount of memory bandwidth over the previous generation—1008 GB/s, which is identical to that of the RTX 3090 Ti, and a tad higher than the 936 GB/s of the RTX 3090 (non-Ti). Of course, memory bandwidth is no way to compare the RTX 40-series from its predecessors, there are a dozen other factors that weigh into performance, and what matters is you're getting generationally more memory amounts with the RTX 4080-series. The RTX 4080 12 GB offers 20% more memory than the RTX 3080, and the RTX 4080 16 GB offers 33% more than the RTX 3080 12 GB. NVIDIA tends to deliver significant performance gains with each new generation, and we expect this to hold up.
The bigger RTX 4080 16 GB variant uses 256-bit memory bus, but faster 23 Gbps GDDR6X memory, producing 736 GB/s of memory bandwidth, which again, is less than that of the original 10 GB RTX 3080. It's only the RTX 4090 that has an unchanged amount of memory bandwidth over the previous generation—1008 GB/s, which is identical to that of the RTX 3090 Ti, and a tad higher than the 936 GB/s of the RTX 3090 (non-Ti). Of course, memory bandwidth is no way to compare the RTX 40-series from its predecessors, there are a dozen other factors that weigh into performance, and what matters is you're getting generationally more memory amounts with the RTX 4080-series. The RTX 4080 12 GB offers 20% more memory than the RTX 3080, and the RTX 4080 16 GB offers 33% more than the RTX 3080 12 GB. NVIDIA tends to deliver significant performance gains with each new generation, and we expect this to hold up.
81 Comments on ICYMI, NVIDIA GeForce RTX 4080 12GB Uses 192-bit Memory Bus
The price is very stiff, already, for a world in recession. Let's hope performance makes up for it, at least partly.
196bits192bits is fine, although that put that 4080 in the league of the RX 7700 XT if that one keep the RX 6700 XT memory/bus patternwell at least
196bits192bits does not hinder the RX 6700 XT :oops:edit: the 4080 12gb is technically the 4070 o_O i wonder how the 4070 will look .... because if it has better specs on memory and close to the 4080 12gb in cuda ... the 4080 12gb is DOA basially
2 bit eyesight today ahah..ahahah :oops:
Waiting for 3dfx like dramatic deflation of nvidia and shameful slip into oblivion. :D
RTX 20XX series - 5-10% performance increase to GTX 10XX. RT on the first RTX series cards is useless in 4K(2K). RT on RTX 30XX series cards without DLSS, not practically usable for playing.
The prices of graphics cards didn't rise, they were detached from the hardware market. These are prices from the cryptocurrency market, completely detached from reality.
In addition, the performance without artificial enhancers was tragic - the RTX 3090Ti offered 30-60 FPS in 4K with RT for $ 2,000 :banghead: Now probably the new RTX with the new DLSS will not be compatible with the two previous RTX series.
1st- then it could be exactly the same with each series, you either buy a new series or lose support and playability. Like loss of support when releasing a new Android or iOS version.
2nd- the prices are so high that you can buy an OLED TV, console, and the most expensive card still costs more, just GPU. The prices of PC components from the basic home appliance, entertainment have become insane, like some premium goods.
AMD might just win this next gen if they can get their act together. 7000 series had been their best era in the past.
The 4080 12gb is £950 (USD to gbp current exchange plus 20% vat)
The equivalent previous gen card, the 3060 ti, cost just £350 on the same basis, at launch
This is almost three times the price.
I hope some of the people ranting about the 6500 xt will give this turd the proper slating it deserves
It was expected of course based on the final specs.
So $900 for a 12GB 192bit bus < 300mm² chip!
The leakers are saying only Navi31 this year and the max cut-down Navi31 shouldn't be less than 160RBs/8960SP/320 bit bus/20GB in worst case scenario and at least 4080 16GB raster performance (and logically a lot more depending frequency and how far cut-down is it)
So Nvidia will start this year at $899, I wonder what SRP AMD will give for cut-down Navi31 if it has only Navi31 for this year!
Btw doesn't 1200 euros mean 1450-1500 with taxes?
It's a bad play IMHO.
I expect the 4070 to be 192-bits (but only GDDR6 at 18Gbps to save cost and power), GTX 4060 Ti and maybe 4060 at 160-bits, 4050 at 128-bits!
we just went through a 2-year transition to move on to 2GB density chips, so not expecting anything less than 128-bits in all these cards! its going to be half a decade before we see the 8GB on 64-bit bus video cards!
It's to be expected with what Jensen was saying in regards to the stock price and profits at the shareholder meeting; market manipulation to inflate profits. Nvidia is doing this through misbranding their products to justify a higher price than what the customers would normally bear for a similar tier product.
I won't be surprised if more AIBs start dumping Nvidia partnerships after this generation as Nvidia is going to do whatever they can to take up more market share with the FE cards.
Where's the price to performance ratio improvement from generation to generation we used to get? :banghead:
NVIDIA doesn't want to sell RTX 40 series cards.
Don't get me wrong, if you still wanna buy a 40 series, they'll be more than happy to sell one to you. But given what I can only assume are still poor inventory levels (supply chains, yields, etc.), that press conference wasn't meant to sell 40 series cards. NVIDIA has two objectives with this launch.
1. Set the goalposts out of reach for RX 7000 by leaning heavily on DLSS 3.0 to promote performance uplifts when they know FSR isn't keeping up.
2. Price the cards out of reach to steer consumers toward the glut of 30 series inventory.
Accomplishing 1 will make sure they have the undisputed Halo product, which sells more lower end cards by association. AMD was much closer than I bet NVIDIA anticipated they would be in terms of pure rasterization last generation. It makes sense for them to leverage their proprietary portfolio to the fullest where AMD is not comparable.
As for 2, once the 30 series are depleted they will have a lot of wiggle room to lower the prices of the vanilla 40 series. Just in time for a Super refresh.