Nvidia RTX 3090, RTX 3080 and RTX Titan specifications leaked – GDDR6X?

Nvidia RTX 3090, RTX 3080 and RTX Titan specifications leaked - GDDR6X?

Nvidia RTX 3090, RTX 3080 and RTX Titan specifications leaked – GDDR6X?

Specifications for Nvidia’s planned Ampere series of graphics cards have started appearing online, many of which detail a new memory type called GDDR6X, and a graphics card called the RTX 3090. 

At this time, we cannot confirm the validity of these specifications. Details of the Ampere series remain unknown to most Nvidia employees, making the best response from practically all Nvidia representatives be the industry standard “we don’t comment on rumours”. Take these specifications with a grain of salt, as while they have been independently reported by two sources, @KkatCorgi and @kolite7kimi (as detailed by Videocardz), it is possible that these specifications originated from a single, possibly false, source. 

Why is there no RTX 3080 Ti? 

Rumour has it that Nvidia plans to kill off its XX80 Ti branding. Simply put, the RTX Super series set a confusing precedent for consumers. Is the RTX 2080 Super faster, or is the RTX 2080 Ti faster? While hardware enthusiasts will know the difference, most consumers will not, and this has caused Nvidia to rethink its Ti branding. 

With multi-GPU being an almost dead technology, Nvidia has room to re-adopt their X90 series brand name to replace their confusing Ti branding. This streamlines Nvidia’s marketing and allows future “Super” edition cards to be released without as much consumer confusion. 

GDDR6X

At this time, no memory manufacturer has revealed GDDR6 series memory modules. That said, GDDR6X could simply be a brand name for faster GDDR6 memory modules, similar to HBM2E. The fastest GDDR6 memory chips inside today’s consumer graphics cards are rated at 16Gbps, though Samsung claims to have 18Gbps modules available.    

Faster graphics cards will require more memory bandwidth, and there are two ways to achieve this. GPU makers can either go wide or go tall. Going wide requires more memory chips over a larger memory bus and going tall requires faster memory chips over a smaller memory bus. With GDDR6X, Nvidia is going tall by using a small memory bus with faster GDDR6X memory chips. 

Right now, we do not know if GDDR6X even exists, and this fact casts a huge shadow over these rumoured specifications. That said, who heard about GDDR5X before Nvidia revealed its GTX 10 series of graphics cards? 

RTX 3080

Looking at the chart below, we can see that Nvidia’s rumoured RTX 3080 offers gamers the same number of CUDA cores as Nvidia’s RTX 2080 Ti and delivers gamers significantly more memory bandwidth.

With Nvidia’s RTX 2080 Ti being both bandwidth and power-constrained in many of today’s games, it is easy to see how Ampere has the potential to deliver significant performance improvements over Turing. 7nm manufacturing and architectural enhancements will increase Ampere’s efficiency, performance per clock cycle, and raw clock speeds over Nvidia’s Turing-based RTX 2080 Ti. These factors should make Ampere a lot more powerful than Turing, at least on the high-end.   

 
 
  RTX Titan (Ampere) RTX 3090
/3080 Ti
RTX 3080 Titan RTX (Turing) RTX 2080 Ti RTX 2080 Super RTX 2080
GPU GA102-400 GA102-300 GA102-200 TU102-400 TU102-300 TU104-450 TU104-400
CUDA Cores 5376 5248 4352 4652 4352 3072 2944
Memory 24GB GDDR6X 12GB GDDR6X 10GB GDDR6X 24GB GDDR6 11GB GDDR6 8GB GDDR6 8GB GDDR6
Memory Speed 17Gbps 21Gbps 19Gbps 14Gbps 16Gbps 15.5 Gbps 14 Gbps
Memory Bus 384-bit 384-bit 320-bit 384-bit 352-bit 256-bit 256-bit
Memory Bandwidth 816GB/s 1008GB/s 760 GB/s 672 GB/s 616 GB/s 496 GB/s 448GB/s

 

Nvidia RTX 3090, RTX 3080 and RTX Titan specifications leaked - GDDR6X?  

At this time, Nvidia has said nothing about their consumer-grade RTX Ampere series of graphics cards, so take these specifications with a massive grain of salt. That said, these specifications lie well within expectations for the RTX 30XX series, assuming that GDDR6X memory exists. 

You can join the discussion on Nvidia’s RTX 3090, RTX 3080 and RTX Titan Ampere graphics cards on the OC3D Forums.