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NVIDIA Increases Caches for Ada Lovelace, to Catch Up with AMD

btarunr

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The next-generation "Ada Lovelace" graphics architecture powering NVIDIA's GeForce RTX 40-series graphics cards, could see a significant increase in on-die cache memory, according to leaked source-code related to drivers or firmware, seen by XinoAssassin on Twitter. The source-code leak emanates from the recent large-scale cyber-attack on NVIDIA. When comparing source files related to Ampere and Ada architectures, XinoAssassin noticed lines that reference large cache slices.

From this, it was analyzed that the top-of-the-line AD102 silicon will have 96 MB of last-level cache on the silicon; the AD103 and AD104 chips have 64 MB; the AD106 has 48 MB, and the smallest AD107 has 32 MB. Compare this to the 6 MB on the GA102, puny 4 MB on the GA103 and GA104; 3 MB on the GA106, and 2 MB on the GA107. NVIDIA is known to make innovations in generational memory bandwidth increase and memory management, with each new architecture. The company could tap into even faster versions of GDDR6X memory it co-developed with Micron (GDDR6 with PAM4 signaling).



AMD credits its engineering choices with Infinity Cache (large on-die caches on RDNA2 GPUs) to play a key role in lubricating the memory sub-system. Since this is much cheaper than going for wider memory buses or using exotic HBM solutions; and since AMD gathered knowhow on 3D-stacked cache memory with its "Zen 3" CCDs that have 3D Vertical Caches; we expect the company to double down on Infinity Cache with RDNA3.

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I wonder if this will help with their stuttering problem.
 
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I wonder if this will help with their stuttering problem.
I don't think so, although i am not aware of a Stuterring problem specific to Nvidia.

That will mostly help reducing the need for large memory bus/high frequency memory and it will reduce the efficiency loss of high core frequency. Since each clock last shorter the higher the frequency, having to wait for the memory is increasingly costly. Cache help to reduce that by having the possibility to return the data way faster. Limiting the number of wasted clock cycle.
 
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Benchmark Scores Its fast. Enough.

Looking at frametimes AMD clearly has a large advantage, the real question is do you notice it, some people seem to be more sensitive to it.
 
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Looking at frametimes AMD clearly has a large advantage, the real question is do you notice it, some people seem to be more sensitive to it.

It's kind of back and forth with AMD having a roughly 10% better IQR on average. The only game where the 3090 performs significantly better than the 6900 XT is RDR2.

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Bandwidth will be crazy 4090 is doing 8k 120 native with ray tracing no dlss lol
 
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Bandwidth will be crazy 4090 is doing 8k 120 native with ray tracing no dlss lol
Yes, but at the cost of 600 to 800+ watts power requirement based on rumors? In other words, besides having to shell out north of 2K easily (looking at current GPU pricing), you will need to get a top of the line 1.3 to 1.5 KW PSU since these new GPUs will need a different power connector/ standard to provide it with enough juice.
 
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