Over the weekend we reported on a statement released by NVIDIA regarding recent concern over unusual VRAM allocation and VRAM bandwidth performance from the GeForce GTX 970. In brief, various GTX 970 owners had observed that the GTX 970 was prone to topping out its reported VRAM allocation at 3.5GB rather than 4GB, and that meanwhile the GTX 980 was reaching 4GB allocated in similar circumstances. All of this was at odds with what we thought we knew about the cards and the underlying GM204 GPU, as the two cards were believed to have identical memory subsystems.
Yes, that last 0.5GB of memory on your GeForce GTX 970 does run slower than the first 3.5GB. More interesting than that fact is the reason why it does, and why the result is better than you might have otherwise expected. Last night we got a chance to talk with NVIDIA’s Senior VP of GPU Engineering, Jonah Alben on this specific concern and got a detailed explanation to why gamers are seeing what they are seeing along with new disclosures on the architecture of the GM204 version of Maxwell.


When the GTX 980 and GTX 970 were released, NVIDIA provided the above original specifications for the two cards. The launch GTX 900 GPUs would be a standard full/die-harvested card pair, with the GTX 980 using a fully enabled GM204 GPU, while the GTX 970 would be using a die-harvested GPU where one or more SMMs had failed. As a result of this the big differences between the GTX 980 and GTX 970 would be a minor clockspeed difference, the disabling of 3 (of 8) SMMs, and a resulting reduction in power consumption. Most important for the conversation at hand, we were told that both possessed identical memory subsystems: 4GB of 7GHz GDDR5 on a 256-bit bus, split amongst 4 ROP/memory controller partitions. All 4 partitions would be fully active on the GTX 970, with 2MB of L2 cache and 64 ROPs available.




Tremendos garcas. O sea, no saben que tienen ni sus propios productos?
Algo tienen que hacer, regalar un juego, reembolsos, nuevas tarjetas, si lo dejan en la nada se les va a venir con todo


Sources:
http://linustechtips.com/main/topic/...d-recall-970s/
http://www.pcper.com/reviews/Graphic...ations-GTX-970
http://anandtech.com/show/8935/gefor...ory-allocation