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Unreal Engine 3 Adding DirectX 11 Support

NVIDIA and Epic Games announce the addition of DirectX 11 support to Unreal Engine 3, and that they are showcasing the updated graphical capabilities of the engine at the GDC (thanks Big Download). Here's word:

The new Unreal Engine 3 real-time demo, being shown during GDC exclusively in Epic's booth (Business Suite #400, South Hall), was developed using NVIDIA's GeForceŽ GTX 500 Series GPUs. It represents Epic's proposal for what the next generation of gaming will look like and sets a new bar for what can be accomplished with Epic's Unreal Engine 3 technology. It also showcases the myriad benefits that DX11 brings to gaming, including complex environments and detailed character models with lifelike movement and animations. The demo is further enhanced by the Epic's collaboration with NVIDIA and use of NVIDIA's PhysX and APEX technologies, including destruction and clothing modules, which enable realistic character interactions with the environment.

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25. Re: Unreal Engine 3 Adding DirectX 11 Support Mar 2, 2011, 18:12 Hanneth
 
You hit the hammer on the nail "at least on a PC". The Xbox360 uses a unified memory design. This means that the CPU, GPU and sound are all accessing the same memory causing a major memory bottleneck.

Most PCs have dedicated memory for each of these things.

Also adding more memory slows down the memory access time. On some old motherboards you would see this where if you had 1 or 2 slots filled you could run at 133mhz, where if you filled all 3 slots you could only run at 100mhz.

Everything is about trade offs. For example, if you have a 64-bit AMD, or Intel computer, it probably isn't actually a 64-bit computer unless you have an Itanium.

It is most likely a 32-bit/64-bit/80-bit/128-bit hybrid. 32-bit instruction set, 64-bit integer and memory addressing, 80-bit floating point and 128-bit SIMD instructions. Even then the actual memory controller is probability 42-bit or 48-bit. The more bits, the slower it takes to run, unless you need that precision, then it is faster, thus why the hybrid architecture.

I guess that kinda makes sense. That said, memory speed doesn't really seem to make any significant performance difference, at least on the PC. In real-world gaming benchmarks, using DDR2 memory will result in the same loading times and framerates as using DDR3 memory. In this case, quantity is more important than quality.
 
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