Originally Posted by hifiaudio2
EDIT : One more question... are any of these CPU / integrated graphics solutions powerful enough to output true 4k video? I briefly got 4k working by lugging my main pc into the home theater and hooking up to my projector, but that pc is a Core i7 overclocked to 4.8 GHZ with a Radeon 7950. I have never looked at how and if HD 4000 graphics or the like can do 4k. Thats not extremely important but since this PC would be in my home theater, it would be nice to have.
LIke 3D (MVC decode, then HDMI 1.4a 3D output), playing back 4K UHD consists of two stages: 4K decode, then 4K UHD output. Here are two remarks:
- AVC (Advanced Video Coding), the current best coding, is mainly used in 4K videos right now and some GPU supports 4K AVC decode. However, when the next HEVC (HIgh Efficiency Video Coding) is released and become popular, you may want to upgrade GPU to one that supports 4K HEVC decode.
- HDMI 1.4a supports 4K UHD up to 30 fps. So you will have to wait for the next HDMI if you want 4K 60 fps. DisplayPort 1.2 already supports 4K 60 fps, but it won't be used in consumer electronics products.
That being said, here is a quick summary of the current state:
- 4K 24fps AVC decode: Almost every current desktop dual core processor, NVIDIA VP5 (implemented in GeForce 520/610, 640 and higher), Intel HD Graphics 2500/4000
- 4K 60fps AVC decode: Core i5 and higher, AMD FX-8xxx, Intel HD Graphics 2500/4000
- 4K 24fps HDMI output: Radeon HD 7750 and higher, GeForce GT 640 and higher
- 4K 60fps DP output: Radeon HD 7750 and higher, Intel HD Graphics 2500/4000 (via two DP cables)
So your system supports 4K 24fps over HDMI and 4K 60fps over DP without stuttering (i7 is powerful enough; if i7 is IVB, then you can even use QuickSync decoder with HD 7950).
In future, there will be cheap graphics cards that support 4Kp60 AVC decode as well as HEVC decode and support 4K output over the next HDMI. (CPU won't matter.)