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[Guru3D] Wireless Graphics card - KFA2 GTX 460 WDHI review - Page 3

post #21 of 33
For those who is wondering why 5 antennas:

Each antenna is 54Mbps, 54Mbps x 5 = 270Mbps = 33.75MBps = 35389440 bytes

If you consider 32-bit color, each pixel uses 32-bits = 4bytes

35389440 bytes / 4 bytes per pixel = 8,847,360 pixels

consider a max resolution of 2560 x 1600 per monitor = 4,096,000 pixels
most video cards drives 2 displays so that 4,096,000 pixels x 2 = 8,192,000

8,192,000 < 8,847,360, which leaves (655360 x 4) bytes = 2.5Mbytes
which is enough room to pass other display regulatory data, such as error correction

this lack of bandwidth can also explain why DD PLUS and True HD is not supported because they take a 3-18Mbits, which doesn't fit on the bandwidth. (DTS or DD is only around 80KBps which fits, LPCM 8 channel is 768KBps which also fits, and leaves room for alot of other stuff)

they could cram another antenna on there but it is not really cost effective.
Edited by Captain Han - 2/16/11 at 8:48pm
post #22 of 33
This is amazing and a must for all HTPC.
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post #23 of 33
That is a seriously neat video card but will it be successful commercially? I mean yeah great for HTPC's but what else? It's such a niche market.
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post #24 of 33
looks kind of cool..
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post #25 of 33
don't really see the point of this, because windows 7 has similar features built in. it's even a focal point of the windows 7 ads.
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post #26 of 33
Quote:
Originally Posted by Captain Han View Post
For those who is wondering why 5 antennas:

Each antenna is 54Mbps, 54Mbps x 5 = 270Mbps = 33.75MBps = 35389440 bytes

If you consider 32-bit color, each pixel uses 32-bits = 4bytes

35389440 bytes / 4 bytes per pixel = 8,847,360 pixels

consider a max resolution of 2560 x 1600 per monitor = 4,096,000 pixels
most video cards drives 2 displays so that 4,096,000 pixels x 2 = 8,192,000

8,192,000 < 8,847,360, which leaves 655360 bytes = 640Kbytes
which is enough room to pass other display regulatory data, such as error correction

this lack of bandwidth can also explain why DD PLUS and True HD is not supported because they take a 3-18Mbits, which doesn't fit on the bandwidth. (DTS or DD is only around 80KBps which fits, and leaves room for alot of other stuff)

Another possiblity is to use a 30-bit color scheme, which has the same color depth as 32-bit except its unpadded, which takes 30MBps instead of 33.75MBps. This implementation makes more sense as it allows passing of 8 channel LPCM, which is 768KBbs.
Even so, wouldnt it still struggle to maintain a HD stream? The new 3 antenna with 3 streams each routers + proper adapters/wifi cards still cant keep a HD stream going without hiccups, unless it buffers, which is unacceptable. I didnt have time to read the review but I watched the quick video and it looked like it was working flawlessly. I just dont get how the top networking companies can be surpassed by someone I've never heard of 'amimon'.
post #27 of 33
Quote:
Originally Posted by windfire View Post
In the final page (Conclusion):


Thanks!
    
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post #28 of 33
well network companies focus on networks, not wireless video displays

just think, 1080p is only 8100KBytes/s ~8Mbytes, 1080i is half of that, 720p is even less, so a regular wifi could handle 1080i and 720p no problem.

you need to also remember that is uncompressed display rendered in realtime, streaming 1080p videos dont count because it goes through compression and uses significantly less bandwidth. This is how services like OnLive are doing them, and the fact that they only support 720p and while only using needs a 5mbit connection, but the quality is significantly reduce, not to mention the lag.

this card aint gonna be mainstream adoption anytime soon, i mean who wants 5 antennas sticking out of their monitor
post #29 of 33
If you live in a studio appartment, probably not. HTPC in a house with many rooms, YES! I want one, at a lower price.
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post #30 of 33
Quote:
On the backside of the card we see a clean blue PCB, slightly larger than normal, roughly 11 inches / 27 CM.
That's more than "slightly" larger, it's nearly 3" longer -_- I do not care for long cards, personally
    
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