Benchmark Results: CPU Utilization
Objective testing turns out to be a lot more difficult than we might have first hoped. The problem is that none of the software involved is designed to allow hardware acceleration to be disabled. Turning off GeForce hardware acceleration in PowerDVD has no effect, and the program appears to continue to lean on Nvidia's VP4 engine for MVC decoding.
We can extract some useful data from these test systems anyway, because the GeForce GT 240 card in the HTPC is essentially identical to the GeForce GT 240 in the test system we put together. This gives us a great opportunity to test the CPU utilization on different CPUs when using similar graphics hardware:
A you can see, the dual-core Pentium G6950 demonstrates an average CPU utilization of just under 20% during Blu-ray 3D playback when a GeForce GT 240 is handling decode acceleration. On our Core i7-920, CPU utilization appears to be about half of that, or just under 10%.
Now, we might not be able to turn off hardware acceleration, but we can try things out with a card that doesn't support Blu-ray 3D's MVC codec. Here's how the GeForce GT 240 (a card with Blu-ray 3D-decode acceleration) compares with a GeForce GTX 260 (a card without Blu-ray 3D decode acceleration) on our Core i7-equipped test machine:
There is certainly a dramatic increase in CPU utilization here, from just under 10% with the GT 240 to about two and a half times that with the GeForce GTX 260.
With the Core i7 CPU under 30% of load, we can tell more CPU power is required, but the i7 is far from its limits. The question remains: how much CPU do you need for a graphics card that doesn't support MVC decoding?
We put together an Athlon II system for testing. The system allowed us to put quad and triple-core Athlon II CPU software decoding to the test. However, we couldn't get a dual-core CPU to play back Blu-ray 3D on our test system. Here are the results:
As you can see, the triple-core Athlon II X3 440 at 3 GHz is highly stressed during Blu-ray 3D playback. It's difficult to make precise conclusions without per-core utilization data but CyberLink's software decoder appears to take advantage of threading, a feature that quad-core owners will appreciate. Judging from the performance we've seen, we think Blu-ray 3D can be comfortably played back with a triple-core CPU at 3 GHz or a quad-core CPU at 2.5 GHz using PowerDVD's software decoder.
So far i have had a Very positive experience with Nvidia's solution!
I do agree, however, that there needs to be more built-in support for software. I'm sure that will find its way into apps such as XBMC and Plex eventually.
This is going to be hardest for consumers to adopt who have sunk a lot of money into existing HDTV's...especially ones who 'claimed' 120hz refresh rates -- but won't work with 3D. My own TV is a low-end Westinghouse 1080p, so down the road I wouldn't mind upgrading...if the material and quality is there!
FYI: I had older shutter glasses on my old PC & CRT display -- with a fast enough refresh rate...no headaches; it's really not an issue (current demos have confirmed this).
I disagree with you there. Tom's article is a great Blu-ray 3D white paper, but it's not a Blu-ray 3D review. We did have to duplicate some of the information briefly so this article could stand on its own, but the focus of either article is quite different.
New tv's, special glasses, limited viewing angles, new media, new monitors, special software to play them, new blue ray players, etc.., etc...
Not to mention the general discomfort associated with having to watch things in 3d, the fact that 3d is NOT suitable for all situations, many people in the general public have an impairment that wont allow them to enjoy 3d, etc.., etc...
Let this fad fade away and quickly!!! Im not reinvesting thousands and thousands of dollars into this new marketing gimmick. Its another way for the entertainment industry to make even more money off us. Now the push it to make all movies 3d and charge a mandatory 15-20 bucks per ticket to see it.
Its just sad there is such a large portion of the population that mindlessly follows anything presented to them and like zombies will pay what they are told without regard to the cost/benefit ratio.