I'll try to explain this one more time. In the sound options in the windows control panel, the picture it's showing doesn't matter a damn. It's only a simple way to show if you are on 2 speakers, 4 speakers, 5.1 speakers or 7.1. It could show the two rear speakers up beside the two front speakers, and it wouldn't matter because the film or game will still send the sounds to where ever you have placed the physical speakers in your home.
Now if you start a game, it checks to see are you using stereo, quad surround, 5.1 or 7.1(if the game supports it) It doesn't look at the picture in the control panel and go, oh I must send the sound more to the side than the rear. No, it just checks what speaker configuration you have. The game engine then works out which speaker to send the sounds to based on that..
I put surround sound to the test as i can have both the Xonar DG and onboard Realtek ALC892 installed at the same time (i can select between them via the windows sound properties

). The Xonar driver dispays the side/rear seakers as side left & right and the Realtek driver displays the side/rear speakers as rear left & right (driver defaults and i don't think they can be changed). This is what i found when testing using a cheap Logitech Z506 5.1 setup:
Realtek ALC892:
Front Audio: Comes from center and front left & right speakers.
Left Audio: Comes from front & rear left speakers.
Right Audio: Comes from front & rear right speakers.
Rear Audio : comes from rear left & right speakers.
Xonar DG:
Front Audio: Comes from center and front left & right speakers.
Left Audio: Comes mainly from side left speaker.
Right Audio: Comes mainly from side right speaker.
Rear Audio: Comes from side left & right speakers but is VERY quiet... I can hardly tell if anything's behind me at all!
How can this be explained? The game can detect 5.1 sound if it's enabled in Windows, but it's the audio device drivers that direct the in-game sounds to the correct speakers. You or others can test this too if you want (if you have a Xonar DG and onboard audio supporting 5.1).
5.1 is 5.1, some diagrams show the speakers behind, some diagrams show them at the sides. It doesn't matter, it's the exact same thing. The sound is still going to come from where ever you have placed the speakers.
The Realtek shows them as rear speakers and i can hear the rear audio just fine. The Xonar on the other hand shows them as side speakers and sounds that are meant to be coming from behind can barely be heard!
Wait, you only have 2 speakers? There is no surround configs in windows. If you only have 2 speakers changing the number of speakers in the windows control panel wont do any kind of virtual surround or anything like that. Setting the number of speakers to 5.1 won't magically make the sound come from behind you in a 2 speaker setup..
I was trying out a Logitech Z506 setup that i bought for my brother (i've decided against 5.1 for now as it seems wasted on a Xonar DG card).
Really? Well, it's your money.
I thought the Senns were great for gaming... That's until my partner bought a £40 Turtle Beach X12 Headset for her Xbox 360. I tried them with my PC and the sound with games seems wider or more spacious (i can hear things from further away). The senns have exceptional sound quality (and they should do given the price) but the sound for gaming is not as good as i first thought. They can stay downstairs where they belong.
I use 8 channel. Don't think there is too much difference.
Is that with a stereo headset/headphones? I've noticed Windows will automatically change the speaker config to 7.1 when i select 8 channles for FP headphones. I thought Dolby Headphone mimicked virtual surround for 2 channel/stereo heaphones? I can also hear a slight tinny echo or reverb affect in games when using Dolby Headphone... Is this normal?