There will be sixty-one (61) random, computer-generated winning times during the Game Period. If you are the first player to play the Game at or after one of the randomly generated times, you will be a potential winner of the prize indicated. The odds of winning each prize depend on how soon you play the Game after a winning time is designated.
Taken from
here
So there isn't a pattern or anything its random times of day.
Prizes:
Prize Description Number to be Awarded
Approximate
Retail Value of Each Prize
LiquidXS Crossfire (VISTA Premium System)
1
US$5,000.00
Dell XPS M2010 (VISTA Premium System)
1
US$3,700.00
Gateway FX510XG (VISTA Premium System)
2
US$2,600.00
A bundle of an ASUS M2R32-MVP motherboard; an RX1950 CF Edition; and an RX1950 XTX
5
US$1,187.99
A bundle of an ECS RS485MM-M (v1.0) motherboard and a TV Wonder 650 series tuner card
3
US$ 199.99
A bundle of an ECS RS485MM-M (v1.0) motherboard and a TV Wonder 200 series tuner card
2
US$ 129.99
TV Wonder 650 series tuner card
5
US$ 129.99
ATI Radeon® X1300 Pro
10
US$ 110.00
ATI Radeon® X1600 Pro
6
US$ 200.00
Box 360 Game Console
5
US$ 399.99
Westinghouse 27? LCD HDTV
2
US$ 899.99
Motorola RAZR V3 handheld
4
US$ 299.99
A bundle of three (3) PC games (Prey, Guild Wars Nightfall and Rainbow Six)
15
US$ 149.97
TOTAL
61
US$30,899.29