The reasons your score dropped some is the lack of PhysX. 3D Mark was tailored to Nvidia cards, thus they normally almost always perform better due to PhysX. Your scores are right where they should be in my opinion with a single 5770, your Vantage score should be somewhere around 9000 as well.
Overclock both 5770s to 900 MHZ 1300 MHZ. Your score will go to 20k+ very easily. Any GPU that scores higher than that is an Nvidia GPU with Phsyx which is what vantage/3dmark are catered to thus their considered "fastest" by Futuremark's terms.
Benchmarks and 3DMark are screwing you and your lives over, just get over the fact of the synthetic benchmarks and be satisfied about what you have without peaking at the cheats (if you know what I mean.. im relating the two) You see, benchmarks are like cheats.. if you like what you are getting with the cheats, you can't get enough.. and thats what is pulling the money out your pockets (the greed of getting the best or getting better). Get whats good because the best don't stay best for long, and the good does. Keep the addictions coming baby.
yes, 14592 is around the score you should get in Vantage with 2x 5770s. 1x 5770 will core 8-9k add about 50% performance should be 14-15k with the second card. You shouldn't worry too much about your 3DM scores though. Go play some actual games and you'll notice the difference
Edit: Make sure when you oc'ed your cards you increased the fan speed to 50%+ otherwise heat issues could be a problem.
The only way to fix this is to restart the PC but I can't even restart it normally because I get BSOD when I press the restart button, start a game or restart the player. Before 10.2 I had the infamous gray screen with stripes but 10.2 fixed all my problems except this one. Is this caused by my 350W PSU? I can play games or stress the PC with Furmark/Heaven and it doesn't crash. I had a 8800 GTS 512 which requires more power than the 5770 but I had no problem with it.
You really should have at least a 450W PSU for the 5770. Be careful or you might fry some components by undervolting them. (especially while gaming). I recommend upgrading your PSU then see if you still have the issues.
I am reading all of these posted 3dMark06 scores for the HD 5770/CF 5770 setups. I had 8 of these cards at one time. 4 Referance/4 Non-Ref Sapphire HD 5770's and I did alot of testing and benchmarking!
Now if my 965 setup was at stock (3.4GHz) a single HD 5770 no matter which card(ref or non) would score just over 17K on every 06 benchmark I ran, even within 200 or so points, which IMO is rediculously consistant for 06 benching! Crossfire 2 HD 5770's (ref or not) and I would be looking at right around 19,200, again no matter what card I used in either PCIe slot, every score was within 200-300 points! The highest score I ever got on 06 with both my cpu OC and gpu OC to the max was 22,468
Then I got the i7 930 setup, and I really don't recall what my scores were running the cpu and 2 gpu's @ stock, but I can tell you with the cpu OCed to 4.169GHz and the 2 gpu's running at 935 core/1230 mem I hit 26,410 on 06, which to date is my highest score.
The bottom line - 2 HD 5770's Crossfired is a BA setup! These cards scale EXTREMELY well in Crossfire mode and with the 128mb interfaces, thats basically exactly what they were meant for!!! 128x2=256!