So far I have checked the forums thoroughly but I wasn't able to find settings for my mobo and this pair of ram

I have bought them cause I thought I would be able to reach 250FSB cause I couldn't with my prevoius OCZ.I'm a little bit frustrated to be honest. I need some help to make them run at 500MHz. Thanks in advance for any help I'll get from here

My rig is:
PSU:Tagan 480 Watt rev 01
Mobo:ASUS A8N SLI-Premium
CPU:AMD Athlon 64X2 3800+ rev.BH-E4
Ram:Gskil 2x1024 pc4000 (recently bought)b4 2or 3 days

I can't pass any test with them above 230FSB and LDT 4x
I would like to help me with timings if possible with my mobo so as to reach 2500GHz wthe proccessor and 500 MHZ the Ram. That's enough for me.

I increased the voltage to the CPU at 1.425v but I can't pass the mem test
PC can boot to windows though

Looking for settings and advices that will help me to get my goal