Bios HP TK5735

[krzysiek841]

Hello
Please help me with the bios
i have a HP Thin Client with this bios and i have made a mod in the thin client.
have soldered a second memory socket DDR2 so-dimm and tried to put in 2x2 GB RAM into the TK
i have tested it but with 2x2GB the TK dont work (it starts and shows 3,5GB but several systems didn't start) with 3GB all is ok.
i am 99% sure that the bios have some kind of memory limitation thats why it shows 3,5GB not 4GB.
the cpu is 64bit and operating systems tested are 64 bit
have tested win7 64, win8.1 64bit both restarts the TK after start about 10 sec
windows miniPE XP from cd launched normally (i think its 32bit) and shows 3,5GB same as the bios shows but i have run there a cpu-z and it showed me normally 4GB (2x2GB). in socket 1 2GB running normally in socket 2 2GB runs normally too, 3GB (2+1) runs normally too, but 2x2GB not. i think that the bios should show normally 4GB. both of the 2GB kingston modules are identikal