there's really not much you can do, your ram isn't even name brand so it probably wouldn't run too much faster out of the specified speeds. And even if you overclock faster, it won't help because there's a bottleneck, your ram can fetch enough data to the cpu to be processed so your cpu can be running at 5.0Gs and it won't make a diff, the ram doesn't have the bandwidth to deliver. Sorry man, if you want to improve performance, you gotta get a new Motherboard, and new DDR ram, preferably some fast DDR, or when you have some dough, get some Dual Channel DDR.
without better memory the best you can hope for is that it burns in and with a little luck and winter temps you may get a little higher at best. do not turn up voltage to ram if your green at overclocking or you'll be making toast. like the guys said better ram is a must as well check out BIOS options to turn down memory settings but without bandwidth the extra mhz will not make much of a difference. But hey free mhz is always sweeet