|RAM can be a little confusing. What you're asking about is the RAM speed, not the timings. Timings is a completely different issue. Since you have DDR RAM, there are generally 3 different choices...DDR266, DDR333, DDR400. And because they are DDR, the speed can be refered to as either the bogus DDR speed or the actual speed (aka frequency).|
Here's how they breakdown:
DDR266 (aka PC2100) = 266MHz DDR = 133MHz actual
DDR333 (aka PC2700) = 333MHz DDR = 166MHz actual
DDR400 (aka PC3200) = 400MHz DDR = 200MHz actual
It appears that you have a mix of DDR266 & DDR400. Since DDR266 can't run at DDR400 speed (200MHz), the DDR400 has to drop it's speed to match the DDR266 (133MHz).
Socket A systems should run with the FSB:DRAM at 1:1...in other words, CPU at 200MHz : RAM at 200MHz. You're running it at 203MHz : 133MHz so the DDR266 RAM is choking your system's performance.
Get rid of the DDR266 & replace it with another stick of DDR400.