Q: Why does the DRAM speed will not match with the setting value in BIOS? (KN9, KN9-S, KN9-Ultra, KN9 SLI, Fatal1ty AN9 32X, AN9 32X)
A:

According to the AMD BIOS and Kernel Developer's Guide Ver 2.01, the actual DRAM frequency may vary for some speeds based on the CPU multiplier factor and other configuration options, as shown in Figure1.

BIOS DRAMConfiguration
MultiplierFactor DDR400(200MHz) DDR533(266MHz) DDR667(333MHz) DDR800(400MHz)
4 160 160 160 160
5 200 200 200 200
6 200 240 240 240
7 200 233 280 280
8 200 266 320 320
9 200 257 300 360
10 200 250 333 400
11 200 244 314 366
12 200 266 300 400
13 200 260 325 371
14 200 254 311 400
15 200 250 333 375
16 200 266 320 400
17 200 261 309 377