Barcelona Opteron 2350(B1) arrived

[kyosen]

FELIX kindly pointed out to me about K10's memory controller
According to AMD's document, BIOS and Kernel　Developer’s Guide,
K10's has 2 DCTs(DCT: Dram ConTroller!?), and it can work different two mode, i.e.,
(1) to behave as a single dual-channel DCT; this is called ganged mode;
(2) to behave as two single-channel DCTs; this is called unganged mode.

My understanding is:
Ganged mode reads or writes with 2 DCTs at the same time.
Unganged mode also can reads with 1 DCT and writes with another 1 DCT at the same time,
if the system requests as so.
Unganged mode is more flexible than ganged mode,
and ganged mode is equal to "conventional" dual channel mode.

Then, I noticed the BIOS setting, "Unganged Mode support".


So I tried SuperPI 4M in 3 case as below, and results:
with 1 memory module: 3m27.141s
with 2 memory modules, ganged mode: 3m24.438s
with 2 memory modules, unganged mode: 3m22.953s
and we can see CPU-Z and FELIX's test program properly detects
"conventional" dual channel mode
Default BIOS setting is "Unganged Mode = Enabled", and at least,
unganged mode looks faster than ganged mode for SuperPI.




And these are latecy test results with Everest Ultimate v4.20:
at 2.0G=200x10: 76.0ns
at 2.2G=220x10: 69.0ns
at 2.4G=240x10: 63.4ns
The latest Everest detects Barcelona properly




Thanks to everyone for many comments and suggestions
...but don't be bullying poor small AMD, hipro5 (yeah, just kidding )