Help me figure out my memory

[Jack31081]

Couldn't think of a better way to word it. I have 1GB of Kingston HyperX PC3200 DDR in my machine, rated at 2-3-2-6. While going about the very early phases of some overclock testing with the CPU, I wanted to see if my memory was running 1:1 with the FSB (HTT) of my CPU (Athlon 64 3200+).

So I opened up SiSoft Sandra 2005 and ran the memory benchmark. I was running the CPU at 216MHzx10, so I figured that ideally the memory would be running at DDR433 speeds (216MHz). Well, here's the output from Sandra:

SiSoftware Sandra

Benchmark Results
RAM Bandwidth Int Buff'd iSSE2 : 6001 MB/s
RAM Bandwidth Float Buff'd iSSE2 : 5927 MB/s

Int Buff'd iSSE2 (Integer STREAM) Results Breakdown
Assignment : 6028MB/s
Scaling : 6032MB/s
Addition : 5969MB/s
Triad : 5978MB/s
Data Item Size : 16 byte(s)
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 87% (estimated)

Float Buff'd iSSE2 (Float STREAM) Results Breakdown
Assignment : 6011MB/s
Scaling : 6027MB/s
Addition : 5855MB/s
Triad : 5815MB/s
Data Item Size : 16 byte(s)
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 86% (estimated)

Performance Test Status
Run ID : GAMEBREAKER on Sunday, January 23, 2005 at 1:49:43 AM
Memory Used by Test : 512MB
NUMA Support : No
SMP Test : No
Total Test Threads : 1
SMT Test : No
Dynamic MP/MT Load Balance : No
Processor Affinity : P0
Page Size : 4kB
Use Large Memory Pages : No

Chipset 1
Model : Advanced Micro Devices (AMD) Athlon 64 / Opteron HyperTransport Technology Configuration
Front Side Bus Speed : 2x 1080MHz (2160MHz data rate)
In/Out Width : 16-bit / 16-bit
Maximum Bus Bandwidth : 8640MB/s (estimated)

Logical/Chipset 1 Memory Banks
Bank 0 : 512MB DDR-SDRAM 2.0-3-2-2CL 2CMD
Bank 1 : 512MB DDR-SDRAM 2.0-3-2-2CL 2CMD
Channels : 1
Bank Interleave : 2-way
Speed : 2x 216MHz (432MHz data rate)
Width : 128-bit
Maximum Memory Bus Bandwidth : 6912MB/s (estimated)

The bold parts are the areas of interest. First, the results. They were higher than any of the reference data sets. The highest benched reference data set is called "Intel 925XE 2xPC2-5300 CL4" and it's rated at 5704/5709 while I got 6001/5927. Is this normal? I don't really know how to interpret this.

Second, it says only 512MB were used. Why is that? The system knows there is 1GB of memory in there.

Third, look at Bank 0 and Bank 1. The timings it gives are 2.0-3-2-2CL 2CMD. First, how does this relate to 2-3-2-6 (CAS-tRCD-tRP-tRAS)?? I set these values explicitly in BIOS, so why is that not what's displayed?

I could use some info here. Thanks.