troubleshooting Question

CPU FSB ,Memory speed question

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robin_alexander asked on
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Hello everybody............First of all here is the CPU-Z report

Number of CPUs 2 (1 Physical)
Name Intel Pentium 4 540
Code Name Prescott
Specification Intel(R) Pentium(R) 4 CPU 3.20GHz
Family / Model / Stepping F 4 1
Extended Family / Model 0 0
Package LGA775
Core Stepping E0
Technology 0.09 µ
Supported Instructions Sets MMX, SSE, SSE2, SSE3
CPU Clock Speed 3191.9 MHz
Clock multiplier x 16.0
Front Side Bus Frequency 199.5 MHz
Bus Speed 798.0 MHz
L1 Data Cache 16 KBytes, 8-way set associative, 64 Bytes line size
L1 Trace Cache 12 Kµops, 8-way set associative
L2 Cache 1024 KBytes, 8-way set associative, 64 Bytes line size
L2 Speed 3191.9 MHz (Full)
L2 Location On Chip
L2 Data Prefetch Logic yes
L2 Bus Width 256 bits
CPU Name Intel Pentium 4 540 (logical unit)
Mainboard and chipset  
Motherboard manufacturer Dell Inc.
Motherboard model 0U7077,  
BIOS vendor Dell Inc.
BIOS revision A03
BIOS release date 10/11/2004
Chipset Intel i925X rev. B1
Southbridge Intel 82801FB (ICH6) rev. 03
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
DRAM Size 2560 MBytes
DRAM Frequency 199.5 MHz
CAS# Latency 3.0 clocks
RAS# to CAS# 3 clocks
RAS# Precharge 3 clocks
Cycle Time (TRAS) 9 clocks
# of memory modules 4
Module 0 Samsung DDR2-SDRAM PC3200 - 256 MBytes
Module 1 Kingston DDR2-SDRAM PC4300 - 1024 MBytes
Module 2 Samsung DDR2-SDRAM PC3200 - 256 MBytes
Module 3 Kingston DDR2-SDRAM PC4300 - 1024 MBytes
Windows version Microsoft Windows XP Home Edition Service Pack 2 (Build 2600)  
DirectX version 9.0c

My questions are.......
1.What exactly does FSB denote ?
2.Dell sold me the pc saying that my FSB is 800 MHz ,but cpu-z shows it as 199.5 MHz.Why is that so ?
3.I have a pair of PC3200 and PC4300 RAM, the RAM is supposed to operate at the lowest of the two 400 MHz ....But this utility shows the frequency as 199.5 MHz ...Why is that so ?
4.I have another software celled Everest Home edition installed in my pc. Under the motherboard >SPD  tab,my Kingston PC4300 chip is shown to be running at 266 MHz,while it should be actually be shown as double of that .Why is that so ?
5.Under the memory timing section there are two sets of latencies shown for 266 MHZ .there is also another set of timings for 200 MHz.which of these is correct ?
i would have pasted the everest report here.......but its too too big...............
6.will my motherboard support the Intel 840 extreme edition cpu ?
7.will i have any significant change in performance with respect to my present 3.2 HT ?...i do a lot of gaming like HL 2,BF 2,Quake 3,Doom 3 etc

Here is the Everest Memory report........
 [ DIMM1: Samsung M3 78T3354BG0-CCC ]  
  Memory Module Properties:  
   Module Name   Samsung M3 78T3354BG0-CCC  
   Serial Number   46028230h  
   Module Size   256 MB (1 rows, 4 banks)  
   Module Type   Unbuffered  
   Memory Type   DDR2 SDRAM  
   Memory Speed   DDR2-400 (200 MHz)  
   Module Width   64 bit  
   Module Voltage   SSTL 1.8  
   Error Detection Method   None  
   Refresh Rate   Reduced (7.8 us)  
  Memory Timings:  
   @ 200 MHz   5.0-3-3-8 (CL-RCD-RP-RAS)  
   @ 200 MHz   4.0-3-3-8 (CL-RCD-RP-RAS)  
   @ 200 MHz   3.0-3-3-8 (CL-RCD-RP-RAS)  
  Corsair Xpert:  
   Frequency   655 MHz  
   Temperature   51 °C (124 °F)  
   Voltage   0.01 V  
 [ DIMM2: Kingston (1 GB DDR2-533 DDR2 SDRAM) ]  
  Memory Module Properties:  
   Module Name   Kingston  
   Serial Number   78387FF2h  
   Manufacture Date   Week 21 / 2005  
   Module Size   1024 MB (2 rows, 4 banks)  
   Module Type   Unbuffered  
   Memory Type   DDR2 SDRAM  
   Memory Speed   DDR2-533 (266 MHz)  
   Module Width   64 bit  
   Module Voltage   SSTL 1.8  
   Error Detection Method   None  
   Refresh Rate   Reduced (7.8 us), Self-Refresh  
  Memory Timings:  
   @ 266 MHz   5.0-4-4-12 (CL-RCD-RP-RAS)  
   @ 266 MHz   4.0-4-4-12 (CL-RCD-RP-RAS)  
   @ 200 MHz   3.0-3-3-9 (CL-RCD-RP-RAS)  

8.what is that "Corsair expert " thing  in my DIMM 1 ?.......i dont have Corsair memory in my pc ............
Thank you for taking time to read the whole thing.......too bad that i cannot give more than 500 points.............
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