Installed memory today, questions immediately

[justin v]

I installed 4GB or memory today.  I rebooted and see this, the first line  
after the splash menu thing:

983040K of memory above 4GB ignored

dmesg shows avail mem amount and I am concerned as well:

real memory  = 4294967296 (4096 MB)
avail memory = 3139940352 (2994 MB)

is a stick bad perhaps?




yeaguy# dmidecode -t memory
# dmidecode 2.10
SMBIOS 2.3 present.

Handle 0x1000, DMI type 16, 15 bytes
Physical Memory Array
	Location: System Board Or Motherboard
	Use: System Memory
	Error Correction Type: Single-bit ECC
	Maximum Capacity: 1 GB
	Error Information Handle: Not Provided
	Number Of Devices: 4

Handle 0x1100, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x1000
	Error Information Handle: Not Provided
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 1024 MB
	Form Factor: DIMM
	Set: None
	Locator: DIMM_1
	Bank Locator: Not Specified
	Type: DDR
	Type Detail: Synchronous
	Speed: 800 MHz
	Manufacturer: 7F7F7F7F7F9B0000
	Serial Number: 00000000
	Asset Tag: 000A28
	Part Number: CT12864AA800.M8FH

Handle 0x1101, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x1000
	Error Information Handle: Not Provided
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 1024 MB
	Form Factor: DIMM
	Set: None
	Locator: DIMM_3
	Bank Locator: Not Specified
	Type: DDR
	Type Detail: Synchronous
	Speed: 800 MHz
	Manufacturer: 7F7F7F7F7F9B0000
	Serial Number: 00000000
	Asset Tag: 000A28
	Part Number: CT12864AA800.M8FH

Handle 0x1102, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x1000
	Error Information Handle: Not Provided
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 1024 MB
	Form Factor: DIMM
	Set: None
	Locator: DIMM_2
	Bank Locator: Not Specified
	Type: DDR
	Type Detail: Synchronous
	Speed: 800 MHz
	Manufacturer: 7F7F7F7F7F9B0000
	Serial Number: 00000000
	Asset Tag: 000A28
	Part Number: CT12864AA800.M8FH

Handle 0x1103, DMI type 17, 27 bytes
Memory Device
	Array Handle: 0x1000
	Error Information Handle: Not Provided
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 1024 MB
	Form Factor: DIMM
	Set: None
	Locator: DIMM_4
	Bank Locator: Not Specified
	Type: DDR
	Type Detail: Synchronous
	Speed: 800 MHz
	Manufacturer: 7F7F7F7F7F9B0000
	Serial Number: 00000000
	Asset Tag: 000A28
	Part Number: CT12864AA800.M8FH

yeaguy#