我的64位WIN7旗舰版为什么还是不能支持8G内存?

我安装的WIN7旗舰版,64位系统,就是为了用足8G内存来的。
系统属性里显示8G内存可用的只有3.99G?

主板型号:微星(MSI)P55-GD55(INTEL P55/LGA 1156)
内存:威刚(V-Data)万紫千红 DDR3 1333 2G台式机内存×4
CPU:英特尔(Intel) 45纳米 酷睿i5 四核处理器 (LGA1156/2.66GHz/8M缓存)

以下CPU-Z导出的信息。

Number of cores 4 (max 8)
Number of threads 4 (max 16)
Name Intel Core i5 750
Codename Lynnfield
Specification Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz
Package (platform ID) Socket 1156 LGA (0x1)
CPUID 6.E.5
Extended CPUID 6.1E
Core Stepping B1
Technology 45 nm
Core Speed 3065.2 MHz
Multiplier x FSB 23.0 x 133.3 MHz
Rated Bus speed 2398.9 MHz
Stock frequency 2666 MHz

Chipset
-------------------------------------------------------------------------

Northbridge Intel DMI Host Bridge rev. 11
Southbridge Intel P55 rev. 06
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR3
Memory Size 8192 MBytes
Channels Dual
Memory Frequency 666.3 MHz (2:10)
CAS# latency (CL) 9.0
RAS# to CAS# delay (tRCD) 9
RAS# Precharge (tRP) 9
Cycle Time (tRAS) 24
Row Refresh Cycle Time (tRFC) 74
Command Rate (CR) 2T
Uncore Frequency 2132.3 MHz

Memory SPD
-------------------------------------------------------------------------

DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format UDIMM
Manufacturer (ID) A-Data Technology (7F7F7F7FCB000000)
Size 2048 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number
Manufacturing date Week 05/Year 10
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-17-23 @ 457 MHz
JEDEC #2 7.0-7-7-20-27 @ 533 MHz
JEDEC #3 8.0-8-8-22-30 @ 609 MHz
JEDEC #4 9.0-9-9-25-34 @ 685 MHz

Mainboard Model P55-GD55 (MS-7589) (0x000003F7 - 0x12733720)
主板肯定是支持8G的,主板COMS及各种软件都能显示这8G的内存。具体哪一项设置影响了WIN7全部调用内存呢?
4楼说的我设置过了,但还是没反应。之前我查2根内存的时候显示可用内存4G,现在插4根反而变成可用3.99G了。。

第1个回答  2010-05-05
主板不兼容