Je ne suis peut-etre pas dans le bon trou...

Bonjour,
j'aimerias installer une carte graphique radeon 9550 sur ma carte mere mais elle ne rentre pas ou alors je n'essaie pas de lenfoncer dans le bon trou. cpuz me donne:
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CPU-Z version 1.50
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Processors Map
------------------------------------------------------------------------------------

Number of processors 1
Number of threads 2

Processor 0
-- Core 0
-- Thread 0
-- Core 1
-- Thread 0

Processors Information
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Processor 1 (ID = 0)
Number of cores 2 (max 2)
Number of threads 2 (max 2)
Name Intel Pentium E2140
Codename Conroe
Specification Genuine Intel(R) CPU 2140 @ 1.60GHz
Package Socket 775 LGA (platform ID = 0h)
CPUID 6.F.2
Extended CPUID 6.F
Core Stepping L2
Technology 65 nm
Core Speed 1197.2 MHz (6.0 x 199.5 MHz)
Rated Bus speed 798.1 MHz
Stock frequency 1600 MHz
Instructions sets MMX, SSE, SSE2, SSE3, SSSE3, EM64T
L1 Data cache 2 x 32 KBytes, 8-way set associative, 64-byte line size
L1 Instruction cache 2 x 32 KBytes, 8-way set associative, 64-byte line size
L2 cache 1024 KBytes, 4-way set associative, 64-byte line size
FID/VID Control yes
FID range 6.0x - 8.0x
max VID 1.325 V
Features XD

Chipset
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Northbridge VIA P4M890 rev. 00
Southbridge VIA VT8237 rev. 00
Graphic Interface AGP
AGP Revision 3.0
AGP Transfer Rate 8x
AGP SBA supported, enabled
Memory Type DDR2
Memory Size 1024 MBytes
Channels Single
Memory Frequency 266.0 MHz (3:4)
DRAM Interleave 4-way
CAS# 4.0
RAS# to CAS# 4
RAS# Precharge 4
Cycle Time (tRAS) 12
Command Rate 2T