Modification de la carte graphique

Bonjours, je voudrais changer la carte graphique ou retaper mon ordi, car elle est rendu vieille, mais je l'aime :( Je ne sais pas trop quoi choisir ou qu'est-ce qui est compatible.

Mon ordinateur :
Operating System
Windows 8.1 64-bit
CPU
Intel Core i7 3770 @ 3.40GHz 41 °C
Ivy Bridge 22nm Technology
RAM
16,0 Go Dual-Channel DDR3 @ 798MHz (11-11-11-28)
Motherboard
ASUSTeK COMPUTER INC. CG8270 (LGA1155) 34 °C
Graphics
Acer X203W (1680x1050@60Hz)
1024MB ATI AMD Radeon HD 7700 Series (ASUStek Computer Inc) 36 °C
Storage
119GB SanDisk SSD U100 128GB (SATA (SSD))
2794GB Seagate ST3000DM001-9YN166 (SATA ) 40 °C
Optical Drives
ATAPI BD E DH12E3SH
Audio
Realtek High Definition Audio



Mother board:
Motherboard
Manufacturer ASUSTeK COMPUTER INC.
Model CG8270 (LGA1155)
Version Rev X.0x
Chipset Vendor Intel
Chipset Model Ivy Bridge
Chipset Revision 09
Southbridge Vendor Intel
Southbridge Model H77
Southbridge Revision 04
System Temperature 33 °C
BIOS
Brand American Megatrends Inc.
Version 0607
Date 2012-08-29
Voltage
CPU CORE 0.936 V
MEMORY CONTROLLER 1.000 V
AVCC 3.360 V
3VCC 3.360 V
VIN4 1.024 V
VIN6 1.568 V
VIN7 1.864 V
VIN8 0.936 V
VIN9 0.184 V
VIN10 1.024 V
VIN11 1.000 V
VIN12 1.568 V
VIN13 0.192 V
VIN14 0.264 V
PCI Data
Slot PCI-E
Slot Type PCI-E
Slot Usage In Use
Bus Width 32 bit
Slot Designation PCIEX16_1
Characteristics 3.3V, Shared, PME
Slot Number 0
Slot PCI-E
Slot Type PCI-E
Slot Usage In Use
Bus Width 32 bit
Slot Designation PCIEX16_2
Characteristics 3.3V, Shared, PME
Slot Number 1
Slot PCI-E
Slot Type PCI-E
Slot Usage Available
Bus Width 32 bit
Slot Designation PCIEX1_1
Characteristics 3.3V, Shared, PME
Slot Number 2
Slot PCI-E
Slot Type PCI-E
Slot Usage Available
Bus Width 32 bit
Slot Designation PCIEX1_2
Characteristics 3.3V, Shared, PME
Slot Number 3

Carte graphique :
Graphics
Monitor
Name Acer X203W on AMD Radeon HD 7700 Series
Current Resolution 1680x1050 pixels
Work Resolution 1680x1010 pixels
State Enabled, Primary, Output devices support
Monitor Width 1680
Monitor Height 1050
Monitor BPP 32 bits per pixel
Monitor Frequency 60 Hz
Device \\.\DISPLAY1\Monitor0
ATI AMD Radeon HD 7700 Series
Manufacturer ATI
Model AMD Radeon HD 7700 Series
Device ID 1002-683D
Subvendor ASUStek Computer Inc (1043)
Current Performance Level Level 0
Current GPU Clock 300 MHz
Current Memory Clock 150 MHz
Current Shader Clock 150 MHz
Voltage 0.825 V
GPU Clock 1020,0 MHz
Temperature 36 °C
Core Voltage 0.825 V
Driver version 22.19.162.4
BIOS Version 113-AD40500-110
Memory Type GDDR5
Memory 1024 MB
Bandwidth 73,6 GB/s
Count of performance levels : 2
Level 1 - "Perf Level 0"
GPU Clock 300 MHz
Shader Clock 150 MHz
Level 2 - "Perf Level 1"
GPU Clock 1020 MHz
Shader Clock 1150 MHz