salam sejahtera gan..

Gan ane mau nanya, kemaren ane upgrade drivers ane ke versi terbaru yang kata websitenya compatible sama kompi ane..

trus waktu ane selesai upgrade processor rating nya turun dari 6.9 ke 3.9..
ane mau balik lagi ke versi lama tapi ane ga tau versi berapa gan..

spec kompi ane:

ACER ASPIRE 4755G
- Processor
Intel® Core™ i5-2410M processor (3 MB L3 cache, 2.30 GHz with Turbo Boost up to 2.90/3/3.20/3.30 GHz, DDR3 1333 MHz, 35 W), supporting Intel® 64 architecture, Intel® Smart Cache

- Graphics:
NVIDIA® GeForce® GT 540M with NVIDIA® Optimus™ technology (2048/1024 MB of dedicated DDR3 VRAM), supporting NVIDIA® CUDA™, PhysX™, PureVideo® HD technology, OpenEXR High Dynamic-Range (HDR) technology, Shader Model 5.0, Microsoft® DirectX® 11

- Memory:
Dual-channel DDR3 SDRAM support Up to 4 GB of DDR3 system memory, upgradable to 8 GB using two soDIMM modules

- Operating System:
Genuine Windows® 7 Home Premium 64-bit

Mohon bantuannya gan!!