Hello. I have long been plagued by lag in the game, namely to T3 in the Firestorm Citadel, at what my computer entirely meets the minimum system requirements:

Operating System: Windows 7 Домашняя базовая 32-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.110408-1631)
Processor: AMD Athlon(tm) II Dual-Core M320 (2 CPUs), ~2.1GHz
Memory: 2048MB RAM
Available OS Memory: 2046MB RAM
Page File: 1740MB used, 2352MB available
DirectX Version: DirectX 11
Card name: ATI Mobility Radeon HD 5470
Manufacturer: ATI Technologies Inc.
Chip type: ATI display adapter (0x68E0)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_68E0&SUBSYS_C553144D&REV_00
Display Memory: 1264 MB
Dedicated Memory: 505 MB
Shared Memory: 759 MB
Current Mode: 1366 x 768 (32 bit) (60Hz)

All that is written on the forum did not help me. How can I solve my problem?
I know that there are many other similar themes, but there I did not find an answer.

P.S. Sorry for my english, i am russian)