i used this guide to set mine just now complete w new acer logo.
http://goo.gl/wNxYC
my sys properties

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EDIT : modified manufacturer details.heheheh

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Hi All,
I'm a new 4830tg user. Need to check with you guys, how can i force enable to use the 540m display instead of the Intel HD? I tried using optimus, but nothing seems to happen.

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Added on July 29, 2011, 3:12 amAm trying to play GTA4, it kept saying that my video resource is 128mb, i thought it shoud be higher

I guess I put this info here since I don't think a lot of people will buy 4743 series laptop, but this is Optimus specific problem.

Anyone have problems playing GTA IV with Optimus? Specifically missing texture? I got a fix. Create commandline.txt in GTAIV directory and put "–availablevidmem 8".

The number 8 is the multiplier of the VRAM you got, sadly GTAIV only detect integrated Intel HD even if it run on dedicated card so your VRAM is around 50-200MB at most, so using this it will multiply the VRAM so it detect you have more VRAM and so it won't have missing texture.

Surprisingly even GT 520M is capable of playing GTAIV at medium setting and native resolution! This is astonishing as previous HD5470 with nearly similar spec is not capable of playing it at more than 1024x600 low detail without crawling to a standstill. The build-in benchmark tell I get average of 33fps at the specific setting

but when i use cpu-z to check is say 665.2

Intel Core i5
Windows 7 Home Premium Edition SP1 (Build 7601)
CPU Arch : 1 CPU - 2 Cores - 4 Threads
CPU PSN : Intel Core i5-2410M CPU @ 2.30GHz
CPU EXT : MMX, SSE (1, 2, 3, 3S, 4.1, 4.2), EM64T, VT-x, AVX
CPUID : 6.A.7 / Extended : 6.2A
CPU Cache : L1 : 2 x 32 / 2 x 32 KB - L2 : 2 x 256 KB
CPU Cache : L3 : 3072 KB
Core : Sandy Bridge (32 nm) / Stepping : D2
Freq : 798.16 MHz (99.77 * 8)
MB Brand : Acer
MB Model : JM40_HR
NB : Intel Sandy Bridge rev 09
SB : Intel HM65 rev B2
GPU Type : Intel® HD Graphics Family
DirectX Version : 11.0
RAM : 8192 MB DDR3 Dual Channel
RAM Speed : 665.2 MHz (1:5) @ 9-9-9-24
Slot 1 : 4096MB (10700)
Slot 1 Manufacturer : Kingston
Slot 2 : 4096MB (10700)
Slot 2 Manufacturer : Samsung

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Added on August 7, 2011, 9:01 pmjust notice that i got 2 difference ram 1 kingston 1 samsung. acer original ram is kingston or samsung?