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I am having major lag issues when i join a server. my ping is around 45-75.

Pc specs; Windows 7 64 bit SP1, Intel Core2 Quad CPU Q6600 @ 2.40 GHz, 6.00Gb RAM, ATI Radeon HD 4800 Series.

I run the game at max stetting when i create a local co-op game and have no lag. But on multiplayer it lags even on medium settings. I run the game in max resolution. 1980 x 1050 or something like that. At 60hz refresh rate.

How can i fix this lag?

Check ingame if your ping goes up and down, if its stable it might be from your hardware

HD 4800 doesn't sound that powerful to me... o_O

And you just mean Full HD, 1920x1080, huh? Not 1680x1050?

OK so the ping is stable, my video card is this; SAPPHIRE 100259L Radeon HD 4870 512MB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card,

Here is a ling to a newegg site with it. Newegg.com - SAPPHIRE 100259L Radeon HD 4870 512MB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card

"OUT OF STOCK."

"OUT OF STOCK."

512MB is not enough for big maps on high settings. fact.

Daniel wrote:512MB is not enough for big maps on high settings. fact.

How much do big maps use?

CrazyNinja0 wrote:I am having major lag issues when i join a server. my ping is around 45-75.

What are your FPS at the time of this 'lag'?

If you have some kind of on-screen fps counter [like fraps] you can use that, or if you don't you can open the console in-game (~ key) and type:

renderer.drawfps 1

This will tell you your FPS. I believe it's the first of the two numbers.

[R-CON]Psyrus wrote:How much do big maps use?

[/QUOTE]

between 500 and 1000 MB of graphic memory I guess, but I know that my 2GB RAM from my older PC where not enough to play big maps, so at least you need more than 2 GB RAM (not graphics memory) to play on high with no lag and high fps...

Daniel wrote:512MB is not enough for big maps on high settings. fact.

Daniel wrote:between 500 and 1000 MB of graphic memory I guess, but I know that my 2GB RAM from my older PC where not enough to play big maps, so at least you need more than 2 GB RAM (not graphics memory) to play on high with no lag and high fps...

Saying fact, and then not knowing the figure doesn't lend you much credence... 4GB of system RAM is well known to yield decent performance with PR.

CrazyNinja0 wrote:OK so the ping is stable, my video card is this;

You should check your FPS