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WoW 4.2 PTR: World of Warcraft 64-bit Client?

We found a new change in the newest Patch 4.2 PTR client, it seems that Blizzard is getting ready to release a 64-bit version of the WoW client.

Code

GlueStrings.lua
if ( IsWindowsClient() ) then
if ( Is64BitClient() ) then
dllURL = SCANDLL_URL_WIN64_SCAN_DLL;
else
dllURL = SCANDLL_URL_WIN32_SCAN_DLL;
end
end
AccountLogin.lua
SCANDLL_URL_WIN32_SCAN_DLL = "http://us.scan.worldofwarcraft.com/update/Scan.dll";
SCANDLL_URL_WIN64_SCAN_DLL = "http://us.scan.worldofwarcraft.com/update/Scan-64.dll";

The code means two things:

1. People with 64-bit Operating Systems will see a slight increase in performance.

2. People who regularly experiences crashes when World of Warcraft uses too much memory will finally be able to play WoW without crashing every x hours/minutes. (People playing in super high resolution, or with a boatload of addons)

This code was just added into the game and it hasn't taken effect, however, this must be good news for players who are using a 64-bit OS. So, let’s make a guess, when will this code begin to work?

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WoW 4.2 PTR: World of Warcraft 64-bit Client?

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