Haswell mobos Ram freq and iGpu shared memory limit ?

Does the Haswell mobos only can handle max 1600 Rams, and their max shared iGpu memory is 1024 mb?
I checked many Asus B85,H87 mobos and i dont understand it.
If an Ivy mobo on the same price can handle more than 1600mhz, and can do ~1700 shared memory, why Haswell doesnt?
Am i missed something?
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More about haswell mobos ram freq igpu shared memory limit
  1. Best answer
    The stock speed is 1600 for both ib and hw. Any speed above that is an overclock so will need a mobo that can oc. All intel hd are 1.7GB max shared memory.
  2. Asus B85M-G Haswell
    4 x DIMM, Max. 32GB, DDR3 1600/1333/1066 MHz
    Maximum shared memory of 1024 MB

    Asus P8B75-V Ivy
    4 x DIMM, Max. 32GB, DDR3 2200(O.C.)/2133(O.C.)/2000(O.C.)/1866(O.C.)/1600/1333/1066 MHz
    Maximum shared memory of 1696 MB
  3. B75 being able to oc is just an incorrect listing. If you google that mobo, there is quite a lot of people reporting it doesn't actually oc. The ability to oc on chipsets is controlled by intel. The 1.7gb max is intel specs. Mobos may not have the option to go that high. But the igpu is too weak to really use that much and windows shares more on top of that amount so isn't an issue.
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