xeons are server cpus like opterons from amd and so they are made for a long time use and they have no problems to run on 100%.
only the 1245 series of xeon have gpus.
i told you how many bots can run on a hd 4000 igpu.
all benchmarks i am looking show builtin AMD/intel GPU from last generation is equivalent to $150 separate GPU, only when going to $250 GPU it starts to be faster, but those benchamrks are made with farcry/team fortres/whatever in mind and not by benchmarking 50+ WOW+HB instances on minimal detail
thats crap, a hd 7750 is roundabout 5x faster than intel hd 4000
the igpu versions iris/iris pro (intel hd 5000+) are up to 3-4x faster than a hd 4000
maybe a 4th gen cpu can kick the extra low gpu
but you wont find any benchmarks now for 4th gen cpus.
the better your graphic card, the more work from the cpu can be done by the gpu
so lets compare:
1. 4th gen cpu costs ~300?+
2. 3rd gen cpu + a hd 7750 f.e. costs ~300? max
the 2. is a bit in front of the first, because haswell is no significant faster than ivy, just a but and the gpu is faster much faster than a hd 4600 and a bit faster than than a gt3
this discussion is a bit uselesse, because it doesnt matter which way you go.
instead of a xeon you use a 6core xeon or i7, which can handle up to 70 bots - maybe a bit more. but the cpu costs ~600?/800$
sry have not much time now^^