Comparative reviews of Haswell processors?

Question

Iron

Recently I thought about assembling a small home "server" with passive cooling, and was horrified to find that it was almost impossible to find comparative reviews of processors on the net. No, there are reviews of top processors, but basically this is just a comparison of parrots, without any serious conclusions about the impact on performance of various chips.
This upset me a little.
I actually face the choice of Core i5 - 4670T (4-core, 2.3 GHz, L2 - 1024, L3 - 6144, 45 W) vs Core i7 - 4765T (4-core, 2.0 GHz, L2 - 1024, L3 - 8192, 35 W). What the 4765T says is that it supports HT and can work with 8 threads, but its frequency is lower.
Does anyone have any thoughts on this choice?
And even better arguments with links. :)
PS Regarding the issue of heat dissipation. Such a building is planned . According to the manufacturer, it is capable of discharging up to 75W. Well, what will come of this, I will definitely write on Habré as soon as the system is fully assembled.

Answer 1

I think the Core i7 - 4765T is better for the server, because.
1) HyperThreading usually gives a percentage increase of 20-30%, which is more than 2.3 / 2.0 (15%);
2) TDP is lower, which means you can get these same 2.3 GHz by overclocking with less heat dissipation. Typically, Core 7s run significantly faster even without raising the voltage (although the same is true for the i5).
3) More cache.
Unfortunately, I did not find these processors in the ratings.
PS I have a doubt about the real TDP difference between these two processors. Rather, it is just a formality or marketing.

Answer 2

Greetings
All information about the heat dissipation of processors can be found on the manufacturer's website.
Regarding cooling, it is better to read tests not of processors, but tests of cooling systems, and it is clear which coolers cope with the task of silent cooling.
There were even statistics on how many degrees per unit of productivity and so on.
Large heatsink to cope with the task of cooling 45 watts.
However, this will not fit into your case in height, but it is worth looking for rarer solutions, or use a thicker case. Height thickness = small.

Answer 3

Sorry, I may have misunderstood.
If the software does not take into account the capabilities of this processor, then the superiority is illusory.