Originally Posted by Heavy MG
I'm sure you get what I meant by OC'ing to turbo frequency seeing as you have an i5-2400,even with locked Intel chips you can run them on their fastest Turbo multiplier.
i wasn't clear by saying "locked" sorry, that does make it sound like locked multiplier only. an i3 does NOT have turbo boost; the only way to adjust the speed is through the BCLK.
i hope that was clear
Originally Posted by SpacemanSpliff
Also, Looniam, The point that they are trying to make to you is that by running at stock clocks any CPU or APU does not meet it's max TDP rating at max load, even at overclocks this doesn't happen...
For example my FX-8120 at a 4.2 OC... max power draw during an IBT run... 116W and change... It's rated at 125W at stock clocks... If I dialed it back to stock settings and choose to limit it to a certain level of power consumption, guess what, that's not to difficult to do within Windows or Catalyst, and I'm sure you can find a way to do so in BIOS as well.
i understand the TDP does not mean how much power the APU/CPU draws but how much heat it is designed to "give off". however it will give a good ballpark figure as to how much power it will consume. to say that an APU/CPU's power consumption will not exceed the TDP is not correct. it is similar to a PSU albeit with very low efficiency because aside from calculations via the switches it is not doing any mechanical work nor being converted to another form of output. but it will use more power than the power loss through heat given off. to put it simply, the TDP is how much energy can potentially be lost.
the power consumption of overclocking a APU/CPU can and will
exceed the TDP.
though i used the TDP as a reference there are many measurements/benchmarks showing actual useage and not "speculation". best case scenario would be to assume the measurements were taken with a kill-o-watt meter from the wall and account for the PSU's efficiency. since the rating would be hopefully 80% then 143*0.8 still puts the power draw @ 114.4. at worse the efficiency would be 70% that would be the draw at ~100 watts. in both the best and worse case scenarios it puts the draw over 90 watts. and if you look at the systems benchmarked, none of them had more than what would be required to run a system, APU, motherboard, SSD and RAM; some pretty barebones stuff. nothing out of the ordinary for it to be able to be used for a reference.
and i know from undervolting myself that the usage will decrease. its not hard to go into the BIOS and manually adjust the vcore and then test for stability. speed doesn't affect power as much as voltage which is exponential. so its not the core speed, though it does go up/down with it, but how much voltage is needed for that speed that affects power usage more. as much as there is a ceiling to as high voltage can be adjusted up to the is also a floor for the bare minimum and that will vary from chip to chip; a variable.
the bottom line is if someone wants to use a PSU that is underpowered for their system, fine. but there is a problem when using it as a sweeping generalization.
sorry if that
causes a problem