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Haswell and power saving

Ill try that wazza, though iirc on my ib setups, using fixed voltage and c-states enabled the clockspeed dropped at idle but voltage remained constant if using fixed v. Perhaps it's different with hw?
 
yes haswell is different,i think its down to the onchip vrm's so fixed voltage will downclock at idle,even more so that using the mb/bios power saving or windows power saving
 
I just tried to go over 4ghz to 4.2 and the voltage shot up to 1.345 on auto vcore and temps went mad. Anything higher than 4ghz and i have to set manual. I set to 1.176 and oc to 4.4ghz. I have the c3 and c6/c7 enabled but the multiplier or voltage is not downclocking. Now for some strange reason not even realtemp is showing any down clock? not sure why i made sure they were all enabled in bios. It also said in my bios that uncore should be set same as or higher than the oc clock. I set that to 4.4ghz as well.

But i have low temps and 4.4ghz oc so im pleased with that. :D

WSLGkxNl.png.jpg

You can see max temp for that session was 65 and idles at 30-40.
 
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uncore can be a few clicks below your oc multi also

be sure to use latest cpu-z and use balanced power saving profile within windows power saving options
 
Is there an issue with coretemp and hw cpu's? Running 3dm11 just now, (which passed fine) but coretemp was only showing the clockspeed at 4450mhz despite 45x100 bclk set in bios. Also at idle, coretemp shows the vid at 0.825, this fluctuated under load. Cpu-z shows a constant 1.264 ono at load/idle.
 
Ok after changing the power options to balanced its working again. I had it on the samsung power options for the ssd, didn't realize it had a power profile. Now it down clocks to 800mhz but not much difference in temps and the voltage does not change.

I changed the minimum process state to 80% and it now idles at 3ghz with same temps.
 
Also groen, if you are running windows 7 you need service pack 1 installed. Gflops will be higher. Made this mistake with my 3570k a while back.
 
tried with tighter timings and less ram speed? 2133mhz 9-10-10-21-1t,max gflops I can do on ivy are 121 in linx,ive seen haswell do over 200
 
it helps if you can have tighter timings,try lower ram speed/tighter timings

Samsung green for me tends to tail off after 2200mhz from the aida64 memory benchmarks
 
groen said:
I increased the memory size on the linx and the gflops did not increase. Do you think its the ram timings? Its just a coincidence that my ram and oc clock are the same.
Click to expand...

Ah yep as setter says you need at least W7 SP1. The problem is it's not using the AVX instructions, which give double the performance.
 
RealTemp T|I Edition
http://www.overclock.net/t/1330144/realtemp-t-i-edition

If you want to see what C States your CPU is using, give the above version of RealTemp a try. You can have individual cores entering various C States as well as the entire CPU package entering various C States. Different motherboards and different bios versions handle these differently.

When C6 is being used, you can have individual cores spending over 99% of the time in C6 where the voltage going to the core is reduced to virtually zero. Monitoring apps that show you core voltage become meaningless because they are not accurate 99% of the time when the core is in C6. They might be accurate the other 1% of the time when the CPU is idle but that's debatable. CPUs are capable of changing states far faster than a monitoring app can keep up. Kind of like throwing darts at a funny car. You are not going to get it right very often.
 
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