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3770k clock display error ? - Page 2

post #11 of 16
CPUZ 1.62 is the first version that is starting to report Intel CPUs accurately when idle or lightly loaded. The 1600 MHz that previous versions used to show was often times not true.

RealTemp has been using the same monitoring method recommended by Intel since November 2008 when their first gen Core i CPUs were released. It tells you what your CPU is really doing when idle and if it doesn't show 1600 MHz then your CPU is not at 1600 MHz.

Here's an example.

http://img208.imageshack.us/img208/6694/realtempcpuz.png

And here's an example where RealTemp and CPU-Z 1.62 show a CPU that really is at 1608 MHz.

http://img585.imageshack.us/img585/9969/realtempcpuz2.png

For the second screen shot, I had to use the Windows Power Saver function in the Control Panel - Power Options but I wouldn't recommend doing this. Idle power consumption at the wall is exactly the same as the previous picture with the high multiplier. Running a Core i CPU this slow makes it inefficient and sluggish and doesn't save you anything. This Windows 7 "feature" prevents the CPU from increasing in speed when it should. Enabling the C3 and or C6 sleep states will minimize power consumption at idle whether the CPU multiplier is high or low. It's the best way to significantly decrease power consumption without killing light load performance.

When using Windows 7 Power Saver, it prevents the CPU from reaching full speed even when 1 core is fully loaded.
http://img141.imageshack.us/img141/8890/powersaver.png

Here's the same CPU after switching to Balanced.
http://img4.imageshack.us/img4/1273/balanced.png

Here's the science behind saving power. A fast CPU is efficient so it can get its processing done quickly and then get back into one of the low power sleep states.

Power Optimization – a Reality Check
http://www.cs.berkeley.edu/~krioukov/realityCheck.pdf

Maybe the Microsoft engineers finally realized that no one is running an 8086 any more so it was time to update Windows 8 based on how modern CPUs actually work. A low multiplier doesn't save you anything so there is no need for CPU-Z to report this anymore when it is not true.
post #12 of 16
I also have windows 8 which I bought, anyway cpuz, easy tuner, core temp, real temp all show me my correct speeds and drops down to 1600 at idle

if you changed your vcore to manual it won't downclock. and if you aren't using balanced setting in your windows power saving plan it won't either, or you may have changed
post #13 of 16
Thread Starter 
Then why the hell, about 3-4 months ago, when msi control center (mb software) was in another version, i saw under windows 7 1.6ghz in idle and 4.5ghz in load ? And now i see only 4.5ghz either idle or load ? And in the bios, im using the EXACT SAME overclocking settings. Program versions got stupid ?


Look at this, this picture was taken under windows 7 some months ago, as you can see, core temp rc3 displays a fluctuated core speed, and now core temp rc4 displays a fixed core speed.

old picture: http://i49.tinypic.com/ivzsya.jpg

new picture: http://i46.tinypic.com/1z3mffc.jpg

And as i said, in the old picture and in the new one, i'm using the SAME overclocking settings in the bios.As you see there is different core speed, so which should i trust ? 1.6ghz, 2.3ghz, 3.8ghz ??

I am sure the cpu is actually at 4.5ghz because in the first day i saved a picture with super pi, and now i got the same timings, so the cpu is at 4.5ghz
Edited by CalinTM - 11/6/12 at 3:38am
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post #14 of 16
Core Temp RC3 used to use a method similar to what RealTemp uses. This method is fully documented by Intel in their November 2008 Turbo White Paper.

http://download.intel.com/design/processor/applnots/320354.pdf

This monitoring method uses high performance timers within the CPU and can very accurately determine the multiplier at any point in time. This same method works on the previous Core 2 CPUs so tiny changes in the CPU multiplier can be detected. In RC4, it looks like Core Temp has decided to start rounding the multiplier data off so it is similar to CPU-Z 1.62.

RealTemp doesn't round anything off. It shows you the raw data exactly using the monitoring method recommended by Intel. CPU-Z before version 1.62 was not following this method. It used to assume that a lightly loaded CPU must be using the minimum 16 multiplier but that's not necessarily true. Many other monitoring programs decided to follow along and tell users the same thing because showing anything different than CPU-Z has always been assumed to be wrong.

RealTemp stopped following the CPU-Z method years ago. Following a method recommended by Intel seemed like a better idea. CPU-Z versions before 1.62 have brain washed users so they don't know what to believe anymore. They swear their CPU used to sit nicely at 1600 MHz when idle but that was often times just a big lie.

CPU-Z 1.62 is an improvement but it still appears to be rounding off the multiplier data and it ignores the multiplier changes when a CPU is rapidly entering and exiting various C States. I can understand this because the majority of users are not interested in exactly what their CPU is doing. For some, what their multiplier is really doing is probably "too much information".

If you want to know exactly what CPU multiplier your CPU is using then use RealTemp. Depending on what C States your CPU is using, the multiplier data can look a little chaotic or random but at least it tells you what's really going on using a monitoring method backed by the manufacturer.

Edit: Some motherboard software is probably based on the CPU-Z SDK so when CPU-Z changes its method, new motherboard software using the CPU-Z SDK will also start showing different results.

http://www.cpuid-pro.com/

Interesting to see that Asus uses the CPU-Z SDK. That's probably why AI Suite II shows the same 1600 MHz that the older versions of CPU-Z shows.
Edited by unclewebb - 11/6/12 at 10:03am
post #15 of 16
Thread Starter 
I've just OC-ed the cpu using the turbo method, instead of the standart multiplier method, and all power saving features work now.
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post #16 of 16

Is there a version of Real Temp that's newer than 3.70?  If so, then please provide a download link.

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250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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