m15x Stealth Mode

Everyone seems to keep saying that the m15x's stealth mode downclocks both CPU and GPU. yet, in all my time in Riva tuner, toying with various settings, I've only ever seen the GPU be downclocked in stealth mode.

Riva tuner has a plugin to give you a real-time feed of the CPU Mhz as it changes. I've seen the CPU downclock when under extremely low load (5% or 10%) even to see my 2.5Ghz T9300 hit rock bottom around 400Mhz when nothing was happening.

But Stealth mode has never caused this. Can anyone confirm that stealth mode has any effect on CPU Clocks? or can someone else confirm what I've witnessed so many times?

maybe I'm special?

Edit: You can enable the Mhz monitoring in Rivatuner by selecting the Setup button (bottom right of hardware monitor) then the plugin button (bottom left of Setup window) and checking CPU.dll, hit OK, and new options for CPU0 and CPU1 clock.

 

I think Stealth Mode just for the Grapics card. If you look on your Power Options you might be able to setup your cpu to change cpu clock speed.

Also people are playing in Stealth mode.

 

I really love the stealth mode. It saves me from rebooting into intergrated graphics mode. I have a smart bay battery and can get about 3+ hours with stealth mode. yay Alienware!

 

mine DOES downclock the cpu when in stealth mode. Turn on stealth and then run a stress test on your cpu and you'll see it won't go as high as its suppose to.

 

Taco, my CPU almost never gets very hot at all. in fact, I don't think i've seen it over 80 deg. C...

again, looking at the raw Mhz, it seems to be going full speed even in stealth mode.

 

i posed some where a screen shot of my stealth mode (which i didnt know i was in after updating the bios) it screwed my cpu and gpu down so bad. Milc helped me out so i am now in good mode lol.

 

I remember your board... some of use like stealth mode and use it on occasion.

not that never using stealth mode is a bad thing, we just like saving power.

 

Stealth mode downclocks both GPU and CPU. I use RMclock for CPU speeds and once I switch stealth mode on, both clocks come down. GPU the same as yours, CPU goes to 800MHz.

 

See i'm the same as milcs. My cpu won't go over 800

 

My CPU downclocks to 1.5 GHz in stealth mode

 

If you want to play it safe, then you can also put the power settings on "Power saver" mode. It will definitely limit your CPU.

 

Now, I'm more confused than ever. After doing some digging, I tested my computer with CPU-Z, RMclock, and RivaTuner's CPU functions...

when my computer is not in stealth mode... everything seems fine.


RMclock - 2506.96Mhz
CPU-Z - 2516.4Mhz
RivaTuner - 2496.56Mhz

All three within 20Mhz of the 2.5Ghz my CPU is supposed to operate at.

However, turning on Stealth mode makes everything get confusing...


RMclock - 831.02Mhz
CPU-Z - 1595.7Mhz
RivaTuner - 2501.14Mhz

soooo... is my computer at 800Mhz? 1.6Ghz or the full 2.5?

I'M SO CONFUSED!

 

are you undervolting your cpu? If you are that could affect your results.

 

everything is stock. I havn't touched any settings.

I'm only running the programs to monitor the system, not to change it.

I have the X32 RC1 BIOS on the system.

 

ok I'll test and let you know.

 

I think Rivatuner is not good at measuring your CPU speeds. Regarding the other two... I don't really know. I've tested mine with RMclock only. I will try and check it when I get mine back from repairs.

 

Thanks Taco.

@milcs: I think you're right regarding RivaTuner... Though, It does reflect the downclocking when idle (which I believe the CPUs do actually do) where the other programs don't.

regardless, I'd like to find a program that accurately shows what's really going on with the CPU

 

ok after doing some test this is my conclusion what stealth mode does for your cpu is not allow it to go past our x8.0 multiplier as i'm looking in cpu-z it has mine downclocked to 1596 MHz rmclock is showing it as 798 and thats probably because it showing the 2 cores separately maybe its getting confused with the stealth mode but you take 798 x 798 = 1596. In my opinion we are running with the x8 multiplier and running around 1.6GHz

Edit: Also it seems that stealth mode doesn't use speed step cause its staying at x8

 

Taco is brilliant! RMClock measures speeds and temps of cores independently. That's why... Rivatuner is just bad for CPU!
Cheers for clarifying that old Taco mate!

 

yea, good job Taco. It makes sense. Here's some rep

 

both RMclock and CPU-Z are listing an 8x mult. however only CPU-Z is listing the system bus speed (of ~200Mhz), according to the simple rules of multipliers (from back in the day up to about pentium) 200mhz x 8 is 1.6Ghz.

So it can be argued that RMclock is merely confused and the system bus is in fact 200mhz with an 8x multiplier for the CPU, giving 1.6Ghz of system performance.

This makes sense, as my CPU has a maximum multiplier of 12.5x (system clock of 200mhz x 12.5 = 2.5Ghz). I really just think RMclock is wack from the new CPUs. though it shows the core as Penryn, I was looking over the website before I downloaded the program, and the CPUs supported, didn't list the C2D Penryn. I had to go into the program and manually select that I was using a Mobile CPU for it to register as Penryn (I think it said Wolfdale before... not 100%). also, the RMclock util has settings to optimize CPU cache (though I havn't used these, I've seen them), but nowhere does it have an option for the 6Mb L2 Cache of the 45nm cores.

In conclusion, I simply think RMclock is reading the CPU wrong, and CPU-Z is correct.

Anyone who wants to debate over these points, please speak up, I want to hear other opinions/viewpoints.

 

I agree with you 100% it seems rmclock is getting confused. When I run mine normal speed it reads the cpu speed correctly but when I put into stealth it gets very confused so I'm there with you.

 

Just looking at this though, I'm running Prime95 to tax the CPU, and the per-iteration timing goes from .048 seconds (with stealth off) to .156 seconds (in stealth) which is aproximately 3x as long.

2.5Ghz /3 = ~.8Ghz or 800Mhz.

I wish there was an easy answer to all this.