How to Enable Intel Dynamic Acceleration (IDA) on Both Cores of a Core 2 Duo

Here's the beauty of Dual IDA mode.

http://img837.imageshack.us/img837/9070/c3example.png

At idle, 45nm CPUs are designed to go into the low power C3/C4 sleep state regardless of how you have ThrottleStop or RM Clock set up. In the above example, both cores on my T8100 are locked to the IDA multiplier of 11.5 but my CPU is still spending 98% of its idle time in the C3/C4 sleep state. Because of this, Dual IDA mode has virtually zero negative impact on power consumption at idle. The VID used by these CPUs in C3/C4 is lower than what you can set in ThrottleStop or RM Clock. Any time your CPU is allowed to go into Dual IDA mode, it gets its job done quicker which allows it to spend a bigger percentage of time in the low VID C3/C4 sleep state. A faster CPU is not a bad thing. Dual IDA mode improves performance and efficiency and should not drain your battery any quicker than when you are not using Dual IDA.

If you don't like the Task Scheduler method then why not just drag a link to ThrottleStop into your Startup folder. Adding stuff to the registry startup section doesn't work when using UAC so I avoid doing that.

Here's the Task Scheduler method for those that use UAC.

Task Scheduler Method

Edit: The Windows Performance Monitor lets you chart battery power consumption. That might be useful for battery testing purposes too.

 

Does the vertical axis on the graph represent CPU usage, or its 'state' percentage as in the 100% min processor state we dial in using the Windows Power management?

My graph choppy and on the totally opposite end of the scale. I took the screen shot after just sitting and staring at the computer for a while. There are normal processes running in the background plus wifi, Opera and Skype but I'm not browsing or talking to anyone.



I've disabled UAC so I'm happy to get this started up with the registry but I'll use the task manager until I figure out otherwise. Thank you for the link.

 

Add %C3 time to the processor monitor rather than %Processor time. Then you'll see the CPU going into the low power mode which based on your low %Processor time should be quite often.

 

This is a handy tool to see what your CPU is really up to when it is idle.

Highlight the %Processor Time and then click on the Delete button. After that go up to the top and click on the green + plus icon and go to the Processor tab and then select %C1 Time, %C2 Time, %C3 Time.

The image above is of my QX9650. I don't think this older motherboard supports some of the deeper sleep states so it spends the majority of its idle time in the C1 state regardless of how ThrottleStop is set up. Some of the buttons in ThrottleStop only work on the previous 65nm CPUs.

 

Where can I get this tool?

 

That screen shot I posted is from Vista but it is also included as part of Windows 7. I'm not sure if there is something similar in XP.

For Vista or Windows 7, just click on the Windows logo at the lower left of the screen and type in Performance Monitor and Windows should be able to find it on your computer. It gives you a whole whack of different things you can monitor and puts and end to some of the myths.

Edit: Here's the Microsoft docs. It doesn't look like Performance Monitor is available in XP.

http://technet.microsoft.com/en-us/library/cc749249.aspx

 

"perfmon" does it with Windows 7. Thank you for the link.

 

Ah, that looks a lot better. But what accounts for the difference in readings of my computer vs. unclewebb's? I never knew there were such things as C states so I'm learning as I go.

 

I'm a nut when it comes to inefficient software running on my computer. Use Task Manager to see if you can find any programs like that.

Here's an example of why Dual IDA works so well. The first example is while using RM Clock to lower the FID and VID. All this does is it makes the CPU slow and inefficient so it spends less time in the low power C3 state.



Now compare that to turning off RM Clock and using ThrottleStop with Dual IDA mode enabled. Now you have both a faster CPU and a more efficient CPU so it is able to spend a bigger percentage of time in the lowest power C3 state. Dual IDA is a win win situation.



Leaving ThrottleStop minimized in the system tray also improves efficiency.

 

I completely agree. I hate having unnecessary apps or running processes. The point of a computer is efficiency!

When I close the wifi connection and internet browser, my numbers shift up to the 100% area. I'm very pleased with Throttlestop, a great piece of software and I'm officially done with RMClock.

Is there anything at all Throttlestop can do to an i-Core processor? Even if it can't recognize the FID multipliers, can the program at least be set to allow less and less voltage until it BSOD's, thus being a very crude undervolt?

And to answer your question in one of your PM's about using .95v on the 9.5 IDA, everything is stable. I've tested with Orthos and wPrime, no problems, plus about 6 hours (2 and then 4) of h.264 video encoding.

 

ThrottleStop can correctly read the FID / multipliers on the Core i CPUs but there is not yet any documented way to change the voltage on these newer CPUs. Intel removed the VID information from the CPU register that used to contain VID info in the Core 2 design.

ThrottleStop can do some magic when used on the newer Core i Extreme mobile CPUs like the 920XM and 940XM. It is the only tool that lets you adjust both the turbo multipliers as well as the turbo TDP/TDC settings in these CPUs. When world records are being set with Core i Extreme mobile CPUs, ThrottleStop is usually hiding in the system tray. Just ask the M17x owners on NBR. They are happy users of TS.

The Core 2 P series seem to be able to run reliably with less core voltage compared to my similar T8100. Orthos and wPrime stable at 0.95 volts is excellent. Thanks for posting your results. Once you do some testing and learn how the Core 2 45nm CPUs work at idle, the way ThrottleStop works compared to how RM Clock works, starts to make sense.

 

First off, I want to thank you unclewebb for your hard work and time on throttlestop, it's a wonderful program. I installed it and ran it on a Dell vostro 1500 and it worked like a charm

After that I tried it on my HP dv6 1360us which has an intel core duo2 p7450 in it. Whenever I started up TS, the turbo box would be checked and I am unable to uncheck it. I went into my bios and disabled C6 states but thats pretty much the only option I have as far as speedstep. I also read the link with the modified HP bios. Would this work on my laptop? Thanks guys

 

The P7450 does not support Intel Dynamic Acceleration (turbo boost).

SLB54 (Intel Core 2 Duo Mobile P7450)

That's why the Disable Turbo box in ThrottleStop is checked and you can't uncheck it. Turbo mode is permanently disabled in this CPU so there's no use in trying a new bios if the CPU doesn't have this feature available.

 

Well I am loving Throttlestop, I don't at all miss RMClock. My only thing is that I need to figure out a way to have it resume after the computer comes out of sleep. Would setting Task Manager to trigger Throttlestop at startup rather than logon solve this?

 

Can you be really specific about exactly what problem you are having?

I'm using Dual IDA mode on my Latitude D830. With ThrottleStop minimized to the system tray, when I go into hibernate mode and then come out of hibernate mode, Dual IDA mode automatically resumes. Same thing when I go from the desktop into standby mode. ThrottleStop automatically resumes Dual IDA mode.

There is one problem that I know about that is on the things to do list. If my laptop goes into standby mode while on battery power, it will resume after a couple of hours and then immediately go into hibernate mode on its own to save the battery from draining. When this happens, it won't properly resume and go into Dual IDA mode. Is this the problem you are having?

If you are having a slightly different issue then just explain it to me as best as you can and I'll try to come up with a fix.

 

Actually, I'm not having any problem now. Everything is working fine, comp comes out of sleep and TS is still there.

 

Yes indeed The happiest throttlestop user. It helps most of my laptops especially the m17x

 

Strange thing, when I disable speedstep in my BIOS, EIST is still enabled in throttlestop.

 

A symptom of your bios locking the EIST bit. Would need a bios hack to unlock dualIDA.

 

Probably like a lot of BIOSes out there. When you disable EIST instead of disabling the EIST bit the BIOS reports zero performance states to the OS which is effectively the same thing as the OS/Windows doesn't know of any other performance states to switch to and therefore just uses the one state that was handed over by the BIOS.

 

The EIST option in my bios on a desktop motherboard is completely ignored. Whether it is enabled or disabled in the bios doesn't make any difference. Having EIST disabled can result in the motherboard booting up at the lowest 6.0 multiplier and being stuck there. The easiest way to prevent that from happening is to ignore a user's request to disable EIST. The Dell laptops that I have seen respect a user's EIST request but many motherboards either don't have an option for this or if they do have an option, it's a dummy option that doesn't actually do anything. ThrottleStop reads this info directly from the CPU so if it tells you that EIST is still enabled and locked, then EIST is enabled and locked.

 

I have a Lenovo T400 with P8400, I disabled speed in BIOS...but when I run the program EIST is shaded out, however it is unchecked...will that be okay?

 

EIST is locked. Only Dell/Alienware notebooks have it unlocked as shown by the successful TS dual-IDA implementations here. You could try to hack the bios to unlock EIST or just use TS to run single-IDA mode.

 

thanks for your response

that's too bad :/

 

My Dell 1735 is MUCH faster now. UncleWeb ThrottleStop increased my passmarks from 406 to 963 (something wonky there). I was able to undervolt the CPU to 1.1750. That plus overclocking the GPUTool_CTP1 to 565mhz and 530mhz has let me play SC2 with no stuttering or pausing (at least on the low settings @1024x768) with vertical-synch enabled even with my 3650 radeon graphics. You just saved me $1200-1600. THANKS!

 

Could someone explaint it to me in simple steps what exactly I have to do? I didn't really understood from unclewebb's instructions .
I have a XPS M1330 with T7500 @2.2Ghz
thanks!

 

dual-IDA has been successfully implemented on a M1330+T7500 here.

To run dual-IDA download Throttlestop, run it, right click on empty panel space select "Start Dual IDA". That will get you a T7500-2.4 with a M1330.

If want more overclocking, could do a 200->266Mhz M1330 PLL pinmod which could theoretically take you up to 3.2Ghz with the dual-IDA overclock.

 

So... this is what I have done:
1. start Throttlestop
2. multiplier was set to 12 anyway
3. pressed Turn On
4.checked EIST
5.unchecked EIST

Voltage is @ 1.2625

it now shows 12x200= 2400Mhz

Are the steps I have done correct?
Thanks!

 

Before you do step 5), set the VID voltage first. You can probably lower the core voltage of your T7500 quite a bit while still maintaining 100% stability. You'll need to do some wPrme or Prime95 testing to see how low you can go before you run into errors. If you are running at 2400 MHz and EIST is disabled then it sounds like you have discovered Dual IDA mode. It's only a 9% performance boost on your CPU but that's better than nothing. You can do it manually by toggling the EIST box or if you right click on an open space in ThrottleStop then you can select a menu item that does this for you automatically.

I thought the instructions in the first post were fairly obvious and simple to follow. Let me know what part of it you don't understand so I can get that fixed up and make it easier for others.

Edit: I'll get that first post fixed up someday soon with screen shots from the latest version which shows the new menu option to start Dual IDA.

 

thanks for your reply unclewebb... I think your instructions are quite simple now.. .guess the whole principle was not clear to me.What exactly IDA does etc.
Could be also because of my english .
thanks again

 

There's always room for improvement in the docs. I didn't realize that the first post didn't include the latest version so it could use some updating. Once you play around with toggling EIST on and off, this Dual IDA (Intel Dynamic Acceleration) starts to make a lot more sense.

 

The EIST option is grayed out and there is no option to turn off intel speed step in the BIOS (ASUS g50vt-x1, P8400), I guess no dual IDA for me

Still I must say this is a great tool, way better than other undervolting softwares like RMclock/crystal CPUID. I am currently using throttlestop to undervolt my P8400 while overclocking it to 2.5Ghz since it can recognize half multipliers unlike RMclock. Here comes a question I have: The max multiplier for P8400 is 8.5, but I found it jumps to 9 occasionally, does that mean I can safely set the highest multiplier to 9 in throttlestop? There is an option to set the multiplier. Also I have heard it's generally no recommended to overclock and undervolt at the same time, is it really that bad? I really need to squeeze some extra juice out of the mediocre P8400. Thanks you!!

 

With ThrottleStop, set the multiplier as high as it will let you and set the VID voltage to as much as you need for your P8400 to be stable.

The default multiplier for a P8400 is 8.5 but the Intel Dynamic Acceleration (IDA) multiplier is 9.0. By setting ThrottleStop to 9.0, you are telling the CPU to use IDA mode and the 9.0 multiplier as much as possible. Whenever one core is active and the other core is asleep, it will automatically use the 9.0 multiplier when set up like this. As soon as both cores are active, they will both be limited to the 8.5 multiplier. During normal use, this switching back and forth is happening hundreds of times a second. That's why ThrottleStop reports the average multiplier in the FID column. Most software botches the reporting of these CPUs, including those nice graphs in RM Clock.

There's no need to worry about old tales about overclocking and setting the voltage. No matter what speed you are running at, you only need to use as much voltage as is necessary so that your CPU runs 100% stable. The P series work great and were designed by Intel to run reliably at a low voltage.

Here's a nice test I did that proves that a high FID/VID at idle is not a bad thing.

http://forum.notebookreview.com/6369641-post5060.html

There's a lot of old tales that used to apply to the older Intel CPUs but don't apply to the newer 45nm Core 2 CPUs like your P8400.

 

Thank you for your reply! This may sound a bit absurd, but is there any real benefit by setting the max multiplier to 9? I mean in intensive usage, both cores will be limited to a highest multiplier of 8.5 anyway. The multiplier 9 will only come into play when one core is inactive, which should only happens in scenarios like browsing/word processing, etc. Is there any benchmark out there proves that setting the highest multiplier to the IDA multiplier increases performances? Thanks again!!

 

I got a 0.2pt increase in Win7 WEI CPU/memory scores with single-IDA mode here 2510P.

Any single-threaded app will use IDA mode to increase performance by that slight margin. If can hack the bios then could get dual-IDA which would show an increase in benchmark scores across the board. THough why go to all that effort? You'd get better results by doing a PLL overclock as is shown in the G50VT overclocking thread.

 

Thank you, Nando. I have always been overclocking with SETFSB, just want to push the CPU a bit harder, anyway, I will try to set the max multiplier to 9 with the combined SETFSB overclocking and see if it could make a difference.

 

Processors with a 200 MHz bus speed usually increase the multiplier by 1.0 when using IDA mode so there is more to gain with them. A P8400 only increases the multiplier by 0.5 and only when lightly loaded so I agree that there isn't as much to be gained from this.

I'm not sure why Intel wasted their time creating this feature when the increase in performance is so minimal. It was likely the marketing department in charge of this. Intel Dynamic Acceleration and Turbo Boost sounds impressive. At least on the newer Core i CPUs you get a lot bigger percent increase in performance. A Core i7-720QM can turbo boost the multiplier from 12 to 21 for a 75% increase in CPU speed. That's more like it.

To test performance maybe try running a Super PI mod benchmark with ThrottleStop set to the 9.0 multiplier vs with TS set to the 8.5 multiplier with Disable Turbo checked.

On a T8100 that increases the multi by 1.0, single IDA mode gave me a 2.37% improvement in my SuperPI times. A P8400 is likely to show half that increase. It would have made a lot more sense for Intel to save their development money on this project and just gave users a tiny bus speed increase say from 266 MHz to 270 MHz. I guess they were just practicing up for Core i where turbo boost is more useful.

Here are my best SuperPI 1M times on my T8100:

Diable Turbo: 24.554
IDA: 23.985
Dual IDA: 22.546

Maybe Intel should have called me up and I could have taught them about Dual IDA mode. You get a little more bang for the buck with that compared to single IDA mode.

Edit: Here's a wPrime example with both cores fully loaded. Dual IDA gives a nice boost in this test but regular IDA won't give you any advantage because for this test, both cores are fully loaded and by the Intel design, IDA mode is not used then.

 

Sadly, the BIOS of the laptop doesn't have an option to turn off EIST Dual IDA sounds like a fine boost of performance at the cost of nothing, well, maybe a tiny extra bit of heat.

I tried 9 as the highest multiplier and it turned out the voltages that worked before for my overclocking(2.5Ghz, 1.075V) can't provide enough power for the new multiplier, I gotta up the voltages to support it, so I give it up. The minimal performance increase will only happen in light usages, in which case even the lowest dual core will suffice. It's not worth it in my case. Too bad.

 

I found a road to turn off EIST on Windows, but i can't still use on my P8400 Multiplier 9.0 Stuck on 8.5

http://img89.imageshack.us/img89/2386/stucks.jpg

U can try http://forum.notebookreview.com/har.../525272-guide-turn-off-eist-without-bios.html

 

Unclewebb can you make su7300 happy also I am a m11x r1 owner with C2D su7300. Thabks in advance

 

Anyone could confirm does his method to turn off EIST work? I am kinda tempted to try but don't wanna screw up system files.

 

Try this, its save no risky. U can return every time to EIST ON

edit: unclewebb so i don't have chance to set multiplier 9.0 ? Maybe i can use your MSR Tool to hack i dont know :<

 

If the bios locks the EIST bit then there is nothing that software can do. When you try to change the EIST bit with the MSR Tool, that change will be ignored.

PHYSXftw: You have both cores locked at the default multiplier of 8.5. What good is that? You found a way to disable Intel Dynamic Acceleration so now your CPU runs slower. That's not a very good fix.

Your screen shot of ThrottleStop shows that the EIST bit is still set, look at the check mark, and this bit remains locked so it can't be changed from within Windows.

Cpt.Zero: There's nothing I can do with a SU7300. My recent M17x R2 trick doesn't work on the Core 2 Duo based CPUs.

 

Hack your bios, examples here to unlock the EIST bit. Hardly worth it for your x8.5 -> x9 improvement.

SU7300 doesn't have IDA capability, so dualIDA mode can never run on it. The mx11xR1 already does a factory overclock from 1.3->1.73Ghz. Asus UL80VT owners with PLL overclock abilities could the SU7300 up to 1.9Ghz. So your pretty much at your limits already.

If need more speed consider a system upgrade.

 

Hi,

After almost 2 hours of google/forums search, i'm still looking about the possibility to disable EIST and enable IDA for my q9000 on my m17x-R1 (BIOS A05). It's greyed in TS and i didn't find any bios mod, or even people who solutionned this problem so... Any answers guys ?

---

Alienware m17x-R1 - [email protected]@1.05V - Crossfire de 4870@600,[email protected] - 4go DDR3 1066@1218mhz 888-23 - 1x500go 7200 RPM + 1x320go 5400 RPM - 17" WUXGA / 32" LG 32LD750 - Windows 7 Pro 64

 

Wish this worked on Asus laptops, I've managed a P7350(2ghz) to run at 2.6Ghz at only 1.0875V, obviously what's limiting me to get more is the FSB.

 

Q9000 now locked at 2.266ghz

 

Meaker: Can you post a ThrottleStop screen shot while running 4 threads of Prime95 or a similar load? Just a few seconds at full load would be great. I haven't seen any examples of Dual IDA on a Quad posted that I can remember. Might have to rename this trick Quad IDA for these.

 

Do you know what's awesome? That I only reach 70C with prime95 blend because of the 1.05V, also it has extended my battery life



I should mention that thanks goes to the pheonix bios modding team so that I could dissable EIST in my 7738G's bios.

 

I just noticed how confused Core-temp is lol.