Merom on my e1705 lives. - Page 5

I am sure you have the speed step option enabled for your cpu (which will run your cpu at a 6x multi (1.0ghz) unless more is needed.

You can use RightMark to control how you want your system to run (both on AC and Battery)

I prefer (and the program suggests) to run your laptop on Performance On Demand setting for both AC and Battery
I can watch my CPU speed change dynamically (in the taskbar) depending on what I am doing (how much CPU power my system needs.

Here is a quick run down on what you can do for you laptop with cpu rightmark (voltages are shown using my B0 stepping T7400 ES)

1) Download 2 Copies of Prime95 and extract them to seperate folders
2) Run Both instances of Prime95 and choose the option for torture test -- max CPU and Power usage
3) While both instances of Prime95 are running open up RightMark and click the plus sign next to Profiles
4) Place a check mark in Index 0-7 (FID's 6x-13x)
5) Change the 6x FID to its lowest Voltage setting (1.062V)
6) Change 13X to its default (1.238V)
7) Go thru the Proflles (Power Saving, Max Performance and Performance on demand) and put a check mark on the "Use P-States Transitions and then a check on the Index's you want to use (0-7).
Here is an example of mine... on Power saving for both AC and Battery.. I just have index 0 checked (FID 6x) as if I am saving power, I want the lowest voltage being used... and on Max Performace (both AC and Battery I have 13X checked and on performaced on demand I have FID6x-13x checked as it will dynamically change multi's depending on the power I need for the tasks I am running at that time).
8) Now go back to the Profiles box and it is time to start lowereing the max voltage to it's lowest stable state. (as both instances of prime 95 are still running and should still be stable and your system should be heating up pretty good by now).
9) Since you set the 6x FID to 1.062v and the 13x Fid to 1.238v and also checked the Auto Adjust Intermediate VID's box... all voltages should be filled in
10) While both Prime95's are still running, change the 13x VID down a step and make sure one (or both) of the prime 95's dont give an error and stop.
11) If all seems good and P95 did not give an error, then lower the 13x Vid down another notch... .keep doing this (and giving a little time in-between) until an instance of Prime 95 stops.
12) Once you hit that voltage.. you know that you went to far... so up that voltage by the next step and restart the instance of P95 that just quit and then let it run for quite a while ( I usually go for ~5hours) to make sure all is stable.
If you get any errors, then you will need to up the voltage up a step again and restart the stopped P95 and let it run until you go ~5hours with no errors.
At this point you have found the lowest stable voltage for your system (at max usage) and thus (as you checked the auto-adjust intermediate VID's check box and filled in the lowest voltage you can for the 6x voltage) all the FID's from 6-13 will be filled in with a voltage ranging from 1.062v to the voltage you just determined.

Ok... this turned out not as quick as I ment to.. .but hopefully this will help you (and others) with finding your lowest Max Voltage (and thus lowering your overall power usage and conserve your battery and system life by that little extra).

I used Rightmark on my 1.66GHZ Yonah and I can't seem to make it stay at 1.66. It only goes to 1.66 when it needs too, otherwise it stays at 1.00. Anyone know how to make it stay at 1.66?

I read on another site that someone had to get a new heatpipe cooler from Dell to keep the temps on his merom usable. Are you using the same assembly you had on the t2400 ?

Thx,
Randy

Arctic Silver 5 vs Dell Factory Heat Pad on Thermal Assembly

Hi EVeryone;

Has anyone done a before and after thermal comparsion on a T7400 or T7200 cpu on a Dell E1705 between the the Dell Factory Heat Pad on the Thermal Assembly and Arctic Sliver 5?

thx-1138

PS Please post.

I am going to replace my Duo Core with a T7200.
Should I use a heatpad or go with paste?

I don't know which is better, worst or no difference. However, if you don't use Arctic silver you need to order a new cpu thermal assembly from Dell's parts department as retail box, oem, and es chips don't come with any type of thermal protection. The thermal assemly has the pad on it, and is about $10 or $!5.00 US. If you need the part number I'll have to look it up for you as I have it some where. Dell's parts department is clueless they only want to know the part number and don't know the difference between a wifi card and a optical drive.

thx-1138

So if I use artic silver I just simply apply the paste and make sure the residue from the orginal heat pad is gone?

Decent quality thermal paste e.g. arctic silver is far superior to the heat pads. So you want to remove all of the heat pad residue and connect the metal heatsink directly to the processor shell. Use a very thin layer of paste. The purpose of the paste is simply to fill microscopic voids & increase the surface contact that can transfer heat. Ideally, you'd also want to lap (sand with very fine abrasive) the cpu and heatsink. But this does run the danger of damaging your cpu.

WHOA! DO NOT try to lap/sand or otherwise smooth your CPU core! If you clean it off you will see it has the consistancy of glass... If you scratch this surface, you more than likely will do irreversible damage to your CPU, and you can be sure Dell won't be replacing it for you. Lapping is the procedure of smoothing or polishing a metal surface to a close to perfect flatness. You would do this on a heatsink assembly, but most certainly not on the silicone surface of your cpu die!

Why is my merom saying lowest 6 x 1.062volts & highest is 13 x 1.362 volts way higher than the 1.23volts i see in uclajd chip, is it because i'm using the B0 Engineering chip If you could supply this cpu thermal assembly part number that would be great. I just rang dell to see if heatpipe cooler from the old m1710's that came with a t2500 cpu are the new ones with the core 2 duo t7400 are the same . They said yes there the same. I presume this would be the same for e1705's Overrall my temps are OK idle 40/42 can't remember the temps for my old t2500 tho.

You need to do a few things. Update the bios to A04 (unless you already have A03) and update RMClock to the latest beta build (or NHC latest edition if you like that) Then, it should show you the correct voltages (as well as let you lower the overall voltages) My engineering T7400 B0 stepping has 0.95v for the lowest 6x and 1.112v for the highest 13x D.

Thanks Debaucher but i'm using a xps m1710 with A03 bios and yes i have the lastest rmclock but my enginerring chip t7400 is showing lowest 1.06 and highest 1.36. I personally feel this is a bit high but my temps are ok 40idle 65load

Are you using the beta rmclock? (go into the rmclock forums and there will be a link for it.... here you go for 2.2 release candidate 1)

Be sure to uninstall and remove all previous settings before using/installing this one.

LMK if this works!

D.

Ok thanks now it's showing 6 x 0.950 and 13 x 1.25v.

Yep, those are the default voltages for the T7400
Mine will run as low as 1.075v for 13x, but I keep it at 1.100v at 13x just to be safe.

D.

Hi guys, I'm getting a Latitude D620 with a T7200 Core 2 Duo tomorrow at work for testing with my company's app. I was thinking about dropping it into my I9400 with a Yonah T2600 to check how fast it is. My mainboard is also Rev 03 and I was going to upgrade to the new A04 BIOS before I pop in the chip. Any tips or advice anyone can offer before I do this?

Thanks for all the info on this forum. I successfully replaced the T2400 cpu with a T7200 cpu in my E1705. The stock Dell 533MHz DDR2 memory works fine with the T7200 and the A06 Bios