*HP 2510p Owners Lounge*

[zerGus]

Hi Nando,

my understanding of the logic is the same as yours: a logical 1 (Vcc) is dominant. Connecting VID0, VID2 and VID 3 is interesting because it gives a good variety of available voltages within the VID range of 0.85 to 0.9v.

the pinout of the processor can be found on the Intel Datasheet, link to the (pinout identical) 45 nm version attached.
http://edc.intel.com/Link.aspx?id=1484

The relevant bit is on the attached table (careful! the BACK of the motherboard is a mirror image of the table). VID0 through VID3 are all nicely adjacent to each other...

I've started testing and have a couple of impressions:
- At 10x and 0.875v I have no stability issues. At 10x and 0.8625v I get an immediate BSOD, a good sign that the CPU is probably actually getting 0.7125v instead of the 0.8625v requested.
- At 6x / 7x and 0.8625v (0.7125v actual) I have no stability issues running 2 instances of CPU burn for about an hour.

The CPU temperature drops down to about 51C at idle. Room temperature is currently 27C here (South of France).

My next step is to do some power consumption testing under load and at various VIDs to see if the power saving is actually worth it.

[Borh]

Hello
I have a question about batteries for the 2510p
I found 2 different references for the 9 cells batteries :
- BJ803AA
- BJ803UT
Do you know the difference ? Which one is the best ?

[zerGus]

Some more tests for VIDs 0.875v and 0.8625v.

At idle there is only about 0.1W - 0.2W difference between the two.

Prime95 shows a bigger difference between the two. Under 100% load at 800MHz I see a battery draw of 13.5W at 0.8625v and ca. 0.7W more at 0.875v.

This does not look right. I did some power calculations and a think that I might only be down to 0.8125v and not 0.7125v as previously assumed. Maybe the connection between VID2 and VID3 is bad...

[nando4]

Originally Posted by Borh

Hello
I have a question about batteries for the 2510p
I found 2 different references for the 9 cells batteries :
- BJ803AA
- BJ803UT
Do you know the difference ? Which one is the best ?

The best 9-cell is the 2540P 93Whr unit giving an extra 12% of battery life over the 2510P/2530P 83Whr unit. It appears to be a direct retrofit. Please report your results if do go with the 2540P battery.

[Borh]

thank you. Do you know which one is the 2540p battery ? The BJ803UT ?

[nando4]

Originally Posted by Borh

thank you. Do you know which one is the 2540p battery ? The BJ803UT ?

UPDATE: appears here that BJ803UT is probably 93Whr and BJ803AA is 83Whr.

2540P 93Whr 9-cell battery part number, original 2510P/2530P 9-cell is 83Whr

The BJ803UT has no details on it's Whr specification other than saying it's a 2533T/2510P//2530P/2540P battery. Means it could be the 83Whr unit. Would need HP to confirm it's specifications.

I checked the 2540P Maintenance and Service Guide finding the 93Whr 9-cell spare part number is 593587-001. partsurfer.hp.com snippet below shows they want a hefty US$150 for it.



There's another place that sells it for a more reasonable US$102 or US$105.

[Borh]

thank you again Nando. I've ordered the battery. I will tell you if it works. And if you want me to run some test, just tell me. However I won't be able to compare it with the old 9cells battery since I don't have it.

I will try the modded bios when I have a SSD with a new Windows 7 installation.

[Borh]

Originally Posted by nando4

The best 9-cell is the 2540P 93Whr unit giving an extra 12% of battery life over the 2510P/2530P 83Whr unit. It appears to be a direct retrofit. Please report your results if do go with the 2540P battery.

I have received the battery. It works fine.

[nando4]

Originally Posted by Borh

I have received the battery. It works fine.

Any comments on battery life improvements observed?

[Borh]

Originally Posted by nando4

Any comments on battery life improvements observed?

Difficult to say. I had only a 3 cell battery and a 6 cell battery so yes the battery life is now far better. But I can't compare to the old 9cell battery since I don't have one.