Okay well I did a quick test with my T500 docked w/MSI Radeon HD 6570 (
click here for specs) using the same PerformanceTest Version 7 that Medessec used for his results. I also am in school (full-time) and have a job as well so both keep me very busy! I only have preliminary results at present however I will continue to come back and add to my post in the future as I collect more results. BTW my system specs for the T500 are in blue font.
* asterisk indicates the Lenovo Power Manager settings
T500- W7 64-bit, Intel C2D P9500, Intel/ATI HD 3650 switchable graphics, 4gb DDR3 RAM, X-25m 160gb SSD (Main drive; OS), Samsung Spinpoint 500gb (Ultrabay Hard Drive; misc. files)
T500 using Radeon HD6570 through 2503 Dock
- CPU: 1729.8, 2D: 461.7, 3D: 352.3
T500- docked w/HD 6570/Driver from MSI site
- *Adaptive- Balance all parameters- aero off- PCIE moderate power setting*
- CPU: 1753.4, 2D: 457.2, 3D: 335.9
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- Highest- Balance all parameters- aero off- PCIE moderate power setting
- CPU: 1768.4, 2D: 460.0, 3D: 174.4
- Adaptive- Balance all parameters- aero on- PCIE moderate power setting
- CPU: 1731.0, 2D: 157.6, 3D: 321.8
- Highest- Balance all parameters- aero on- PCIE moderate power setting
- CPU: 1742.5, 2D: 160.7, 3D: 179.2
T500- docked w/HD 6570/Driver from MSI site
- Low- Balance all parameters- aero on- link power state on moderate
CPU: 551.9, 2D: 76.9, 3D: 329.3
Low- Balance all parameters- aero off- link power state on moderate
CPU: 565.9, 2D: 157.8, 3D: 343.3
Low- Balance all parameters- aero off- link power state off
CPU: 569.7, 2D: 158.4, 3D: 341.9
Low- Balance all parameters- aero on- link power state off
CPU: 552.0, 2D: 77.0, 3D: 340.7
T500 -undocked/ATI 3650
- Adaptive- Balance all parameters- aero on- PCIE moderate power setting
- CPU: 1725.6, 2D: 251.0, 3D: 272.3
- Highest- Balance all parameters- aero on- PCIE moderate power setting
- CPU: 1738.7, 2D: 262.1, 3D: 270.2
- Adaptive- Balance all parameters- aero off- PCIE moderate power setting
- CPU: 1747, 2D: 464.1, 3D: 287.4
- Highest- Balance all parameters- aero off- PCIE moderate power setting
- CPU: 1759.4, 2D: 465.5, 3D: 279.9
T500 using Intel X4500MHD (integrated graphics)- no dock
- CPU: 1735.9, 2D: 309.3, 3D: 185.3
T500- undocked / Intel 4500MHD**
- Adaptive- Balance all parameters- aero on- PCIE moderate power setting
- CPU: 1730.3, 2D: 273.5, 3D: 185.2
- Highest- Balance all parameters- aero on- PCIE moderate power setting
- CPU: 1738.4, 2D: 273, 3D: 182.3
- Adaptive- Balance all parameters- aero off- PCIE moderate power setting
- CPU: 1751, 2D: 459.2, 3D: 199
- Highest- Balance all parameters- aero off- PCIE moderate power setting
- CPU: 1771, 2D: 468.1, 3D: 199.6
** The Intel graphics could not perform the 4X anti-alias test for the graphics test; not sure how Performance Test 7 adjusts for the score; the numbers are most likely inflated as Medessec’s NVS140m should clearly score higher than the Intel 4500MHD. I will post the scores of another Intel 4500MHD device, my X200tablet, as a control with similar Lenovo Power Manager settings as well.
X200tablet –W7-64 bit, L9400 C2D 1.86GHz, 4GB DDR3 RAM, Intel X-25M 80GB SSD
- Adaptive-Balance all parameters- aero on
- CPU: 1284.2, 2D: 218.5, 3D: 185.1
- Highest- balance all parameters- aero on
- CPU: 1295.4, 2D: 214.2, 3D: 185.3
- Adaptive- Balance all parameters- aero off
- CPU: 1310.3, 2D: 375.7, 3D: 198.8
- Highest- Balance all parameters- aero off
- CPU: 1313.9, 2D: 376.9, 3D: 198.8
MSI HD 6570 video out ports
- HDMI with Audio is functional
Preliminary Conclusions
Power may be a factor here. If you take a look at the scores for 'T500- docked w/HD 6570/Driver from MSI site' testing category then notice how when I have Lenovo Power Manager set the CPU speed to 'Highest' followed by 'Adaptive' that there is a difference in 3D scores. Also to further that hypothesis I included a test which basically restricts the CPU speed to 'Low.' I think the CPU frequency is set to below 1 GHz in that setting IIRC. Notice how the graphics scores are still 300+ while the CPU drops to ~500. In contrast when I have Lenovo Power Manager set to 'Highest' the 3D graphics are halved from 'adaptive' and 'low' settings. It seems that allowing the CPU to draw enough power to run at 'Highest' affects the scores of the 3D test results. That seems to indicate (quite saliently) that the balance between power and performance is extremely inversely proportional with this set-up. More CPU draw power results in less 3D performance. Less CPU drawing power results in greater 3D performance. The 2D performance I gather is CPU dependent so it is not too surprising that the 2D remains well above the 3D in 'Highest' power manager settings. I am not too familiar with how much the Power Manager restricts CPU frequencies so if anyone wants to comment about that please do.
The Intel graphics all seemed to produce the same score (minus the 4X anti-alias test). I expected that and I also expected the results to be higher when the power manager is set to 'Highest' as well however it appears that there is not a significant difference between 'Adaptive' and 'Highest' for the Intel gfx tests. Also having Aero either on or off seems to make a difference in my testing also. I am still convinced that if one has an Intel graphics-only T500/T61/T60/etc then there is a benefit with using a dock+video card which is noticeable if comparing the results of the Intel graphics with those from the HD 6570. The scores between the HD 3650 and HD 6570 may seem close however subjectively I am able to see a difference in performance.
I think I may have run into the 2gb limit when docked+using a gfx card in the 2503. There have been a number of times I got a series of endless cycle of reboots upon starting the T500 while docked. At some point fiddling with the 'Display' settings in BIOS seemed to remedy this. I am not sure what my settings are but after messing with them my T500 will finally start. I have not taken out 2gb to test yet. Too busy with preparing for finals and work (terrible during finals but bills need to be paid). I will mess around with the settings at some point in the future and note which setting works without the reboot-cycle.
Finally if I made an obvious typos it may be because my circadian rhythm is FUBAR at this point lol. I need food also right now so I am going to get ready to go out and get some. Need brain food!
Have been using the dock w/HD6570 on-and-off. I have a small break before I become busy with a summer internship so I decided to visit the family and squeeze in a little tech work as well. So my deal with the advanced dock 2503 thus far is that it is
terribly noisy. I am sitting here in a somewhat silent environment yet the fan of the PSU is whirring away quite noisily. I wish Lenovo had paid more attention to the Advanced Dock 2503! The air that is coming out the back is cool and yet it sounds like it is at full-speed

The dock had more potential (revision with some enhancements might have been good) however at the trajectory that Lenovo has been going on
the dock is what it is- ingenious yet half-done right IMO. PCI x16 would be great! A beefier and less hypochondriacal power supply would also be welcome by me for sure! Also if anyone knows of a software or hardware solution to control the fan speed of the PSU turbine I am sure all who use the dock will be eternally grateful as well

Still I was able to take the dock and put it to work with the kids at my parents place and they got to play some games with it- Bioshock Infinite, Tomb Raider (most recent version), Skyrim, and Resident Evil 5 for hours. Sheesh the kids must have sat there almost all day Saturday until I chased them off of the T500! I also got to work on assembling a T60 for my sis as an upgrade from an R52 she has had for 3 years. I installed Linux Mint on her R52 and is now a back-up lappy for her. I also wanted to put an Intel 6200 in my nephews X61s however it was not letting me install drivers for it. I will have to make a second attempt in August before my classes pick up again. I did want to test the dock with the T60 however I ran out of time and was back in uni town again after the 3-day visit at my parents. My reason is that as shown in one of my tests with the T500 with the CPU set at 'Low' the graphics still were running quite well. I figure that the T60 w/integrated graphics would run the same games just as well if docked. IOW the graphics card is very independent when it comes to constructing graphics and can do quite well even if the CPU is not the best. There are more variables to consider for sure! Hope the information has been helpful!
Future Considerations:
Test with aero off or on, Lenovo Power Management settings for Performance and Adaptive profiles, try 2gb of RAM versus 4gb RAM,
test the X4500MHD and ATI HD 3650 GPU systems of the T500 (NOTE: will have to figure out how to streamline operation of switching from between all GPU somehow; 3 different GPU drivers does cause some issues).