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I have a Thinkpad X220 with an I5-2520M and 16GB of RAM.

I purchased a PE4L 2.1 from HIT about t 2 months ago along with a used GTX 460- running @ x1.2opt

I've been experiencing some problems (BSOD, constant driver crashes, extremely sluggish frame rates w/ internal screen, disappearing mouse cursor w/ external screens) and have (I think) narrowed it down to the GTX 460. I have tried out two other video cards, an 8800GTS 320mb and a 4850 1GB, and they appear to work fine, w/o any driver crashes or BSOD.

I am wondering if I would be able to run an AMD HD7850 2gb with my laptop. I am aware of the requirement of a 256mb memory space to run AMD cards- however, I noticed in one of the test configuration reports from NANDO ( http://forum.techinferno.com/diy-e-gpu-projects/2747-12-5-dell-e6230-gtx660%40x1-2opt-hd7870%40x1-2-pe4l-ec060a-2-1b.html#post37197 ) that the Dell E6230 was able to run it without resorting to any ACPI modifications to move the egpu memory allocations to 36-bit space.

Would I be able to reliably run the HD7850 2gb with the X220 w/ 16GB RAM?

Only issue I forsee is your 16GB. We've had numerous reports of Thinkpads seeing poor performance, stuttering and what not, with the solution being to downgrade to 8GB. Not sure what the problem causing it is. It must be solvable as we have other non-Lenovo eGPU 16GB implementations without such issues. So a fix might be say disabling as many PCIe devices as feasible in Device Manager or acquiring Setup 1.x and performing a PCI compaction helps.

Tech Inferno Fan is right. if you experience a cardinal slowdown of your x220 with 16GB of RAM, please let Lenovo know on their forum and preferably also file a ticket to their technical support. The problem is typical for all X220/X230(t) series.

Of course the worst outcome might be that a 550ti can't actually make use of more bandwidth than x1 1.0 (!)...

Shoot, that must be it I check on the web, no one scored more that 2500 in 3Dmark11 with 550Ti. Need to look for another card then...

Received the new PE4L soldered on both ends. GPU-Z reports 2.0 x16 @ x1 2.0, NVIDIA configurator also says the bus is Gen2. But 3Dmark sees it as x1. Something is wrong. I get same results as with PE4H on x1 speed.

Results with PE4H:

15767 3DMark 06

P9063 3DMark Vantage

Results with PE4L:

15392 3DMark 06

P9789 3DMark Vantage

P2463 3DMark 11

Comparing to other people with similar configuration (x230) I get at least twice less scores for 3DmVantage and 3Dm11. Any suggestions?

Bplus was very nice to give me a refund and even cover the shipping! Extremely pleased with their service. Now waiting for PE4L-PM060A to arrive from HIT

Apparently Bplus has updated the PE4H page, no more saying Gen 2 support. Still no reply if they give me a refund.

Interesting and frustrating, upgraded to Win8 and scored 1000 less Result

Just my 2c to this amazing community. The refund difference will probably go to cover the shipping back to Bplus. And I had to sacrifice Setup 1.x free copy from HIT.

* you have some other instability problem eg: insufficient power to drive the eGPU, the video clocks are not stable or the PE4H+EC060A isn't Gen2 compliant. You can the latter by switching your expresscard slot to Gen1 spec in the bios if it has that setting, or use the Setup 1.1x to do it. If it works without BSODing at Gen1 speed by fails at Gen2 speed then the PE4H+EC060A isn't Gen2 (pci-e 2.0) compliant.

I'm interested in your Gen1/Gen2 PE4H-EC060A 2.4 test results.

You're right. I set Gen 1 compatibility mode in BIOS and it worked just fine. 3DMARK06 Scores 15767

But no luck with Gen 2. Windows just crackles with errors all the time and no Aero. I can't even open context menu anywhere, and trying to switch to external screen just kills Windows. GPU-Z still reports it's x1 speed

Should I write to Bplus and ask for a replacement?

I got a new x230 and I think I have the TOLUD problem. I have BIOS 2.02 and I though the problem was fixed by Lenovo long ago After numerous BSOD's and other booting problems I managed to take a screenshot of PCI bus memory allocation. I have only 4GB RAM installed.

I use PE4H 2.4 + EC060A with PCIe Gen 2 support + GTX 550Ti. Any x230 owners?

Hi Tech Inferno Fan. I was watching your battle with Lenovo on TOLUD problem. While was resolved for x220, how is it with t420s? Do you know if the problem was fixed in BIOS 1.31?

Hey guys, I'm new to this forum, but came a long way through NBR and Computerbase forums.

I have a Lenovo T410 with NVS3100M graphics and a PE4H + GTX460 eGPU running. Only Problem is I can't turn off the dGPU, not within the BIOS, nor with Setup 1.x.

What I've done already:

• setup the eGPU with the laptop
  
• eGPU works alongside the dGPU with 30% Performance of other GTX460 eGPU setups (3DMark 5300)
  
• tried to turn off dGPU with Setup 1.x - result is system hangup every time
  
• tried to turn off dGPU within Windows device manager - only iGPU is recocnized when rebooting into Windows, eGPU present but not active in device manager
  
• tried to use "dGPU demoted-on" mode, without any performance difference
  
• all compact methods won't change anything
  

So I need your help please.

I got a clue in the computerbase forum, that my system T410 with NVS3100M is popular for making problems with getting eGPU to work, but I really want it to work

Here's a screenshot of my system specifications.

https://www.dropbox.com/sh/yyxt81ixagktl17/vF8AdlJyUj/t410_systemspecs.jpg

Hi Maik and all others. I've been reading the forum for quite a while and now I decided to register I have exactly the same 2522KDG model of T410 with NVS3100M. I already bought GTX550Ti and almost finished building my own eGPU enclouse. I'm in the middle of placing an order of PE4H. I'm planning to do a x2 setup with either ExpressCard + mPCIe or mPCIe + mPCIe. I found on the web the schematics datasheets of T410, accoring to which it would be possible to sacrifise wifi/wlan connectivity altogether for x2 setup. But still I wasn't expecting that even x1 setup would be so low performace. Why need to disable iGPU, would it in theoty increase the performance?