PC unusably slow after graphics card installation

[ryandward]

http://www.sevenforums.com/general-...very-slow-after-installing-windows-7-a-2.html

I am having the exact same problems mentioned here.

The only thing I have been able to do to remedy the issue is to go to command prompt and under bcdedit truncatememory to 3GB.

I have 6GB installed memory, but without truncation the computer crawls so slowly it's unusable.

Here's my build:
CPU: i7 950 @ 3.06GHz, codename Bloomfield
Motherboard: Foxconn Renaissance
RAM: OCZ Platinum (3 x 2GB @1600MHz 7-7-7-24 @1.65V)
GPU: EVGA GeForce GTX760 2GB GDDR5 256bit
PSU: EVGA SuperNOVA 850G2 850W, Modular
Case: Antec DF-85 Black Steel/Plastic ATX Full Tower Computer Case
OS: Windows 7 Home Premium x64
Display: Samsung HG40NA570 - 40" LED Smart TV - 1080p

Is there anything I can do to fix the problem without having to resort to cutting off half of my RAM?

 

[carwiz]

When did you install it? It can take many hours for Windows to complete indexing and updates. Also verify that you did indeed install x64.

 

[Layback Bear]

Instead of sending us to another thread could you state exactly what problem you are having and when.

Do you have the motherboard manual??
Have you installed the ram in the slots exactly as per the motherboard manual?

 

[ryandward]

Sure. I am having some kind of memory conflict.

I have 6GB of memory installed, and when I installed a new graphics card the system slowed down to the point of being totally unusable. It takes 10-15 minutes to load, and the mouse lags about 20 seconds behind where it should be.

I upgraded from a GeForce GTX 275 1GB to a EVGA GTX 760 2GB.

I've tried everything, but the only thing that really helps is when I remove one stick of 2GB RAM from my PC. Then the system boots up fine. It's not any specific RAM that matters, because I've tested all of them, and no matter which one I remove, it works. That's how I came up with the idea to truncate the memory.

The problem feels like a Windows problem though, because when I run Ubuntu from my USB it works fine. But Ubuntu only recognizes 5.6GB of RAM as usable, whereas Windows doesn't.

Also, I've tried to reinstall Windows, and the system is so unresponsive that I can't even get through the screens to click "Next" and "Agree" in less than an hour, unless of course, I remove some RAM. Before I installed the Windows upgrade using my old graphics card, and the process was totally normal.

 

[ryandward]

double post

 

[carwiz]

"Installed it" meant Windows. I was under the impression you newly installed Windows. That's some of the confusion that occurs by referring to another thread and saying you have the same problem.

1. Did you remove the drivers for the old video card?
2. Did you test the memory slots? Follow the procedure for Memtest86+ and run it for at least seven passes. Take special note at the end for testing the slots.

 

[Layback Bear]

As requested in my post #3

Do you have the motherboard manual??
Have you installed the ram in the slots exactly as per the motherboard manual?

 

[gregrocker]

Is your PSU sufficient for new card? Check here: Psu calculator - Windows 7 Forums
If you remove the card does it resolve the issue?

Test your RAM - Test with Memtest86+ exactly like it says in the tutorial, for 7 passes or overnight.

Then work throught the other Troubleshooting Steps for Windows 7.