I bought a new Video Card a little over a year ago.   I bought an EVGA NVIDIA GT620 2GB video card.
Card lasted about 6 months when something popped and the card died suddenly. EVGA did a warranty replacement and sent me a dead card. EVGA replaced that one with one that semi-worked, but painted a large stripe through the screen. EVGA replaced that one with a new one. This one seems to work.
 
However...  
 
In spite of doing regular clean installs of every new driver that has come out (about a half dozen), I keep getting regular Driver Crashes.
Screens will go black and come back after 15 - 30 seconds Often I get an error message indicating Video Driver Crash. Screens will freeze then come back after 1 - 2 minutes of disk activity. Screens will freeze and not come back without reset or reboot. Will get sudden BSoD with short countdown and automatic reboot. Issue seems to come up more when watching videos on YouTube or Facebook. Computer will crash a dozen times a day - more or less. Computer will spontaneously reboot without warning. Computer will crash within minutes of a reset or reboot.
I had been on a system disk for about 3 years and replaced it with a new HD and system install recently to try and get rid of this problem. It seems to be worse than before after only a month on the fresh system install!
 
Someone suggested that this may be a hardware problem with the Power Supply.
I am now considering replacing the PSU to see if this fixes the problem.
Is there any way I can load test the PSU?
 
Should I be looking at any other hardware?
 
Which PSU's should I be looking at buying - I'm on a budget, but I would like to get a high quality unit.
 
Thanks in advance for your comments!
 
System:
Asus P5K Premium
Intel Core 2 Quad Q6600
Windows 7 Ultimate SP1 with all updates.
Antec Truepower Trio 650 Watt PSU
4 GB OCZ DDR2 RAM
EVGA NVIDIA GeForce GT 620 - 2 GB RAM *
DELL 2407WFPHC Monitor on NVIDIA GeForce GT 620 Primary Monitor
Samsung SyncMaster 750S - 2nd Monitor (CRT)
Seagate 500 GB HD X2
Lots of other HD's
MediaSonic HD Bay with 4X SATA HD's on USB 3 port
LG BD Burner SATA
LG DVD Burner SATA
Generic USB 3.0 card
Note: RAM was tested with MemTest when first installed in 2007 - contiuous testing for 2 weeks with no errors detected. RAM was tested last week with MemTest and about a dozen passes were done with no sign of error.
 
Sushihunter
Vancouver, BC Canada
 
Happy 4th of July!

Sajin
Definitely replace the psu first and let us know if you continue to have issues. Great replacement psu... 

Thanks for the reply.
 
Not sure if this will help, but here is the error code I get on most of the crashes - This is crash #34
 
 
Problem signature:  
Problem Event Name: BlueScreen   OS Version: 6.1.7601.2.1.0.256.1  
Locale ID: 4105
 
Additional information about the problem:   BCCode: 124  
BCP1: 00000000  
BCP2: 86F8801C  
BCP3: B2000040  
BCP4: 00000800  
OS Version: 6_1_7601  
Service Pack: 1_0  
Product: 256_1
 
Files that help describe the problem:  
C:\Windows\Minidump\062916-50778-01.dmp   C:\Users\Jim\AppData\Local\Temp\WER-94131-0.sysdata.xml
Read our privacy statement online:  
If the online privacy statement is not available, please read our privacy statement offline:   C:\Windows\system32\en-US\erofflps.txt

Sajin
124 usually points to the cpu not getting enough power when overclocking. Is your cpu overclocked?

No. No over-clocking.
 
I checked voltage with a meter - 12V is 12.26V  and 5V is 5.03V
Don't have a 3.3V reading available.
I just pulled and reseated the RAM
In addition to adding another 4 GBs of RAM for a total of 8 GBs
 
My first thought is the GT620 Video Card - mainly due to the problems I've had in the past with dead cards.
Second thought is the PSU starting to crap out and not providing enough power under load.
 
I'm on a pretty tight budget and really don't need any unplanned purchases, but I can't afford to be without a computer either.
 
Thanks!
Sushihunter
 

Sajin
124 is power related. Idle voltage readings don't really tell us much.

True.
 
Is there any way to load test the PSU?  Would a computer shop likely have the proper test equipment to do that?
 
Also,
 
As I am likely to be replacing my PSU soon, I'd like to go to a 750 Watt unit.
 
Two that I am looking at are the 750 SuperNOVA G2 and the 750 SuperNOVA P2.
 
While a little, (lot) more expensive than I would like to spend at the moment, I'm sort of planning on upgrading with a new motherboard, CPU and RAM in the future.
 
I figure it would be better to spend a little extra now on something I can use to power the new system, rather than come up short now and have to replace it with one of these two units say next year.
 
Thanks again,
 
Sushihunter
 
 

You can load test the psu yourself. Just run prime95 (small fft) & heaven 4.0 (max settings) at the same time and check the voltage on your psu while the programs are running. Let me know what the voltages are. I'd highly suggest getting a new psu anyway as it looks like your psu is 9 to 10 years old.

Next suggestion would be to boost the vcore a bit on your cpu to see if it helps resolve the problem.

Cpu is aging. Needs a bit more juice to make it run stable I bet. 0.10 should be good.

You many want to try 0.05 bumps instead then.

Let me know if increasing the vcore helps. 

One step at a time. Let me know if increasing the vcore has resolved the blue screen issue.

OK, I just bumped the Vcore voltage up another notch - Set to 1.3125V in BIOS
PC Probe II is reading Vcore as 1.29V
CPU temp is at 45C - 48C at idle (as I type this).
MB temp is 43C
I did get a freeze on the first boot and had to reboot by hitting the Reset button.
My Video Card:  http://www.evga.com/Products/Specs/GPU.aspx?pn=15FA5BF1-AADA-454D-8BDB-40F4BFBE959E
 
It has been suggested that I also bump the RAM voltage up by 0.01V to 0.05V
That may be my next step...
 
Thanks everyone for your help!!!
 
Sushihunter
 

My CPU default voltage, no overclock, ASUS P5N-D motherboard and Q6600 is 1.350v. I thought that was a little high myself but others say this is the normal voltage for my CPU. IDK.

Download core temp and set your vcore to what the vid states.
 
e.g.
 

 
1.325v would be the default voltage for a G0 revision Q6600.

And here it is after changing Vcore to 1.3250v
The temps spiked, but have settled down to around 68C on core#0 and 65C on the other 3 cores.
 

No blue screens yet?