Post by gjaky on Jun 27, 2015 4:42:14 GMT -5
So it seems my DELL Optiplex 745 MT mobo died.
-I bought a new pcie VGA card (AMD R7 250) installed, and during testing I was surprised to see the card lags as hell, was much worse than my previous card, an AMD HD4850 (that died: visual artifacts, freezing etc.).
-So it turned out that this card in this mobo doesn't change to upper modes than pcie 1.1 1x even under load.
-Reconnected the card a few times (power off, psu plugged in), to check it sits securely in the slot.
-The connection speed didn't get better, but otherwise it was working.
-I was desperate and wanted to pull out the card to check in an other mother board, again: power off, PSU plugged in. The card was half out off the connector when the computer simply just turned on (I didn't press the button). The main CPU fan spun up at full speed (usually it remains very silent) the power button's color turned solid yellow (otherwise it is green).
-Since that I got no more from that, I removed everything (CPU, RAM, all cards, and sata devices) just the power was going to the mobo. Still the same! Not even a beep, no error codes, just a solid yellow LED and a full speed CPU fan, no POST, although it responds to the power off switch, and senses if there is a HDD connected or is it connected to LAN.
-Tried a different PSU -> no luck.
-Vbat is around 2,8V which should be fine I think.
Any idea what should I check? (other than is there place for this in the junk bin
)
-I bought a new pcie VGA card (AMD R7 250) installed, and during testing I was surprised to see the card lags as hell, was much worse than my previous card, an AMD HD4850 (that died: visual artifacts, freezing etc.).
-So it turned out that this card in this mobo doesn't change to upper modes than pcie 1.1 1x even under load.
-Reconnected the card a few times (power off, psu plugged in), to check it sits securely in the slot.
-The connection speed didn't get better, but otherwise it was working.
-I was desperate and wanted to pull out the card to check in an other mother board, again: power off, PSU plugged in. The card was half out off the connector when the computer simply just turned on (I didn't press the button). The main CPU fan spun up at full speed (usually it remains very silent) the power button's color turned solid yellow (otherwise it is green).
-Since that I got no more from that, I removed everything (CPU, RAM, all cards, and sata devices) just the power was going to the mobo. Still the same! Not even a beep, no error codes, just a solid yellow LED and a full speed CPU fan, no POST, although it responds to the power off switch, and senses if there is a HDD connected or is it connected to LAN.
-Tried a different PSU -> no luck.
-Vbat is around 2,8V which should be fine I think.
Any idea what should I check? (other than is there place for this in the junk bin
)
