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Palit Radeon HD 4870 Wont post - PSU Proble>#m?

post #1 of 14
Thread Starter 
Hello

I Would really appreciate some advice on a graphics card problem im currently experiencing.

I in the final stages of a new build - my following specs are as follows;

Cooler Master RS-500-PSAP-J3 PSU
Abit N68-S3
4GB DDR3 1333mhz
AMD x3 710

Unfortunately, my PSU only has one PCI-E 6 Pin connector and my GPU requires two, an oversight on my behalf.

I've acquired an adaptor to convert two molex into 1 x 6 pin PCI-E but when both are plugged in to the card the computer doesn't post - whether this is the graphics card or a power supply problem im not sure (although everything else works fine as I've had it working with the on board graphics fine.)

With the Graphics card in the PCI-E slot and the two ends attached two it, when i turn the PC on the fans will spin full for 3 -5 seconds then go to a normal speed. From past experience this is normal.

could this problem be a sign of the PSU not powerful enough? iv read elsewhere the Cooler Master Elite Power RS-500 500w ( my PSU) will power the 4870 but it clearly isnt in this instance

or am I doing something wrong which is really obvious?

Any help would be of great assistance.

PSU Specs are

+3.3v
22a
+5v
20A
+12V1
20A
+12V2
20A
-12v
0.8A
+5VSB
2.5A
post #2 of 14
Will it post while the 4870 is installed but not used as the display output?
It sounds like it's posting, just no signal.
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Mighty-iTX
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CPUMotherboardGraphicsRAM
i7-4770K M7-Impact Strix GTX980 Samsung 
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Crucial M4 256 Glacer 240L W8.1 K272HUL 
KeyboardPowerCaseMouse
Saitek Seasonic X-650 Prodigy MX518 
CPUMotherboardGraphicsGraphics
4770K/45/43 Maximus VI Extreme R290X R290X 
RAMHard DriveHard DriveOptical Drive
Samsung Crucial M4 64GB RAIDR LSSWM 
CoolingOSMonitorKeyboard
Cooler Master Glacer 7 Ultimate 64 SyncMaster Eclipse 
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XFX 1050 BE 600T Silver MX518 Desk 
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i5-4330 Z87 Gryphon GTX690 G.Skill RipJawsX 
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post #3 of 14
Thread Starter 
I get nothing on my monitor.... and from memory the lights dont flash on my keyboard although ill check.
post #4 of 14
EDIT: Make sure it is firmly in the slot and power connectors are IN. is the molex you are using seperated or daisy chained onto your case fans?
post #5 of 14
Thread Starter 
So, ive taken the whole Mobo out and have it resting all on my bench.

the computer post when the graphics card is in but there is nothing on my screen unless i unplug the VGA lead from the graphics card and plug it into the onboard.

SpeedNuggeT - i've linked the splitter which has two moles ends to both the molex ends coming straight from the PSU.
post #6 of 14
Quote:
Originally Posted by RonnyWhizz View Post
So, ive taken the whole Mobo out and have it resting all on my bench.

the computer post when the graphics card is in but there is nothing on my screen unless i unplug the VGA lead from the graphics card and plug it into the onboard.

SpeedNuggeT - i've linked the splitter which has two moles ends to both the molex ends coming straight from the PSU.
I would go ahead and format, get to windows and see what it makes of the 4870.

Also is there anything in the bios that pertains to video signal boot priorities?
Mighty-iTX
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KeyboardPowerCaseMouse
Saitek Seasonic X-650 Prodigy MX518 
CPUMotherboardGraphicsGraphics
4770K/45/43 Maximus VI Extreme R290X R290X 
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Samsung Crucial M4 64GB RAIDR LSSWM 
CoolingOSMonitorKeyboard
Cooler Master Glacer 7 Ultimate 64 SyncMaster Eclipse 
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XFX 1050 BE 600T Silver MX518 Desk 
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i5-4330 Z87 Gryphon GTX690 G.Skill RipJawsX 
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Mighty-iTX
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One foot in..
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i7-4770K M7-Impact Strix GTX980 Samsung 
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Crucial M4 256 Glacer 240L W8.1 K272HUL 
KeyboardPowerCaseMouse
Saitek Seasonic X-650 Prodigy MX518 
CPUMotherboardGraphicsGraphics
4770K/45/43 Maximus VI Extreme R290X R290X 
RAMHard DriveHard DriveOptical Drive
Samsung Crucial M4 64GB RAIDR LSSWM 
CoolingOSMonitorKeyboard
Cooler Master Glacer 7 Ultimate 64 SyncMaster Eclipse 
PowerCaseMouseMouse Pad
XFX 1050 BE 600T Silver MX518 Desk 
CPUMotherboardGraphicsRAM
i5-4330 Z87 Gryphon GTX690 G.Skill RipJawsX 
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post #7 of 14
Thread Starter 




The second one shows the splitter going to two molex ends coming out of the PSU.
post #8 of 14
Thread Starter 
Quote:
Originally Posted by grunion View Post
I would go ahead and format, get to windows and see what it makes of the 4870.

Also is there anything in the bios that pertains to video signal boot priorities?
ah sorry i mean it does post however when i have the VGA plugged into the 4870 nothing comes up on screen. When i put that same VGA into the onboard everything is fine and dandy and I can get into windows.

nothing is recognised in the device manager
post #9 of 14
Quote:
Originally Posted by RonnyWhizz View Post
So, ive taken the whole Mobo out and have it resting all on my bench.

the computer post when the graphics card is in but there is nothing on my screen unless i unplug the VGA lead from the graphics card and plug it into the onboard.

SpeedNuggeT - i've linked the splitter which has two moles ends to both the molex ends coming straight from the PSU.
there's you're problem use the onboard and go into the bios and look for video settings and disable the onboard and it should work.
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Tha Beast!
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post #10 of 14
Thread Starter 
im in the BIOS and the only option I can see is in the "chipset configuration" where it displays "primary graphics adapter" which i have switched from onboard to PCI Express.

Still, no dice.
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