VTX3D R9 290X X-Edition, now the computer keeps restarting.

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Wutan87

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Mar 14, 2015
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As stated in the title. I just got a VTX3D R9 290X X-Edition, plugged it into the motherboard, however now the computer keeps restarting after a few minutes. After 10-15 minutes of doing nothing(dekstop only), 10 minutes of playing a normal video, 5 minutes of gaming (Tested on Assassin's Creed Black Flag). My motherboard is a M4A785T-M, which supports the GPU's required pcie x16 slot. The previous GPU (Radeon 5770) worked normally.

I thought the problem would be the lack of power from my current PSU (capped at 660 Watts), so i bought a completely new one capped at 850 Watts. Still the same problem. As advised from the instructions i uninstalled anything related to the old card, drivers and all. Same problem. My OS is Windows 8.1.

Does anyone else have any other suggestions i could try? Would really appreciate the help.:D
 
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Cristi72

Cristi72

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Jun 25, 2014
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Hello,

It's not the PSU rating which matters most, but its quality. A good 660W PSU is perfectly capable of powering an R9-290X. It could be also the motherboard' slot; power the system OFF and lay the system on the right side panel, see if it changes anything (the R9-290X is a massive and heavy card, maybe its own weight deforms the slot).

What is the make/model of the new PSU?
 
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Wutan87

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Mar 14, 2015
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The PSU is 850W LC-POWER LC8850III V2.3 80 GOLD. I have also tried to download MSI Afterburner to change settings for the GPU to 1000Mhz instead of the default 1250Mhz and i split the power usage from 1 cable to 2 PCIe x16 cables and in MSI Afterburner i checked constant voltage. Worked normally for a while (20min) but in the end restarted anyways. Gonna just return the GPU for a refund.
 
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Cristi72

Cristi72

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I couldn't find a review for your PSU, but the previous version, 850W 2.2, has only 55% on average positive customer reviews (and the 2.3 version is quite expensive). On Tom's PSU tier list, LC-Power PSUs are rated as Tier 4, so not suitable for high-end components, and the R9-290x is a high-end component (Tier 1: the best, Tier 5: smokey with a chance of sparking; check this: http://www.tomshardware.co.uk/forum/id-1804779/power-supply-unit-tier-list.html).

The constant voltage doesn't matter, because in Afterburner you have listed only the GPU voltage (around 1.1V). The most important in such cases are the PSU voltages, with values within +/- 5% variation from the nominal value at full load. Check the voltage values (+12V, +5V, +3.3V) in BIOS and Windows (for Win: CPUID HWmonitor).

I also forgot to ask: what are the CPU/GPU temperatures? It should be lower than 60 C (CPU) and 80 C (GPU).
 
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Cristi72

Cristi72

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If these are the temps in idle, there is a problem with the CPU cooler (blocked or broken fan, heatsink clogged with dust, dried thermal compound between the CPU and the heatsink). You still use the stock CPU cooler? Dismantle it, clean both the CPU heatspreader and the heatsink, change the thermal paste and remount the cooler.
 
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