Hello, first of all, I've ran through the checklist on TomsHardware site (31-perform-steps-posting-post-boot-video-problems) before posting this thread, but with no results. Now, to the problem. I've bought two identical PCs (lets call them 1st and 2nd) with the following build: Intel Core i5 4590 Tray Gigabyte GA-H97M-D3H SeaSonic 550W 80+ Gold S12G-550 G.Skill F3-1600C9D-8GAB Sapphire Vapor-X R9 280x Corsair Force GS 128Gb SSD (I've rechecked in 3 power consumption calcs and in voltage benchmark tests that 550w is enough for that build even during stresses). On both PCs a clean install of Windows 8.1 x64 has been performed. On both PCs the newest drivers for all parts are installed. The problem is that 1st PC runs perfectly, and 2nd PC is extremely slow: POST is heard after 20-30 secs, screen refresh rate is actually visible (the refresh line is slowly moves downwards from screen's top) and games are absolutely unplayable. Additional info: Both GPU cards runs great on 1st PC. Both of them runs horrible on 2nd PC. An old GPU (GeForce 9800 GT) runs fine on 2nd PC. Actions I've taken so far: Measured the voltage of 2nd PC's PSU - 12v rail provides 12v +/- 0.1V on both 8-pins connectors. Verified in AIDAx64 that the voltage graphs are stable. Verified that all the parts are sitting well in their slots on motherboard and all the power connectors are connected well. Restored defaults in the BIOS. Any ideas how can I identify the problem? The problematic part? I'm almost desperate! Thanks!
the best way to tell what the power consumption is is just to put one of those wattage meters inline. You know the ones that calculate your electricity usage, Thats what i do as they give specs for these things and they are wrong most of the time.
Hi, you're right. But when I choose parts to buy from internet, I don't have such an option as measuring their wattage. Anyway, don't forget that I've an identical PC that works fine.
Update: after a full power discharge (disconnecting the power cord and pressing ON button for 5 secs., and doing so 3 times) - the systems boots and works fine. The problem repeats after a night in shut-down mode. Update: As proposed in some threads, I've changed PCI-E configuration in BIOS to Gen2, instead of Auto/Gen3. Apparently, that solved the problem - the 2nd PC runs and boots fine for two days in a row. The question is: what is the cost? What is the downgrade in GPU's performance, when the slot is configured to Gen 2 ?
Hello, I had same issue a long time ago, it was caused by a bad driver install... Try to uninstall all your video drivers (use DDU in safe mode) and reinstall newest whql driver. It may help.
They can't. Edit: nevermind, I didn't read clearly... The difference will be Zero, Nil, Nada, Zilch, muchonothingo. No new cards even max out Gen 2 yet...
