Solved HDMI on HD4670/Win7-64 = Black Screen on Start-Up! (works on XP-SP3?)

[donse]

Confused - help!
I get black screen when booting right after splash-screen w. Windows 7 (64-bit sys. in dual boot w. XP-SP3) - but the problem is only there when i have a HDMI-cable attached to the HD4670 card (with or WO my Samsung PS50C7700 hooked up at the other end of the HDMI-cable?).
With no HDMI attached to the grafics-card Windows 7 boots fine!
(EIZO-monitor S2110W on DVI all the time).

So no HDMI in Windows 7 - or what?!?

I have the HD4670 card running on the exact same hardware in Win XP-SP3 (same machine, dual boot) - and it's working just fine in XP-SP3 (WO sound on HDMI though...). What is this all about - pls help :}

System:
Asus P5Q-Pro (BIOS v. 1613), Intel E8400/3Ghz, 8 GB OCZ PC-6400 DDR-2, Sapphire ULTIMATE HD4670 (512 GDDR-3) w. Catalyst 12.2, Windows 7 Home Premium (dual boot w. XP-SP3 on separate HD's). RAID-enabled system w. 1 GB RAID-1 storage attached.

 

[TanyaC]

Had exactly the same problem.

I did two things to fix; First I lowered the resolution to 1280x1024 and it worked, but that drove me crazy, so I bought a Intel card with 1gb of video memory, which I'm told is the minimum one should use if one wishes to use HDMI HD 1920x1080. It probably would have worked fine with an ATI as well, but with at least 1gb of RAM.

The card I bought was a Gigabyte GTX 450 and I might have been able to go lower, but since it was only $90 I figured it was worth it.

If you have a card with 1gb perhaps you could give that a try, or try lowering the resolution and (maybe), color depth.

The machine in question was Windows Server 2008 R2, but hey, it's essentially the same as windows 7.

Just my 2 cents worth.

 

[donse]

In this case 512 MB is propably more than plenty for 1080/24p/60Hz (especially when not talking 3D/heavy gaming).
Up front it is simply not (lame?) RAM alone that matters here:
Rather you must first look at core-speed, stream-processors, RAM-clock and bus-size. It's 750 Mhz core/380 sp/1746 Mhz clock and a nice wide 128-bit memorybus on this card = all together and w. 512 MB it is more than quick and powerfull enough for HD
This will likely prove to be evident just the same if you look at actual RAM-usage on your GFX-card under use/test?

Further for dual-boot w. XP it is just not attractive to eat up more RAM-capacity than necessary by installing an (excessively) large memory-capacity grahpic accellerator, that eats away of the limited 3,7 GB total RAM-capacity of XP (I still do Photoshop and other RAM-hungry apps. here...)

I've solved the Windows 7-black-screen-upon-boot problem quite easy after all (after MANY hours of unfruitfull searching the web and supportpages...): Hit F8 during boot and set screen to boot in 640 - Windows 7 then automatically resolves to the correct screen res (1680x1050) during startup (EIZO w. USB-interface connected!).
And thereafter of course i could install Windows 7 updates + all relevant update/Win7 drivers from Sapphire/AMD (not possible before due to black screen obviously).

It all runs beautifully now 8)