Monitor runs at 60Hz with HDMI, 120Hz DVI?

[Sovelin]

Hello all. I recently purchased the VG236HE, a monitor capable of 120Hz. When I ran it with a DVI cable, I was able to select 120Hz refresh rate, and I was happy. I recently tried running it with an HDMI cable off of my GTX580, and now I only get a 60Hz refresh rate. Why this discrepency?

http://www.newegg.com/Product/Product.aspx?Item=N82E16824236104

 

[Kari]

hdmi doesn't have enough bandwidth to transmit 1080 picture @120Hz, while dual-link dvi does.

 

[sykozis]

hdmi 1.4 does....hdmi 1.3 does not.

 

[Kari]

according to wiki
HDMI version 1.0–1.2a 1.3 1.4
Date initially released December 29, 2002 June 22, 2006 May 28, 2009
Maximum clock rate (MHz) 165 340 340[53]
Maximum TMDS throughput per channel (Gbit/s) including 8b/10b overhead 1.65 3.40 3.40
Maximum total TMDS throughput (Gbit/s) including 8b/10b overhead 4.95 10.2 10.2
Maximum throughput (Gbit/s) with 8b/10b overhead removed 3.96 8.16 8.16
Maximum audio throughput (Mbit/s) 36.86 36.86 36.86
Maximum color depth (bit/px.) 24 48[A] 48
Maximum resolution over single link at 24-bit/px 1920×1200p60 2560×1600p75 4096×2160p24
Maximum resolution over single link at 30-bit/px[C] N/A 2560×1600p60 4096×2160p24
Maximum resolution over single link at 36-bit/px[D] N/A 1920×1200p75 4096×2160p24
Maximum resolution over single link at 48-bit/px[E] N/A 1920×1200p60 1920×1200p60

they have the same throughput.

1.4 supports 3d stuff with "the frame packing 3D format at either 720p50 and 1080p24 or 720p60 and 1080p24, side-by-side horizontal at either 1080i50 or 1080i60, and top-and-bottom at either 720p50 and 1080p24 or 720p60 and 1080p24.[123]" but no 120 hz

 

[Sovelin]

Hmm, interesting. And here I always thought HDMI was the superior cable. Would I be able to watch blu-ray with a Dual-link DVI? I thought there was some DRM issue and you had to use HDMI. How would I watch 3D blu-ray movies if I can't use HDMI?

 

[Kari]

afaik you dont need to have 120Hz to watch 3d bluray, so hdmi 1.4a will work just fine.
and hdcp works over dvi on most 'newer' monitors as well

 

[Sovelin]

Best answer selected by sovelin.

 

[Sovelin]

Thanks so much!

 

[Kari]

no prob.