Cannot get 120hz on my tv with 9800gt

Papagolash

24.24.2.2194 [Incarcerated]
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Nov 11, 2001
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#1
I just purchased a Samsung UN46ES6500FXZA and read that in order to obtain proper 120hz output with my NVIDIA 9800gt, that I would need a dual DVI to HDMI output. So I purchased a dual DVI to HDMI adapter, and have a 1.4a HDMI cable connected to my tv. I still cannot change my refresh above 60hz. I've tried customizing it and it gives me a black screen at 120hz.

I have Windows 7, 32-bit with 4 GB of RAM. My processor is a Dual Core 2 Duo E8500 at 3.16GHz each. My latest NVIDIA drivers are 301.42, and my card is in a PCI-E slot. What am I doing wrong, if anything? Thanks.
 

Bluestreak

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Sep 27, 2007
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#2
Do you need 2 cards running in parallel to get your 120Hz?
It doesn't make a lick of sense that you can't do it, unless you're being limited by the 2-1 dongle.
 
Apr 30, 2011
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CLT
#3
Can you verify that the same HDMI input works on 120hz on another device like a set top box or DVD? Also check your model on the SS website and see if your set has the latest firmware, updating firmware is usually pretty easy. Sometimes these sets just dont work well with computer on HDMI. I have an older SS 32" that the PC-HDMI only works on one of the 3 ports for example. Otherwise does 60hz work OK?
 

Bobobie

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Oct 1, 2005
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#4
Check the video settings and see if the computer is identifying the actual make and model of TV or it's seeing it as a generic monitor. Windows 7 is usually pretty good about identifying TV's and setting it to the max native resolution.
 

Papagolash

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Nov 11, 2001
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#5
To answer a few questions, I never read anything about needing to put the card in to SLI, only that it needs a dual DVI to HDMI converter. I cannot test the cable on another device unfortunately. The comp recognizes the tv, and the tv has the latest firmware, all three hdmi ports give the same result. One thing that you guys made me thing of is the cable itself says it does 60Hz, no mention of anything higher. What throws me off is that it's a HDMI/ethernet cable, that does high speed rates at 10.2 Gbps, along with ARC, etc. Wouldn't that be able to do 120+? Or can you actually get all of that stuff but still be limited to 60Hz? My friend gave me the cable when I bought the tv. That right now is the only thing I can think of that's incorrect.
 
Apr 30, 2011
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#6
X hertz in hdmi cable should be nothing more than marketing scam typical monster cable type nonsense.

Assume your resolution set on pc is 1920 x 1080? Since that is what is native on "tv" screens.

As far as nvidia video card and hz is concerned the dual dvi @ 1920 x 1080 can do 120hz no doubt. Dual dvi at higher resolutions 2560 x 1600 is 60hz but that res is on large computer type displays, not tvs.

Hdmi/ethernet sounds like an extension cable, is it real long, or are there dongles or ac adapter? You are not talking about 60hz as in home ac electrical current? Cat5/ethernet cable is used when long pulls are needed, usually hdmi type cable over 50' is unreliable. Yes sometimes these devices mess up odd cases like this.

This is probably the answer, i was looking at a ss manual for some info, didnt pay attention to model but it was same size samsung and brand new like yours. There was a brief page about connecting to a pc and advising to set pc config for 60hz, no mention of compatible at 120hz for pc.

One other possibility because of hdcp sometimes a perfectly good source is sending out good hd signal but because of messed up hdcp handshake you get no video.
 

Bobobie

Registered User
Oct 1, 2005
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#7
An easy way to test the theory that the Ethernet to HDMI cable is the problem, Set the computer next to the TV and connect it directly to the TV via an HDMI cable.
 

Papagolash

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Wackbag Staff
Nov 11, 2001
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#8
It's the standard 1920 x 1080 on the tv. It's just a regular 6 ft hdmi 1.4 cable. They all come part ethernet cable nowadays. http://en.wikipedia.org/wiki/HDMI#Version_1.4 What throws me off about the cable I'm using is that on the box all the stats show for a "high speed" cable, yet says it'll do 60hz which is baffling me. It should be able to do at least up to 240, when doing research on cable specs.

I talked with Samsung yesterday and perhaps the guy didn't know what I was trying to ask him, but he said anything that gets broadcasted on the tv is 120hz, and that if the comp is outputting 60hz that it gets upconverted. Not really answering my question though as to why I don't have the option, or can't manually force the card to output 120hz, with the current and assuming correct setup that I have.
 
Apr 30, 2011
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CLT
#9
It's the standard 1920 x 1080 on the tv. It's just a regular 6 ft hdmi 1.4 cable. They all come part ethernet cable nowadays. http://en.wikipedia.org/wiki/HDMI#Version_1.4 What throws me off about the cable I'm using is that on the box all the stats show for a "high speed" cable, yet says it'll do 60hz which is baffling me. It should be able to do at least up to 240, when doing research on cable specs.

I talked with Samsung yesterday and perhaps the guy didn't know what I was trying to ask him, but he said anything that gets broadcasted on the tv is 120hz, and that if the comp is outputting 60hz that it gets upconverted. Not really answering my question though as to why I don't have the option, or can't manually force the card to output 120hz, with the current and assuming correct setup that I have.
Now I know what you mean by ethernet/hdmi, saw that before and thought you were using a piece off cat5 with dongles to convert to hdmi. That cable should be capable of any hz even above 120.

Look in your manual about using your TV with pc and it clearly says 60hz only and to set your graphics card as such. Using some flat panels as a pc monitor seems to be hit or miss. I have seen many that the pix looked worse when using hdmi over using the RGB input most earlier sets had.
 

Papagolash

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Wackbag Staff
Nov 11, 2001
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#10
Yep, online manual says to run it at 60hz, good call show_reference. Thanks yall for helping!