question about 'max resolution' spec

Easy Rhino · Feb 26, 2013, 07:40 PM

If a VGA says it can do a max res of 2560x1600 does that mean that it maxes out PER PORT? for instance, if a VGA has two dvi ports will the card do 2560x1600 per port?

[Ion] · Feb 26, 2013, 07:42 PM

I should certainly think so. The GPU on the video card should be able to drive two ports at max spec.

cadaveca · Feb 26, 2013, 07:48 PM

Quote:

Originally Posted by Easy Rhino

If a VGA says it can do a max res of 2560x1600 does that mean that it maxes out PER PORT? for instance, if a VGA has two dvi ports will the card do 2560x1600 per port?

Nope. Not "Per Port". Depends on the the connector type. Some brands explicitly state which port is capable of which rsolution, but not all do. Also, refresh-rate possible at each res may vary.

2560x1600 is the perfect example, since it requires Dual-Link DVI. Many cards can only do this on a single port only, while others are single-link.

xvi · Feb 26, 2013, 07:49 PM

I thought the memory needed for a frame buffer should be X resolution times Y resolution times color depth (24, typically). 2560x1600x24 comes out to ~12 MB though, so I think I'm forgetting something somewhere.

It's probably per port. The clock required for anything higher might invoke corruption.

Easy Rhino · Feb 26, 2013, 07:51 PM

OK, so how about this card?

EVGA 02G-P4-2651-KR GeForce GTX 650 Video Card - N...

xvi · Feb 26, 2013, 07:56 PM

Quote:

Originally Posted by Easy Rhino

OK, so how about this card?

EVGA 02G-P4-2651-KR GeForce GTX 650 Video Card - N...

Depends. What do you need it to do?

Easy Rhino · Feb 26, 2013, 07:59 PM

Quote:

Originally Posted by xvi

Depends. What do you need it to do?

it needs to power 2x 1920x1080 displays using DVI.

mainly for sys admin stuff and programming. no gaming.

[Ion] · Feb 26, 2013, 08:00 PM

Quote:

Originally Posted by Easy Rhino

it needs to power 2x 1920x1080 displays using DVI.

mainly for sys admin stuff and programming. no gaming.

Easy--I can't think of any modern card that won't do 2x1080p

cadaveca · Feb 26, 2013, 08:03 PM

Quote:

Originally Posted by [Ion]

Easy--I can't think of any modern card that won't do 2x1080p

Even over VGA. 1080p/1200p is about the limit for VGA plugs (2048x..uh..1536 ??? max)

[XC] Oj101 · Feb 26, 2013, 09:53 PM

I've done 2580x2048 on an old CRT monitor over VGA, it's not a problem

ChristTheGreat · Feb 26, 2013, 10:35 PM

It is per port. A card that support dual-screen will support max resolution, but it depends of ports. Some ports will do a max resolution while another will support higher.

xvi · Feb 26, 2013, 11:35 PM

The question I have now is "Why spend so much?" There are a few sub $50 options.

tokyoduong · Feb 27, 2013, 12:45 PM

Quote:

Originally Posted by Easy Rhino

If a VGA says it can do a max res of 2560x1600 does that mean that it maxes out PER PORT? for instance, if a VGA has two dvi ports will the card do 2560x1600 per port?

I think it is per port. Actually, I'm sure it is per port.

Used to have this SAPPHIRE 100283FLEX Radeon HD 5770 FleX 1GB 128-b...
eyefinity card. I was running 3 screens. 2 1080p and 1 1200p with no problems.

I used hdmi and dvi->vga conversion connector.

qubit · Feb 27, 2013, 12:48 PM

Quote:

Originally Posted by [XC] Oj101

I've done 2580x2048 on an old CRT monitor over VGA, it's not a problem

That must have looked amazing.

I'd love to see it for myself.

tokyoduong · Feb 27, 2013, 01:46 PM

Quote:

Originally Posted by qubit

That must have looked amazing.

I'd love to see it for myself.

I'd love to see it too. That monitor must weigh 50+ lbs

I remember my old 36" tube TV was like 150 lbs.

Feb 26, 2013, 07:40 PM	#1
Easy Rhino Linux Advocate Join Date: Nov 2006 Posts: 10,284 (4.27/day) Thanks: 1,219 Thanked 2,789 Times in 1,801 Posts System Specs	question about 'max resolution' spec If a VGA says it can do a max res of 2560x1600 does that mean that it maxes out PER PORT? for instance, if a VGA has two dvi ports will the card do 2560x1600 per port?

System Name:	The Rhinoceros
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Feb 26, 2013, 07:42 PM	#2
[Ion] WCG Team Assistant Join Date: Sep 2009 Location: North Carolina, US Posts: 10,798 (7.86/day) Thanks: 8,306 Thanked 9,491 Times in 4,322 Posts System Specs	I should certainly think so. The GPU on the video card should be able to drive two ports at max spec. __________________ Ion's WCG Essentials Thread Crunching (64 Threads + 896 CUDA Cores + 6272 Shaders): i3-2100@ 3.1 + HD7850 -- Atom D510 @ 1.66 -- C2D-M T9600 @ 2.8 -- i7-3612QM @ 2.8 -- i7-860 @ 2.9 + HD7950 -- i7-2700k @ 4.4 + 2xGTX470 -- PentDC-M T4200 @ 2.0 -- i7-920 @ 3.83 + 3xHD7770 -- DP Xeon E5420 @ 2.5 + HD7930 -- E1600 @ 2.4

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Feb 26, 2013, 07:49 PM	#4
xvi Join Date: Nov 2006 Location: Washington, US Posts: 902 (0.37/day) Thanks: 562 Thanked 238 Times in 130 Posts System Specs	I thought the memory needed for a frame buffer should be X resolution times Y resolution times color depth (24, typically). 2560x1600x24 comes out to ~12 MB though, so I think I'm forgetting something somewhere. It's probably per port. The clock required for anything higher might invoke corruption. __________________ Any computer, no matter how old, can serve a meaningful purpose. Behind every closet door is a dusty computer waiting to be reborn. Last edited by xvi; Feb 26, 2013 at 07:55 PM.

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Feb 26, 2013, 07:51 PM	#5
Easy Rhino Linux Advocate Join Date: Nov 2006 Posts: 10,284 (4.27/day) Thanks: 1,219 Thanked 2,789 Times in 1,801 Posts System Specs	OK, so how about this card? EVGA 02G-P4-2651-KR GeForce GTX 650 Video Card - N...

Feb 26, 2013, 09:53 PM	#10
[XC] Oj101 Join Date: Jan 2012 Location: South Africa Posts: 94 (0.18/day) Thanks: 45 Thanked 54 Times in 25 Posts System Specs	I've done 2580x2048 on an old CRT monitor over VGA, it's not a problem

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Feb 26, 2013, 10:35 PM	#11
ChristTheGreat Join Date: Jun 2007 Location: Repentigny Posts: 715 (0.33/day) Thanks: 415 Thanked 236 Times in 134 Posts System Specs	It is per port. A card that support dual-screen will support max resolution, but it depends of ports. Some ports will do a max resolution while another will support higher. __________________ Crunchers: i5 2500k @ 4.7ghz \| 4 threads @ 100% \| HD7950 GPU Xeon E3-3120 @ 3.1ghz \| 4 threads @ 70% Dell M6500 (i7 820QM) @ 1.8ghz \| 8 threads @ 30% Sempron 2600+ @ 1.8ghz \| 1 thread @ 70% X4 635 @ 2.9 \| 4 threads @ 30%

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Feb 26, 2013, 11:35 PM	#12
xvi Join Date: Nov 2006 Location: Washington, US Posts: 902 (0.37/day) Thanks: 562 Thanked 238 Times in 130 Posts System Specs	The question I have now is "Why spend so much?" There are a few sub $50 options. __________________ Any computer, no matter how old, can serve a meaningful purpose. Behind every closet door is a dusty computer waiting to be reborn.

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