graphics card — How to use EVGA GTX 970 to output to 2 Dell P2715Q monitors at 4K resolution at 60hz
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My EVGA GTX970 has 1 DisplayPort, 1 HDMI 2.0 and 2x DVI ports.
Unfortunately, the HDMI port on Dell P2715Q is only HDMI 1.4. Therefore, I can output 4K resolution at 30Hz.
Is there a way to get 4k@60hz for both of these Dell P2715Q monitors?
Is there a DisplayPort hub which split the signal to dual monitors at 4K resolution at 60hz?
- graphics-card
- hdmi
- nvidia-graphics-card
- displayport
- 4k-resolution
When did you buy your monitors? According to this support page from Dell’s website displays sold after February 2016 support HDMI 2. 0 but it’s not enabled from the factory.
You can enable HDMI 2.0 in your P2415Q or P2715Q flat panel displays purchased after February 2016 using the following steps:
- Unplug all video cables from the display. (Leave only the power connected to the display.)
- Power on the display.
- Select the HDMI (MHL) input option. (A floating dialogue box will appear.)
- Press and hold the button associated with the Green check mark for 6 to 8 seconds.
- A dialogue box appear that states HDMI 1.4 Enable/Disable
Select the option to Disable HDMI 1.4 support and press the button next to the green check mark to confirm the selection. - Re-connect the video cables to the display
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(Tested) GeForce GTX 970 and 4k @ 60Hz on HDMI 2.
0
GeForce GTX 980/970 are great graphics cards and one of the cool features is the support of HDMI 2.0. Why HDMI 2.0 is cool? Because it allows to have an insane 3840×2160 resolution at 60Hz on a 4K TV. That’s a crazy experience to work on a 49-inch monitor with a 4k resolution at 60Hz!
To display a 4k resolution at 60Hz, the video interface (HDMI, DisplayPort) needs to transfert 12Gbits/second of data:
– bit_per_channel = 8
– num_channels = 3 (RGB)
– resolution = 3840 * 2160
– 60Hz = 60 times per second
– bandwidth = 3840 * 2160 * 8 * 3 * 60
– bandwidth 4k@60Hz = 11.94 Gbits/sec
– bandwidth 4k@30Hz = 5.97 Gbits/sec
Here is a quick recap of HDMI and DisplayPort (DP) bandwidths:
- HDMI 1.2: up to 4.95 Gbits/sec
- HDMI 1.4: up to 10.2 Gbits/sec
- HDMI 2.0: up to 18.0 Gbits/sec
- DisplayPort 1.2: 17.28 Gbit/sec
- DisplayPort 1.
3: 32.4 Gbit/sec
As you can see, 4k @ 60Hz requires 12Gbits/sec so only HDMI 2.0 or DisplayPort 1.2 (and higher) can offer such a bandwidth. In 2014 and 2015, all new graphics cards should support HDMI 2.0 and DP 1.2 and all new TV screens should have HDM 2.0 inputs. Otherwise it’s a… rip-off!
I recently received this GTX 970 from MSI and one of the first test I instantly did (after installing latest R344.75) is to connect it to the LG 49UB850V. It worked like a charm:
The NVIDIA control panel has two choices: 4k @ 30Hz (Ultra HD section) and 4k @ 60Hz (PC section):
LG 49UB850V HDMI inputs:
A thing remains a bit mysterious for me: it’s not clear if it is 4k @ 60Hz with 4:4:4 chroma subsampling ratio or it is rather 4:2:0 chroma? According to some sources (like this one) over the Net, LG UB850 supports 4k @ 60Hz 8-bit 4:4:4:
When it comes to native 4K content, the UB8200 supports 4K @ 60Hz, albeit only 8-bit 4:2:0, on all HDMI inputs.
The UB8500, on the other hand, supports 4K @ 60Hz feeds with higher color depth (10 and 12-bit) and chroma subsampling ratio (4:2:2), as well as 8-bit 4:4:4, albeit only on the HDMI 3 input (the remaining HDMI inputs support 4K @ 60Hz, 8-bit 4:2:0).
I didn’t find this information in the TV settings. I tested the GTX 970 on all HDMI ports and I didn’t notice difference in image quality. Actually there is a big improvement in image quality when I set 4k @ 30Hz in NVIDIA control panel. That’s why I have some doubts about what chroma subsampling ratio is used in 4k @ 60Hz because the image is very slightly degraded compared to 30Hz…
References
- HDMI @ wikipedia
- HDMI 2.0
- HDMI 2.0 released: 18Gbps of bandwidth allowing for 4K @ 60 fps, 32 audio channels
- DisplayPort @ wikipedia
- NVIDIA Kepler Cards Get HDMI 4K@60Hz Support (Kind Of)
GeForce GTX 970 | Review and testing of video cards NVIDIA
NVIDIA, having presented the new Maxwell microarchitecture in the face of the GTX 750 and GTX 750Ti entry-level video cards, did not delay the release of more powerful products too much.
On September 19, 2014, two new items were released at once — GeForce GTX 980 and GeForce GTX 970. Today we will talk about the last «younger» model.
The reference sample of the video card has the already familiar design of top products, a striking sign of which is a spectacular cover made of magnesium alloy.
At the heart of the new video card lies the GM204 graphics chip, manufactured using 28nm technology. The Maxwell graphics architecture, named after the famous mathematician James Clark Maxwell, is already the 10th in a series of NVIDIA products. Compared to the previous Kepler architecture, the performance per watt has almost doubled. If we look at the power consumption of the previous model GeForce GTX 770, which, logically, is being replaced by a new one, we will see a serious advantage of the GeForce GTX 970 — 145W vs 230W. The power supply recommended by the manufacturer must be at least 500 watts.
The video card has five video outputs. The interface panel houses DVI-I (Dual-Link) connections, three DisplayPort 1.
2 and full-length HDMI. The model in question is the first to support HDMI 2.0. The new video output specification will allow you to display a picture with a resolution of 4K and a refresh rate of 60 Hz.
Specifications GeForce GTX 970
| Chip code name | GM204 |
| Architecture | Maxwell |
| Process | 28 nm |
| Number of transistors | 5.2 billion |
| GPU clock speed, MHz: base / Boost | 1050 MHz/1178 MHz |
| Texture blocks | 104 |
| Universal processors | 1664 |
| ROPs | 64 |
| Video memory type | GDDR5 |
| Video memory size | 4096 MB |
| Bus width, bit | 256 |
| Memory frequency, MHz: | 1750 |
| Interface | PCI Express 3. 0 |
| Power input | 145 W |
Game testing* (number of FPS)
| Games/Settings | Ultra 1920×1080 px | Ultra 2560×1600 px |
| The Witcher 3: Wild Hunt | 50fps | 34fps |
| GTA 5 | 44fps | 30fps |
| Battlefield 4 | 72 fps | 42fps |
| Metro: Last Light | 42fps | 41fps |
| Crysis 3 | 43fps | 23fps |
| GRID 2 | 119 fps | 80fps |
| Skyrim | 133fps | 101fps |
| Tomb Raider 2013 | 74fps | 40fps |
*The following bench configuration was used for testing: Intel Core i5-6600 processor, ASUS Maximus VIII Extreme motherboard, 16 GB G.
Skill RAM, Plextor PX-256M6Pro SSD, Corsair AX1500i power supply, Windows 10 operating system (64 Bit). NVIDIA GeForce driver version: 375.95.
So, in general, acquaintance with the GeForce GTX 970 makes a fairly good impression. It remains to add that the starting price from the manufacturer is $329, which is significantly lower than the previous GTX 770. And this makes the new model a very attractive product in the video card market.
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3DNews Technologies and IT market. NVIDIA GeForce GTX 9 graphics card news00 can experience The most interesting in the reviews
03.10.2014 [01:15], Alexey Stepin This news is unlikely to please those who have already purchased or are about to purchase one of the new NVIDIA graphics cards based on the GM204 processor. Yes, the GeForce GTX 980 is the undisputed leader today, yes, the GeForce GTX 970 demonstrates the best ratio of price, performance and heat dissipation, but it seems that the problem that we will touch on in this article really exists.
30 Hz: everything is fine In 30 Hz mode, magnified text looks normal. Only the usual results of the font smoothing algorithm are visible. This is how “honest RGB” should look like, where the color (chroma) component has the same resolution as the luminance (luma). 60Hz: Color Coding Artifacts
Here’s an example of one user experiencing chroma issues in 4K @ 60Hz. Nothing similar is observed in the 30 Hz mode. Moreover, Samsung confirms that its panel supports 4:4:4 color coding (honest RGB) at 60 hertz. It seems that we are talking about some kind of problem with HDMI 2.0 support, and clearly on NVIDIA’s side. Whether this is a software problem, or under the guise of supporting version 2. This is how the color component is encoded in various formats Many also report that the GeForce GTX 900 makes audible sounds under load — the inductors squeak in the power subsystem, and the problem is not localized by one manufacturer and occurs in products from at least three companies: ASUS, EVGA and MSI. Gigabyte G1 models, however, do not demonstrate this problem and behave quietly, so this is hardly NVIDIA’s fault. Rather, we can talk about insufficient quality control on the part of mass-produced graphics card manufacturers. But the problem with the implementation of HDMI 2.0 looks much more serious. We invite owners of GeForce GTX 980 or 970 to share their experience in this area, whatever it may be, negative or positive. 
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Many owners of the new cards wishing to use them with a 4K (3840 × 2160) panel suddenly encountered a number of difficulties, and now the official NVIDIA forums are bombarded with messages like “I can’t use 4K @ 60 Hz mode” or “I can’t achieve 4:4:4 color mode on a Samsung TV. 
0 in new products, only version 1.4 of the HDMI interface is implemented, it is not yet clear. But the number of reports of such problems is already alarming. You can check the correctness of the coding of the color component using this image by opening it in full size. All risks must be clearly visible, color halos must be absent. 