NVIDIA's take on AMD's under documented free sync

Subject: General Tech | January 8, 2014 - 01:20 PM |
Tagged: tom petersen, nvidia, g-sync, free sync, CES 2014, amd

AMD's free sync has been getting a lot of well deserved attention at this years CES, Ryan had a chance to see it in action if you haven't checked out his look at AMD's under reported and under utilized feature.  AMD missed an opportunity with this technology which NVIDIA picked up on with their G-Sync.  NVIDIA has responded to The Tech Report's comments from yesterday, Tom Petersen stated that while free sync may be an alternative on laptops, desktop displays are a different beast.  They utilize different connections and there is generally a scaler chip between the GPU and the display.  Read his full comments here.

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"AMD demoed its "free sync" alternative to G-Sync on laptops. Desktop displays are different, Nvidia says, and they may not support the variable refresh rate tech behind AMD's solution—at least not yet."

Here is some more Tech News from around the web:

Tech Talk

PCPer Live! NVIDIA G-Sync Discussion with Tom Petersen, Q&A

Subject: Graphics Cards, Displays | October 20, 2013 - 02:50 PM |
Tagged: video, tom petersen, nvidia, livestream, live, g-sync

UPDATE: If you missed our live stream today that covered NVIDIA G-Sync technology, you can watch the replay embedded below.  NVIDIA's Tom Petersen stops by to talk about G-Sync in both high level and granular detail while showing off some demonstrations of why G-Sync is so important.  Enjoy!!

Last week NVIDIA hosted press and developers in Montreal to discuss a couple of new technologies, the most impressive of which was NVIDIA G-Sync, a new monitor solution that looks to solve the eternal debate of smoothness against latency.  If you haven't read about G-Sync and how impressive it was when first tested on Friday, you should check out my initial write up, NVIDIA G-Sync: Death of the Refresh Rate, that not only does that, but dives into the reason the technology shift was necessary in the first place.

G-Sync essentially functions by altering and controlling the vBlank signal sent to the monitor.  In a normal configuration, vBlank is a combination of the combination of the vertical front and back porch and the necessary sync time.  That timing is set a fixed stepping that determines the effective refresh rate of the monitor; 60 Hz, 120 Hz, etc.  What NVIDIA will now do in the driver and firmware is lengthen or shorten the vBlank signal as desired and will send it when one of two criteria is met.

  1. A new frame has completed rendering and has been copied to the front buffer.  Sending vBlank at this time will tell the screen grab data from the card and display it immediately.
  2. A substantial amount of time has passed and the currently displayed image needs to be refreshed to avoid brightness variation.

In current display timing setups, the submission of the vBlank signal has been completely independent from the rendering pipeline.  The result was varying frame latency and either horizontal tearing or fixed refresh frame rates.  With NVIDIA G-Sync creating an intelligent connection between rendering and frame updating, the display of PC games is fundamentally changed.

Every person that saw the technology, including other media members and even developers like John Carmack, Johan Andersson and Tim Sweeney, came away knowing that this was the future of PC gaming.  (If you didn't see the panel that featured those three developers on stage, you are missing out.)

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But it is definitely a complicated technology and I have already seen a lot of confusion about it in our comment threads on PC Perspective.  To help the community get a better grasp and to offer them an opportunity to ask some questions, NVIDIA's Tom Petersen is stopping by our offices on Monday afternoon where he will run through some demonstrations and take questions from the live streaming audience.

Be sure to stop back at PC Perspective on Monday, October 21st at 2pm ET / 11am PT as to discuss G-Sync, how it was developed and the various ramifications the technology will have in PC gaming.  You'll find it all on our PC Perspective Live! page on Monday but you can sign up for our "live stream mailing list" as well to get notified in advance!

NVIDIA G-Sync Live Stream

11am PT / 2pm ET - October 21st

PC Perspective Live! Page

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We also want your questions!!  The easiest way to get them answered is to leave them for us here in the comments of this post.  That will give us time to filter through the questions and get the answers you need from Tom.  We'll take questions via the live chat and via Twitter (follow me @ryanshrout) during the event but often time there is a lot of noise to deal with. 

So be sure to join us on Monday afternoon!

PC Perspective Live Review Recap: NVIDIA GeForce GTX 680

Subject: Graphics Cards | March 24, 2012 - 05:51 PM |
Tagged: video, tom petersen, nvidia, live review, gtx 680, geforce

On the day of the GeForce GTX 680 launch, we hosted a "Live Review" to discuss the new product features and performance while also taking questions from a live chat room and via Twitter.  NVIDIA's own Tom Petersen stopped by the offices to talk with us and to show off the hardware features with some live demos of GPU Boost, overclocking and quite a bit more.

If you haven't seen the video yet, you should definitely do so; Tom does a great job explaining the new technology involved with the Kepler GPU.  One caveat: the recording process was a bit off and the recording actually starts just a few minutes AFTER we actually began the live stream.  Sorry!

For more information on other upcoming events you can follow PC Perspective on Twitter, Facebook or Google+ or just check http://pcper.com/live for the latest schedule!