The V4900 is for all practical purposes a GDDR5 Radeon HD 6670 when it comes to hardware, running at the same 800MHz core clock and 1GHz (4GHz data rate) memory clock as its consumer counterpart. Since AMD keeps fewer FirePro cards than they do desktop Radeon cards, only a single variant of Turks will be launching as a FirePro card. All of these features will be available in the V4900, and in spite of these improvements Turks still comes within a few watts of Redwood’s power budget, making the Turks based V4900 a drop-in replacement for the Redwood based V4800. Turks also brought with it the rest of feature improvements we saw with the Northern Islands GPUs: primarily support for DisplayPort 1.2 and color calibration in linear space, while UVD 3 is also present for video decoding purposes. With respect to performance Turks moves from 5 SIMDs (400 SPs) to 6 SIMDs (480 SPs), which gives it an immediate 20% compute and texture advantage over Redwood at the same clocks.

As you may recall from Turks’ desktop launch, Turks improves on Redwood in a few different ways. In May of this year we saw the introduction of the Cayman based FirePro V7900 and V5900, and now just a bit over 6 months after the Turks based Radeon 65 launched, Turks is getting the professional graphics treatment with the FirePro V4900.Īs Turks was designed to replace the older Redwood GPU, so too is the FirePro V4900 designed to replace the FirePro 3D V4800 (AMD has dropped the 3D moniker). Nowhere is this more evident than their professional graphics lineup, where consumer desktop video cards have transitioned over to professional products at almost 6 months on the dot. It's totally baffling to me why the presence of the second monitor on the extended desktop stabilizes things and I have no idea whether the new video card or the new display is to blame (or both, I guess).For the last couple of years AMD has been pretty consistent about cascading their GPUs through their entire product line. It happens most when there's quick action happening on screen, like mousing quickly back and forth over Google search results which makes the underline jump off and on. Either way, once the 20' isn't part of the desktop, I get an intermittent and very annoying display flicker. Finally, I just disabled the second screen (I've tried a couple things: disable it in the AMD control panel, or unplug it from the video card). Still connected to the video card, still part of the extended desktop (so the mouse could move over to the off screen), and everything was solid. Then I wasn't using the second screen much so I turned it off. Originally I set this up in a dual-monitor config, with the 27' as the primary and the old 20' as the secondary. The FirePro and the 27' Dell are both new.

Amd firepro w4100 second monitor