8800GTS to 4870? - Page 3 - Overclock.net

TheProfiteer · 11-07-08

Quote:

Originally Posted by Choggs396

There is no way Vsync can improve your actual frame rate unless there is some sort of weird glitch (something wrong) with the game itself. Even then it wouldn't really be Vsync itself improving performance, it would be a glitch reducing performance.

No card "really likes" VSync turned on, based on the model. That makes no sense. Vsync merely puts frame rates down to your monitor's refresh - which has nothing to do with any specific model card.

I dont know man so far my experiments have gone towards the way of getting higher FPS with VSYNC turned on these 3 games.

mind you this is only true for my HD4850, my previous card a 9600GT, halted to an absolute stop with VSYNC turned on.

FarCry2
Fallout 3
Dead Space.

I dont understand it either man, but for some reason I am getting higher frames with the added bonus of no screen tearing (Which I get a whole lot in dead space) with VSYNC on, I have no idea why.

Choggs396 · 11-07-08

Quote:

Originally Posted by TheProfiteer

I dont know man so far my experiments have gone towards the way of getting higher FPS with VSYNC turned on these 3 games.

mind you this is only true for my HD4850, my previous card a 9600GT, halted to an absolute stop with VSYNC turned on.

FarCry2
Fallout 3
Dead Space.

I dont understand it either man, but for some reason I am getting higher frames with the added bonus of no screen tearing (Which I get a whole lot in dead space) with VSYNC on, I have no idea why.

If you're video card is outputting less than your monitor's refresh rate, Vsync can actually reduce the framerate (to even lower than the refresh rate)... but it won't improve it; that's just not how it works.

A good read at [H]ard|Forum:

Quote:

Let's say you're playing the sequel to your favorite game, which has better graphics. You're at 75Hz refresh rate still, but now you're only getting 50FPS, 33% slower than the refresh rate. That means every time the monitor updates the screen, the video card draws 2/3 of the next frame. So lets track how this works. The monitor just refreshed, and frame 1 is copied into the frame buffer. 2/3 of frame 2 gets drawn in the back buffer, and the monitor refreshes again. It grabs frame 1 from the frame buffer for the first time. Now the video card finishes the last third of frame 2, but it has to wait, because it can't update until right after a refresh. The monitor refreshes, grabbing frame 1 the second time, and frame 2 is put in the frame buffer. The video card draws 2/3 of frame 3 in the back buffer, and a refresh happens, grabbing frame 2 for the first time. The last third of frame 3 is draw, and again we must wait for the refresh, and when it happens, frame 2 is grabbed for the second time, and frame 3 is copied in. We went through 4 refresh cycles but only 2 frames were drawn. At a refresh rate of 75Hz, that means we'll see 37.5FPS. That's noticeably less than 50FPS which the video card is capable of. This happens because the video card is forced to waste time after finishing a frame in the back buffer as it can't copy it out and it has nowhere else to draw frames.

Essentially this means that with double-buffered VSync, the framerate can only be equal to a discrete set of values equal to Refresh / N where N is some positive integer. That means if you're talking about 60Hz refresh rate, the only framerates you can get are 60, 30, 20, 15, 12, 10, etc etc. You can see the big gap between 60 and 30 there. Any framerate between 60 and 30 your video card would normally put out would get dropped to 30.

It's a long read, but the information is pretty good.

Askar1 · 11-07-08

There is no point really. For just COD4 and WoW, an 8800 GTS is good enough. A 4870 would be a little bit of an overkill.

skugpezz · 11-08-08

Quote:

Originally Posted by Askar1

There is no point really. For just COD4 and WoW, an 8800 GTS is good enough. A 4870 would be a little bit of an overkill.

there is no such thing as an overkill.. he will need the power sooner or later..well you have one

brettjv · 11-10-08

The difference in terms of 'playable settings' between an 4870 (512MB, especially) and a 8800GTS512 is basically you get to bump up one or two things a notch in a given game. Like, you get to go from 0xAA to 2xAA, or MAYBE 4xAA. Or you can bump up the resolution a notch. Or you can bump up both shaders and shadows from 'high' to 'very high'.

That is about the extent of the difference between an 8800GTS512 and a 4870.

Trust me, I have both of them.

I'd say the upgrade benefit is worth no more than $100, net cost, unless money isn't a huge issue to you.

Just my $.02. And if you're gonna make this move, at least get the 1GB version of the 4870.

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8800GTS to 4870?

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