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[Rage3D] 4870X2 Quad CF review

post #1 of 13
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I love Rage3D, they don't sugar coat anything, even being Pro ATI.

Source





Quote:
Closing thoughts on QuadCF, Micro-stuttering, and other things

Neat trip this has been, hopefully enjoyable for those in front of the screen as well. We've seen that most of the time (FarCry 2, Call of Duty World at War, Fallout 3) a single X2 will suffice even when using high IQ settings. However, we were met with situations where QuadCF was required to provide a good, solid experience (Stalker Clear Sky, World at War with Edge-Detect resolve filter), and even had a case where AFR was actually a liability (Dead Space). What this comes to prove is that QuadCF can make sense, under certain conditions, but it's not a solution that should be in every PC under the sun: get it if you play at demanding settings and lavish resolutions, otherwise you risk being disappointed.
Quote:
Micro-Stuttering

On the topic of micro-stuttering, no truly outstanding revelation came ... or, at least, none should've come for those that avoided the pitfalls of extremism (saying it does not exist versus saying it eats baby kittens for breakfast). It does, in the strictest sense, exist. It can be a true deterrent from a good gameplay experience ... however, the cases when that happens are already plainly bad: you need to be performance choked in order for the bulk of inter-frame deltas to shift towards being greater than 25 ms, which is the truly obnoxious zone. So, technically, if you're at 20 FPS due to rendering constraints, and not some sort of framerate cap, on a dual-GPU solution (as noted, queuing more frames will reduce the amplitude of the n-n+1 frame transition), micro-stuttering will be a big problem, but being at 20 FPS is a far greater problem in itself. Where would a single GPU solution be? Low teens? We'd like to reiterate that, if you're in that zone with a high-end single-GPU, going multi-GPU won't save you: don't do it, you'll just frustrate yourself.

The only solutions at that point involve either waiting for a new generation of GPUs, or adjusting your settings until you find a sweet spot (assuming that the bad performance isn't due to a bug). But if you're doing well with a single-GPU, and want more ... why fear multiple GPUs? We've seen that once performance is good, it becomes a non-issue. So whilst it would be trendy to complain about the absconded nature, and inherent absolute evil of micro-stuttering, we can't do so in good faith ... like all other things, it must be qualified, and you must understand how it works, and when it could affect you.


Edited by grunion - 12/27/08 at 10:33pm
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post #2 of 13
So this is a diver review and not a card review? Might want to mention that in the title.
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post #3 of 13
Thread Starter 
Quote:
Originally Posted by Slightly skewed View Post
So this is a diver review and not a card review? Might want to mention that in the title.

Seeing as the source link is 4870X2 Quad CF, the title is fine.

Thank you for the suggestion though.
You may now carry on with your night.
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post #4 of 13
nice review.....you know i was contemplating on getting another X2 but knowing the fact that my cpu would bottleneck them i even thought about buying the QX9650.......so i was about to spend some $900 for some pathetic 10FPS increase .........after reading this review i don't really want to anymore
    
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post #5 of 13
Quote:
Yes, finally, we have exposed the evil ... now, we can retire in glory! As per the initial assumption, QuadCF does better with regards to micro-stuttering ... it does excellently, actually, with more than 90% of the measured deltas being smaller than 20ms, out of which 85% are lower than 5ms (within the measurement margin of error). However, the X2 handles itself in a less stellar fashion, with about 15% of the measured deltas being greater than 20ms ... not horrid (we're sidestepping, duh!), but also not necessarily likeable, depending on ones sensitivities.
So adding a second 4870X2 actually helps reduce microstutter without the need for v-sync? I wonder if the GTX295 exhibits the same behavior.

I'm starting to feel more confident about these dual-gpu cards.
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post #6 of 13
Quote:
Originally Posted by arkheii View Post
So adding a second 4870X2 actually helps reduce microstutter without the need for v-sync? I wonder if the GTX295 exhibits the same behavior.

I'm starting to feel more confident about these dual-gpu cards.
doubtfull.....

the 295 is dual pcb with an internal bridge & thats bound to cause a slight stutter!!, the x2 has both the GPUs on the same board...
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post #7 of 13
Quote:
Originally Posted by grunion View Post
I love Rage3D, they don't sugar coat anything, even being Pro ATI.

Source

the chart you posted is a 4870 evaluation and not really pertinent to the review.
a very good review,clears misconceptions about MS and shows that having 4 gpus might actually reduce MS.i found this interesting,almost 100% scaling in cod WaW with 24xAA and almost 80% in stalker clear sky with AA.

    
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post #8 of 13
I get better than that in Fallout 3. Not sure exactly how much because I have vsinc at 60fps and that's where it's at most of the time. Can't compare to other games because I don't have them, but maybe this is the only one. Weird thing is I remember seeing it at around 80fps on another site, I just forget where.
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post #9 of 13
Quote:
Originally Posted by Adrienspawn View Post
I get better than that in Fallout 3. Not sure exactly how much because I have vsinc at 60fps and that's where it's at most of the time. Can't compare to other games because I don't have them, but maybe this is the only one. Weird thing is I remember seeing it at around 80fps on another site, I just forget where.
Single or Dual GTX260s? Because 4870X2 is better in Fallout 3 then GTX295
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