Woah, that was very thorough. I certainly understand it a lot more. Thanks for the awesome post!
What are we looking at in terms of price for the 6950? I might consider building a Windows 8 rig when the time comes.
You're welcome.
Price range for a 6950 is $280-$340 depending on retailer / stock or reference cooling.
stock cooling:
(Can't go wrong with Sapphire)
Sapphire Radeon HD6950 2GB [SAPH-HD6950] - $279.00 : PC Case Gear
Aftermarket cooling (much quieter and runs cooler)
(Great cooling,
very quiet. I have the 580 version. Worth the 3 slots for noise. Very hard to Crossfire however)
ASUS Radeon HD6950 DirectCU II 2GB [EAH6950-DCII-2GD5] - $329.00 : PC Case Gear
(Apparently loud at high fan, but it'd be my 2nd choice for aftermarket cooling)
MSI Radeon HD6950 2GB Twin Frozr III PE/OC [R6950TWINFIIIPEOC] - $339.00 : PC Case Gear
List here:
Think hard and research a lot if thinking of going Eyefinity. It's really one of those 'not for everybody' tech. You may love it and use it all the time, or use it until the novelty wears off. It's an entirely personal thing.
I had a x3 24 setup with my 5970 and apart from the odd 'wow, this really adds to it' game, most of the time it pretty much sucked. Non native games need workarounds, some 'supported' titles were generous with the word support. The biggest killer for me however was performance. My single overclocked 5970 just couldn't cut it. I ended up going back to single screen anyway.
Cards/Eyefinity have improved a little since my 5970 - but the performance hit is still considerable and a reason most people crossfire anyway when running Eyefinity.
Imo, the only major drawback to SLI surround is cost. For a 'top shelf' setup you'd need a pair of 3GB 580's at least. VRAM really is a killer with these mega resolutions.
sli is literaly doubling your graphics cards.
No. It's
theoretically doubling performance. Rarely does it actually double the performance.
What? :huh:
Again, crossfire works like SLI.
The maximum is four for both AMD and Nvida. Drivers do not support more than quad CF/SLI be it four individual or two x2 cards.
.
The point of crossfire is
exactly the same as SLI. Increase performance with extra GPU's. It has nothing to do with smoothness.
Ironically, game play can often be
less smooth due to micro-stutteringthat is inherent in multi-GPU technology. Micro-stutter exists with both CF and SLI. It's impact can vary from barely perceptible to
very noticeable hitching. (I didn't realize just how bad micro-stuttering was until I went back to a single GPU).
if you chose to go with a 6970, youl benchmark just under 2 of nvideas best card with sli, but if you double a crossfire and run the drivers right youl be extremely pleased.
Benchmarks are good for a rough guide at best. The majority focus on min/max FPS which isn't the most important aspect. Only a few mention the real important areas such as
average, average minimum and how the game actually
feels to play.
They also don't cover the fact that CF/SLI is more prone to minimum FPS drops than single GPU's.
I had a 5970 - benchmarks, in-game raw FPS were very high. Very impressive. What the nubers
didn't reflect was that real world performance was rubbish. Inconsistent average, a lot more min drops, micro-stutter etc.
Swapped to a single GTX 580 - benchmarks, raw fps are still high, but far from the 5970. Real world performance however is great. Less min drops, higher average, no MS etc. An all round vast improvement over the 5970.
Based on benchmarks alone, the 5970 is a clear winner. Day to day usage though is a completely different story.
Note
BENCHMARKS ARE NOT GOSPEL
your performance would be somewhere in between the gpu of a 6950-6970 and your gddr5 ram added up would equal close to the performance of the 6990.
I'm lost what this could possibly mean. If you are referring to the 6990's 4GB of VRAM and if Crossfiring 2x6950 2GB would give you 4GB useable, then the answer is an emphatic no.
The 6990 is a x2 card, each GPU has it's own 2GB. The VRAM
is not accumulative (it doesn't add up) so you still only have 2GB usable. The same applies to separate cards (and SLI as well).
To be honest, I've had trouble following your posts
I'm not sure if English is your primary language or not. My apologies if it isn't.
Without meaning to be rude, I think you need to do a bit more research on Crossfire and SLI. You're on the right track, but I think your missing a few key fundamentals, or the right terminology which is resulting in you getting the wrong idea about quite a few core aspects to this technology.