It's the Acer K272HUL 6ms GTG which has an AHVA panel- which is a form of IPS I think. I came from Dell 21.5" IPS panels (1080p) so not a big deal. The switch from 21.5->27 and 1080->1440 is SUPER noticeable though!
Nice!
Games I play are BF3, BF4, LoL, SC2.
LoL => R9 380 (similar to your 7950) gets > 100 fps at 4K.
http://www.computerbase.de/2015-07/grafikkarten-benchmarks-cs-go-dota-2-lol-wot-wow-ultra-hd/3/
I cannot readily find new SC2 benchmarks but looking at DOTA 2, Heroes of the Storm, Diablo 3, again not a problem for a GTX970/390 level card at 4K, which means 7950 CF should slice through them easily:
http://www.computerbase.de/2015-07/grafikkarten-benchmarks-cs-go-dota-2-lol-wot-wow-ultra-hd/2/
BF3 isn't a problem either - HD7990 is faster than your cards but it's flying:
BF4, if you overclock your 7950s to 1050mhz each, you should = HD7990 in performance.
I'm sure O/Cing crossfire is asking for issues though. :hmm:
Not necessarily. As long as each GPU is stable, they would both be stable in CF.
The beauty of the 7950 was that it could overclock to match/beat GTX680/HD7970Ghz. 1.225-1.256V on the 7950 on Gigabyte Windforce, MSI TwinFrozr III (with dual 8-pin connectors), Sapphire Dual-X 7950, and HIS IceQ2 7950 produced massive overclocks: 1125-1250mhz (!)
http://www.legionhardware.com/artic...z_edition_7950_iceq_xsup2_boost_clock,13.html
Next question - assuming that I got a 970/980/390. Is there a difference between crossfire/SLI - in that is one less problematic than the other?
If you play a lot of GameWorks titles, it's better to get an NV card for SLI as they have day 1 profiles. If you play mostly brand agnostic titles, most of those have CF profiles ready too. Generally speaking, modern day CF with today's cards has better scaling and huge bang-for-the-buck.
What makes your question difficult to answer is because in some games CF > SLI, in others SLI > CF. You'd have to look up specific games and frame times.
For example, BF4:
You should look at some reviews like this one:
http://www.sweclockers.com/test/20216-nvidia-geforce-gtx-titan-x-i-sli/5#content
or this one:
http://www.techspot.com/review/1033-gtx-980-ti-sli-r9-fury-x-crossfire/
Also is this something that they continue to try to improve on or more like it is what it is?
Ya, both companies work hard to get game profiles ready.
I'm hoping if I was getting by on one of these cards and needed more HP - once the new stuff comes out people might dump their old cards on the cheap and I could SLI or CF assuming it worked.
Based on the games you described though, it sounds like unless you plan on playing more demanding games, if new drivers removed the glitches/artifacts and you can overclock your 7950s, perhaps there is less urgency to upgrade. Chances are your 7950s are close to the bottom on the resale value scale. If say you can sell them for $100 a piece, in 12 months, you can probably sell them for $60-70 a piece of $60-80 less. However, chances are the price drop on existing cards will be FAR greater than $60-80 per each card. For example, Fury/Fury X are $550-650, 980Ti is $610-700, GTX980 is $470 without sales, R9 390X is $380. In 12 months from now, a lot of these cards will lose a lot of their value once 16nm HBM2 GPUs launch. It wouldn't be surprising if 980Ti's used resale value was $375-400 by Sept 2016.
I mean if you sell the 7950s now, you can get a single 390 for
$270 for example. The decision to CF/SLI rests more on the types of games you play most.
Another alternative is: (1) sell 7950s --> (2) buy stop gap 970/390/980 --> (3) sell stop-gap 970/390/980 and buy a 16nm HBM2 faster single GPU and skip SLI/CF entirely.
In looking at the charts - the 7950 is pretty much equivalent to the 280x right?
An 800mhz stock 7950 is about 30% compared to a 280X at your resolution. It will take about an
1100mhz 7950 to match a 280X, and
2 of those will be at least as fast as an HD7990. A 7990 roughly = 980.
That means if you get a 390/970, it should roughly equal your stock HD7950 CF, and a 980 should roughly equal your overclocked 7950 CF.