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7990 or 290 Crossfire, which would you choose?

Soldato
Joined
18 Oct 2002
Posts
7,635
Location
Sutton Coldfield, Birmingham
Right i'm messing around with my systems and left over mining gear.

I currently have two 7990s under water in my main gaming system however quadfire is horrid and has never properly worked (which I knew anyway). I also don't have the funds to spend £1000+ on a 6 core Intel CPU and monitor setup to properly make use of it so I tend to game with a single 7990, leaving the 2nd 7990 doing nothing.

Both 7990 cards clock to 1200 core and 1700 memory but that's the limits.

I also have three reference 290 cards in another system however I believe that running 2 of these in crossfire would be quicker and offer better results than a single 7990 due to hardware frame pacing. Plus the general better specs of the 290 (TrueAudio, etc) compared to the 7990 keep putting naughty thoughts into my head.

If I did swap everything around i'd end up water cooling the 290 cards to keep temps and noise down while hopefully improving the clocks.

Question is, is this all worth it? I have SuperWide monitor so not running 4k levels of quality. I do game a lot, mostly BF4, and prefer to run things medium/high just to get smoother fps. I have access to a 120Hz monitor as well.

I'd have to drain the loop, sell the 7990s for what, £400. Then either buy 290 blocks straight away and install the setup or run them on air for a while before going down the water route.

Can anyone provide any proper evidence of 290s in crossfire and what they are capable of?

Also since I know quadfire doesn't work, would an overclocked 4770k cope with 290 trifire?
 
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Cheers Matt

I know you made a similar move, any regrets?

Just knowing that core for core the 290 are faster GPUs is bugging me, especially when they are sitting in my work PC mining when I could be gaming on them.

Forgot to say my 7990s (or one of them) has horrid coil whine though, I guess that might put people off buying them :(
 
Just to say that the 14.6 drivers make a massive difference to my pair of (blocked) 7990s performance under crossfire - i.e. it's actually usable!

What CPU are you using? I can only get my 4770k at 4.4GHz stable it seems and with both cards in crossfire I get horrid FPS. Not that i'm complaining as a single card works ok but i've just got an itch. This is with BF4 btw, I don't really play much else.

My difficulty is... two 7990s are overkill and simply don't work for me. One 7990 is ok but why use that when I have 3x 290 which I could either split and run crossfire or (be stupid again) and run trifire.

Either way everything will be under water.
 
Have you tried quadfire on BF4 yet, both DX11 and Mantle work very well with it.

The latest drivers have some good improvements for 4 way setups, Crysis 3 is another game that works well.

Here is another bench I just ran using quadire I have just posted in another thread.

Just messing around hence the low CPU clockspeed and this popped out.

4 x 290Xs @1230/1500

4930k @4.0

Ab3lS12.jpg

Have tried. Quadfire with my 4770k at 4.5GHz and the system chugs along at 30-40fps in Battlefield 4. Thats with both Mantle and DX11 so something must be up with my setup.

You have 2 7990s with a 8320? Disgusting :P

The 8320 was bought as I fancied having both an AMD and Intel setup. Originally the 8320 was used with my 7990s but since then i've bought a 4770k so switched the systems around.

The three 290s and the 8320 were my work system and the 290s were just mining 24/7 hence we wondering what would offer the better performance.

290's for performance and the 7990's for E-peen

The 7990s are gorgeous but i'm after performance here!

I drained my loop last night and have taken the 7990s out and replaced them with 2 290s, with the third sitting next to me.

Will do some testing later
 
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