Topic Title: R9 270x + R9 290 will it work?
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Created On: 07/08/2014 06:06 AM
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 07/08/2014 06:06 AM
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JHGamer
Peon

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Hi, Im looking to upgrade my PC's gaming performace by buying a new graphics card.. i currently have 2x R9 270's (CrossfireX enabled) and i was wondering if it is possiable to crossfire a R9 290 with and R9 270x?



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Intel Core i7 4790K (OC 4.8GHZ), Asus Maximus VII Ranger Z97, (4x4GB) Corsair Vengeance Pro, 2133MHz, 2x Asus R9 290x 4GB (OC), 1000W Corsair RM Series, x2 480gb SSD, ROG Xonar phoebus sound card

 07/08/2014 09:48 AM
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HoneyBadger84
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Originally posted by: JHGamer Hi, Im looking to upgrade my PC's gaming performace by buying a new graphics card.. i currently have 2x R9 270's (CrossfireX enabled) and i was wondering if it is possiable to crossfire a R9 290 with and R9 270x?

 

Should work, but if you already have 2 270Xs in crossfire, it won't be a really big performance boost to swap one to a R9 290... I mean it'll be noticeable but not mind blowing or anything.

I'd say you're probably better off waiting & seeing if AMD releases a new line of GPUs shortly after NVidia does, which should be Q4 2014/Q1 2015, so in the next 2-7 months... if you don't wanna wait, you could look in to an R9 290X used.  

Just know that Crossfiring any 290-series card with a 270X will gimp the 290 just a bit because you'll be frame-buffer limited by the 270X still (2GB of vRAM vs 4GB on the 290/290X, so you'd still be capped at 2GB if I recall correctly)



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CPU: i7 3930k @ 4.6GHz 1.29V (Corsair H110-cooled) ~ Motherboard: Asus RoG Rampage IV Extreme 
RAM: G.Skill Sniper Gaming Series (4x4GB 2133MHz, CL9) ~ PSU: Corsair AX 1200W ~ Case: Enermax Fulmo GT
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 07/08/2014 01:45 PM
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Earnhardt
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I dont think it will work

R9 270X = Pitcairn(7870)

R9 290 = Hawaii

Just sell the R9 270X's and pick up a R9 290X.

 



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 07/08/2014 02:54 PM
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JHGamer
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I found this: https://answers.yahoo.com/question/index?qid=20140301225325AAAqOIT

It says "It is possible to crossfire 2 GPUs of different architecture such as the R9 290x and the R9 270x." and I should wait for the new releases of AMD's new GPU's and i guess even if the new cards are fairly expensive the R9 series would be cheaper with the new releases all the more reason to wait.



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Intel Core i7 4790K (OC 4.8GHZ), Asus Maximus VII Ranger Z97, (4x4GB) Corsair Vengeance Pro, 2133MHz, 2x Asus R9 290x 4GB (OC), 1000W Corsair RM Series, x2 480gb SSD, ROG Xonar phoebus sound card

 07/08/2014 11:55 PM
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HoneyBadger84
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I've seen people that have running a 290 crossfired with a 7970, so I don't think a 270X with a 290 would be a problem.  However, like I said before, it's going to be less than ideal because of the frame buffer size difference etc.

Also, if you do decide to go that route, make sure you put the 290 as the primary card (top, the one you plug your monitor in to).



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CPU: i7 3930k @ 4.6GHz 1.29V (Corsair H110-cooled) ~ Motherboard: Asus RoG Rampage IV Extreme 
RAM: G.Skill Sniper Gaming Series (4x4GB 2133MHz, CL9) ~ PSU: Corsair AX 1200W ~ Case: Enermax Fulmo GT
GPUs: 3x HIS R9 290X Reference (Core) Editions in TriFire, Max Load Temps: 71C/70C/71C during OC testing :-P

 07/09/2014 12:09 AM
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black_zion
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I agree with Earnhardt, go with a single high powered 290X. No drawbacks of Crossfire.

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 07/09/2014 01:40 PM
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HoneyBadger84
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He's already using Crossfire with 2 270Xs so he's probably well aware of what drawbacks crossfire has for his setup & the games he plays...



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CPU: i7 3930k @ 4.6GHz 1.29V (Corsair H110-cooled) ~ Motherboard: Asus RoG Rampage IV Extreme 
RAM: G.Skill Sniper Gaming Series (4x4GB 2133MHz, CL9) ~ PSU: Corsair AX 1200W ~ Case: Enermax Fulmo GT
GPUs: 3x HIS R9 290X Reference (Core) Editions in TriFire, Max Load Temps: 71C/70C/71C during OC testing :-P

 07/14/2014 11:48 PM
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-rascal-
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I'm surprised nobody....

YOU CANNOT CROSSFIRE R9-270X WITH A R9-290X.

They are based on different architectures. It's been like this since the "non-HD" Radeon days, and it hasn't changed (much) since then.

You can Crossfire a R9-270X with:

  • Another R9-270X
  • R9-270
  • R9-265
  • HD 7870 (GHz or non-GHz Edition)
  • HD 7850

Why? They are all based on the "Pitcairn" chip used on the HD 7800 series. The R9-270X --> R9-265 are essentially rebraned HD 7800 GPU's with minor updates. Think of it as revision 2.

 

You can Crossfire a R9-290X with:

  • R9-295X2 (The dual-GPU card)
  • R9-290X
  • R9-290

Why? Both use the newer GCN 1.1 architecture "Hawaii" Architecture.

 

You can Crossfire a R9-280X with:

  • Another R9-280X
  • R9-280
  • HD 7970 (GHz or non-GHz Edition)
  • HD 7950 (Boost or non-Boost Edition)

Why? Just like the R9-270X and HD 7870, they use the same chip; the "Tahiti" Core. Again, minor changes....revision 2.

 

It's been a while since AMD updated this (they don't have a newer version with the R200 series yet), but have a look at this:

 



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FX-8350 @ 4.8GHz // ASUS Crosshair V Formula 990FX // Sapphire Vapor-X HD 7970 + Dual-X HD 7970 // Thermaltake Frio w/ push-pull (using Antec Formula 7 Nano-Diamond + Cooler Master JetFlo fans) // 8GB (2 X 4GB) G.Skill RipJawsX 2133MHz  // Corsair TX850 850W // Corsair Force GT 120GB SSD (OS) // Kingston V200+ 120GB SSD // WD Caviar Black 1TB // Windows 7 Ult x64



Edited: 07/14/2014 at 11:57 PM by -rascal-
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