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Crossfire different ATI cards

ambision
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Good morning :-)

I have a powercolor hd 7990 and I want to buy an ati R9 280x or an R9 285 card in order to crossfire them on this rig:

Asus sabertooth 990fx rev 2.0
Amd 8350

 

For some reason, the people at AMD told me this:
"Unfortunately you cannot use a HD video card with and R series video card.  Please use this compatibility chart for your crossfire setup: http://support.amd.com/en-us/kb-articles/Pages/Crossfire-Chart.aspx".

 

Well, it seems strange because 

 

a. the 7990 doesn't appear to be in this guide at all  (I know its just 2 7970's on a single pcb)

 

b. I've heard that if the gpu's are from the same architecture or something it should not be a problem

 

So...if it is possible,

 

1. Would it be O.K to use different card manufacturers (like powercolor and ASUS in my  possible future rig)??

2. Also, please infer the right type and power of the psu to do this.

Thanx☺

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Different vendors are fine, but do not get an R9 285. It will not work. And on the PSU side, at least 1000W of 80+ Bronze power. You can CFX them.

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Good morning :-)

I have a powercolor hd 7990 and I want to buy an ati R9 280x or an R9 285 card in order to crossfire them on this rig:

Asus sabertooth 990fx rev 2.0

Amd 8350

 

280X is a 7970, which will work with 7990 in crossfire. However 285 will not work as it is a newer generation chip.

 

http://www.tweaktown.com/articles/5414/amd-radeon-hd-7990-6gb-and-hd-7970-ghz-edition-video-cards-in-crossfirex/index.html

 

Different brands doesn't matter, and I'd suggest a quality 1000W PSU

"Rawr XD"

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The 280x will work but with a 7990 you are already bottlenecked by that AMD FX 8350 processor. Instead of getting another GPU I would say it would be best to upgrade to an Intel platform as then you will actually see all the frame than the 7990 can deliver. http://www.bit-tech.net/hardware/2012/11/06/amd-fx-8350-review/6

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The 280x will work but with a 7990 you are already bottlenecked by that AMD FX 8350 processor. Instead of getting another GPU I would say it would be best to upgrade to an Intel platform as then you will actually see all the frame than the 7990 can deliver. http://www.bit-tech.net/hardware/2012/11/06/amd-fx-8350-review/6

 

This ^^

Main Rig: http://linustechtips.com/main/topic/58641-the-i7-950s-gots-to-go-updated-104/ | CPU: Intel i7-4930K | GPU: 2x EVGA Geforce GTX Titan SC SLI| MB: EVGA X79 Dark | RAM: 16GB HyperX Beast 2400mhz | SSD: Samsung 840 Pro 256gb | HDD: 2x Western Digital Raptors 74gb | EX-H34B Hot Swap Rack | Case: Lian Li PC-D600 | Cooling: H100i | Power Supply: Corsair HX1050 |

 

Pfsense Build (Repurposed for plex) https://linustechtips.com/main/topic/715459-pfsense-build/

 

 

 

 

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7990 + 7950

7990 + 7970

7990 + 280

7990 + 280x

7990 + 7990

 

 

Thats all thats compatible.

The 280x will work but with a 7990 you are already bottlenecked by that AMD FX 8350 processor. Instead of getting another GPU I would say it would be best to upgrade to an Intel platform as then you will actually see all the frame than the 7990 can deliver. http://www.bit-tech.net/hardware/2012/11/06/amd-fx-8350-review/6

^ These.

 

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DangerousNotDell New Parts For Main Rig Build Log, Señor Shiny  I am a beautiful person. The comments for your help. I have to be a good book. I have to be a good book. I have to be a good book.

 

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7990 + 7950

7990 + 7970

7990 + 280

7990 + 280x

7990 + 7990

 

 

Thats all thats compatible.

Source for every possible crossfire compatibility :

http://support.amd.com/en-us/kb-articles/Pages/Crossfire-Chart.aspx

 

 

edit : nothing is said about the 7990. I don't think that means it's not compatible with anything.

Spoiler

 

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^ These.

 

 

 

 

This ^^

 

 

The 280x will work but with a 7990 you are already bottlenecked by that AMD FX 8350 processor. Instead of getting another GPU I would say it would be best to upgrade to an Intel platform as then you will actually see all the frame than the 7990 can deliver. http://www.bit-tech.net/hardware/2012/11/06/amd-fx-8350-review/6

I... um.... how exactly? 990fx will run 4 cards in pcie2.0 x8. And trying to say the difference between 2.0 and 3.0 is noticeable is like saying the extra 1 byte of storage on a hdd is worth 10£.

 

 

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I... um.... how exactly? 990fx will run 4 cards in pcie2.0 x8. And trying to say the difference between 2.0 and 3.0 is noticeable is like saying the extra 1 byte of storage on a hdd is worth 10£.

He didn't mean bandwidth related bottlenecks.

 

He means CPU not being fast enough to allow the MAXIMUM allowed FPS to be as high as Intels counterpart.

Maximums - Asus Z97-K /w i5 4690 Bclk @106.9Mhz * x39 = 4.17Ghz, 8GB of 2600Mhz DDR3,.. Gigabyte GTX970 G1-Gaming @ 1550Mhz

 

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I... um.... how exactly? 990fx will run 4 cards in pcie2.0 x8. And trying to say the difference between 2.0 and 3.0 is noticeable is like saying the extra 1 byte of storage on a hdd is worth 10£.

It has nothing to do with chip set so much as it is to do with the CPU. The FX 8350 OCed is just not powerful enough to feed 2 high end GPUs one is fine but to you are losing out on half your frames. Adding more GPUs with that CPU wont works because the CPU cannot even feed the 7990 you already have.

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Source for every possible crossfire compatibility :

http://support.amd.com/en-us/kb-articles/Pages/Crossfire-Chart.aspx

 

 

edit : nothing is said about the 7990. I don't think that means it's not compatible with anything.

@ambision

Yes, you can. I read about it ages ago.. Let me find the articles...

AMD Radeon HD 7990 6GB and HD 7970 GHz Edition Video Cards in CrossFireX

5414_01_amd_radeon_hd_7990_6gb_and_hd_79

http://www.tweaktown.com/articles/5414/amd-radeon-hd-7990-6gb-and-hd-7970-ghz-edition-video-cards-in-crossfirex/index2.html

Google "7990 Tri Fire" and you can find its been done a lot.

Maximums - Asus Z97-K /w i5 4690 Bclk @106.9Mhz * x39 = 4.17Ghz, 8GB of 2600Mhz DDR3,.. Gigabyte GTX970 G1-Gaming @ 1550Mhz

 

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Nice! 

 

Pretty weird "old" beastly setup.

Yeah, 7990 + 7970 Beats a Titan. (Obviously more heat/power required) but yeah... still impressive results.

@ambision

Maximums - Asus Z97-K /w i5 4690 Bclk @106.9Mhz * x39 = 4.17Ghz, 8GB of 2600Mhz DDR3,.. Gigabyte GTX970 G1-Gaming @ 1550Mhz

 

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What ? 7990 beats a Titan in all games but the most nvidia optimized ones.

I took that info from the link in my last post, looking through the bench's showing the 7990 alone, and Tri-Fired, true, the 7990 goes toe to toe... but TRI-FIRE 7970's, tis really nice :)

Maximums - Asus Z97-K /w i5 4690 Bclk @106.9Mhz * x39 = 4.17Ghz, 8GB of 2600Mhz DDR3,.. Gigabyte GTX970 G1-Gaming @ 1550Mhz

 

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I took that info from the link in my last post, looking through the bench's showing the 7990 alone, and Tri-Fired, true, the 7990 goes toe to toe... but TRI-FIRE 7970's, tis really nice :)

Um the 7990 handedly beats the Titan in all but the most nvidia biased titles. That's why Titan is a full two tiers below the 7990 http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107-7.html

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Why the comparison to a Titan? Why not compare it to 780, 780ti, r9 290 etc. Never understood the obsession with comparing everything to a titan. If were comparing maxed out AA/AF @ 5760x1080 where the vram is needed maybe, otherwise an irrelevent comparison.

My trifire 5970/5870 was pretty beast... until its 1gb/gpu limit rendered it useless.

Main Rig: http://linustechtips.com/main/topic/58641-the-i7-950s-gots-to-go-updated-104/ | CPU: Intel i7-4930K | GPU: 2x EVGA Geforce GTX Titan SC SLI| MB: EVGA X79 Dark | RAM: 16GB HyperX Beast 2400mhz | SSD: Samsung 840 Pro 256gb | HDD: 2x Western Digital Raptors 74gb | EX-H34B Hot Swap Rack | Case: Lian Li PC-D600 | Cooling: H100i | Power Supply: Corsair HX1050 |

 

Pfsense Build (Repurposed for plex) https://linustechtips.com/main/topic/715459-pfsense-build/

 

 

 

 

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Why the comparison to a Titan? Why not compare it to 780, 780ti, r9 290 etc. Never understood the obsession with comparing everything to a titan. If were comparing maxed out AA/AF @ 5760x1080 where the vram is needed maybe, otherwise an irrelevent comparison.

My trifire 5970/5870 was pretty beast... until its 1gb/gpu limit rendered it useless.

Only stated the Titan cos it goes up against the Titan as the Primary competitor for the 7990 in that particular link a few posts ago.

Maximums - Asus Z97-K /w i5 4690 Bclk @106.9Mhz * x39 = 4.17Ghz, 8GB of 2600Mhz DDR3,.. Gigabyte GTX970 G1-Gaming @ 1550Mhz

 

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No the GTX 690 is the primary competition to the HD 7990.

That may very well be...

 

Missing the point.

Only reason I said the damn Titan word is because IN THAT REVIEW it's on the list with comparable results.

The GTX 690 isn't in the list so it never got a mention, as I would have if it were the case.

 

7990 users would be pretty happy knowing how cheap the 7970's are these days :)

Maximums - Asus Z97-K /w i5 4690 Bclk @106.9Mhz * x39 = 4.17Ghz, 8GB of 2600Mhz DDR3,.. Gigabyte GTX970 G1-Gaming @ 1550Mhz

 

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Only stated the Titan cos it goes up against the Titan as the Primary competitor for the 7990 in that particular link a few posts ago.

I see your point. I retract my statement.

Main Rig: http://linustechtips.com/main/topic/58641-the-i7-950s-gots-to-go-updated-104/ | CPU: Intel i7-4930K | GPU: 2x EVGA Geforce GTX Titan SC SLI| MB: EVGA X79 Dark | RAM: 16GB HyperX Beast 2400mhz | SSD: Samsung 840 Pro 256gb | HDD: 2x Western Digital Raptors 74gb | EX-H34B Hot Swap Rack | Case: Lian Li PC-D600 | Cooling: H100i | Power Supply: Corsair HX1050 |

 

Pfsense Build (Repurposed for plex) https://linustechtips.com/main/topic/715459-pfsense-build/

 

 

 

 

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That may very well be...

 

Missing the point.

Only reason I said the damn Titan word is because IN THAT REVIEW it's on the list with comparable results.

The GTX 690 isn't in the list so it never got a mention, as I would have if it were the case.

 

7990 users would be pretty happy knowing how cheap the 7970's are these days :)

Well it's to bad they are not making the 7970s anymore. They are now 280x.

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Well it's to bad they are not making the 7970s anymore. They are now 280x.

Yeah... Ebay is pretty hit n miss with non-miner 7950/7970 cards too.

But they ARE cheap, and plenty available..the usual 'risk vs reward' comes into play.

Maximums - Asus Z97-K /w i5 4690 Bclk @106.9Mhz * x39 = 4.17Ghz, 8GB of 2600Mhz DDR3,.. Gigabyte GTX970 G1-Gaming @ 1550Mhz

 

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Yeah... Ebay is pretty hit n miss with non-miner 7950/7970 cards too.

But they ARE cheap, and plenty available..the usual 'risk vs reward' comes into play.

They are cheap because they have probably been abused from mining 24/7 for god know how many days or years in a row. I would never buy anything off of flea bay it just seems so jankey.

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