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how good is crossfire? can these crossfire?

post #1 of 25
Thread Starter 
Info:
AMD phenom II X4 3.1 ghz
64gb Crucial m4 SSD
soon 1 TB WD cavier green
16Gb DDR3 RAM
XFX Radeon hd 5770
Hanns-g 21" 16**x1050 monitor

Question:
My question is as the title states how good is crossfire? I have the 1 5770
what would be the bonus' of getting another 5770, vs simply upgrading to a 6770. also could I cross fire a 5770 with a 6770?
Question is b/c next month Elder Scrolls: Skyrim comes out and bethesda has yet to release system requirements! baaasmiley.gif I want to make sure I can run it on max settings.
     
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AMD Phenom II X4 840@3.8Ghz Biostar A870U3 Power Cooler 6970 4x4Gb G.skill ribjaw 
Hard DriveHard DriveOptical DriveCooling
WDCaviar Black 500GB Crucial M4 64GB Sony Optiarc CD/DVD Burner 2x200mm fans 
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Antec kuhler H20 620  2x120mm fans push/pull Win7 Pro 64bit LG 24" 1080p + Dell 23" 1080p 
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GIGABYTE GK-K6800  COOLER MASTER GX 650W COOLER MASTER HAF 922 Tt esports Saphira 
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post #2 of 25
The problem is the 5000 series had terrible scaling, i'd probably sell that and go with a 6000 series or a GTX560ti
post #3 of 25
Well, considering there is little performance difference between a 5770, and a 6770, I wouldn't consider that an "upgrade". You would be better off selling the 5770, and getting something like a 6870, or 6950 if you can afford it.

5770 crossfire does perform nicely, I'm just not sure how well it will scale with a phenom II x4 running at 3.1ghz.
post #4 of 25
Quote:
Originally Posted by anubis1127;15291190 
Well, considering there is little performance difference between a 5770, and a 6770, I wouldn't consider that an "upgrade". You would be better off selling the 5770, and getting something like a 6870, or 6950 if you can afford it.

5770 crossfire does perform nicely, I'm just not sure how well it will scale with a phenom II x4 running at 3.1ghz.

I said a 6000 series, I never mentioned a 6770.

That would be more than just pointless.

Comps
post #5 of 25
Quote:
Originally Posted by remnant;15291144 
Info:
AMD phenom II X4 3.1 ghz
64gb Crucial m4 SSD
soon 1 TB WD cavier green
16Gb DDR3 RAM
XFX Radeon hd 5770
Hanns-g 21" 16**x1050 monitor

Question:
My question is as the title states how good is crossfire? I have the 1 5770
what would be the bonus' of getting another 5770, vs simply upgrading to a 6770. also could I cross fire a 5770 with a 6770?
Question is b/c next month Elder Scrolls: Skyrim comes out and bethesda has yet to release system requirements! baaasmiley.gif I want to make sure I can run it on max settings.

If you don't have plan on higher resolution than what you are running now, adding another 5770 will give you 60-80% more FPS with the same settings as a single 5770. Max settings will depend on the game. If you are talking about Crysis2 (DX11, All Ultra, HR), I won't even be able to hold constant 60FPS with 4GPUs 2GB. Just to give you an idea of what to expect.

You could crossfire with 6770 but it has to be the main rendering card as part of the crossfire setup, not the otherway around. 5770 = 6770 in performance.
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ケンジ
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post #6 of 25
Thread Starter 
yes having a 6870 or 6950 would be awesome however they cost 2-3 times that of a 6770. (lol I'd love to have a 6990 lol)
Umm, It sounds like I could crossfire my 5770 with a 6770 because as you said there isnt much difference. right?

Um what do you mean by scalling?
Compuman145:"The problem is the 5000 series had terrible scaling,"
Anubis1127:"5770 crossfire does perform nicely, I'm just not sure how well it will scale with a phenom II x4 running at 3.1ghz"

Explain as if to someone who has no idea please smile.gif

EDIT:"You could crossfire with 6770 but it has to be the main rendering card as part of the crossfire setup, not the otherway around. 5770 = 6770 in performance. "

how would i make sure its the main rendering card?
     
CPUMotherboardGraphicsRAM
AMD Phenom II X4 840@3.8Ghz Biostar A870U3 Power Cooler 6970 4x4Gb G.skill ribjaw 
Hard DriveHard DriveOptical DriveCooling
WDCaviar Black 500GB Crucial M4 64GB Sony Optiarc CD/DVD Burner 2x200mm fans 
CoolingCoolingOSMonitor
Antec kuhler H20 620  2x120mm fans push/pull Win7 Pro 64bit LG 24" 1080p + Dell 23" 1080p 
KeyboardPowerCaseMouse
GIGABYTE GK-K6800  COOLER MASTER GX 650W COOLER MASTER HAF 922 Tt esports Saphira 
Mouse PadAudio
Tt esports Phyrrsus compact Sennheiser HD 201 
  hide details  
Reply
     
CPUMotherboardGraphicsRAM
AMD Phenom II X4 840@3.8Ghz Biostar A870U3 Power Cooler 6970 4x4Gb G.skill ribjaw 
Hard DriveHard DriveOptical DriveCooling
WDCaviar Black 500GB Crucial M4 64GB Sony Optiarc CD/DVD Burner 2x200mm fans 
CoolingCoolingOSMonitor
Antec kuhler H20 620  2x120mm fans push/pull Win7 Pro 64bit LG 24" 1080p + Dell 23" 1080p 
KeyboardPowerCaseMouse
GIGABYTE GK-K6800  COOLER MASTER GX 650W COOLER MASTER HAF 922 Tt esports Saphira 
Mouse PadAudio
Tt esports Phyrrsus compact Sennheiser HD 201 
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post #7 of 25
Quote:
Originally Posted by compuman145;15291234 
I said a 6000 series, I never mentioned a 6770.

That would be more than just pointless.

Comps

The OP did, not you.
post #8 of 25
Ok Xfire 5770's you'll get about 40% - 50% increase or something, with 2 6850's you'll get closer to 75 - 90% increase in performance.

Comps
post #9 of 25
Thread Starter 
(I keep saying 6770 b/c newegg no longer sells the 5770 I purchased last year)

Umm....... price of one 6770 $90-$110 price of 2 6850' ~$300 I know you mean well but your not really helping answer my question.
     
CPUMotherboardGraphicsRAM
AMD Phenom II X4 840@3.8Ghz Biostar A870U3 Power Cooler 6970 4x4Gb G.skill ribjaw 
Hard DriveHard DriveOptical DriveCooling
WDCaviar Black 500GB Crucial M4 64GB Sony Optiarc CD/DVD Burner 2x200mm fans 
CoolingCoolingOSMonitor
Antec kuhler H20 620  2x120mm fans push/pull Win7 Pro 64bit LG 24" 1080p + Dell 23" 1080p 
KeyboardPowerCaseMouse
GIGABYTE GK-K6800  COOLER MASTER GX 650W COOLER MASTER HAF 922 Tt esports Saphira 
Mouse PadAudio
Tt esports Phyrrsus compact Sennheiser HD 201 
  hide details  
Reply
     
CPUMotherboardGraphicsRAM
AMD Phenom II X4 840@3.8Ghz Biostar A870U3 Power Cooler 6970 4x4Gb G.skill ribjaw 
Hard DriveHard DriveOptical DriveCooling
WDCaviar Black 500GB Crucial M4 64GB Sony Optiarc CD/DVD Burner 2x200mm fans 
CoolingCoolingOSMonitor
Antec kuhler H20 620  2x120mm fans push/pull Win7 Pro 64bit LG 24" 1080p + Dell 23" 1080p 
KeyboardPowerCaseMouse
GIGABYTE GK-K6800  COOLER MASTER GX 650W COOLER MASTER HAF 922 Tt esports Saphira 
Mouse PadAudio
Tt esports Phyrrsus compact Sennheiser HD 201 
  hide details  
Reply
post #10 of 25
Quote:
Originally Posted by remnant;15291320 
yes having a 6870 or 6950 would be awesome however they cost 2-3 times that of a 6770. (lol I'd love to have a 6990 lol)
Umm, It sounds like I could crossfire my 5770 with a 6770 because as you said there isnt much difference. right?

Um what do you mean by scalling?
Compuman145:"The problem is the 5000 series had terrible scaling,"
Anubis1127:"5770 crossfire does perform nicely, I'm just not sure how well it will scale with a phenom II x4 running at 3.1ghz"

Explain as if to someone who has no idea please smile.gif

EDIT:"You could crossfire with 6770 but it has to be the main rendering card as part of the crossfire setup, not the otherway around. 5770 = 6770 in performance. "

how would i make sure its the main rendering card?

A hd6870 can be had for $160-200, a hd6950 can be had for $200-250, yes that is more than a $100 hd6770, but what I was proposing was to sell your hd5770 for maybe ~$75, take that $100 you would have spent on a hd6770, and buy yourself a single faster GPU. It will use less power, and generate less heat.

Typically how well a crossfire setup will scale is dependant on the GPU's used, and the CPU as well. With the lower IPC of a phenom II, you won't get the results you may expect if you are looking at hd5770 crossfire reviews where they used an overclocked i7 CPU. That's all I was getting at.

Yes, it looks like the hd6770 can be used with the hd5770, check this compatibility chart:

AMD_CrossfireX_Chart_1618W.jpg

By main rendering card, he means having it be the first card, or in the top PCI-e slot of your motherboard.
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