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Ati Sapphire Radeon HD 4870 Crossfire problem or what?!

post #1 of 44
Thread Starter 
Hi.
I have the Asus Maximus II Formula motherboard, 600W power supply, and I had ONE Ati Sapphire Radeon HD 4870. It had a Windows 7 rating of 7.5, and when overclocked from 750MHZ core clock to 800MHZ the score would go up to 7.6!

Here's the issue, I just bought a second one, connected it to my power supply using the adapter cables it came with, and linked it to my first card with the PCI BRIDGE thing. However, I did the Windows 7 rating and I still get 7.5 (I know its the worst thing to determine benchmarks) but I was expecting it to at least go higher. Moreover, I overclocked both cards to 800MHZ core clock and it didn't even score 7.6 on Windows 7 rating, it stayed 7.5! The PCI-Express bus went from 16x to 8x, but I'm guessing that is normal since that is what my motherboard supports for Crossfire(I think), and I read that there isn't much of a difference between 8x 8x and 16x 16x.

So basically I feel like I wasted $80, one card overclocked gave me a better score in windows that the 2 cards overclocked together! I ran my Wii emulator also, expecting it to run my games now with anti aliasing, but It was going slow, even on default settings I felt no difference!
HELP?!

*[NOTE: I am using the original 2x 6PIN that my power supply has for the first card, and since my power supply doesn't have another 2x 6PIN, I am using 2 adapters (Molex-6PIN PCI-E Adapter) for the second card, but I don't think that should affect anything(I think)]
Edited by MoroueA - 2/18/11 at 7:30pm
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Intel Core 2 Quad Q6600 8MB L2 Cache @ 3.6GHZ Asus Maximus II Formula Ati Sapphire Radeon HD 4870 Crossfire Mode 2x 2GB G Skill 5-5-5-15 1066Mhz @ 1128Mhz 
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Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
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post #2 of 44
Thread Starter 
My cards are failing the ATI GPU test (In the AMD Overdrive section of catalyst control center) even WITHOUT the overclock AND on default settings.
Edited by MoroueA - 2/18/11 at 7:04pm
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Intel Core 2 Quad Q6600 8MB L2 Cache @ 3.6GHZ Asus Maximus II Formula Ati Sapphire Radeon HD 4870 Crossfire Mode 2x 2GB G Skill 5-5-5-15 1066Mhz @ 1128Mhz 
Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
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Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
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post #3 of 44
Thread Starter 
bump
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Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
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Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
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post #4 of 44
Whats your power supply?
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post #5 of 44
WEI is the biggest piece of crap ever.

Test it with some benchmarks or actual gameplay...
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post #6 of 44
Thread Starter 
Thermaltake TR2-600W.
I don't believe it's a cheap power supply though,
Ati's recommended settings for these cards on Crossfire is at least 600W.
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CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6600 8MB L2 Cache @ 3.6GHZ Asus Maximus II Formula Ati Sapphire Radeon HD 4870 Crossfire Mode 2x 2GB G Skill 5-5-5-15 1066Mhz @ 1128Mhz 
Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
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Antec TRUEPOWER NEW 650W Antec Six Hundred V1 Gaming Computer Case 
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Temporary System
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CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6600 8MB L2 Cache @ 3.6GHZ Asus Maximus II Formula Ati Sapphire Radeon HD 4870 Crossfire Mode 2x 2GB G Skill 5-5-5-15 1066Mhz @ 1128Mhz 
Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
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post #7 of 44
Thread Starter 
bump
Temporary System
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CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6600 8MB L2 Cache @ 3.6GHZ Asus Maximus II Formula Ati Sapphire Radeon HD 4870 Crossfire Mode 2x 2GB G Skill 5-5-5-15 1066Mhz @ 1128Mhz 
Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
PowerCase
Antec TRUEPOWER NEW 650W Antec Six Hundred V1 Gaming Computer Case 
  hide details  
Reply
Temporary System
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CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6600 8MB L2 Cache @ 3.6GHZ Asus Maximus II Formula Ati Sapphire Radeon HD 4870 Crossfire Mode 2x 2GB G Skill 5-5-5-15 1066Mhz @ 1128Mhz 
Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
PowerCase
Antec TRUEPOWER NEW 650W Antec Six Hundred V1 Gaming Computer Case 
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post #8 of 44
Thermaltake TR2 units are low end junk, you would be better off with an Antec unit.

Read this PSU guide for more info

Edit: with a 4870 crossfire I wouldn't go lower than 700w for a PSU. Maybe 650 if it's a nice quality unit like the SeaSonic X650
Edited by Kratthew D. Kraids - 2/19/11 at 4:51pm
    
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post #9 of 44
Thread Starter 
Could that be the reason there's no difference in my graphic performance?? I mean, it's the SAME damn performance as 1 card...
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Intel Core 2 Quad Q6600 8MB L2 Cache @ 3.6GHZ Asus Maximus II Formula Ati Sapphire Radeon HD 4870 Crossfire Mode 2x 2GB G Skill 5-5-5-15 1066Mhz @ 1128Mhz 
Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
PowerCase
Antec TRUEPOWER NEW 650W Antec Six Hundred V1 Gaming Computer Case 
  hide details  
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Temporary System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6600 8MB L2 Cache @ 3.6GHZ Asus Maximus II Formula Ati Sapphire Radeon HD 4870 Crossfire Mode 2x 2GB G Skill 5-5-5-15 1066Mhz @ 1128Mhz 
Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
PowerCase
Antec TRUEPOWER NEW 650W Antec Six Hundred V1 Gaming Computer Case 
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Reply
post #10 of 44
Thread Starter 
and I did test it on my Wii emulator, NO DIFFERENCE !
Temporary System
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CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6600 8MB L2 Cache @ 3.6GHZ Asus Maximus II Formula Ati Sapphire Radeon HD 4870 Crossfire Mode 2x 2GB G Skill 5-5-5-15 1066Mhz @ 1128Mhz 
Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
PowerCase
Antec TRUEPOWER NEW 650W Antec Six Hundred V1 Gaming Computer Case 
  hide details  
Reply
Temporary System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6600 8MB L2 Cache @ 3.6GHZ Asus Maximus II Formula Ati Sapphire Radeon HD 4870 Crossfire Mode 2x 2GB G Skill 5-5-5-15 1066Mhz @ 1128Mhz 
Hard DriveOptical DriveOSMonitor
2x 1TB Hitachi 7,200RPM 64MB Cache RAID 0 LG SuperMulti DVD-R Windows 7 Ultimate 64-Bit Acer X203H 
PowerCase
Antec TRUEPOWER NEW 650W Antec Six Hundred V1 Gaming Computer Case 
  hide details  
Reply
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