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Crossfire vram question

post #1 of 11
Thread Starter 
Does vram share between cards in crossfire like 1gb + 1gb or does crossfire use vram from both card equally, or from only one card?
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Kone
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post #2 of 11
Unfortunately, it uses them both equally. So 1GB is only 1GB.

The reason is because it puts exactly the same things in the memory of both cards so that they can both process that stuff from memory at the same times.
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post #3 of 11
It has always been that way I thought? even with Nvidia. That's one of the reasons why 1 + 1 /= 2 when using crossfire or sli smile.gif
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post #4 of 11
Quote:
Originally Posted by Sebastiaan1985;14466864 
It has always been that way I thought? even with Nvidia. That's one of the reasons why 1 + 1 /= 2 when using crossfire or sli smile.gif
Not with the memory, though. The contents of the memory chips are identical in both cards when they're both being used so that both cards can process what's in the memory at the same time to help improve performance (that is, it's one of the ways the performance gets improved in Crossfire or SLI). Otherwise, the purpose of using Crossfire or SLI would be partly defeated.
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post #5 of 11
off topic : did someone really wrote heat sync? damn
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post #6 of 11
Quote:
Originally Posted by TwoCables;14467005 
Not with the memory, though. The contents of the memory chips are identical in both cards when they're both being used so that both cards can process what's in the memory at the same time to help improve performance (that is, it's one of the ways the performance gets improved in Crossfire or SLI). Otherwise, the purpose of using Crossfire or SLI would be partly defeated.

Or, either card could process half of the image (if that works out).

It would be nice if there was a 2GB pool of memory in the middle that both cards shared. Of course, that would require double the bus and speed would be halved because it would be going to two cores simultaneously.

But I'm sure there's a reason they don't do that.
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White Phoenix
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post #7 of 11
Quote:
Originally Posted by Sebastiaan1985;14467040 
off topic : did someone really wrote heat sync? damn
A few too many times. smile.gif
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It's a computer!
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post #8 of 11
Quote:
Originally Posted by TwoCables;14467505 
A few too many times. smile.gif

Wow, 33,000 posts. I can only imagine all the things you must have seen.
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post #9 of 11
Quote:
Originally Posted by Track;14467524 
Wow, 33,000 posts. I can only imagine all the things you must have seen.
hehe smile.gif
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It's a computer!
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CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #10 of 11
Quote:
Originally Posted by Sebastiaan1985;14467040 
off topic : did someone really wrote heat sync? damn

I do that all the time frown.gif
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