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GPU memory behavior

post #1 of 2
Thread Starter 
Hello Guys, I was a little bored this night and started thinking on the new breed of dual GPU cards waiting near the corner. As far as i know, when you use a dual GPU video card, you are effectively using a crossfire/sli configuration but with the advantage of using only one PCI-E slot unlike the traditional single GPU dual video card/bridge setup(correct me if im wrong). Thats pretty much straight for me, the real question comes in how the memory is managed in both scenarios.

Again, as far as i know, a traditional crossfire/sli doesn't increase the memory for your setup. Let me explain myself and for this purpose I will refer to AMD 5850. Lets say you got one AMD 5850 1GB card one day. As we all know, the AMD 5850 has only 1GB of memory (not taking into account any exotic version out there). Then after some time with the AMD 5850, you go and buy another AMD 5850 because you need more power for your games. You setup the new card into your existing system and connect the lil' flat bridge and boom CROSSFIRE BABY!!! still.... you have 1GB of total video memory.

As for dual GPU (lets think 5970 and 6990)video cards, I've seen em come with like 4GB of memory, but those 4gb are divided between the GPUs or shared among them?

Sorry if my question sounds dumb but..... needed to ask!
post #2 of 2
The dual gpu cards have half of its memory per core (ie a 5970 2gb has 1gb/core)
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1155 POWER
(16 items)
 
AMD Heater
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CPUMotherboardGraphicsGraphics
i5 2500k 4,6Ghz Asus Maximus IV Extreme Palit GTX 560 Ti Sonic Gigabyte GTX 560 Ti Overclocked 
RAMHard DriveHard DriveCooling
8GB G.Skill Sniper 1886MHz Seagate 500GB and Samsung 500GB Samsung 840 SSD Corsair H50 
OSMonitorKeyboardPower
Windows 7 Ultimate 64-bit BenQ XL2411Z Steelseries Merc Stealth Nox Apex 800w 
CaseMouseMouse Pad
Antec Lanboy Air Logitech G400s Steelseries Qck Mass 
CPUMotherboardGraphicsRAM
AMD 955 BE Asus Crosshair Formula II nVidia GTX 260 Core 216 55nm Kingston DDR2 4GB 800Mhz 
Hard DriveOptical DriveCoolingOS
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MonitorPowerCaseMouse
Some Samsung. Corsair CX600 NZXT Tempest A4Tech X7 
Mouse Pad
Bundled Black Ops Mousepad lol 
CPUMotherboardGraphicsRAM
Intel i5-4210H MSI MS-16GF GTX 850M 8GB DDR3 
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