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Posted 22 March 2014 - 05:30 PM
Posted 22 March 2014 - 07:38 PM
G'day, the dual 860M will certainly be faster then the 880M due to the fact, the performance is doubled and games nowadays support SLI, so it would be able to utilise both GPUs. The only downside to it is heat, but as long the laptop itself has plenty of ventilation and the intake cooling vent is not blocked, it should operate at appropriate temperature range during gaming loads.
System1: CPU- Intel Core i7-5820K @ 4.4GHz, CPU Cooler- Noctua NH-D14, RAM- G.Skill Ripjaws 16GB Kit(4Gx4) DDR3 2133MHz, SSD/HDD- Samsung 850 EVO 250GB/Western Digital Caviar Black 1TB/Seagate Barracuada 3TB, GPU- 2x EVGA GTX980 Superclocked @1360/MHz1900MHz, Motherboard- Asus X99 Deluxe, Case- Custom Mac G5, PSU- EVGA P2-1000W, Soundcard- Realtek High Definition Audio, OS- Windows 10 Pro 64-Bit
Games: APB: Reloaded, Hours played: 3100+ System2: Late 2011 Macbook Pro 15inch
Posted 05 April 2014 - 08:26 AM
Nvidia cards do not scale 100%. Your performance will never be 2x 860. It will end up 1.5~1.8x.
Then we get to the raw numbers. The 880 has 1536 cores at 945Mhz, and a 256bit memory bus with 5000Mhz ram. The 860 has 640 cores at 1029Mhz, with a 128 bit memory bus at 5000Mhz. The total computational power puts the SLI 860's at 90% of the 880. But the RAM throughput is going to straight up neuter it. The ram speed cannot be combined, so you are looking at exactly half the throughput. My best guess, would put the SLI 860's at no more than 65~70% of the 880 assuming a game that scales well with SLI @ 1080P or higher.
Laptop: Alienware 14 : Intel i7 4700mq : 8GB ram : Nvidia GTX 765 : 256GB Plextor M3 : 1080P IPS display
Test rig: AMD Phenom X4 955 @ 4.0Ghz : MSI 970A-G46 : 8GB Ram : 128GB Plextor M5s : 2x AMD 5770's (Flashed to 6770) : PC Power and Cooling Silencer 750 : Pioneer BR
Hackintosh : Gigabyte GA-H61m : Intel Celeron @ 3Ghz : 8GB ram : EVGA GTX 550Ti : Patriot Torx 2 64GB : Silverstone Strider ES-50 : OSX Mavericks
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