With the release of the series 6800 graphics cards obviously also comes Multi-GPU support. For those of you who have read the reference review, ya'll very likely noticed the photo's with the one CrossfireX connector on top of the card.
CrossfireX, it's a multi-GPU state which we'll cover a bit more in-depth on the next pages, pretty much you can utilize two or more graphics cards to work together and, hopefully, nearly double up on the game rendering performance.
As stated above, the Radeon HD 6850 and 6870 only have one CrossfireX connector, this literally means that you can place only two cards into a multi-GPU setup. While you might feel merely two cards is a limitation, we think .. it's just fine. As always we do not recommend you to utilize more than two GPUs in a PC anyway as you'd quickly run into driver issues, increased power consumption, more heat in the PC to deal with and well .. it's just that the overall compatibility factor starts to increasingly get complicated once you opt 3 or 4-way CrossfireX multi-GPU setups.
Two is fine really ... so with that said let's grab a reference 6850 and 6870 card from AMD, and then hook them up with some retail cards from HIS, to see where we end up performance wise.
I can already tell you this though, this was the first time ever we had no issues with drivers, and yeah, in most cases the CrossfireX scaling was just extraordinary good.
Oh you're interested now eh ? Good, let's head onwards into the review then.
Upper photo here two R6870 cards installed in CrossfireX multi-GPU mode.
PowerColor Radeon HD 7850 SCS3 review We test and review the PowerColor Radeon HD 7850 SCS3 today. This stock clocked Radeon HD 7850 is cooled passively, meaning it has no fans tool it down. That also means it's rather silent as it does not make any noise. But what about temperatures then you must be wondering ?
Gigabyte Radeon HD 7790 2GB OC review We test and review the Gigabyte Radeon HD 7790 2GB OC edition, also known under SKU code GV-R7790OC-2GD. We benchmark the product incl FCAT Frametimes. The new graphics card is intended to boost a little more performance into entry-level gaming. The Gigabyte HD7790 OC 2GB clocks in at 1075 MHz on the boost engine, packed with totally silent custom cooling.
MSI Radeon HD 7790 TurboDuo OC review We test and review the MSI Radeon HD 7790 OC edition, also known under SKU code R7790-1GD5-OC incl FCAT Frametimes. The new graphics card is intended to boost a little more performance into entry-level gaming.
Radeon HD 7990 review We review the new AMD Radeon HD 7990 including FCAT frametime measurements. The dual GPU product that you guys learned to know under codename Malta finally is released. AMD it doing it in style, two fully equipped Tahiti XT2 GPUs versus good yet silent cooling. In this review we'll look at the product, the architecture, the benchmarks, including frametime based FCAT measurements. Head on over towards our AMD Radeon HD 7990.