Quad-CrossfireX with 2 x Radeon HD 6870 X2
Now we’ll really let it rip and pack four mid-range accelerators together to form a solid-fuel rocket. The wallet would now be burdened with about 680 Euros, which is almost 100 Euros above the price of the Geforce GTX 590. Let’s first compare the Tripple and Quad CrossfireX variants:
The converted fps (y-axis) for each of the 50 individual frames is shown. The performance increase is modest at 15-20% compared to the additional effort, and the curve does not improve any more. Quad-Crossfire simply no longer makes sense with these cards and at these resolutions. The installed RAM of only 1 GB per card would also be a bottleneck for higher resolutions, which is why we refrain from further tests at this point. It’s just not worth it.
CrossfireX versus SLI
And since we naturally also tested the GTX 590 mentioned as a reference, we will now once again compare the curves of all competing variants including a Radeon HD 6990. Unfortunately, a test with 2 GTX 590s was not possible, since no second card could be found at short notice that ran stable in SLI at all. We have dedicated another smaller paragraph to the chapter Driver and Setup on one of the next pages. However, here is the promised direct comparison:
The converted fps (y-axis) for each of the 50 individual frames is shown
Interim summary
What amazes us most is the ease with which even a GTX 590 can be brushed aside by the “cheap triple” in this test setup. Both the higher frame rate and the lower jerkiness surprised and thrilled us. If the Radeon HD 6870 were available with 2 Crossfire ports, it would be the price breaker par excellence. After all, where would you get 20% more performance than a GTX 590 for just 420 Euros? However, we have to curb the general euphoria a bit, because the shortcoming of the AMD solution is once again (as almost always) the inconsistent driver performance.
The Triple-Crossfire can convince grandiosely in most tests and benchmarks, but is also pushed down to the level of a dual-GPU solution by the drivers in a few applications. The only thing that can at least give consolation is the better frame rate. Because, strangely enough, it always remains equally balanced. Not absolutely perfect, but usable. The Radeon HD 6990 is barely faster than a Radeon HD 6870 X2 and only exhibits the lower micro-stutters in the end. This dual-GPU card is also far behind the triple.
So, after reading this, let’s look at the benchmark results of the following pages with different eyes and just think of the rating from the micro jerkers’ point of view as well.
- 1 - Einführung und Übersicht
- 2 - Wir funktionieren Crossfire und SLI?
- 3 - Mikroruckler - so klein und doch so ärgerlich
- 4 - Stufe 1: CrossfireX mit 2 GPUs
- 5 - Stufe 1: CrossfireX mit 2 GPUs versus SLI
- 6 - Stufe 2: CrossfireX mit 3 GPUs
- 7 - Stufe 3: CrossfireX mit 4 GPUs versus SLI
- 8 - Testsystem und Benchmarkauswahl
- 9 - Benchmarks: 3DMark11 und Sanctuary
- 10 - Benchmarks: DirectX 11 Spiele
- 11 - Benchmarks: DirectX 10 Spiele
- 12 - Benchmarks: DirectX 9 Spiele
- 13 - Leistungsindex und Leistungsaufnahme
- 14 - Zusammenfassung und Fazit
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