Questions about the R9 280X crossfire

700 can receive a cheaper HD7950, the same vest can be hybridized, the power supply is enough, pice X4 has little impact, there are related tests you can search, X4--X16 The difference is very small.

If you can get out, add money directly to GTX970, the budget is enough, and the performance can also reach more than 8 percent of 280X CF, GTX970 can't be cool, dual SIM 280X is not good, and the power consumption is much smaller, saving too much electricity, and you can continue to consider 970SLI in the future, N card is indeed compatible, , don't believe you go to run down Resident Evil Apocalypse 2, no matter how good a card is still stuck with you.

Of course, there can be a firefight.

The performance of the two R9-280X after the crossfire can even exceed that of the GTX980, but limited by the 3G video memory, the actual game performance is not as good as the running score, and not all games support CF. In addition, the 280X group firefight requires a very strong power supply, at least rated at 750W or more to be safely brought up, while the GTX980 only needs to be rated at 550W. Therefore, although the 280X group CF looks attractive, but there are many practical problems, if you really need this kind of high performance, it is recommended to start with 980 or R9-390X, after all, it can be single or double, "I am smarter than the manufacturer" is often mistaken by the smart.

It can be crossfired, the performance is equal to a piece HD7990, the power consumption is only 450W, and the power supply must be rated at least 750E or more.

If you look at the 3DMark score alone, the 270X Crossfire can reach the performance of the GTX780Ti, the 290 score is only 4200 to 4300, the 290X and GTX780 are also 4600 to 4700, and the GTX780Ti 270X is around 5000 points.

The parameters of the 290 are almost exactly double that of the 270, so the theoretical 270 crossfire performance is close to that of the 290. The frequency of 270x is much higher than that of 290, and the score naturally exceeds 290 and even fights with 290x GTX780. In terms of power consumption, in fact, 290 does not save much points compared to 270x firefights, the gap between the two is less than 50W at full load, and the gap is only about 10W in the idle state.

After all, the power consumption and performance of the graphics card are basically proportional to the number of SPs of the graphics card (at the same frequency), and the dual cards consume more graphics card components! However, it is still recommended to play a single card, and dual cards depend on the support of the game. Although dual SIM can increase the average frame rate and the maximum frame rate, the minimum frame rate of a single card and dual card is almost the same when encountering a burst frame, but if you change to a single card with double performance, the minimum frame rate will at least be increased a little (unless the CPU is terrible and becomes a bottleneck). ）

Personally, I think that the comprehensive aspect is definitely not as good as 290.,It's still possible to exceed 280x.。。。

2 270x firefights,From an economic point of view,It's not cost-effective.,It's recommended to go directly to 290.。。。

R9 270 stream processor and bit width is just half of R9 290, so the theoretical performance of 270 crossfire is equal to 290, 270x frequency is higher than 290, the performance should be between 290 and 290x, I measured Dilan 270x demon crossfire 3DMark11 default x5100+ overclocking to 1250 6000 after x5300+ The running score has exceeded 290x to reach the level of GTX780TI, but the actual game is not very sure.

At present, whether it is AMD CrossFire or NVIDIA SLI, multiple graphics cards can only recognize the video memory of one of the graphics cards.

DX12 (Win10 and higher system support) may support the video memory superposition when multiple graphics cards are connected in parallel, but the official version of Win10 has not yet been answered as of the question, and what the situation is depends on the results of the official version.

No, at this stage, AMD dual graphics card firefight can only identify the video memory of the graphics card, and cannot be stacked.

Dual graphics is ATI's multi-GPU technology that allows multiple graphics cards to be used side-by-side on a single computer at the same time to increase computing performance. The goal is often to dramatically increase the graphics processing power of the entire computer, so that 3D games can run better.

Here's how to get the parameters of R9 280x

Applicable Type: Desktop;

Core Codename: Tahiti XTL;

Manufacturing process: 28nm;

Memory bit width: 384bit;

DirectX version: directx ;

Core Frequency: 1000MHz;

Video memory frequency: 6000MHz;

Memory bandwidth: 288GB s.

Not at the moment, but DX12 comes out, maybe there is a play. Now only one piece can be identified.