We’ve used 3D Mark’s Fire Strike test and four Unigine Heaven benchmarks to test theoretical performance, and we’ve taken idle and load temperatures and power requirements to see which card is the coolest and most frugal. We’ve tested at 1,920 x 1,080, 2,560 x 1,440 and even 3,840 x 2,160 to see which card is best across single-screens – and to check if any of them can handle 4K. Battlefield 4, Bioshock Infinite and Crysis 3 all return from our previous reviews, and we’ve added Metro: Last Light and Batman: Arkham Origins to the mix. We’ve locked and loaded five games for this GPU test.
Nvidia’s card has a total memory bandwidth of 224GB/s, while AMD’s hardware ramps that up to 320MB/s. Partitioned memory or not, though, the GTX 970 can’t compete with the R9 290 here, either – at least on paper. That’s not the only issue – Nvidia’s initial specification lists said that the GTX 970 had 64 ROPs and 2MB of cache, but it’s actually got 56 ROPs and 1.75MB of cache. There may be 4GB of GDDR5 soldered to the PCB, but that’s not the whole story: half a gigabyte of that memory is partitioned into a slower section that’s used for less demanding workloads, which means that only 3.5GB is available for high-end games. The GTX 970’s memory situation isn’t great, either. Its total throughput of 3.49 TFLOPS is impressive, but AMD’s Radeon R9 290 – a card that’s around £30 cheaper – serves up 4.84 TFLOPS of power.
Benchmark test gpu gtx 970 vs gtx750 full#
It’s a move that means tasks can be delegated with more precision, which means that not all sections of the card need to always run at full pelt, so that power consumption and heat can both be reduced.ĭespite the impressive specification and efficiency improvements, the GTX 970 is fighting an uphill battle. Nvidia has spent time reconfiguring the organisation of its stream processors in this card, so now they’re arranged into smaller, more plentiful blocks. Maxwell isn’t just about pure power – it’s about efficiency, too. It’s the same GM204 core that’s deployed inside the range-topping GTX 980, although that card has an even more impressive specification: 2,048 stream processors and a higher base clock of 1,126MHz. It’s clocked to a potent 1,050MHz, and that figure can rise to a maximum boost speed of 1,250MHz. It’s constructed using 1,664 stream processors – the 750 Ti only had 640 – and it’s paired with 4GB of GDDR5 memory. Here, though, it’s a far more formidable GPU. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.The Nvidia GeForce GTX 970 sits in the middle of Nvidia’s latest range, but it’s not got new hardware inside – its Maxwell architecture first debuted in 2013’s mainstream GTX 750 Ti card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. It is measured in millions of texels in a second. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). This is calculated by multiplying the total number of texture units by the core speed of the chip. Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. It especially helps with AA, HDR and high resolutions. The higher the bandwidth is, the faster the card will be in general. If it uses DDR RAM, it should be multiplied by 2 again. The number is calculated by multiplying the card's interface width by the speed of its memory. Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be transferred past the external memory interface within a second.
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