![]() Of course, different games and scenes result in different numbers, but it's clear that Nvidia's excellent efficiency with its mid-range 40-series cards remains out of reach for AMD's RDNA 3 competitors. ![]() There's a similar margin for the RX 7700 XT versus the RTX 4060 Ti, with around a 55 percent increase in power consumption per frame on average in our two RT tests, versus about a 20 percent average increase in non-RT workloads. That works out as the RX 7800 XT drawing around 50 percent more Joules per frame in the RT tests, versus a narrower 25 percent increase in non-RT. The RTX 4070, by contrast, requires only ~3.5Jpf in the RT workloads and 1.0-1.4Jpf in the non-RT tests. Power analysis, using Nvidia's PCAT interposer hardware sitting between the graphics card and its power sources (PCIe slot and auxiliary inputs), reveals better power efficiency for the Ada Lovelace cards in terms of Joules per frame - by a relatively fine margin in non-RT titles and by a much more significant difference in RT workloads where AMD's hardware is on the back foot.įorza Horizon 5, 1440p, Extreme, RT Off, 4x MSAAįor the RX 7800 XT, for example, we're looking at 5.1 and 5.4 Joules per frame respectively in Dying Light 2 and Control with RT enabled, versus just 1.9 and 1.1 Joules per frame respectively in Forza Horizon 5 and Hitman 3 with RT disabled. With no special 12VHPWR connector, these can be used with a wide range of power supplies sans adapter. The RX 7800 XT is AMD's reference design, a curvy dual-slot model with two fans and two eight-pin power inputs while the RX 7700 XT we received is a Sapphire Pulse model with a boxier appearance but matching fan count and I/O. Other spec points are also close between the two cards, with an 18W TDP and 1.5Gbps memory speed advantage for the 7800 XT, partially made up for a rated 114MHz boost clock advantage for the 7700 XT.ĭespite sharing a common Navi 32 GPU, the two cards we tested for this review come in slightly different clothing. That means the two cards should offer relatively similar performance compared to the last-gen RX 6800 XT and 6700 XT, which have 72CUs and 40CUs respectively. RDNA 3 GPUsĪs we noted in our coverage of their official announcement, both of the new AMD graphics cards are based around a singular Navi 32 GPU, with the RX 7800 XT being the fully-enabled 60CU model and the RX 7700 XT using a cut-back 54CU specification. AMD's FSR 3 tech is coming soon and ought to level the playing field against Nvidia's DLSS 3 - here are our 'eyes-on' impressions. It's absolutely baffling, as the RTX 4060 Ti 8GB was a turkey, and in the meantime, price cuts on the 16GB model add further pressure to the 7700 XT. The $449/£429 RX 7700 XT? We're reminded of launch pricing for the RX 7900 XT - it offers proportionately less performance for the money than its more powerful counterpart with 4GB less framebuffer memory too, this time with a more impactful drop from a 16GB to 12GB allocation. This is AMD making life tricky for its competition. Based on US pricing, it's $100 cheaper, you get undeniably more potent rasterisation performance and the 12 gigs of VRAM offered by the Nvidia card gets a 4GB boost on its new AMD competitor. On the face of it, AMD's new $499/£479 RX 7800 XT certainly offers a strong alternative to the RTX 4070. Put simply, the RTX 4060 Ti is the least compelling offering in the entire desktop 40-series line-up - it's the closest AMD is going to get to an open goal - while the RTX 4070's value proposition was controversial, being the most expensive 70-series card Nvidia has ever made. As we move into the mid-range sector of the GPU market, AMD's latest - and last - RDNA 3-based desktop graphics cards represent yet another golden opportunity for AMD to grab some precious market share from Nvidia.
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