AMD today released its next generation RDNA 3 graphics cards, the Radeon RX 7900 XTX and RX 7900 XT graphics cards.
AMD Radeon RX 7900 XT overclocked to 3.5GHz effective clock speed, RDNA 3 ‘Navi 31’ graphics processor may end up at 4GHz with LN2
While the cards offer comparable pointer performance to the NVIDIA RTX 4080 at a lower price point, they don’t have ray tracing capability, and despite AMD’s use of chip architecture, the GPUs can’t compete with the insane efficiency of the Ada “AD103” featured GPU in RTX 4080.
But that being said, both graphics cards definitely have a lot of potential in the market, and as we’ve seen earlier, AMD graphics cards tend to get better as time goes on. But that’s a topic we’ll come back to another day, today, we’ll talk about the overclocking capabilities of RDNA 3.
fellow twitter, 0x22h, tested with an AMD Radeon RX 7900 XT graphics card and seems to have managed to get the fastest overclocking speeds with the Navi 31 chip. The RX 7900 XT is overclocked to a maximum of 3.5GHz shader clock and a front clock of 3.7GHz. That’s a 1.2GHz increase in front-end and shadow clocks which is very impressive. The card peaked at a maximum board power of 400W, 45W higher than the 355W TGP and temperatures stabilized around 62°C and 85°C for the hots. With this impressive overclock, the GPU delivered 32 FP computing performance rated at up to 75 TFLOPs, an increase of 44% over the registered graphics card.
0x22h also indicates that the biggest problem with the AMD RDNA 3 architecture is that the SIMD32 modules do not have register support measures and that the FMA instructions in the WAVE32 modules can only use one resource per operand register and one immediate value in common.
This leads to only 5/6 of the actual theoretical value performance. There have been rumors of a buggy design on the top of the line RDNA 3 “Navi 31” GPU and while we can’t directly confirm this with AMD, some testing by our reviewers revealed power leaks and choppy clocks on the cards.
RDNA3 最 大 的 问题 就 是 ， simd32 之后 ， 方面 几乎 没有 配套 措施。 wave32 的 vopd 格式 下 的 个 个 fma 指令 只 能 使用 源 寄存器 和 一 一 共享 的 立即 立即 数 数 的 的 ， 而且 峰值 只 有 理论 理论 值 值 值 的 的5/6。 pic.twitter.com/iaIEdYlznf
– 0x22h (@0x22h) December 12, 2022
Most reviewers also had their AMD Radeon RX 7900 graphics cards peak at around 3GHz, as did the NVIDIA GeForce RTX 40 series, but the performance advantage was much less. AMD will release its first RDNA 3 flagships tomorrow, so let us know if you’ve made up your mind on what graphics card to get tomorrow.