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Palit RTX 4090 GameRock OC Review – Midnight Kaleidoscope

Rating: 8.5.

Today we follow up our initial RTX 4090 coverage with another AIB card review. This time we are assessing the Palit RTX 4090 GameRock OC, dubbed ‘Midnight Kaleidoscope' due to the new design. It's still packing an eye-catching amount of RGB lighting, dual-BIOS and a triple-slot cooler, so let's see what this card can do as we compare it against the Nvidia Founders Edition and Inno3D X3 OC.

While the Palit RTX 4090 GameRock OC may not look radically different from the GameRock cards of the 30-series, it has undergone a few changes, including a tweaked colourway, new fan design, and updated heatsink.

Factor in the dual-BIOS, with the performance mode that allows the power limit to be pushed up to 500W, and on paper, the GameRock OC looks like a very appealing card if you're in the market for an RTX 4090. We put it through its paces today…

RTX 4090 RTX 3090 Ti RTX 3090 RTX 3080 Ti RTX 3080
Process TSMC 4N Samsung 8N Samsung 8N Samsung 8N Samsung 8N
SMs 128 84 82 80 68
CUDA Cores 16384 10752 10496 10240 8704
Tensor Cores 512 336 328 320 272
RT Cores 128 84 82 80 68
Texture Units 512 336 328 320 272
ROPs 176 112 112 112 96
GPU Boost Clock 2520 MHz 1860 MHz 1695 MHz 1665 MHz 1710 MHz
Memory Data Rate 21 Gbps 21 Gbps 19.5 Gbps 19 Gbps 19 Gbps
L2 Cache 73729 KB 6144 KB 6144 KB 6144 KB 5120 KB
Total Video Memory 24GB GDDR6X 24GB GDDR6X 24GB GDDR6X 12GB GDDR6X 10GB GDDR6X
Memory Interface 384-bit 384-bit 384-bit 384-bit 320-bit
Memory Bandwidth 1008 GB/Sec 1008 GB/Sec 936 GB/Sec 912 GB/Sec 760 GB/Sec
TGP 450W 450W 350W 350W 320W

First, for a quick spec recap. Fabbed on TSMC's 4nm node has allowed Nvidia to vastly increase transistor count, up from 28.3 billion with GA102, to a staggering 76.3 billion with the largest Ada GPU, AD102. Accordingly, core count has gone through the roof, with the RTX 4090 home to 16384 CUDA cores, with 512 Tensor cores and 128 RT cores, with a sizeable increase to the ROP count too, up to 176.

Such a leap forward in process node has also allowed Nvidia to crank the clock speed significantly, with the RTX 4090 now sporting a 2520MHz rated boost clock. The Palit GameRock OC we are reviewing today has tweaked that further, adding an extra 90MHz out of the box.

Memory configuration is almost identical to the RTX 3090 Ti, with 24GB GDDR6X running at 21Gbps, operating over a 384-bit interface, totalling memory bandwidth of just over 1TB/s. That said, there has been a substantial upgrade to the L2 cache with the Ada architecture, with the RTX 4090 now offering 73MB, compared to 6MB for GA102.

Power draw also remains at 450W, as per the RTX 3090 Ti, and while this is also the case for the Palit GameRock OC, it can reach up to 500W when overclocking.

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