Zotac RTX 3090 AMP Extreme Holo Review

1. Introduction2. Zotac RTX 3090 AMP Extreme Holo3. Testing Methodology4. 3DMark Fire Strike & Time Spy5. 3DMark DirectX Raytracing6. 4K Game Benchmarks7. Clock Speed8. GPU Temperatures9. Memory Temperatures10. Acoustics11. Noise-Normalised Temperatures12. Power Consumption13. Overclocking14. Closing Thoughts15. View All Pages

It's been some time since we last looked at a graphics card based on Nvidia's flagship RTX 3090 GPU, but that changes today with our review of Zotac's new RTX 3090 AMP Extreme Holo. The company's top-tier SKU, the AMP Extreme Holo sports an immensely large cooler, bling-tastic RGB implementation, plus a 420W power target to ensure you are getting every last drop of performance from the GA102 silicon. 

The Zotac RTX 3090 AMP Extreme Holo certainly isn't for the faint of heart. Aside from its sheer size – it measures in over 35cm long – it features a bold and RGB-heavy design, which is likely to split opinion. From a technical perspective however, with a 420W power target plus a 120MHz factory overclock compared to reference specifications, it sounds very exciting indeed. Let's dive in and see what this card is all about.

	RTX 3090	RTX 3080 Ti	RTX 3080	RTX 3070	RTX 3060 Ti
SMs	82	80	68	46	38
CUDA Cores	10496	10240	8704	5888	4864
Tensor Cores	328	320	272	184	152
RT Cores	82	80	68	46	38
Texture Units	328	320	272	184	152
ROPs	112	112	96	96	80
GPU Boost Clock	1695 MHz	1665 MHz	1710 MHz	1725 MHz	1665 MHz
Memory Data Rate	19.5 Gbps	19 Gbps	19 Gbps	14 Gbps	14 Gbps
Total Video Memory	24GB GDDR6X	12GB GDDR6X	10GB GDDR6X	8GB GDDR6	8GB GDDR6
Memory Interface	384-bit	384-bit	320-bit	256-bit	256-bit
Memory Bandwidth	936 GB/Sec	912 GB/Sec	760 GB/Sec	448 GB/Sec	448 GB/Sec
TGP	350W	350W	320W	220W	200W

RTX 3090 uses the GA102 GPU, which also forms the basis for RTX 3080. Even with its 82 SMs, however, this is not actually a full implementation of GA102, as a fully populated die houses 84 SMs, so just two are missing from the RTX 3090. Ampere has doubled the number of FP32 shaders per SM, so there’s a total of 128 CUDA Cores in each of those 82 SMs, for a grand total of 10496.

Each SM also houses a single RT Core, as well as four Tensor cores, giving us 328 with the RTX 3090. Additionally, there’s 328 texture units and 112 ROPs.

As for the memory, this is a significant step up from the RTX 3080. RTX 3090 of course still uses GDDR6X memory, but it has over double the amount with 24GB. Additionally, the modules are clocked slightly faster at 19.5Gbps, and the memory interface is also slightly wider than RTX 3080, with a 384-bit interface. Total memory bandwidth comes in just shy of 1TB/s, hitting 936 GB/s.

RTX 3090 defaults to a boost clock of 1695MHz, but Zotac has added 120MHz to this, bringing it up to 1815MHz. Later in the review we test exactly how fast this GPU actually operates, as we would expect GPU Boost to bring clock speed well above the rated speed.

Power draw has also been increased with the AMP Extreme Holo, up from 350W to 420W. It will be interesting to see how that affects GPU cooling as well.

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