In the gpu comparison between the Sapphire Nitro+ Radeon RX 6800 XT and the Gainward GeForce RTX 3090 Phantom, we compare both the technical data and the benchmark results of the two graphics cards.
Quick comparison
In FP32 performance, the Gainward GeForce RTX 3090 Phantom is 68 % faster than the Sapphire Nitro+ Radeon RX 6800 XT.
The Sapphire Nitro+ Radeon RX 6800 XT is based on the AMD Radeon RX 6800 XT and has 4608 texture shaders and 72 execution units.
Gainward GeForce RTX 3090 Phantom is based on NVIDIA GeForce RTX 3090, which has 10496 shaders and 82 execution units.
Memory
Memory
Sapphire Nitro+ Radeon RX 6800 XT
Gainward GeForce RTX 3090 Phantom
Memory Size
16 GB
24 GB
Memory Type
GDDR6
GDDR6X
Memory Clock
2.000 GHz
1.219 GHz
Memory Speed
16.0 Gbps
19.5 Gbps
Memory bandwidth
512 GB/s
936 GB/s
Memory Interface
256 bit
384 bit
More information
The Sapphire Nitro+ Radeon RX 6800 XT has 16 GB of graphics memory of the type GDDR6 and achieves a memory bandwidth of 512 GB/s.
The Gainward GeForce RTX 3090 Phantom can access 24 GB GDDR6X graphics memory and thus achieves a memory bandwidth of 936 GB/s.
Clock Speeds
Clock Speeds
Sapphire Nitro+ Radeon RX 6800 XT
Gainward GeForce RTX 3090 Phantom
Base Clock
1.925 GHz
1.395 GHz
Boost Clock
2.360 GHz
1.740 GHz
Avg (Game) Clock
2.11 GHz
--
Overclocking
Yes
Yes
More information
The Sapphire Nitro+ Radeon RX 6800 XT clocks in the base with up to 1.925 GHz. The base frequency of the Gainward GeForce RTX 3090 Phantom is 1.395 GHz.
Thermal Design
Thermal Design
Sapphire Nitro+ Radeon RX 6800 XT
Gainward GeForce RTX 3090 Phantom
TDP
300 W
370 W
TDP (up)
345 W
--
Tjunction max
100 °C
93 °C
PCIe-Power
2 x 8-Pin
3 x 8-Pin
More information
The TDP (Thermal Design Power) of the Sapphire Nitro+ Radeon RX 6800 XT is 300 W. The graphics card is supplied with energy via the 2 x 8-Pin connector.
The Gainward GeForce RTX 3090 Phantom has a TDP of 370 W and is supplied with the required energy via 3 x 8-Pin PCIe power connectors.
Cooler & Fans
Cooler & Fans
Sapphire Nitro+ Radeon RX 6800 XT
Gainward GeForce RTX 3090 Phantom
Fan-Type
Axial
Axial
Fan 1
2 x 95 mm
3 x 90 mm
Fan 2
1 x 85 mm
--
Cooler-Type
Air cooling
Air cooling
Noise (Idle)
0 dB
0 dB
Noise (Load)
36 dB
--
More information
The Sapphire Nitro+ Radeon RX 6800 XT has a total of 3 Axial fans.
The Gainward GeForce RTX 3090 Phantom has 3 Axial fans to cool the GPU and memory.
Connectivity
Connectivity
Sapphire Nitro+ Radeon RX 6800 XT
Gainward GeForce RTX 3090 Phantom
Max. Displays
4
4
HDCP
2.3
2.3
HDMI
1x HDMI 2.1
1x HDMI 2.1
DisplayPort
3x DP 1.4a
3x DP 1.4a
More information
In the connectivity category, we recorded the number of ports on a graphics card. A total of 4 screens can be connected to the Sapphire Nitro+ Radeon RX 6800 XT.
The Gainward GeForce RTX 3090 Phantom supports a maximum of 4 screens.
Featureset
Featureset
Sapphire Nitro+ Radeon RX 6800 XT
Gainward GeForce RTX 3090 Phantom
Max. resolution
7680x4320
7680x4320
DirectX
12_2 (Ultimate)
12_2 (Ultimate)
Raytracing
Yes
Yes
DLSS / FSR
Yes
Yes
LED
Addressable LED
Addressable LED
More information
The Sapphire Nitro+ Radeon RX 6800 XT supports a maximum resolution of 7680x4320 pixels.
The maximum resolution of the Gainward GeForce RTX 3090 Phantom is 7680x4320 pixels.
Supported Video Codecs
Supported Video Codecs
Sapphire Nitro+ Radeon RX 6800 XT
Gainward GeForce RTX 3090 Phantom
h264
Decode / Encode
Decode / Encode
h265 / HEVC
Decode / Encode
Decode / Encode
VP8
Decode / Encode
Decode
VP9
Decode / Encode
Decode
AV1
Decode
Decode
More information
The support and acceleration of certain video codecs directly in the graphics card reduces the load when playing or creating videos.
Dimensions
Dimensions
Sapphire Nitro+ Radeon RX 6800 XT
Gainward GeForce RTX 3090 Phantom
Length
310 mm
304 mm
Height
135 mm
136 mm
Width
55 mm
--
Width (Slots)
3 Slots
3 Slots
Weight
1,240 g
--
SFF-Ready
No
No
More information
The Sapphire Nitro+ Radeon RX 6800 XT is 310 mm long, 135 mm high and 55 mm wide.
The Gainward GeForce RTX 3090 Phantom is 304 mm long, 136 mm high and -- wide.
3DMark is a benchmark program that determines the performance of certain components of a computer and then reports the performance as a numerical value.
Cyberpunk 2077 was developed by CD Projekt Red and is based on the development studio's own REDengine 4. Ray tracing is switched off in our benchmarks.
The Last of Us Part One is a game released by Sony in June 2013 exclusively for the Playstation and released for the PC in early 2023. The benchmark values here were determined at high details.
Geekbench 6 is a cross-platform benchmark for main processors, which also carries out 3 different graphics benchmarks and outputs them in the form of a numerical value.
The theoretical computing power of the graphics card with single precision (32 bit) in TFLOPS indicates how many trillion FP32 floating point operations the graphics card (GPU) can perform per second.
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