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GPU Comparison

Side-by-side comparison of specifications and performance

AMD Radeon RX 6900 XT

AMD Radeon RX 6900 XT

AMD Radeon HD 6990

AMD Radeon HD 6990

Performance Comparison

AMD Radeon RX 6900 XT

563%
563%

AMD Radeon HD 6990

18%
18%
AMD Radeon RX 6900 XT is approximately 545% faster

Technical Specifications

SpecificationAMD Radeon RX 6900 XTAMD Radeon HD 6990
Graphics ProcessorDifferent
Navi 21
Antilles x2
CoresDifferent
5120
1536 x2
TMUsDifferent
320
96 x2
ROPsDifferent
128
32 x2
Memory SizeDifferent
16 GB
2 GB x2
Memory TypeDifferent
GDDR6
GDDR5
Bus WidthDifferent
256 bit
256 bit x2

Graphics Processor

FeatureAMD Radeon RX 6900 XTAMD Radeon HD 6990
GPU NameDifferent
Navi 21
Antilles
GPU VariantDifferent
Navi 21 XTX(215-121000167)
Antilles XT(215-0807027)
ArchitectureDifferent
RDNA 2.0
TeraScale 3
Foundry
TSMC
TSMC
Process SizeDifferent
7 nm
40 nm
TransistorsDifferent
26,800 million
2,640 million
DensityDifferent
51.5M / mm²
6.8M / mm²
Die SizeDifferent
520 mm²
389 mm²
Chip PackageDifferent
BGA-2425
N/A

Graphics Card

FeatureAMD Radeon RX 6900 XTAMD Radeon HD 6990
Release DateDifferent
Oct 28th, 2020
Mar 8th, 2011
AvailabilityDifferent
Dec 8th, 2020
N/A
GenerationDifferent
Navi II(RX 6000)
Northern Islands(HD 6900)
PredecessorDifferent
Navi
Evergreen
SuccessorDifferent
Navi III
Southern Islands
ProductionDifferent
Active
End-of-life
Launch PriceDifferent
999 USD
699 USD
Current PriceDifferent
Amazon/Newegg
N/A
Bus InterfaceDifferent
PCIe 4.0 x16
PCIe 2.0 x16
ReviewsDifferent
33 in our database
47 in our database

Clock Speeds

FeatureAMD Radeon RX 6900 XTAMD Radeon HD 6990
Base ClockDifferent
1825 MHz
N/A
Game ClockDifferent
2015 MHz
N/A
Boost ClockDifferent
2250 MHz
N/A
Memory ClockDifferent
2000 MHz16 Gbps effective
1250 MHz5 Gbps effective
GPU ClockDifferent
N/A
830 MHz

Memory

FeatureAMD Radeon RX 6900 XTAMD Radeon HD 6990
Memory SizeDifferent
16 GB
2 GB
Memory TypeDifferent
GDDR6
GDDR5
Memory Bus
256 bit
256 bit
BandwidthDifferent
512.0 GB/s
160.0 GB/s

Render Config

FeatureAMD Radeon RX 6900 XTAMD Radeon HD 6990
Shading UnitsDifferent
5120
1536
TMUsDifferent
320
96
ROPsDifferent
128
32
Compute UnitsDifferent
80
24
RT CoresDifferent
80
N/A
L0 CacheDifferent
32 KB per WGP
N/A
L1 CacheDifferent
128 KB per Array
8 KB (per CU)
L2 CacheDifferent
4 MB
512 KB
L3 CacheDifferent
128 MB
N/A

Theoretical Performance

FeatureAMD Radeon RX 6900 XTAMD Radeon HD 6990
Pixel RateDifferent
288.0 GPixel/s
26.56 GPixel/s
Texture RateDifferent
720.0 GTexel/s
79.68 GTexel/s
FP16 (half)Different
46.08 TFLOPS (2:1)
N/A
FP32 (float)Different
23.04 TFLOPS
2.550 TFLOPS
FP64 (double)Different
1,440.0 GFLOPS (1:16)
637.4 GFLOPS (1:4)

Board Design

FeatureAMD Radeon RX 6900 XTAMD Radeon HD 6990
Slot WidthDifferent
Triple-slot
Dual-slot
LengthDifferent
267 mm10.5 inches
310 mm12.2 inches
HeightDifferent
120 mm4.7 inches
115 mm4.5 inches
WidthDifferent
50 mm2 inches
40 mm1.6 inches
TDPDifferent
300 W
375 W
Suggested PSUDifferent
700 W
750 W
OutputsDifferent
1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C
1x DVI4x mini-DisplayPort 1.2
Power Connectors
2x 8-pin
2x 8-pin
Part NumberDifferent
102-D412
N/A
Board NumberDifferent
109-D412A7-00_03
109-C20647-00

Graphics Features

FeatureAMD Radeon RX 6900 XTAMD Radeon HD 6990
DirectXDifferent
12 Ultimate (12_2)
11.2 (11_0)
OpenGLDifferent
4.6
4.4
OpenCLDifferent
2.1
1.2
VulkanDifferent
1.3
N/A
Shader ModelDifferent
6.8
5.0

Comparison Summary

7
Specifications Compared
8
Feature Categories
57
Detailed Features

More Comparisons with AMD Radeon RX 6900 XT

Compare AMD Radeon RX 6900 XT with other GPUs of similar performance

AMD Radeon RX 6900 XT vs GeForce RTX 4070 Ti

GeForce RTX 4070 Ti Performance113%

GeForce RTX 4070 Ti is 13% faster than AMD Radeon RX 6900 XT

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AMD Radeon RX 6900 XT vs GeForce RTX 5070

GeForce RTX 5070 Performance112%

GeForce RTX 5070 is 12% faster than AMD Radeon RX 6900 XT

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AMD Radeon RX 6900 XT vs GeForce RTX 3090

GeForce RTX 3090 Performance111%

GeForce RTX 3090 is 11% faster than AMD Radeon RX 6900 XT

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AMD Radeon RX 6900 XT vs GeForce RTX 3080 Ti

GeForce RTX 3080 Ti Performance109%

GeForce RTX 3080 Ti is 9% faster than AMD Radeon RX 6900 XT

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AMD Radeon RX 6900 XT vs GeForce RTX 4070 SUPER

GeForce RTX 4070 SUPER Performance106%

GeForce RTX 4070 SUPER is 6% faster than AMD Radeon RX 6900 XT

Compare Detailed Specs

AMD Radeon RX 6900 XT vs Radeon RX 7900 GRE

Radeon RX 7900 GRE Performance104%

Radeon RX 7900 GRE is 4% faster than AMD Radeon RX 6900 XT

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More Comparisons with AMD Radeon HD 6990

Compare AMD Radeon HD 6990 with other GPUs of similar performance

AMD Radeon HD 6990 vs GeForce GTX 1650

GeForce GTX 1650 Performance119%

GeForce GTX 1650 is 19% faster than AMD Radeon HD 6990

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AMD Radeon HD 6990 vs Radeon RX 6400

Radeon RX 6400 Performance117%

Radeon RX 6400 is 17% faster than AMD Radeon HD 6990

Compare Detailed Specs

AMD Radeon HD 6990 vs Arc A380

Arc A380 Performance115%

Arc A380 is 15% faster than AMD Radeon HD 6990

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AMD Radeon HD 6990 vs GeForce GTX 780

GeForce GTX 780 Performance115%

GeForce GTX 780 is 15% faster than AMD Radeon HD 6990

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AMD Radeon HD 6990 vs Radeon HD 7970 GHz Edition

Radeon HD 7970 GHz Edition Performance104%

Radeon HD 7970 GHz Edition is 4% faster than AMD Radeon HD 6990

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AMD Radeon HD 6990 vs GeForce GTX 590

GeForce GTX 590 Performance104%

GeForce GTX 590 is 4% faster than AMD Radeon HD 6990

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