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GPU Comparison

Side-by-side comparison of specifications and performance

AMD Radeon RX 6800 XT

AMD Radeon RX 6800 XT

AMD Radeon HD 7990

AMD Radeon HD 7990

Performance Comparison

AMD Radeon RX 6800 XT

365%
365%

AMD Radeon HD 7990

27%
27%
AMD Radeon RX 6800 XT is approximately 338% faster

Technical Specifications

SpecificationAMD Radeon RX 6800 XTAMD Radeon HD 7990
Graphics ProcessorDifferent
Navi 21
Malta x2
CoresDifferent
4608
2048 x2
TMUsDifferent
288
128 x2
ROPsDifferent
128
32 x2
Memory SizeDifferent
16 GB
3 GB x2
Memory TypeDifferent
GDDR6
GDDR5
Bus WidthDifferent
256 bit
384 bit x2

Graphics Processor

FeatureAMD Radeon RX 6800 XTAMD Radeon HD 7990
GPU NameDifferent
Navi 21
Malta
GPU VariantDifferent
Navi 21 XT(215-121000177)
Malta XT(215-0849026)
ArchitectureDifferent
RDNA 2.0
GCN 1.0
Foundry
TSMC
TSMC
Process SizeDifferent
7 nm
28 nm
TransistorsDifferent
26,800 million
4,313 million
DensityDifferent
51.5M / mm²
11.8M / mm²
Die SizeDifferent
520 mm²
365 mm²
Chip PackageDifferent
BGA-2425
N/A

Graphics Card

FeatureAMD Radeon RX 6800 XTAMD Radeon HD 7990
Release DateDifferent
Oct 28th, 2020
Apr 24th, 2013
AvailabilityDifferent
Nov 18th, 2020
N/A
GenerationDifferent
Navi II(RX 6000)
Southern Islands(HD 7900)
PredecessorDifferent
Navi
Northern Islands
SuccessorDifferent
Navi III
Sea Islands
ProductionDifferent
Active
End-of-life
Launch PriceDifferent
649 USD
999 USD
Current PriceDifferent
Amazon/Newegg
N/A
Bus InterfaceDifferent
PCIe 4.0 x16
PCIe 3.0 x16
ReviewsDifferent
57 in our database
37 in our database

Clock Speeds

FeatureAMD Radeon RX 6800 XTAMD Radeon HD 7990
Base ClockDifferent
1825 MHz
950 MHz
Game ClockDifferent
2015 MHz
N/A
Boost ClockDifferent
2250 MHz
1000 MHz
Memory ClockDifferent
2000 MHz16 Gbps effective
1500 MHz6 Gbps effective

Memory

FeatureAMD Radeon RX 6800 XTAMD Radeon HD 7990
Memory SizeDifferent
16 GB
3 GB
Memory TypeDifferent
GDDR6
GDDR5
Memory BusDifferent
256 bit
384 bit
BandwidthDifferent
512.0 GB/s
288.0 GB/s

Render Config

FeatureAMD Radeon RX 6800 XTAMD Radeon HD 7990
Shading UnitsDifferent
4608
2048
TMUsDifferent
288
128
ROPsDifferent
128
32
Compute UnitsDifferent
72
32
RT CoresDifferent
72
N/A
L0 CacheDifferent
32 KB per WGP
N/A
L1 CacheDifferent
128 KB per Array
16 KB (per CU)
L2 CacheDifferent
4 MB
768 KB
L3 CacheDifferent
128 MB
N/A

Theoretical Performance

FeatureAMD Radeon RX 6800 XTAMD Radeon HD 7990
Pixel RateDifferent
288.0 GPixel/s
32.00 GPixel/s
Texture RateDifferent
648.0 GTexel/s
128.0 GTexel/s
FP16 (half)Different
41.47 TFLOPS (2:1)
N/A
FP32 (float)Different
20.74 TFLOPS
4.096 TFLOPS
FP64 (double)Different
1,296.0 GFLOPS (1:16)
1,024.0 GFLOPS (1:4)

Board Design

FeatureAMD Radeon RX 6800 XTAMD Radeon HD 7990
Slot Width
Dual-slot
Dual-slot
LengthDifferent
267 mm10.5 inches
304 mm12 inches
HeightDifferent
120 mm4.7 inches
106 mm4.2 inches
WidthDifferent
50 mm2 inches
38 mm1.5 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-D41205
N/A
Board NumberDifferent
109-D412A7-00_03
109-C47637-00A_02

Graphics Features

FeatureAMD Radeon RX 6800 XTAMD Radeon HD 7990
DirectXDifferent
12 Ultimate (12_2)
12 (11_1)
OpenGL
4.6
4.6
OpenCLDifferent
2.1
2.1 (1.2)
VulkanDifferent
1.3
1.2.175
Shader ModelDifferent
6.8
6.5 (5.1)

Comparison Summary

7
Specifications Compared
8
Feature Categories
56
Detailed Features

More Comparisons with AMD Radeon RX 6800 XT

Compare AMD Radeon RX 6800 XT with other GPUs of similar performance

AMD Radeon RX 6800 XT vs GeForce RTX 4070 Ti

GeForce RTX 4070 Ti Performance120%

GeForce RTX 4070 Ti is 20% faster than AMD Radeon RX 6800 XT

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AMD Radeon RX 6800 XT vs GeForce RTX 5070

GeForce RTX 5070 Performance119%

GeForce RTX 5070 is 19% faster than AMD Radeon RX 6800 XT

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AMD Radeon RX 6800 XT vs GeForce RTX 3090

GeForce RTX 3090 Performance117%

GeForce RTX 3090 is 17% faster than AMD Radeon RX 6800 XT

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AMD Radeon RX 6800 XT vs GeForce RTX 3080 Ti

GeForce RTX 3080 Ti Performance115%

GeForce RTX 3080 Ti is 15% faster than AMD Radeon RX 6800 XT

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AMD Radeon RX 6800 XT vs GeForce RTX 4070 SUPER

GeForce RTX 4070 SUPER Performance112%

GeForce RTX 4070 SUPER is 12% faster than AMD Radeon RX 6800 XT

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AMD Radeon RX 6800 XT vs Radeon RX 7900 GRE

Radeon RX 7900 GRE Performance110%

Radeon RX 7900 GRE is 10% faster than AMD Radeon RX 6800 XT

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More Comparisons with AMD Radeon HD 7990

Compare AMD Radeon HD 7990 with other GPUs of similar performance

AMD Radeon HD 7990 vs Radeon RX 590

Radeon RX 590 Performance115%

Radeon RX 590 is 15% faster than AMD Radeon HD 7990

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AMD Radeon HD 7990 vs Radeon R9 FURY

Radeon R9 FURY Performance112%

Radeon R9 FURY is 12% faster than AMD Radeon HD 7990

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AMD Radeon HD 7990 vs GeForce GTX 980

GeForce GTX 980 Performance111%

GeForce GTX 980 is 11% faster than AMD Radeon HD 7990

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AMD Radeon HD 7990 vs GeForce GTX 1650 SUPER

GeForce GTX 1650 SUPER Performance110%

GeForce GTX 1650 SUPER is 10% faster than AMD Radeon HD 7990

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AMD Radeon HD 7990 vs Radeon RX 6500 XT

Radeon RX 6500 XT Performance109%

Radeon RX 6500 XT is 9% faster than AMD Radeon HD 7990

Compare Detailed Specs

AMD Radeon HD 7990 vs Radeon RX 5500 XT

Radeon RX 5500 XT Performance108%

Radeon RX 5500 XT is 8% faster than AMD Radeon HD 7990

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