GPU Comparison
Side-by-side comparison of specifications and performance
Performance Comparison
AMD Radeon HD 7990
1977%
1977%
AMD Radeon HD 6450
5%
5%
AMD Radeon HD 7990 is approximately 1972% faster
Technical Specifications
| Specification | AMD Radeon HD 7990 | AMD Radeon HD 6450 |
|---|---|---|
| Graphics ProcessorDifferent | Malta x2 | Caicos |
| CoresDifferent | 2048 x2 | 160 |
| TMUsDifferent | 128 x2 | 8 |
| ROPsDifferent | 32 x2 | 4 |
| Memory SizeDifferent | 3 GB x2 | 512 MB |
| Memory TypeDifferent | GDDR5 | GDDR3 |
| Bus WidthDifferent | 384 bit x2 | 64 bit |
Graphics Processor
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6450 |
|---|---|---|
| GPU NameDifferent | Malta | Caicos |
| GPU VariantDifferent | Malta XT(215-0849026) | Caicos PRO |
| ArchitectureDifferent | GCN 1.0 | TeraScale 2 |
| Foundry | TSMC | TSMC |
| Process SizeDifferent | 28 nm | 40 nm |
| TransistorsDifferent | 4,313 million | 370 million |
| DensityDifferent | 11.8M / mm² | 5.5M / mm² |
| Die SizeDifferent | 365 mm² | 67 mm² |
| Chip PackageDifferent | N/A | FCBGA-631 |
Graphics Card
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6450 |
|---|---|---|
| Release DateDifferent | Apr 24th, 2013 | Apr 7th, 2011 |
| GenerationDifferent | Southern Islands(HD 7900) | Northern Islands(HD 6400) |
| PredecessorDifferent | Northern Islands | Evergreen |
| SuccessorDifferent | Sea Islands | Southern Islands |
| Production | End-of-life | End-of-life |
| Launch PriceDifferent | 999 USD | 55 USD |
| Bus InterfaceDifferent | PCIe 3.0 x16 | PCIe 2.0 x16 |
| ReviewsDifferent | 37 in our database | 14 in our database |
Clock Speeds
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6450 |
|---|---|---|
| Base ClockDifferent | 950 MHz | N/A |
| Boost ClockDifferent | 1000 MHz | N/A |
| Memory ClockDifferent | 1500 MHz6 Gbps effective | 500 MHz1000 Mbps effective |
| GPU ClockDifferent | N/A | 625 MHz |
Memory
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6450 |
|---|---|---|
| Memory SizeDifferent | 3 GB | 512 MB |
| Memory TypeDifferent | GDDR5 | GDDR3 |
| Memory BusDifferent | 384 bit | 64 bit |
| BandwidthDifferent | 288.0 GB/s | 8.000 GB/s |
Render Config
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6450 |
|---|---|---|
| Shading UnitsDifferent | 2048 | 160 |
| TMUsDifferent | 128 | 8 |
| ROPsDifferent | 32 | 4 |
| Compute UnitsDifferent | 32 | 2 |
| L1 CacheDifferent | 16 KB (per CU) | 8 KB (per CU) |
| L2 CacheDifferent | 768 KB | 128 KB |
Theoretical Performance
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6450 |
|---|---|---|
| Pixel RateDifferent | 32.00 GPixel/s | 2.500 GPixel/s |
| Texture RateDifferent | 128.0 GTexel/s | 5.000 GTexel/s |
| FP32 (float)Different | 4.096 TFLOPS | 200.0 GFLOPS |
| FP64 (double)Different | 1,024.0 GFLOPS (1:4) | N/A |
Board Design
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6450 |
|---|---|---|
| Slot WidthDifferent | Dual-slot | Single-slot |
| LengthDifferent | 304 mm12 inches | 168 mm6.6 inches |
| HeightDifferent | 106 mm4.2 inches | N/A |
| WidthDifferent | 38 mm1.5 inches | N/A |
| TDPDifferent | 375 W | 18 W |
| Suggested PSUDifferent | 750 W | 200 W |
| OutputsDifferent | 1x DVI4x mini-DisplayPort 1.2 | 1x DVI1x HDMI 1.3a1x VGA |
| Power ConnectorsDifferent | 2x 8-pin | None |
| Board NumberDifferent | 109-C47637-00A_02 | 109-C26037-00A |
Graphics Features
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6450 |
|---|---|---|
| DirectXDifferent | 12 (11_1) | 11.2 (11_0) |
| OpenGLDifferent | 4.6 | 4.4 |
| OpenCLDifferent | 2.1 (1.2) | 1.2 |
| VulkanDifferent | 1.2.175 | N/A |
| Shader ModelDifferent | 6.5 (5.1) | 5.0 |
Comparison Summary
7
Specifications Compared
8
Feature Categories
49
Detailed Features
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
Compare Detailed Specs
AMD Radeon HD 7990 vs Radeon R9 FURY
Radeon R9 FURY Performance112%
Radeon R9 FURY is 12% faster than AMD Radeon HD 7990
Compare Detailed Specs
AMD Radeon HD 7990 vs GeForce GTX 980
GeForce GTX 980 Performance111%
GeForce GTX 980 is 11% faster than AMD Radeon HD 7990
Compare Detailed Specs
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
Compare Detailed Specs
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
Compare Detailed Specs
More Comparisons with AMD Radeon HD 6450
Compare AMD Radeon HD 6450 with other GPUs of similar performance
AMD Radeon HD 6450 vs GeForce GT 520
GeForce GT 520 Performance106%
GeForce GT 520 is 6% faster than AMD Radeon HD 6450
Compare Detailed Specs
AMD Radeon HD 6450 vs Radeon HD 6450
Radeon HD 6450 Performance100%
Radeon HD 6450 is 0% slower than AMD Radeon HD 6450
Compare Detailed Specs
AMD Radeon HD 6450 vs Radeon HD 5450
Radeon HD 5450 Performance85%
Radeon HD 5450 is 15% slower than AMD Radeon HD 6450
Compare Detailed Specs
AMD Radeon HD 6450 vs Radeon HD 6450
Radeon HD 6450 Performance100%
Radeon HD 6450 is 0% slower than AMD Radeon HD 6450
Compare Detailed Specs
AMD Radeon HD 6450 vs Radeon HD 6450
Radeon HD 6450 Performance100%
Radeon HD 6450 is 0% slower than AMD Radeon HD 6450
Compare Detailed Specs