Radeon RX 6800 XT vs Radeon HD 8990 OEM
Summary
Reasons to consider Radeon RX 6800 XT |
| 75 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the Radeon HD 8990 OEM . |
| This is a much newer product, it might have better long term support. |
| Higher theoretical gaming performance, based on specifications. |
| Supports Direct3D 12 Async Compute |
| Supports FreeSync |
| Supports ReLive (allows game streaming/recording with minimum performance penalty) |
| Infinity Cache allows to deliver up to 3.25x the effective memory bandwidth |
| Supports DirectX Raytracing (DXR) |
Reasons to consider Radeon HD 8990 OEM |
| Supports Direct3D 12 Async Compute |
| Supports ReLive (allows game streaming/recording with minimum performance penalty) |
| Supports Mantle |
| Based on an outdated architecture (AMD GCN), there may be no performance optimizations for current games and applications |
HWBench recommends Radeon RX 6800 XT
Based on theoretical specifications.
Core Configuration
| Radeon RX 6800 XT | | Radeon HD 8990 OEM | |
|---|
| GPU Name | Navi 21 (Navi 21 XT) | vs | Malta () |
| Fab Process | 7 nm | vs | 28 nm |
| Die Size | 536 mm² | vs | 365 mm² |
| Transistors | 26,800 million | vs | 4,313 million |
| Shaders | 4608 | vs | 2048 |
| Compute Units | 72 | vs | 32 |
| Core clock | 1825 MHz | vs | 950 MHz |
| ROPs | 128 | vs | 32 |
| TMUs | 288 | vs | 128 |
Memory Configuration
| Radeon RX 6800 XT | | Radeon HD 8990 OEM | |
|---|
| Memory Type | GDDR6 | vs | GDDR5 |
| Bus Width | 256 bit | vs | 384 bit x2 |
| Memory Speed | 2000 MHz
16 Gbps effective | vs | 1500 MHz
6000 MHz effective |
| Memory Size | 16384 Mb | vs | 3072 Mb |
Additional details
| Radeon RX 6800 XT | | Radeon HD 8990 OEM | |
|---|
| TDP | 300 watts | vs | 375 watts |
| Release Date | 28 Oct 2020 | vs | 24 Apr 2013 |
Radeon RX 6800 XT
288.00 GP/s
Radeon HD 8990 OEM
60.80 GP/s
GigaPixels - higher is better
Radeon RX 6800 XT
648.00 GT/s
Radeon HD 8990 OEM
244.00 GT/s
GigaTexels - higher is better
Radeon RX 6800 XT
512.00 GB/s
Radeon HD 8990 OEM
576.00 GB/s
GB/s - higher is better
Radeon RX 6800 XT
20740.00 GFLOPs
Radeon HD 8990 OEM
7782.00 GFLOPs
GFLOPs - higher is better