RTX PRO 4000 Blackwell SFF vs GeForce 6800 GT
Aggregate performance score
We've compared GeForce 6800 GT with RTX PRO 4000 Blackwell SFF, including specs and performance data.
RTX PRO 4000 Blackwell SFF outperforms 6800 GT by a whopping 21000% based on our aggregate benchmark results.
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1352 | 16 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 0.39 | 78.75 |
| Architecture | Curie (2003−2013) | Blackwell 2.0 (2025−2026) |
| GPU code name | NV45 | GB203 |
| Market segment | Desktop | Workstation |
| Release date | 8 June 2004 (21 years ago) | 11 August 2025 (less than a year ago) |
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | no data | 8960 |
| Core clock speed | 350 MHz | 577 MHz |
| Boost clock speed | no data | 1432 MHz |
| Number of transistors | 222 million | 45,600 million |
| Manufacturing process technology | 130 nm | 5 nm |
| Power consumption (TDP) | 67 Watt | 70 Watt |
| Texture fill rate | 5.600 | 401.0 |
| Floating-point processing power | no data | 25.66 TFLOPS |
| ROPs | 16 | 96 |
| TMUs | 16 | 280 |
| Tensor Cores | no data | 280 |
| Ray Tracing Cores | no data | 70 |
| L1 Cache | no data | 8.8 MB |
| L2 Cache | no data | 48 MB |
Form factor & compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Interface | PCIe 1.0 x16 | PCIe 5.0 x8 |
| Length | no data | 167 mm |
| Width | 1-slot | 2-slot |
| Supplementary power connectors | 1x 6-pin | None |
VRAM capacity and type
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | GDDR3 | GDDR7 |
| Maximum RAM amount | 256 MB | 24 GB |
| Memory bus width | 256 Bit | 192 Bit |
| Memory clock speed | 500 MHz | 1125 MHz |
| Memory bandwidth | 32 GB/s | 432.0 GB/s |
| Resizable BAR | - | + |
Connectivity and outputs
This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.
| Display Connectors | 2x DVI, 1x S-Video | 4x mini-DisplayPort 2.1b |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 9.0c (9_3) | 12 Ultimate (12_2) |
| Shader Model | 3.0 | 6.8 |
| OpenGL | 2.1 | 4.6 |
| OpenCL | N/A | 3.0 |
| Vulkan | N/A | 1.4 |
| CUDA | - | 12.0 |
| DLSS | - | + |
Synthetic benchmarks
Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark score.
Passmark
This is the most ubiquitous GPU benchmark. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Pros & cons summary
| Performance score | 0.34 | 71.74 |
| Recency | 8 June 2004 | 11 August 2025 |
| Maximum RAM amount | 256 MB | 24 GB |
| Chip lithography | 130 nm | 5 nm |
| Power consumption (TDP) | 67 Watt | 70 Watt |
6800 GT has 4.5% lower power consumption.
RTX PRO 4000 Blackwell SFF, on the other hand, has a 21000% higher aggregate performance score, an age advantage of 21 years, a 9500% higher maximum VRAM amount, and a 2500% more advanced lithography process.
The RTX PRO 4000 Blackwell SFF is our recommended choice as it beats the GeForce 6800 GT in performance tests.
Be aware that GeForce 6800 GT is a desktop graphics card while RTX PRO 4000 Blackwell SFF is a workstation one.
Other comparisons
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