NVIDIA Quadro K6000 vs NVIDIA RTX PRO 6000 Blackwell Comparison

The NVIDIA Quadro K6000 and the NVIDIA RTX PRO 6000 Blackwell are two flagship professional GPUs separated by roughly twelve years of NVIDIA workstation design, and the recorded data shows a near-total technological reversal between them. The RTX PRO 6000 Blackwell is an active, modern workstation card built on the Blackwell 2.0 architecture with 96 GB of GDDR7, dedicated RT and Tensor cores, and 126.0 TFLOPS of FP32 throughput. The Quadro K6000 is an end-of-life Kepler-era part with 12 GB of GDDR5, 5.196 TFLOPS of FP32, and no hardware ray tracing or AI acceleration of any kind. Despite that gulf in raw capability, their positions in the database's aggregate percentile rankings are surprisingly close, with the older card at the 63rd percentile versus all GPUs and the newer card at the 59th, a quirk explained by the different benchmark suites recorded for each. There are no overlapping benchmark results between the two, so this comparison is fundamentally one of specifications, generation-defining features, and each card's standing against its own recorded rivals.

Where Each One Wins

The RTX PRO 6000 Blackwell wins every contest that can be judged from the specification sheet, and it wins by generational margins rather than incremental ones. Its FP32 compute at 126.0 TFLOPS is roughly twenty-four times the Quadro K6000's 5.196 TFLOPS. Memory capacity is eight times larger at 96 GB versus 12 GB, and memory bandwidth climbs from 288.4 GB/s to 1.79 TB/s, a difference of over six times. Any workload that fits the K6000's 12 GB framebuffer will fit on the Blackwell card many times over, and any workload that does not fit is simply impossible on the Kepler part.

The Quadro K6000, for its part, wins on operational modesty. It draws 225 W through two 6-pin connectors and calls for a 550 W power supply, whereas the Blackwell card draws 600 W through a single 16-pin connector and asks for a 1000 W unit. It is also physically shorter at 267 mm versus 304 mm, and its 111 mm height is lower than the newer card's 137 mm. For a legacy workstation chassis that predates high-wattage power delivery, the K6000 remains the only one of the two that can physically and electrically be accommodated. Both cards are dual-slot designs, so neither has an edge in slot occupancy.

There is also a software-compatibility angle worth stating plainly: the K6000 supports DirectX 12 (11_1), OpenGL 4.6, and Vulkan 1.2.175, while the RTX PRO 6000 Blackwell supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. OpenGL support is identical, which keeps the older card relevant for classic professional OpenGL applications.

Architecture Differences

The architectural distance between these two cards is the story of a decade of GPU development compressed into a single comparison. The Quadro K6000 uses the GK110B chip on the Kepler architecture, manufactured by TSMC on a 28 nm process, packing 7,080 million transistors into a 561 mm² die for a density of 12.6M transistors per square millimetre. The RTX PRO 6000 Blackwell uses the GB202 chip on Blackwell 2.0, built on TSMC's 5 nm process with 92,200 million transistors across a 750 mm² die, reaching 122.9M transistors per square millimetre. That is nearly ten times the transistor count and close to ten times the density, on a die only about a third larger.

The Kepler card has 2880 shading units, 240 TMUs, and 48 ROPs. The Blackwell card has 24064 shading units, 752 TMUs, and 192 ROPs. Fixed-function throughput follows the same pattern: pixel rate rises from 54.12 GPixel/s to 502.5 GPixel/s, and texture rate from 216.5 GTexel/s to 1,968.0 GTexel/s.

Two entire subsystems exist on the Blackwell card that have no counterpart on the K6000. The RTX PRO 6000 carries 188 RT cores for hardware ray tracing and 752 Tensor cores for AI acceleration. The Quadro K6000's record lists none of either, because Kepler predates both technologies. The Blackwell part also reports FP16 throughput of 126.0 TFLOPS at a 1:1 ratio with FP32, a capability the K6000's record does not list at all. On the memory side, the K6000 pairs its 384-bit GDDR5 bus with memory running at an effective 6 Gbps, while the Blackwell card uses a 512-bit GDDR7 interface running at 28 Gbps effective.

Platform connectivity reflects the same generational shift. The K6000 sits on PCIe 3.0 x16; the RTX PRO 6000 uses PCIe 5.0 x16. Display outputs tell a parallel story: the K6000 offers 2x DVI and 2x DisplayPort 1.2, while the Blackwell card provides 4x DisplayPort 2.1b, with no legacy DVI at all. The K6000 shipped on 2013-07-22 as the successor to Quadro Fermi and was itself succeeded by Quadro Maxwell; it is now end-of-life. The RTX PRO 6000 Blackwell launched on 2025-03-17 as the successor to Workstation Ada and is an active product.

Head-to-Head Benchmarks

Direct benchmark comparison is not possible here: the database contains no shared test results between the two cards, and both win and loss counts against each other stand at zero. What the recorded results do show is how each card performs within its own cohort.

The Quadro K6000's three recorded Geekbench results are 7932 in the Metal test, 23749 in OpenCL, and 25409 in Vulkan. Its average benchmark score across the database is 19030, placing it at the 63rd percentile versus all GPUs. Its nearest rivals are a remarkably mixed field for a workstation card: the AMD Radeon RX 6600 averages 19036 for a delta of 0 percent, the NVIDIA GeForce RTX 4050 Mobile averages 19049 for a delta of -0.1 percent, the NVIDIA Tesla K20m averages 19089 at -0.3 percent, and the NVIDIA RTX 2000 Ada Generation averages 18954 at 0.4 percent. In other words, the K6000's aggregate performance sits in a dead heat with a modern mainstream gaming GPU, a current-generation laptop chip, and a contemporary mid-range Ada workstation card. That is a strong aggregate standing for a card released in 2013, driven largely by its solid compute-oriented scores.

The RTX PRO 6000 Blackwell has one recorded result: 16408 in 3DMark Steel Nomad DX12, which also serves as its average score, placing it at the 59th percentile versus all GPUs. Its nearest rivals are the AMD Radeon PRO W7500 at 16415 (a delta of 0 percent), the AMD Radeon RX 5700 XT at 16361 (0.3 percent), the AMD Radeon Pro 5600M at 16351 (0.4 percent), and the NVIDIA GeForce RTX 5090 D V2 at 16504 (-0.6 percent). The percentile difference between the two cards, 63 versus 59, is an artifact of different test suites rather than evidence that the older card is faster; the Blackwell card's specification advantage of roughly twenty-four times the FP32 throughput makes the performance hierarchy unambiguous. The Steel Nomad result simply indexes the Blackwell card against a different population of results.

FAQ

Q: How much more memory does the RTX PRO 6000 Blackwell have?

A: 96 GB of GDDR7 versus 12 GB of GDDR5 on the Quadro K6000, an eightfold capacity advantage, delivered over a 512-bit bus at 1.79 TB/s versus a 384-bit bus at 288.4 GB/s.

Q: Does the Quadro K6000 support ray tracing or AI acceleration?

A: No. The database lists no RT cores and no Tensor cores for the K6000. The RTX PRO 6000 Blackwell has 188 RT cores and 752 Tensor cores.

Q: What power supply does each card need?

A: The Quadro K6000 has a 225 W TDP, two 6-pin connectors, and a 550 W suggested PSU. The RTX PRO 6000 Blackwell has a 600 W TDP, a single 16-pin connector, and a 1000 W suggested PSU.

Q: Which card is still in production?

A: The RTX PRO 6000 Blackwell is an active product launched on 2025-03-17. The Quadro K6000 is end-of-life, launched on 2013-07-22 and succeeded by Quadro Maxwell.

Q: Are the two cards comparable in benchmark scores?

A: Not directly. There are no shared benchmark results between them. The K6000's average score of 19030 puts it at the 63rd percentile versus all GPUs, while the Blackwell card's 16408 Steel Nomad result puts it at the 59th percentile, but these figures come from different tests.

Q: What was each card's launch MSRP?

A: The Quadro K6000 had a launch MSRP of 5,265 USD; the RTX PRO 6000 Blackwell had a launch MSRP of 8,565 USD.

Specification Differences

• Architecture and chip: Kepler GK110B versus Blackwell 2.0 GB202
• Process node: 28 nm versus 5 nm (both TSMC)
• Transistors: 7,080 million versus 92,200 million; density 12.6M/mm² versus 122.9M/mm²; die size 561 mm² versus 750 mm²
• Shading units: 2880 versus 24064; TMUs 240 versus 752; ROPs 48 versus 192
• RT and Tensor cores: none versus 188 RT cores and 752 Tensor cores
• FP32 throughput: 5.196 TFLOPS versus 126.0 TFLOPS; FP16 unlisted versus 126.0 TFLOPS (1:1)
• Pixel and texture rate: 54.12 GPixel/s and 216.5 GTexel/s versus 502.5 GPixel/s and 1,968.0 GTexel/s
• Clocks: 797 MHz base and 902 MHz boost versus 1590 MHz base and 2617 MHz boost
• Memory: 12 GB GDDR5 at 288.4 GB/s on a 384-bit bus versus 96 GB GDDR7 at 1.79 TB/s on a 512-bit bus
• Bus interface: PCIe 3.0 x16 versus PCIe 5.0 x16
• Display outputs: 2x DVI and 2x DisplayPort 1.2 versus 4x DisplayPort 2.1b
• API support: DirectX 12 (11_1) and Vulkan 1.2.175 versus DirectX 12 Ultimate (12_2) and Vulkan 1.4; OpenGL 4.6 on both
• Power: 225 W TDP, 2x 6-pin, 550 W suggested PSU versus 600 W TDP, 1x 16-pin, 1000 W suggested PSU
• Dimensions: 267 mm by 111 mm versus 304 mm by 137 mm by 40 mm; both dual-slot
• Status: end-of-life (2013) versus active (2025)

The Verdict

The data supports exactly one modern purchase: the RTX PRO 6000 Blackwell. It delivers roughly twenty-four times the FP32 compute, eight times the memory, over six times the bandwidth, hardware ray tracing and AI acceleration the K6000 entirely lacks, and a current platform with PCIe 5.0 and DisplayPort 2.1b. Anyone running large models, ray-traced rendering, or GPU compute workloads that exceed 12 GB of memory has no reason to consider the Kepler card.

The Quadro K6000 earns consideration only in legacy contexts: a chassis or PSU built around 225 W dual-6-pin delivery, systems needing DVI outputs, older PCIe 3.0 workstations, or classic OpenGL 4.6 applications where its end-of-life status is immaterial. Its 63rd-percentile aggregate standing and dead-even grouping with the Radeon RX 6600, RTX 4050 Mobile, Tesla K20m, and RTX 2000 Ada Generation show it remains functional for such workloads. But function is not performance. As a head-to-head, this is not a contest; it is a record of how far the technology has moved.