AMD Radeon Pro 455 vs NVIDIA GeForce GTX 770 Comparison

Where Each One Wins

The NVIDIA GeForce GTX 770 and AMD Radeon Pro 455 split their three recorded benchmark wins in a way that maps cleanly onto their intended use cases. The GTX 770 takes the compute-oriented and cross-platform API tests, while the Radeon Pro 455 dominates in Apple's Metal API.

In Geekbench OpenCL, the GTX 770 scores 15,707 against the Radeon Pro 455's 10,336, a 52% advantage. That is the largest gap in either direction between the two cards. The Vulkan test tells a similar story: the GTX 770 posts 19,166 versus 12,240, a 56.6% lead. These two wins give the NVIDIA card a clear edge in general-purpose compute workloads and in any application that runs through Vulkan.

The AMD card's single win is in Geekbench Metal, where it scores 15,916 against the GTX 770's 9,369, a 41.1% margin. Given that the Radeon Pro 455 belongs to the Radeon Pro Mac (400 Series) generation and relies on a portable device for display output, its strength in Metal aligns with its role in macOS environments. The GTX 770, by contrast, is a desktop card from the GeForce 700 generation, a product aimed at a different ecosystem entirely.

The average benchmark scores reflect the overall balance. The GTX 770 averages 14,747 across all tests, while the Radeon Pro 455 averages 12,831, a difference of roughly 15%. The GTX 770 sits at the 57th percentile among all GPUs in the database, while the Radeon Pro 455 sits at the 52nd. Neither card is near the top of the overall rankings, but the GTX 770 holds a consistent edge in aggregate performance.

The use-case split is straightforward: if the workload runs through Metal, the Radeon Pro 455 is the stronger part; if it runs through OpenCL or Vulkan, the GTX 770 wins decisively. The two cards are not direct competitors in the same system, but their benchmark profiles show complementary strengths.

FAQ

Q: Which GPU wins in Geekbench Metal?

A: The AMD Radeon Pro 455 wins with a score of 15,916 against the NVIDIA GeForce GTX 770's 9,369, a 41.1% advantage.

Q: Which GPU wins in Geekbench OpenCL?

A: The NVIDIA GeForce GTX 770 wins with a score of 15,707 against the AMD Radeon Pro 455's 10,336, a 52% lead.

Q: Which GPU wins in Geekbench Vulkan?

A: The NVIDIA GeForce GTX 770 wins with a score of 19,166 against the AMD Radeon Pro 455's 12,240, a 56.6% margin.

Q: What are the average benchmark scores for each card?

A: The NVIDIA GeForce GTX 770 averages 14,747 across all recorded tests, while the AMD Radeon Pro 455 averages 12,831.

Q: How does each card rank among all GPUs in the database?

A: The GTX 770 sits at the 57th percentile, while the Radeon Pro 455 sits at the 52nd percentile.

Q: What is the closest rival to each card based on average score?

A: The GTX 770's nearest rival is the AMD Radeon RX 5500 XT with an average score of 14,692 and a delta of 0.4%. The Radeon Pro 455's nearest rival is the NVIDIA GeForce GTX 590 with an average score of 12,830 and a delta of 0%.

Head-to-Head Benchmarks

The three head-to-head results show a clear pattern, with the GTX 770 winning two of the three tests and by wide margins in both of its victories.

Starting with the largest NVIDIA win, Geekbench Vulkan shows the GTX 770 at 56.6% ahead of the Radeon Pro 455. The scores are 19,166 versus 12,240. This is the biggest single-outcome gap in the comparison, and it points to a strong Vulkan implementation on the Kepler architecture, which lists DirectX 12 (11_0) and Vulkan 1.2.175 support. The Radeon Pro 455's GCN 4.0 architecture supports DirectX 12 (12_0) and Vulkan 1.3, but that newer API version does not translate into a higher score here.

The Geekbench OpenCL result is close in relative terms to the Vulkan gap. The GTX 770 scores 15,707, which is 52% above the Radeon Pro 455's 10,336. The GTX 770's FP32 throughput is listed at 3.333 TFLOPS, while the Radeon Pro 455's is 1,313.3 GFLOPS, so the compute advantage tracks with the raw shading throughput. The GTX 770 also has 1,536 shading units, 128 texture mapping units, and 32 ROPs, versus 768 shading units, 48 TMUs, and 16 ROPs on the AMD part.

The AMD win comes in Geekbench Metal, where the Radeon Pro 455 scores 15,916 against 9,369. That is a 41.1% delta in favor of the AMD card. Metal is Apple's graphics API, and the Radeon Pro 455 is explicitly built for Mac systems, with display outputs marked as portable device dependent. The GTX 770, with its desktop-oriented display outputs (2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2), is not designed for that environment.

Looking at the nearest rivals in the database adds context. The GTX 770's closest competitor by average score is the AMD Radeon RX 5500 XT at 14,692, a delta of 0.4%. The NVIDIA Quadro M2000 at 14,532 is 1.5% behind, and the AMD Radeon Pro 560X at 15,082 is 2.2% ahead. The Radeon Pro 455's nearest rival is the NVIDIA GeForce GTX 590 at 12,830, a delta of 0%, followed by the AMD FirePro W5100 at 12,847 (0.1% behind) and the AMD Radeon 740M at 12,870 (0.3% behind). The 455 essentially trades blows with a decade-old dual-GPU flagship from NVIDIA, which puts its overall standing in perspective.

Specification Differences

The two cards differ in nearly every major specification category, reflecting their different positions in the market. The GTX 770 uses a 28 nm process from TSMC, while the Radeon Pro 455 uses a 14 nm process from GlobalFoundries. The GTX 770's die measures 294 mm² with 3,540 million transistors, giving a transistor density of 12.0M per mm². The Radeon Pro 455's die is 123 mm² with 3,000 million transistors, for a density of 24.4M per mm². The AMD chip is physically much smaller and packs its transistors more tightly.

Memory configurations differ substantially. Both cards have 2 GB of GDDR5, but the GTX 770 uses a 256-bit bus with 224.4 GB/s of bandwidth, while the Radeon Pro 455 uses a 128-bit bus with 81.28 GB/s. The NVIDIA card's memory clock is listed at 1753 MHz with 7 Gbps effective, versus 1270 MHz with 5.1 Gbps effective on the AMD card. The bandwidth gap is roughly 2.76x in favor of the GTX 770.

Compute resources also diverge sharply. The GTX 770 has 1,536 shading units, 128 TMUs, and 32 ROPs. The Radeon Pro 455 has 768 shading units, 48 TMUs, and 16 ROPs. Pixel rate is 34.72 GPixel/s on the GTX 770 versus 13.68 GPixel/s on the Radeon Pro 455. Texture rate is 138.9 GTexel/s versus 41.04 GTexel/s. FP32 throughput is 3.333 TFLOPS versus 1,313.3 GFLOPS. The GTX 770 leads in every raw throughput metric.

Power and physical design are opposite in philosophy. The GTX 770 has a 230 W TDP, is dual-slot, requires 1x 6-pin and 1x 8-pin power connectors, and needs a 550 W suggested PSU. It measures 267 mm in length, 111 mm in height, and 38 mm in width. The Radeon Pro 455 has a 35 W TDP, uses an MXM Module form factor, has no power connectors, and has no listed dimensions or suggested PSU. The GTX 770 is a full-size desktop card; the Radeon Pro 455 is a mobile-class module.

Bus interface and display outputs also differ. The GTX 770 uses PCIe 3.0 x16, while the Radeon Pro 455 uses PCIe 3.0 x8. Display outputs on the GTX 770 are 2x DVI, 1x HDMI 1.4a, and 1x DisplayPort 1.2. The Radeon Pro 455's display outputs are listed as portable device dependent. Release dates are nearly three years apart: the GTX 770 launched on 2013-05-29 with a launch MSRP of 399 USD, while the Radeon Pro 455 launched on 2016-10-29 with no recorded MSRP.

Architecture Differences

The two GPUs come from different architectural generations with fundamentally different design goals. The NVIDIA GeForce GTX 770 is built on Kepler, the architecture behind the GeForce 700 generation, and uses the GK104 chip. The AMD Radeon Pro 455 is built on GCN 4.0, part of the Radeon Pro Mac (400 Series) generation, and uses the Baffin chip.

The process technology gap is significant. Kepler on the GTX 770 uses a 28 nm node at TSMC, while GCN 4.0 on the Radeon Pro 455 uses a 14 nm node at GlobalFoundries. The smaller node allows the AMD chip to achieve a transistor density of 24.4M per mm² versus 12.0M per mm² on the NVIDIA chip, even though the GTX 770 has more total transistors at 3,540 million versus 3,000 million.

The GTX 770's memory clock is 1753 MHz with 7 Gbps effective, feeding a 256-bit bus for 224.4 GB/s of bandwidth. The Radeon Pro 455's memory runs at 1270 MHz with 5.1 Gbps effective on a 128-bit bus for 81.28 GB/s. The NVIDIA card has more than double the memory bandwidth, which matters for texture-heavy workloads and high-resolution rendering.

Shader and geometry resources favor the GTX 770 across the board. It has 1,536 shading units, 128 TMUs, and 32 ROPs; the Radeon Pro 455 has half the shading units at 768, 48 TMUs, and 16 ROPs. The GTX 770's pixel rate is 34.72 GPixel/s and its texture rate is 138.9 GTexel/s. The Radeon Pro 455's rates are 13.68 GPixel/s and 41.04 GTexel/s. FP32 throughput is 3.333 TFLOPS on the GTX 770 versus 1,313.3 GFLOPS on the Radeon Pro 455. Notably, the Radeon Pro 455 lists FP16 at 1,313.3 GFLOPS with a 1:1 ratio to FP32, while the GTX 770 has no listed FP16 figure.

API feature sets differ in interesting ways. The GTX 770 supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.2.175. The Radeon Pro 455 supports DirectX 12 (12_0), OpenGL 4.6, and Vulkan 1.3. The AMD card has a newer DirectX feature level and a newer Vulkan version, but the benchmark results show the GTX 770 winning decisively in both OpenCL and Vulkan, so the newer API versions do not translate into a performance advantage in these tests.

Power efficiency is where the Radeon Pro 455 makes its case. Its 35 W TDP is a fraction of the GTX 770's 230 W, and it requires no external power connectors. This aligns with its MXM Module form factor and portable device dependent display outputs. The GTX 770, by contrast, is a dual-slot desktop card with a 550 W suggested PSU. The Radeon Pro 455 trades raw performance for efficiency and mobility; the GTX 770 does the opposite. In the database's recorded measurements, the GTX 770's extra power budget buys a 52% OpenCL lead and a 56.6% Vulkan lead, while the Radeon Pro 455's efficiency buys a 41.1% Metal lead in its native ecosystem.