Radeon HD 6990 vs Radeon Pro 455

G3D Mark is a standard benchmark that measures graphics performance in real-world gaming scenarios. It simplifies comparing cards from different brands, where higher scores directly correlate with better fps and smoother gaming experiences.

Radeon HD 6990 vs Radeon Pro 455 FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with Ryzen 7 9800X3D to isolate GPU performance.

Search any supported game below to compare 1080p FPS for both components.

Radeon HD 6990 vs Radeon Pro 455: Pros, Cons & Final Verdict

See where each GPU makes more sense in practice: raw FPS, VRAM, features, power draw, pricing, and long-term headroom.

Radeon HD 6990

2011

Why buy it

✅43.3% more average FPS across 50 tracked games in our benchmark data.
✅Delivers 100+% more G3D Mark for each dollar spent, at 4.3 vs 0 G3D/$ ($699 MSRP vs Unknown MSRP).

Trade-offs

❌2011 hardware with 2 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌971.4% higher power demand at 375W vs 35W.
❌30900% longer card at 310mm vs 1mm.

Radeon Pro 455

2016

Why buy it

✅Draws 35W instead of 375W, a 340W reduction.
✅Measures 1mm instead of 310mm, a 309mm shorter card that is more SFF-friendly.
✅More future proof: GCN 4.0 (2016−2020) on 14nm with a newer platform for upcoming games.

Trade-offs

❌Lower average FPS than Radeon HD 6990 across 50 tracked games in our benchmark data.
❌2016 hardware with 2 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌Lower G3D Mark per dollar, at 0 vs 4.3 G3D/$ (Unknown MSRP vs $699 MSRP).

Quick Answers

Which GPU is faster for gaming right now?

Radeon HD 6990 is the faster gaming card right now. In our data, it leads by 43.3% in average FPS across 50 tracked games in our benchmark data. PassMark G3D leans toward Radeon Pro 455 instead at 3,113 vs 3,014, so for this question the real-game FPS result matters more than the synthetic split.

Which GPU is the safer long-term pick for 2026 and beyond?

Radeon HD 6990 is the safer long-term pick for 2026 and beyond because it comes out ahead on the available hardware-headroom signals for this matchup.

Which GPU is the better buy today?

Radeon HD 6990 makes the most sense today based on the pricing and value data we have for this matchup.

Radeon HD 6990 vs Radeon Pro 455 Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

Radeon HD 6990

The Radeon HD 6990 is manufactured by AMD. It was released in March 8 2011. It features the TeraScale 3 architecture. The core clock speed is 830 MHz. It has 1536 ×2 shading units. The thermal design power (TDP) is 375W. Manufactured using 40 nm process technology. G3D Mark benchmark score: 3,014 points. Launch price was $699.

Radeon Pro 455

The Radeon Pro 455 is manufactured by AMD. It was released in October 30 2016. It features the GCN 4.0 architecture. The core clock speed is 855 MHz. It has 768 shading units. The thermal design power (TDP) is 35W. Manufactured using 14 nm process technology. G3D Mark benchmark score: 3,113 points.

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Graphics Performance

The Radeon HD 6990 scores 3,014 and the Radeon Pro 455 reaches 3,113 in the G3D Mark benchmark — just a 3.3% difference, making them near-identical in rasterization performance. The Radeon HD 6990 is built on TeraScale 3 while the Radeon Pro 455 uses GCN 4.0, both on 40 nm vs 14 nm. Shader units: 1,536 (Radeon HD 6990) vs 768 (Radeon Pro 455). Raw compute: 2.55 TFLOPS ×2 (Radeon HD 6990) vs 1.313 TFLOPS (Radeon Pro 455).

Feature	Radeon HD 6990	Radeon Pro 455
G3D Mark Score	3,014	3,113+3%
Architecture	TeraScale 3	GCN 4.0
Process Node	40 nm	14 nm
Shading Units	1536 ×2+100%	768
Compute (TFLOPS)	2.55 TFLOPS ×2+94%	1.313 TFLOPS
ROPs	32 ×2+100%	16
TMUs	96 ×2+100%	48
L1 Cache	384 KB+100%	192 KB
L2 Cache	0.5 MB	1 MB+100%
Frame Generation	FSR upscaling	FSR upscaling

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Advanced Features (DLSS/FSR)

Feature	Radeon HD 6990	Radeon Pro 455
Upscaling Tech	FSR Upscaling / FSR 4	FSR Upscaling / FSR 4
Frame Generation	Not Supported	Not Supported
Ray Reconstruction	No	No
Low Latency	AMD Anti-Lag	AMD Anti-Lag

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Video Memory (VRAM)

Both cards ship with 2 GB of GDDR5. Memory bus width is 128-bit on the Radeon HD 6990 and 64-bit on the Radeon Pro 455. L2 Cache: 0.5 MB (Radeon HD 6990) vs 1 MB (Radeon Pro 455) — the Radeon Pro 455 has significantly larger on-die cache to reduce VRAM reliance.

Feature	Radeon HD 6990	Radeon Pro 455
VRAM Capacity	2 GB	2 GB
Memory Type	GDDR5	GDDR5
Bus Width	128-bit+100%	64-bit
L2 Cache	0.5 MB	1 MB+100%

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Display & API Support

DirectX support: 11.2 (Radeon HD 6990) vs 12_0 (Radeon Pro 455). Maximum simultaneous displays: 5 vs 0.

Feature	Radeon HD 6990	Radeon Pro 455
DirectX	11.2	12_0+7%
Max Displays	5	0

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Media & Encoding

Hardware encoder: None (Radeon HD 6990) vs VCE 3.4 (Radeon Pro 455). Decoder: UVD 3.0 vs UVD 6.3.

Feature	Radeon HD 6990	Radeon Pro 455
Encoder	None	VCE 3.4
Decoder	UVD 3.0	UVD 6.3
Codecs	H.264,VC-1,MPEG-2,MPEG-4	—

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Power & Dimensions

The Radeon HD 6990 draws 375W versus the Radeon Pro 455's 35W — a 165.9% difference. The Radeon Pro 455 is more power-efficient. Recommended PSU: 750W (Radeon HD 6990) vs 350W (Radeon Pro 455). Power connectors: 2x 8-pin vs PCIe-powered. Card length: 310mm vs 1mm, occupying 2 vs 0 slots.

Feature	Radeon HD 6990	Radeon Pro 455
TDP	375W	35W-91%
Recommended PSU	750W	350W-53%
Power Connector	2x 8-pin	PCIe-powered
Length	310mm	1mm
Height	115mm	—
Slots	2	0-100%
Temp (Load)	85	—
Perf/Watt	8.0	88.9+1011%

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Value Analysis

At launch, the Radeon HD 6990 came in at $699, while the Radeon Pro 455 launched at $0. On MSRP, Radeon Pro 455 was 100+% cheaper ($699 less). Performance per dollar on MSRP (G3D Mark / MSRP): 4.3 (Radeon HD 6990) vs Infinity (Radeon Pro 455) — the Radeon Pro 455 offers Infinity% better value. The newer card here is Radeon Pro 455 (2016 vs 2011).

Feature	Radeon HD 6990	Radeon Pro 455
MSRP	$699	$0-100%
Performance per Dollar	4.3	Infinity
Codename	Antilles	Baffin
Release	March 8 2011	October 30 2016
Ranking	#583	#577

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