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 7770 vs Radeon RX 640 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 7770 vs Radeon RX 640: 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 7770

2012

Why buy it

✅Competitive enough if your priority is price, power, or specific feature preference.

Trade-offs

❌Lower average FPS than Radeon RX 640 across 50 tracked games in our benchmark data.
❌Less VRAM, with 2 GB vs 4 GB for high-resolution textures and newer games.
❌No equivalent frame-generation stack like FSR Frame Generation + AFMF (2023).
❌2012 hardware with 2 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
❌60% higher power demand at 80W vs 50W.

Radeon RX 640

2019

Why buy it

✅40.2% more average FPS across 50 tracked games in our benchmark data.
✅Access to a newer frame-generation stack with FSR Frame Generation + AFMF (2023).
✅100% more VRAM for high-resolution textures and newer games (4 GB vs 2 GB).
✅Radeon HD 7770 is already obsolete for modern gaming, so Radeon RX 640 is the less risky modern option long term.
✅Draws 50W instead of 80W, a 30W reduction.

Trade-offs

❌Older hardware, 4 GB of VRAM, and weaker feature support mean it will age faster in newer AAA releases.

Quick Answers

Which GPU is faster for gaming right now?

Radeon RX 640 is the faster gaming card right now. In our data, it leads by 40.2% in average FPS across 50 tracked games in our benchmark data. PassMark G3D leans toward Radeon HD 7770 instead at 2,173 vs 2,172, 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 RX 640 is the safer long-term pick for 2026 and beyond. The case is simple: 4 GB vs 2 GB of VRAM, native frame generation with FSR Frame Generation + AFMF (2023), while Radeon HD 7770 has no comparable frame-generation support, a 14nm process instead of 28nm, and a newer 2019 generation instead of 2012. That gives it more room for heavier textures and higher settings over time.

Which GPU is the better buy today?

Radeon HD 7770 makes the most sense to buy today. MSRP sits at $159 vs $159, and G3D-per-dollar is basically tied at 13.7 vs 13.7, so the recommendation falls back to the simpler overall buying case for Radeon HD 7770. If you are mainly targeting 1080p and some 1440p, Radeon HD 7770 is the easier value choice. If you care more about 1080p and some 1440p headroom, Radeon RX 640 has the stronger long-term case.

Radeon HD 7770 vs Radeon RX 640 Technical Specifications

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

Radeon HD 7770

The Radeon HD 7770 is manufactured by AMD. It was released in February 15 2012. It features the GCN 1.0 architecture. The core clock speed is 1000 MHz. It has 640 shading units. The thermal design power (TDP) is 80W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 2,173 points. Launch price was $159.

Radeon RX 640

The Radeon RX 640 is manufactured by AMD. It was released in May 13 2019. It features the GCN 4.0 architecture. The core clock ranges from 1082 MHz to 1218 MHz. It has 640 shading units. The thermal design power (TDP) is 50W. Manufactured using 14 nm process technology. G3D Mark benchmark score: 2,172 points.

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Graphics Performance

The Radeon HD 7770 scores 2,173 and the Radeon RX 640 reaches 2,172 in the G3D Mark benchmark — just a 0% difference, making them near-identical in rasterization performance. The Radeon HD 7770 is built on GCN 1.0 while the Radeon RX 640 uses GCN 4.0, both on 28 nm vs 14 nm. Shader units: 640 (Radeon HD 7770) vs 640 (Radeon RX 640). Raw compute: 1.28 TFLOPS (Radeon HD 7770) vs 1.559 TFLOPS (Radeon RX 640).

Feature	Radeon HD 7770	Radeon RX 640
G3D Mark Score	2,173	2,172
Architecture	GCN 1.0	GCN 4.0
Process Node	28 nm	14 nm
Shading Units	640	640
Compute (TFLOPS)	1.28 TFLOPS	1.559 TFLOPS+22%
ROPs	16	16
TMUs	40	40
L1 Cache	160 KB	160 KB
L2 Cache	256 KB	512 KB+100%
Frame Generation	FSR upscaling	FSR 3 + AFMF

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Advanced Features (DLSS/FSR)

The clearest feature edge for the Radeon RX 640 is support for FSR Frame Generation + AFMF. In games that support it, that can smooth out motion and lift perceived FPS. The Radeon HD 7770 does not have comparable native support in the same tier.

Feature	Radeon HD 7770	Radeon RX 640
Upscaling Tech	FSR Upscaling / FSR 4	FSR 3
Frame Generation	Not Supported	FSR Frame Generation + AFMF
Ray Reconstruction	No	No
Low Latency	AMD Anti-Lag	AMD Anti-Lag

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Video Memory (VRAM)

The Radeon HD 7770 has 2 GB of VRAM, while the Radeon RX 640 carries 4 GB. Radeon RX 640 gives you 100% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is 128-bit on the Radeon HD 7770 and 128-bit on the Radeon RX 640. L2 Cache: 256 KB (Radeon HD 7770) vs 512 KB (Radeon RX 640) — the Radeon RX 640 has significantly larger on-die cache to reduce VRAM reliance.

Feature	Radeon HD 7770	Radeon RX 640
VRAM Capacity	2 GB	4 GB+100%
Memory Type	GDDR5	GDDR5
Memory Bandwidth	72 GB/s	Unknown
Bus Width	128-bit	128-bit
L2 Cache	256 KB	512 KB+100%

🖥️

Display & API Support

DirectX support: 12_0 (Radeon HD 7770) vs 12 (FL 12_0) (Radeon RX 640). Maximum simultaneous displays: 4 vs 6.

Feature	Radeon HD 7770	Radeon RX 640
DirectX	12_0	12 (FL 12_0)
Max Displays	4	6+50%

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Media & Encoding

Hardware encoder: VCE 1.0 (Radeon HD 7770) vs VCE 3.4 (Radeon RX 640). Decoder: UVD 3.1 vs UVD 6.3. Supported codecs: H.264 (Radeon HD 7770) vs H.264,H.265/HEVC (Radeon RX 640).

Feature	Radeon HD 7770	Radeon RX 640
Encoder	VCE 1.0	VCE 3.4
Decoder	UVD 3.1	UVD 6.3
Codecs	H.264	H.264,H.265/HEVC

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Power & Dimensions

The Radeon HD 7770 draws 80W versus the Radeon RX 640's 50W — a 46.2% difference. The Radeon RX 640 is more power-efficient. Recommended PSU: 450W (Radeon HD 7770) vs 350W (Radeon RX 640). Power connectors: 1x 6-pin vs PCIe-powered.

Feature	Radeon HD 7770	Radeon RX 640
TDP	80W	50W-38%
Recommended PSU	450W	350W-22%
Power Connector	1x 6-pin	PCIe-powered
Length	210mm	—
Slots	2	1-50%
Perf/Watt	27.2	43.4+60%

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Value Analysis

At launch, the Radeon HD 7770 came in at $159, while the Radeon RX 640 launched at $159. Performance per dollar on MSRP (G3D Mark / MSRP): 13.7 (Radeon HD 7770) vs 13.7 (Radeon RX 640) — the Radeon RX 640 offers 0% better value. The newer card here is Radeon RX 640 (2019 vs 2012).

Feature	Radeon HD 7770	Radeon RX 640
MSRP	$159	$159
Performance per Dollar	13.7	13.7
Codename	Cape Verde	Polaris 23
Release	February 15 2012	May 13 2019
Ranking	#664	#665

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