Radeon RX 640 vs GeForce 6600 GT

Place in the ranking	1273	616
Place by popularity	not in top-100	not in top-100
Power efficiency	no data	7.29
Architecture	Curie (2003−2013)	GCN 4.0 (2016−2020)
GPU code name	NV43 A2	Polaris 23
Market segment	Desktop	Laptop
Release date	12 August 2004 (20 years ago)	13 May 2019 (5 years ago)
Launch price (MSRP)	$64.95	no data

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	640
Core clock speed	500 MHz	1082 MHz
Boost clock speed	no data	1218 MHz
Number of transistors	146 million	2,200 million
Manufacturing process technology	110 nm	14 nm
Power consumption (TDP)	no data	50 Watt
Texture fill rate	4.000	48.72
Floating-point processing power	no data	1.559 TFLOPS
ROPs	4	16
TMUs	8	40

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).

Laptop size	no data	large
Interface	PCIe 1.0 x16	PCIe 3.0 x8
Width	1-slot	no data
Supplementary power connectors	None	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	GDDR5
Maximum RAM amount	128 MB	2 GB
Memory bus width	128 Bit	64 Bit
Memory clock speed	500 MHz	1500 MHz
Memory bandwidth	16 GB/s	48 GB/s
Shared memory	-	-

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display Connectors

1x DVI, 1x VGA, 1x S-Video

No outputs

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

FreeSync

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX	9.0c (9_3)	12 (12_0)
Shader Model	3.0	6.4
OpenGL	2.1	4.6
OpenCL	N/A	2.0
Vulkan	N/A	1.2.131

Synthetic benchmark performance

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. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

6600 GT 0.37

RX 640 5.32
+1338%

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.

6600 GT 142

RX 640 2049
+1343%

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Average FPS across all PC games

Here are the average frames per second in a large set of popular games across different resolutions:

Full HD

1−2

−2600%

27
+2600%

Cost per frame, $

1080p

64.95

no data

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

9−10

+0%

9−10

+0%

Full HD
Medium Preset

Assassin's Creed Odyssey	20 +0%	20 +0%
Assassin's Creed Valhalla	5−6 +0%	5−6 +0%
Battlefield 5	12−14 +0%	12−14 +0%
Call of Duty: Modern Warfare	10−12 +0%	10−12 +0%
Cyberpunk 2077	9−10 +0%	9−10 +0%
Far Cry 5	10−12 +0%	10−12 +0%
Far Cry New Dawn	14−16 +0%	14−16 +0%
Forza Horizon 4	30−35 +0%	30−35 +0%
Hitman 3	10−12 +0%	10−12 +0%
Horizon Zero Dawn	30−35 +0%	30−35 +0%
Metro Exodus	27 +0%	27 +0%
Red Dead Redemption 2	26 +0%	26 +0%
Shadow of the Tomb Raider	18−20 +0%	18−20 +0%
Watch Dogs: Legion	45−50 +0%	45−50 +0%

Full HD
High Preset

Assassin's Creed Odyssey	14−16 +0%	14−16 +0%
Assassin's Creed Valhalla	5−6 +0%	5−6 +0%
Battlefield 5	12−14 +0%	12−14 +0%
Call of Duty: Modern Warfare	10−12 +0%	10−12 +0%
Cyberpunk 2077	9−10 +0%	9−10 +0%
Far Cry 5	10−12 +0%	10−12 +0%
Far Cry New Dawn	14−16 +0%	14−16 +0%
Forza Horizon 4	30−35 +0%	30−35 +0%
Hitman 3	10−12 +0%	10−12 +0%
Horizon Zero Dawn	30−35 +0%	30−35 +0%
Metro Exodus	10 +0%	10 +0%
Red Dead Redemption 2	14−16 +0%	14−16 +0%
Shadow of the Tomb Raider	18−20 +0%	18−20 +0%
The Witcher 3: Wild Hunt	18−20 +0%	18−20 +0%
Watch Dogs: Legion	45−50 +0%	45−50 +0%

Full HD
Ultra Preset

Assassin's Creed Odyssey	14−16 +0%	14−16 +0%
Assassin's Creed Valhalla	5−6 +0%	5−6 +0%
Call of Duty: Modern Warfare	10−12 +0%	10−12 +0%
Cyberpunk 2077	9−10 +0%	9−10 +0%
Far Cry 5	10−12 +0%	10−12 +0%
Forza Horizon 4	30−35 +0%	30−35 +0%
Hitman 3	10−12 +0%	10−12 +0%
Horizon Zero Dawn	30−35 +0%	30−35 +0%
Shadow of the Tomb Raider	18−20 +0%	18−20 +0%
The Witcher 3: Wild Hunt	11 +0%	11 +0%
Watch Dogs: Legion	45−50 +0%	45−50 +0%

Full HD
Epic Preset

Red Dead Redemption 2

14−16

+0%

14−16

+0%

1440p
High Preset

Battlefield 5	10−11 +0%	10−11 +0%
Far Cry New Dawn	8−9 +0%	8−9 +0%

1440p
Ultra Preset

Assassin's Creed Odyssey	5−6 +0%	5−6 +0%
Assassin's Creed Valhalla	0−1	0−1
Call of Duty: Modern Warfare	4−5 +0%	4−5 +0%
Cyberpunk 2077	2−3 +0%	2−3 +0%
Far Cry 5	6−7 +0%	6−7 +0%
Forza Horizon 4	12−14 +0%	12−14 +0%
Hitman 3	9−10 +0%	9−10 +0%
Horizon Zero Dawn	10−12 +0%	10−12 +0%
Metro Exodus	3−4 +0%	3−4 +0%
The Witcher 3: Wild Hunt	4−5 +0%	4−5 +0%
Watch Dogs: Legion	30−35 +0%	30−35 +0%

1440p
Epic Preset

Red Dead Redemption 2

9−10

+0%

9−10

+0%

4K
High Preset

Battlefield 5	4−5 +0%	4−5 +0%
Far Cry New Dawn	3−4 +0%	3−4 +0%
Hitman 3	1−2 +0%	1−2 +0%
Horizon Zero Dawn	8−9 +0%	8−9 +0%
Metro Exodus	2−3 +0%	2−3 +0%
The Witcher 3: Wild Hunt	1−2 +0%	1−2 +0%

4K
Ultra Preset

Assassin's Creed Odyssey	3−4 +0%	3−4 +0%
Assassin's Creed Valhalla	2−3 +0%	2−3 +0%
Call of Duty: Modern Warfare	2−3 +0%	2−3 +0%
Cyberpunk 2077	0−1	0−1
Far Cry 5	3−4 +0%	3−4 +0%
Forza Horizon 4	4−5 +0%	4−5 +0%
Watch Dogs: Legion	1−2 +0%	1−2 +0%

4K
Epic Preset

Red Dead Redemption 2

6−7

+0%

6−7

+0%

This is how 6600 GT and RX 640 compete in popular games:

RX 640 is 2600% faster in 1080p

All in all, in popular games:

there's a draw in 68 tests (100%)

Pros & cons summary

Performance score	0.37	5.32
Recency	12 August 2004	13 May 2019
Maximum RAM amount	128 MB	2 GB
Chip lithography	110 nm	14 nm

RX 640 has a 1337.8% higher aggregate performance score, an age advantage of 14 years, a 1500% higher maximum VRAM amount, and a 685.7% more advanced lithography process.

The Radeon RX 640 is our recommended choice as it beats the GeForce 6600 GT in performance tests.

Be aware that GeForce 6600 GT is a desktop card while Radeon RX 640 is a notebook one.

Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.