Radeon RX 6600 XT vs ATI Mobility HD 4870 X2

Place in the ranking	761	88
Place by popularity	not in top-100	79
Cost-effectiveness evaluation	no data	61.69
Power efficiency	no data	18.48
Architecture	TeraScale (2005−2013)	RDNA 2.0 (2020−2024)
GPU code name	M98	Navi 23
Market segment	Laptop	Desktop
Release date	9 January 2009 (16 years ago)	30 July 2021 (3 years ago)
Launch price (MSRP)	no data	$379

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

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	800	2048
Core clock speed	550 MHz	1968 MHz
Boost clock speed	no data	2589 MHz
Number of transistors	956 million	11,060 million
Manufacturing process technology	55 nm	7 nm
Power consumption (TDP)	no data	160 Watt
Texture fill rate	22.00	331.4
Floating-point processing power	0.88 TFLOPS	10.6 TFLOPS
ROPs	16	64
TMUs	40	128
Ray Tracing Cores	no data	32

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	large	no data
Interface	PCIe 2.0 x16	PCIe 4.0 x8
Length	no data	190 mm
Width	no data	2-slot
Supplementary power connectors	no data	1x 8-pin

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	GDDR5	GDDR6
Maximum RAM amount	1 GB	8 GB
Memory bus width	256 Bit	128 Bit
Memory clock speed	700 MHz	2000 MHz
Memory bandwidth	89.6 GB/s	256.0 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	No outputs	1x HDMI, 2x DisplayPort
HDMI	-	+

API compatibility

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

DirectX	10.1 (10_1)	12.0 Ultimate (12_2)
Shader Model	4.1	6.5
OpenGL	3.3	4.6
OpenCL	1.1	2.1
Vulkan	N/A	1.2

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.

ATI Mobility HD 4870 X2 3.12

RX 6600 XT 42.96
+1277%

3DMark Vantage Performance

3DMark Vantage is an outdated DirectX 10 benchmark using 1280x1024 screen resolution. It taxes the graphics card with two scenes, one depicting a girl escaping some militarized base located within a sea cave, the other displaying a space fleet attack on a defenseless planet. It was discontinued in April 2017, and Time Spy benchmark is now recommended to be used instead.

ATI Mobility HD 4870 X2 8396

RX 6600 XT 88163
+950%

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	42 −219%	134 +219%
1440p	5−6 −1440%	77 +1440%
4K	3−4 −1400%	45 +1400%

Cost per frame, $

1080p	no data	2.83
1440p	no data	4.92
4K	no data	8.42

FPS performance in popular games

Full HD
Low Preset

Counter-Strike 2	10−12 −991%	120 +991%
Cyberpunk 2077	7−8 −1029%	79 +1029%
Elden Ring	6−7 −1983%	125 +1983%

Full HD
Medium Preset

Battlefield 5	8−9 −1263%	100−110 +1263%
Counter-Strike 2	10−12 −736%	90−95 +736%
Cyberpunk 2077	7−8 −971%	75 +971%
Forza Horizon 4	14−16 −1736%	257 +1736%
Metro Exodus	6−7 −2083%	131 +2083%
Red Dead Redemption 2	10−12 −655%	80−85 +655%
Valorant	2−3 −8600%	170−180 +8600%

Full HD
High Preset

Battlefield 5	8−9 −1263%	100−110 +1263%
Counter-Strike 2	10−12 −736%	90−95 +736%
Cyberpunk 2077	7−8 −971%	75 +971%
Dota 2	9−10 −1533%	147 +1533%
Elden Ring	6−7 −2533%	158 +2533%
Far Cry 5	16−18 −282%	65 +282%
Fortnite	16−18 −971%	180−190 +971%
Forza Horizon 4	14−16 −1393%	209 +1393%
Grand Theft Auto V	9−10 −1400%	135 +1400%
Metro Exodus	6−7 −1567%	100 +1567%
PLAYERUNKNOWN'S BATTLEGROUNDS	27−30 −639%	200−210 +639%
Red Dead Redemption 2	10−12 −655%	80−85 +655%
The Witcher 3: Wild Hunt	10−12 −1309%	150−160 +1309%
Valorant	2−3 −8600%	170−180 +8600%
World of Tanks	55−60 −407%	270−280 +407%

Full HD
Ultra Preset

Battlefield 5	8−9 −1263%	100−110 +1263%
Counter-Strike 2	10−12 −509%	67 +509%
Cyberpunk 2077	7−8 −843%	66 +843%
Dota 2	9−10 −1233%	120 +1233%
Far Cry 5	16−18 −494%	100−110 +494%
Forza Horizon 4	14−16 −1207%	183 +1207%
PLAYERUNKNOWN'S BATTLEGROUNDS	27−30 −639%	200−210 +639%
Valorant	2−3 −8600%	170−180 +8600%

1440p
High Preset

Dota 2	1−2 −6700%	68 +6700%
Elden Ring	3−4 −2567%	80 +2567%
Grand Theft Auto V	1−2 −6700%	68 +6700%
PLAYERUNKNOWN'S BATTLEGROUNDS	21−24 −695%	170−180 +695%
Red Dead Redemption 2	2−3 −2100%	40−45 +2100%
World of Tanks	21−24 −1136%	270−280 +1136%

1440p
Ultra Preset

Battlefield 5	3−4 −2467%	75−80 +2467%
Counter-Strike 2	9−10 −333%	39 +333%
Cyberpunk 2077	3−4 −1167%	38 +1167%
Far Cry 5	8−9 −1625%	130−140 +1625%
Forza Horizon 4	1−2 −11700%	118 +11700%
The Witcher 3: Wild Hunt	4−5 −1825%	75−80 +1825%
Valorant	10−11 −1300%	140−150 +1300%

4K
High Preset

Dota 2	16−18 −300%	64 +300%
Elden Ring	1−2 −3300%	34 +3300%
Grand Theft Auto V	14−16 −327%	64 +327%
PLAYERUNKNOWN'S BATTLEGROUNDS	9−10 −1467%	140−150 +1467%
Red Dead Redemption 2	2−3 −1300%	27−30 +1300%
The Witcher 3: Wild Hunt	16−18 −300%	64 +300%

4K
Ultra Preset

Battlefield 5	2−3 −2450%	50−55 +2450%
Cyberpunk 2077	1−2 −1200%	13 +1200%
Dota 2	16−18 −438%	86 +438%
Far Cry 5	3−4 −2100%	65−70 +2100%
Fortnite	2−3 −3050%	60−65 +3050%
Forza Horizon 4	0−1	61
Valorant	3−4 −2400%	75−80 +2400%

1440p
Ultra Preset

Metro Exodus

+0%

4K
High Preset

Counter-Strike 2	45−50 +0%	45−50 +0%
Metro Exodus	34 +0%	34 +0%

4K
Ultra Preset

Counter-Strike 2

45−50

+0%

45−50

+0%

This is how ATI Mobility HD 4870 X2 and RX 6600 XT compete in popular games:

RX 6600 XT is 219% faster in 1080p
RX 6600 XT is 1440% faster in 1440p
RX 6600 XT is 1400% faster in 4K

Here's the range of performance differences observed across popular games:

in Forza Horizon 4, with 1440p resolution and the Ultra Preset, the RX 6600 XT is 11700% faster.

All in all, in popular games:

RX 6600 XT is ahead in 58 tests (94%)
there's a draw in 4 tests (6%)

Pros & cons summary

Performance score	3.12	42.96
Recency	9 January 2009	30 July 2021
Maximum RAM amount	1 GB	8 GB
Chip lithography	55 nm	7 nm

RX 6600 XT has a 1276.9% higher aggregate performance score, an age advantage of 12 years, a 700% higher maximum VRAM amount, and a 685.7% more advanced lithography process.

The Radeon RX 6600 XT is our recommended choice as it beats the Mobility Radeon HD 4870 X2 in performance tests.

Be aware that Mobility Radeon HD 4870 X2 is a notebook card while Radeon RX 6600 XT is a desktop one.

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